A method for controlling the length of a sprocket chain of a chain type includes alternately arranged inner chain links and outer chain links that are connected together by, means of a chain joint, wherein each outer chain link has two outer plates, each of which comprises two openings and two pins that are pressed into the openings of the outer plates, each pin of the outer chain links having a joint region, which contacts the inner chain link and has a joint diameter, and two joining regions, which are pressed into the openings of the outer plates and have a joining diameter. The method prevents the disadvantages known from the prior art and in particular leads to a simple chain length control. For this purpose, the method has the following steps: providing a pin set comprising a plurality of pins, wherein at least two of the pins of the pin set have different joint diameters in the joint regions; and for at least one of the pins of the pin set; the joint diameter of the joint region differs from the joining diameter of the joining regions; ascertaining the pin joint region diameter required for a specified chain length; selecting the pin with the ascertained joint region diameter from the pin set; pressing the joining regions of the pin into the openings in the outer plates; and completing the sprocket chain. The use of a pin in such a method and to a pin set for such a method is also provided.
A chain for a chain drive includes alternating inner chain links and outer chain links, which are connected together in an articulated manner by means of a respective chain joint. Each outer chain link includes two outer plates, each of which comprises two openings and two pins, and the pins and openings are connected together by means of a respective compression connection such that the pins hold the outer plates at a distance from each other. The chain for a chain drive prevents the disadvantages known from the prior art and leading in particular to a higher fatigue strength. This is achieved in that a beveled joint is formed in the region of the compression connection between the pins and the openings in the outer plates.
A tensioning device, more particularly a hydraulically actuated chain tensioner, for a chain drive of an internal combustion engine, having a tensioner housing, a tensioning piston which is displaceably guided in a piston bore of the tensioner housing and has a piston skirt, a transport securing means for fastening the tensioning piston in the tensioner housing, a adjustment apparatus for incrementally adjusting and limiting the working range of the tensioning piston, and a final position securing means for the captive arrangement of the tensioning piston in the piston bore. The transport securing means, the adjustment apparatus and the final position securing means together have a single securing ring for fastening the tensioning piston in the tensioner housing, the incremental adjustment and limiting of the working range of the tensioning piston and the captive arrangement of the tensioning piston. A chain drive, more particularly a control chain drive, of an internal combustion engine, having such a tensioning device is also provided.
An articulated chain with alternating inner chain links and outer chain links which are each connected to each other by means of a chain joint, wherein each outer chain link comprises at least two outer link plates and two chain studs connecting them to each other, each inner chain link comprises at least two inner link plates and two joint sleeves connecting them to each other, and for forming a chain joint, one chain stud each of the outer chain link extends through a joint sleeve of the inner chain link. The joint sleeves of the inner chain links are embodied as winding sleeves and firmly connected to the inner link plates, wherein the sleeve joints of the two winding sleeves are positioned on the same side of a link plate's longitudinal axis and face each other, and the sleeve joints are arranged at a distance to the link plate's longitudinal axis and at a distance to an upper apex or to a lower inflection point of the winding sleeve.
A longitudinally adjustable connecting rod for a piston engine, where the connecting rod includes a first connecting rod end for receiving a piston pin and a second connecting rod end for receiving a crankshaft journal, where the distance between the piston pin and the crankshaft journal is adjustable in the longitudinal direction (A) of the connecting rod by way of a hydraulic control device with a hydraulic control valve. The hydraulic control valve comprises a control cylinder and a control slide which is guided in a slidable manner in the control cylinder and which can be pressurized, and at least one outlet valve which can be actuated by the control slide. The control slide comprises a control piston which is arranged on the end face, with a control pressure surface which can be subjected to the hydraulic control pressure and which defines a control pressure chamber in the control cylinder. The use of such a longitudinally adjustable connecting rod with a hydraulic control device in a piston engine as well as a corresponding piston engine is also provided.
3) due to the selection of material and/or the contouring narrowing in comparison with the opening regions. A respective control slide and a reciprocating piston engine are also provided.
The invention relates to an adjustable-length connecting rod for a reciprocating piston engine, to a reciprocating piston engine, and to a vehicle, where an effective connecting rod length of the connecting rod can be changed, and the connecting rod has a hydraulic length adjustment device which has a hydraulic working chamber, a hydraulic duct, a valve recess with a valve recess longitudinal axis, and a valve device which is arranged in the valve recess and has a valve chamber, where the valve device is configured for opening and/or shutting of a hydraulic medium outflow from the hydraulic working chamber, and the hydraulic duct opens into the valve recess at an orifice opening in an inner wall section of the valve recess. The valve device has at least one closed outer wall section which lies opposite the orifice opening and surrounds the valve chamber of the valve device, where the outer wall section of closed configuration of the valve device configures a flow duct together with that inner wall section of the valve recess, where the flow duct is configured to divert hydraulic medium, which exits from the hydraulic duct with a first flow direction and enters into the valve recess, in a second flow direction which is different from the first flow direction before the entry into the valve chamber.
The invention relates to an adjustable-length connecting rod (1) for a reciprocating piston engine, the rod comprising a hydraulic device (2) for adjusting an effective length (L) of the connecting rod (1) with at least one hydraulic cylinder (3) and a hydraulic piston (4) arranged displaceably therein, which delimits a working chamber (5a, 5b), wherein the working chamber (5a, 5b) is sealed by at least one seal arrangement (6). The seal arrangement (6) has a sealing element (7) and at least one first and one second spring element (8a, 8b), with the first spring element (8a) exerting a force onto a first portion (7a) of the sealing element (7) such that the first portion (7a) is pressed against a piston rod (9) of the hydraulic piston (4) or against the hydraulic piston (4) and with the second spring element (8b) exerting a force onto a second portion (7b) of the sealing element (7) such that the second portion (7b) is pressed against one cylinder wall (10) of the hydraulic cylinder (3). The invention further relates to a reciprocating piston engine, a motor vehicle, a seal arrangement, and a method of production.
F02B 75/04 - Engines with variable distances between pistons at top dead-centre positions and cylinder heads
F16J 15/16 - Sealings between relatively-moving surfaces
F16J 15/3236 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
F16J 15/3212 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
A chain component of a chain for transmitting a force includes a steel-based substrate and a hard material layer on an external side of the steel-based substrate. The hard material layer contains metal nitrides and the metal carbide content in the hard material layer decreases toward the external side of the hard material layer.
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
F16G 13/18 - Chains having special overall characteristics
C23C 24/00 - Coating starting from inorganic powder
The present invention relates to a tensioning device, more particularly a hydraulically actuated chain tensioner, for a chain drive of an internal combustion engine, having a tensioner housing, a tensioning piston which is displaceably guided in a piston bore of the tensioner housing and has a piston skirt, a transport securing means for fastening the tensioning piston in the tensioner housing, a adjustment apparatus for incrementally adjusting and limiting the working range of the tensioning piston, and a final position securing means for the captive arrangement of the tensioning piston in the piston bore. The transport securing means, the adjustment apparatus and the final position securing means together have a single securing ring for fastening the tensioning piston in the tensioner housing, the incremental adjustment and limiting of the working range of the tensioning piston and the captive arrangement of the tensioning piston. The invention also relates to a chain drive, more particularly a control chain drive, of an internal combustion engine, having such a tensioning device.
The invention relates to a method for producing a metal component coated by a hard-material coating, which method comprises the method steps of preparing an anti-caking agent, adding the prepared anti-caking agent to a powder mixture, providing the powder mixture, providing the substrate made of metal, heating the powder and the substrate in a heating device, depositing a coating on the substrate, the coating having a higher hardness than the substrate, and cooling the substrate.
C23C 16/02 - Pretreatment of the material to be coated
B21L 9/02 - Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains of roller-chain or other plate-link type
B21L 15/00 - Finishing or dressing chains or chain links, e.g. removing burr material, calibrating
B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
The invention relates to a chain for a chain drive comprising alternating inner chain links and outer chain links, which are connected together in an articulated manner by means of a respective chain joint. Each outer chain link comprises two outer plates, each of which comprises two openings and two pins, and the pins and openings are connected together by means of a respective compression connection such that the pins hold the outer plates at a distance from each other. The aim of the invention is to provide a chain for a chain drive, said chain preventing the disadvantages known from the prior art and leading in particular to a higher fatigue strength. According to the invention, this is achieved in that a beveled joint is formed in the region of the compression connection between the pins and the openings in the outer plates.
The invention relates to a method for controlling the length of a sprocket chain of a chain type which comprises alternately arranged inner chain links and outer chain links that are connected together by means of a chain joint, wherein each outer chain link has two outer plates, each of which comprises two openings and two pins that are pressed into the openings of the outer plates, each pin of the outer chain links having a joint region, which contacts the inner chain link and has a joint diameter, and two joining regions, which are pressed into the openings of the outer plates and have a joining diameter. The aim of the invention is to provide such a method which prevents the disadvantages known from the prior art and in particular leads to a simple chain length control. For this purpose, the method has the following steps according to the invention: providing a pin set comprising a plurality of pins, wherein at least two of the pins of the pin set have different joint diameters in the joint regions, and for at least one of the pins of the pin set, the joint diameter of the joint region differs from the joining diameter of the joining regions; ascertaining the pin joint region diameter required for a specified chain length; selecting the pin with the ascertained joint region diameter from the pin set; pressing the joining regions of the pin into the openings in the outer plates; and completing the sprocket chain. The invention additionally relates to the use of a pin in such a method and to a pin set for such a method.
The invention relates to an assembly for producing VCR connecting rods (1) with different compression ratios. The assembly comprises a first module which has at least one connecting rod housing (16) with a piston receiving bore (15) and a second module which has at least one piston rod (9) with an adjustment piston (10) to be introduced into the piston receiving bore (15) and an upper (19) or a lower piston stop surface (20). On the basis of a specified characteristic length (LMIN, LMAX) of the VCR connecting rod (1) of the assembly, at least two variants of the second module are provided which have differently positioned upper piston stop surfaces (19) or differently positioned lower piston stop surfaces (20), whereby the number of variants can be increased in a simple manner. The invention additionally relates to a method for producing VCR connection rods (1) with different short and/or long effective connecting rod lengths and to a VCR connecting rod (1) which is produced according to the method or by using the assembly.
The present invention relates to a length-adjustable connecting rod (1) for a piston engine, wherein the connecting rod (1) comprises an adjusting device for adjusting the effective length of the length-adjustable connecting rod (1), wherein the adjusting device comprises a cylinder-piston unit (10) which has: a cylinder (12); an adjusting piston (9) which is longitudinally movably positioned in the cylinder (12) and which is connected to a piston rod (8); at least one pressure chamber (13, 14) which is formed in the cylinder (12) and which is delimited on one side by the movable adjusting piston (9); and a sealing device which is located between the outer wall of the adjusting piston (9) and the inner wall of the cylinder (12). The sealing device has at least one high-pressure sealing ring (18) which is positioned on the adjusting piston (9). A support ring nut (25) secures the high-pressure sealing ring (18) on the adjusting piston (9), wherein the support ring nut (25) defines an annular groove (27) in the outer wall of the adjusting piston (9) on at least one side, in which annular groove the high-pressure sealing ring (18) is located. The invention also relates to a piston engine comprising at least one such length-adjustable connecting rod (1).
The present invention relates to a connecting rod (1), which is variable in length and has two telescoping connecting rod portions (2, 3), wherein at least one connecting rod portion (3) has an adjusting piston (9) and a connecting rod eye (7), and the adjusting piston (9) and the connecting rod eye (7) are connected together via a piston rod (8). The present invention addresses the problem of improving the design, manufacture and function of the connecting rod portion (3) of a length-variable connecting rod (1) of the type in question. This problem is solved according to the invention in that the adjusting piston (9) and the piston rod (8) each have at least one locking element (35.1, 35.2, 36), the at least one locking element (35.1, 35.2) of the adjusting piston (9) and the at least one locking element (36) of the piston rod (8) interlock in a form-fitting manner, and at least one latching element (38) latches the locking elements (35.1, 35.2, 36) in one another.
The invention relates to a longitudinally adjustable connecting rod (10) for a reciprocating engine, in particular for a reciprocating piston internal combustion engine, comprising a first connecting rod part (11) and a second connecting rod part (12). The two connecting rod parts (11, 12) are designed to be movable towards and/or into one another, in particular telescopically, the second connecting rod part (12) has a guide cylinder (15) at its end facing the first connecting rod part (11) and the first connecting rod part (11) has a piston element (20) which is movable in the guide cylinder (15). In a region of a transmission of force from the first connecting rod part (11) to the second connecting rod part (12), at least one force transmission surface (17, 117) and at least one base surface (18, 118) are arranged in such a way that at least a part of a force flux can be transmitted from the first connecting rod part (11) to the second connecting rod part (12) via a positively engaged connection between the force transmission surface (17, 117) and the base surface (18, 118), the force transmission surface (17, 117) having a convex curvature.
The present invention relates to a longitudinally adjustable connecting rod (1) for a piston engine having a hydraulic control device (21) for adjusting the effective length of the longitudinally adjustable connecting rod (1). The hydraulic control device (21) comprises a hydraulic control valve (34) which has a control cylinder (36), a spool valve (35) and at least one drain valve (41, 42) that can be actuated by the spool valve (35), wherein the spool valve (35) comprises a control piston (37), which is displaceably guided in the control cylinder (36) and to which hydraulic control pressure can be applied, and a slide plunger (39). The spool valve (35) comprises two spool valve parts (35a, 35b) which can be separately manufactured and rigidly joined together for the intended use of the spool valve (35). Moreover, the invention relates to a spool valve (35) for the hydraulic control valve (34) of a longitudinally adjustable connecting rod (1) and to a piston engine having at least one such longitudinally adjustable connecting rod (1).
The invention relates to a length-adjustable connecting rod (100) for a reciprocating-piston machine, a method for producing a connecting rod (100) of this type, a reciprocating-piston machine, and a vehicle, an effective connecting-rod length (L) of the connecting rod (100) being changeable. The connecting rod (100) has a first connecting-rod part (102) and a second connecting-rod part (103). The first connecting-rod part (102) has a shaft (106) and a first connecting portion (107) for at least partially mounting the connecting rod (100) in a reciprocating-piston machine. The shaft (106) and the first connecting portion (107) are connected to one another by means of at least one connecting pin (160, 161; 162, 163; 164, 165).
The invention relates to a length-adjustable connecting rod (100) for a reciprocating piston engine, to a method for manufacturing such a connecting rod (100), to a reciprocating piston engine, and to a vehicle, wherein: an effective connecting rod length (L) of the connecting rod (100) can be modified and the connecting rod (100) comprises a first connecting rod part (102) and a second connecting rod part (103); the first connecting rod part (102) comprises a shaft (106) and a first connecting portion (107) for supporting at least part of the connecting rod (100) in a reciprocating piston engine; the first connecting portion (107) has a first thread (108) and the shaft (106) has a second thread (109) designed to cooperate with the first thread (108); the shaft (106) is fixedly connected to the first connecting portion (107) by means of a screw connection; and the shaft (106) and the first connecting portion (107) are fixedly connected to one another by a press-fit connection (130) in addition to the screw connection (108, 109) in at least one operating mode of the connecting rod (100).
The invention relates to an adjustable-length connecting rod for a reciprocating piston engine, in particular for a reciprocating piston internal combustion engine, to a reciprocating piston engine and to a vehicle, wherein an effective connecting rod length of the connecting rod can be varied, wherein, in order to change the effective connecting rod length, the connecting rod has a hydraulic length adjustment device, which hydraulic length adjustment device has at least one valve recess (6A, 6B, 8A, 8B) with an inner surface, has at least one valve device, and has at least one securing means (9). Here, the valve device is configured to at least partially control the length adjustment device, and at least one component of the valve device is arranged in the valve recess (6A, 6B, 8A, 8B) and is secured against falling out of the valve recess (6A, 6B, 8A, 8B) by the securing means (9), wherein the connecting rod has a recess (13) which makes an outflow of hydraulic medium from the valve recess (6A, 6B, 8A, 8B) possible, wherein the recess (13) is introduced into the securing means (9) and/or, in a region which adjoins the securing means, into the inner surface of the valve recess (6A, 6B, 8A, 8B).
A device for adjusting the effective length of a connecting rod for an internal combustion engine, includes at least one connecting rod which has a variable length and which can be locked in at least two length settings, at least one first oil pump for supplying oil to the at least one connecting rod with a variable length, and a control unit which provides for a switchover between the length settings of the connecting rod in the event of a change in the oil supply pressure for the connecting rod. The aim of the invention is to shorten the switching times during a switchover between the length settings of the connecting rod. A method for providing such a device for adjusting the effective length of a connecting rod is also provided.
A control device for a VCR connecting rod which can be operated by way of an actuation circuit is provided. Such a VCR connecting rod is to enable safe operation. For this purpose, a detection device is provided for determining a defect of the actuation circuit. Furthermore, the invention relates to a respectively associated method for operating an actuation circuit of a VCR connecting rod of an internal combustion engine.
F02B 75/04 - Engines with variable distances between pistons at top dead-centre positions and cylinder heads
F02D 41/04 - Introducing corrections for particular operating conditions
F02D 35/02 - Non-electrical control of engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
F02D 41/20 - Output circuits, e.g. for controlling currents in command coils
F02D 41/22 - Safety or indicating devices for abnormal conditions
25.
Length-adjustable connecting rod with control device
A length-adjustable connecting rod for a reciprocating piston machine, which may be a reciprocating piston internal combustion engine, is disclosed as well as a reciprocating piston machine and a vehicle. The connecting rod comprises a hydraulic length-adjusting device for adjusting an effective connecting rod length and a control device that can switch between two switching states, for controlling the length-adjusting device. The length-adjusting device comprises a hydraulic cylinder with a piston and a first hydraulic working chamber and a second hydraulic working chamber, the control device comprising a first valve and a second valve, the first valve of the control device being connected to the first hydraulic working chamber of the length-adjusting device in a fluid-communicating manner, and the second valve to the second hydraulic working chamber, the first valve and the second valve each being actuatable by means of a hydraulically actuatable adjusting piston that can axially move along an adjusting axis, the adjusting axis of the first valve being different from the adjusting axis of the second valve.
F02B 75/04 - Engines with variable distances between pistons at top dead-centre positions and cylinder heads
F02D 15/02 - Varying compression ratio by alteration or displacement of piston stroke
F16K 31/122 - Operating meansReleasing devices actuated by fluid the fluid acting on a piston
F16C 7/04 - Connecting-rods or like links pivoted at both endsConstruction of connecting-rod heads with elastic intermediate part or fluid cushion
F15B 15/12 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
The present invention relates to a length-adjustable connecting rod (1) for an internal combustion engine, wherein the connecting rod (1) has at least one switchable outlet valve (24, 25) for opening and closing a pressure chamber (11, 12), wherein the outlet valve (24, 25) has a valve body (29) and a closing body (32) operatively connected to the valve body (29), and a closing mechanism is present on the closing body (32) for directly moving the closing body (32) and indirectly moving the valve body (29) from a closed position into an open position, or vice versa. Such an outlet valve (24, 25) should be configured to be serviceable. For this purpose, the closing body (32) has a mass which is less than the volume prescribed by the enveloping contour of the closing body (32) multiplied by the density of steel (7.85 g/mm3). The invention further relates to the use of such a closing body (32) in a corresponding length-adjustable connecting rod (1).
The present invention relates to a longitudinally adjustable connecting rod (1) for a piston motor, wherein the connecting rod (1) has a first connecting-rod eye (7) for receiving a piston pin and a second connecting-rod eye (4) for receiving a crankshaft journal, wherein the distance between the piston pin and the crankshaft journal can be adjusted in the longitudinal direction (A) of the connecting rod (1) by means of a hydraulic control device (21) with a hydraulic control valve (34). The hydraulic control valve (34) has a control cylinder (36) and a control slide (35) which is guided in a slidable fashion in the control cylinder (36) and to which pressure can be applied, and at least one outlet valve (41, 42) which can be actuated by the control slide (35). In this context, the control slide (35) has a control piston (37) which is arranged on the end face and has a control pressure face (46) which can be subjected to the hydraulic control pressure and which bounds a control pressure space (38) in the control cylinder (36). Furthermore, the invention relates to the use of such a longitudinally adjustable connecting rod (1) with a hydraulic control apparatus in a piston motor, and to a corresponding piston motor.
The present invention relates to a hydraulic valve mechanism (1) for opening and closing a hydraulic line (3) which leads to a pressure chamber (28, 29), in particular for an adjustable-length connecting rod (20), with a check valve (4) and a throttling valve (5). It is the object of the present invention to provide a hydraulic valve mechanism (1) which avoids the disadvantages which are known from the prior art and, in particular, increases the stability of the adjustable-length connecting rod (20) which is known from the prior art. According to the invention, it is proposed to this end that the check valve (4) and the throttling valve (5) are connected in series and are optionally arranged in a common housing unit (6). Furthermore, the invention also relates to a connecting rod (20) with at least one hydraulic valve mechanism (1) according to the invention, and to an internal combustion engine with at least one connecting rod (20) of this type.
The present invention relates to an adjustable-length connecting rod (1) for a piston engine, wherein the connecting rod (1) has a first connecting rod eye (7) for receiving a gudgeon pin and a second connecting rod eye (4) for receiving a crankshaft journal, wherein the spacing between the gudgeon pin and the crankshaft journal can be set in the longitudinal direction (A) of the connecting rod (1) by means of a hydraulic control device (21). The hydraulic control device (21) has a control cylinder (36) and a hollow slide (35) which is guided displaceably in the control cylinder (36), can be loaded with pressure, and is configured with a hydraulic medium control slide duct (37) which extends in the longitudinal direction through the hollow slide (35). Moreover, the invention relates to the use of an adjustable-length connecting rod (1) of this type with a hydraulic control device in a piston engine, and to a corresponding piston engine.
AAAAA). The control contours each comprise a closure region (44, 49) with control cams (38, 39), and an opening region (46, 50) adjoining the control cams (38, 39). The closure region (44, 49) has a smaller cross-section than the opening region (46, 50). Owing to the material selection and/or contouring which tapers in comparison with the opening regions (46, 50), the mass of the section of the control slide (26) which lies between the two closure regions (44, 49) corresponds at maximum to 0.95 times the envelope volume of this section multiplied by the density of steel (7.85g/mm3). The invention further relates to a corresponding control slide (26) and to a reciprocating piston engine.
An assembly method for joining a telescopic rod part of a length-adjustable connecting rod, the method includes the following steps: providing a first section of the telescopic rod part, the first section comprising a connecting-rod eye and having a connection thread, providing a second section of the telescopic rod part, the second section comprising the piston rod, to which a piston is fixedly connected, and having a connection thread, wherein the second section has already arranged thereon at least sealing and/or supporting and/or closing elements, which are to be secured to the second section and which are to be mounted onto the piston rod and the piston, respectively, from the side of the associated connection thread, providing a tool for establishing a sufficiently strong frictional engagement with the piston rod and the piston, respectively, by means of form-fit clamping, establishing a sufficiently strong frictional engagement with the second section of the telescopic rod part by means of the tool, screw fastening the first section of the telescopic rod part to the second section of the telescopic rod part by means of the respective connection threads, applying the necessary tightening torque between the first section of the telescopic rod part and the second section of the telescopic rod part by means of the attached tool. In addition, the present invention relates to the use of a telescopic rod part of a VCR connecting rod in such a method.
The invention relates to an adjustable-length connecting rod for a reciprocating piston engine, to a reciprocating piston engine and to a vehicle, wherein an effective connecting rod length of the connecting rod can be changed, and the connecting rod has a hydraulic length adjustment device which has a hydraulic working chamber, a hydraulic duct (11B), a valve recess with a valve recess longitudinal axis (L2), and a valve device (14B) which is arranged in the valve recess and has a valve chamber (31B), wherein the valve device (14B) is configured for opening and/or shutting of a hydraulic medium outflow from the hydraulic working chamber, and wherein the hydraulic duct (11B) opens into the valve recess at an orifice opening in an inner wall section (27B) of the valve recess. Here, the valve device (14B) has at least one closed outer wall section (25B) which lies opposite the orifice opening and surrounds the valve chamber (31B) of the valve device (14B) at least partially, wherein the outer wall section (25B) of closed configuration of the valve device (14B) configures a flow duct together with that inner wall section (27B) of the valve recess which surrounds the orifice opening, wherein the flow duct is configured to divert hydraulic medium, which exits from the hydraulic duct (11B) with a first flow direction (S1) and enters into the valve recess, at least partially in a second flow direction (S2) which is different from the first flow direction before the entry into the valve chamber (31B) of the valve device (14B).
F16K 11/00 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid
33.
SENSOR UNIT FOR A LONGITUDINALLY ADJUSTABLE CONNECTING ROD
The invention relates to a device for a combustion engine, in particular a spark ignition engine, having a longitudinally adjustable connecting rod and a sensor unit for detecting the longitudinal adjustment of the connecting rod. The longitudinally adjustable connecting rod comprises a first connecting rod part for receiving a piston pin and a second connecting rod part for receiving a crankshaft pin, wherein the longitudinal spacing between the piston pin and the crankshaft pin is adjustable by means of the connecting rod. The sensor unit has a sensor and an index region provided on the longitudinally adjustable connecting rod, and a property of the index region which is dependent upon the longitudinal adjustment of the connecting rod can be detected by means of the sensor. The invention further relates to a combustion engine having such a device consisting of a longitudinally adjustable connecting rod and having a sensor unit and to the use of such a sensor device and to a longitudinally adjustable connecting rod.
The invention relates to a method for producing a metal component coated with a hard material layer, comprising the method steps of: preparing a release agent; adding the prepared release agent to a powder mixture; providing the powder mixture; providing the substrate made of metal; heating the powder and the substrate in a heating device; depositing a layer on the substrate, the layer having a higher hardness than the substrate; and cooling the substrate.
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
B22F 3/23 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor involving a self-propagating high-temperature synthesis or reaction sintering step
B22F 3/24 - After-treatment of workpieces or articles
The invention relates to a chain component of a chain for transmitting a force, coated with a hard material layer having a steel-based substrate and a hard material layer on an outer side of the steel-based substrate, wherein the hard material layer contains metal nitrides, and the C mass concentration in the hard material layer decreases in the direction towards the outer side of the hard material layer.
F16G 13/06 - Driving-chains with links connected by parallel driving-pins with or without rollers
F16G 13/08 - Driving-chains with links closely interposed on the joint pins
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
The invention relates to a chain component of a chain for transmitting a force, coated with a hard material layer having a steel-based substrate and a hard material layer on an outer side of the steel-based substrate, wherein the hard material layer contains metal nitrides, and the metal carbide content in the hard material layer decreases in the direction towards the outer side of the hard material layer.
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
C23C 16/30 - Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
Adjustable-length connecting rod (100, 200) for a reciprocating piston engine, in particular for a reciprocating piston internal combustion engine, having a hydraulic cylinder for adjusting an effective connecting rod length (L) of the connecting rod (100, 200), which hydraulic cylinder has at least one piston and a first hydraulic operating chamber (21) and a second hydraulic operating chamber (22), a hydraulically actuable control device (8) which can be switched over at least between two switching states with an actuating piston (23) for controlling the adjustment of the connecting rod (100, 200), and a mechanically actuable actuating device (9) for switching the control device (8), which actuating device (9) is operatively connected via at least one hydraulic actuating line (11, 12) to the actuating piston (23) of the control device (8) for actuating it hydraulically.
The invention relates to a length-adjustable connecting rod with two telescopic connecting-rod portions. One connecting-rod portion has a cylinder, in which the piston of the other connecting-rod portion engages. The cylinder is closed by a cover, through which extends the piston rod of the one connecting-rod portion. The invention provides for the connecting-rod portion to be produced in one piece with the piston and then to be broken, in order to be able to slide the cylinder cover onto the connecting rod. Thereafter, the piston rod is integrally re-joined, for example by electron-beam welding.
The invention relates to a longitudinally-adjustable connecting rod for an internal combustion engine, comprising a first connecting rod part, a second connecting rod part and at least one cylinder-piston unit for controlling the first connecting rod part relative to the second connecting rod part. The cylinder-piston unit comprises a housing with a cylinder bore, an adjusting piston that can be longitudinally moved in the cylinder bore, and at least one pressure chamber provided in the cylinder bore, and a rotation-lock device. The rotation-lock device for fixing the angular position of the piston pin to the crankshaft journal is arranged on the first connecting rod part and extends with at least one securing arm in the longitudinal direction along a guide on the second connecting rod part. The invention also relates to an internal combustion engine comprising said type of longitudinally-adjustable connecting rod and to the use of said type of cylinder-piston unit for a longitudinally-adjustable connecting rod of an internal combustion engine.
The invention relates to a longitudinally-adjustable connecting rod (6.1) for an internal combustion engine comprising a first connecting rod part (18.1), in which a first connecting-rod eye (9.1) is formed, a second connecting rod part (19.1) in which a second connecting-rod eye (8.1) is formed, and at least one cylinder-piston unit (31.1) for adjusting the first connecting rod part (18.1) relative to the second connecting rod part (19.1), the cylinder-piston unit (31.1) comprising a cylinder bore (22.1), an adjusting piston (21.1) that can be moved longitudinally in the cylinder bore (22.1), and at least one pressure chamber (24.1, 25.1) provided in the cylinder bore (22.1). The aim of the present invention is to compensate length differences, occurring during production, of the entire length of the connecting rod (6.1) which can add up to the individual part tolerances. According to the invention, an eccentric insert is arranged in a rotationally fixed manner in one of the connecting rod eyes (9.1, 8.1) such that a defined length of the connecting rod (6.1) is adjusted. The invention also relates to a method for adjusting a defined length of a connecting rod (6.1).
The invention relates to a longitudinally adjustable connecting rod for a piston engine, comprising a first connecting rod portion associated with the crankshaft and a second connecting rod portion associated with the engine piston; a cylinder is formed in one connecting rod portion, and the other connecting rod portion is equipped with a piston which is arranged so as to be able to slide in the cylinder and which delimits at least one hydraulic pressure chamber according to the position of the piston in the cylinder. According to the invention, in order for the connecting rod to be able to be brought into intermediate positions in addition to a short and a long connecting rod length, the hydraulic chambers can be blocked by one respective discharge valve such that the piston can be brought into a central position in which same delimits two hydraulic pressure chambers.
The present invention relates to a longitudinally adjustable connecting rod for an internal combustion engine, comprising a first connecting-rod eye for receiving a piston pin and a second connecting-rod eye for receiving a crankpin, the distance between the piston pin and the crankpin being adjustable by means of a hydraulic actuation circuit that can be controlled by means of a hydraulic valve mechanism. The invention further relates to an internal combustion engine comprising such a longitudinally adjustable connecting rod. The hydraulic valve mechanism comprises a control valve with a control piston that is slidably guided in a control cylinder and to which pressure can be applied at both ends, a first supply channel with a first pressure relief valve and a second supply channel with a second pressure relief valve. The first supply channel and the second supply channel open into the control cylinder at different ends of the control piston, and the first pressure relief valve and the second pressure relief valve open at different pressures. The control piston is in a first final piston position at a pressure that opens one pressure relief valve and in a second final piston position at a pressure that opens both pressure relief valves.
The invention relates to a device for adjusting the effective length of a connecting rod (6.1, 6.2, 6.3) for an internal combustion engine (1), comprising at least one connecting rod (6.1, 6.2, 6.3) which has a variable length and which can be locked in at least two length settings, at least one first oil pump (20) for supplying oil to the at least one connecting rod (6.1, 6.2, 6.3) with a variable length, and a control unit (100) which provides for a switchover between the length settings of the connecting rod (6.1, 6.2, 6.3) in the event of a change in the oil supply pressure for the connecting rod (6.1, 6.2, 6.3). The aim of the invention is to shorten the switching times during a switchover between the length settings of the connecting rod (6.1, 6.2, 6.3). According to the invention, this is achieved in that at least one second oil pump (21) is provided which can be switched on when an oil supply is required for the at least one connecting rod (6.1, 6.2, 6.3) with a variable length or which takes over the oil supply for the at least one connecting rod (6.1, 6.2, 6.3) with a variable length, and the second oil pump (21) supplies a specified delivery flow at the moment of the activation of the oil supply for the connecting rod (6.1, 6.2, 6.3) or at the moment the second oil pump takes over the oil supply for the connecting rod (6.1, 6.2, 6.3). The invention additionally relates to a method for providing such a device for adjusting the effective length of a connecting rod (6.1, 6.2, 6.3).
The present invention relates to a control device for a VCR connecting rod which can be actuated by means of an actuation circuit. The aim of the invention is to provide a VCR connecting rod of this type which ensures reliable operation. For this purpose, a detection device for determining a defect of the actuation circuit is provided. The invention further relates to a corresponding associated method for operating an actuation circuit of a VCR connecting rod of an internal combustion engine.
F02D 41/22 - Safety or indicating devices for abnormal conditions
F02B 75/04 - Engines with variable distances between pistons at top dead-centre positions and cylinder heads
F02D 15/04 - Varying compression ratio by alteration of volume of compression space without changing piston stroke
F02D 41/20 - Output circuits, e.g. for controlling currents in command coils
F02D 41/00 - Electrical control of supply of combustible mixture or its constituents
F02D 41/04 - Introducing corrections for particular operating conditions
F02D 35/02 - Non-electrical control of engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
A valve unit for a tensioning device of an endless drive is provided, in particular a chain drive of an internal combustion engine, with a carrier plate having an underside forming a contact surface and an upper side which can be faced towards a pressure chamber of the tensioning device, and a valve body which is guided in a receptacle movably relative to the carrier plate for opening and closing a valve seat of the tensioning device. Such a valve unit is to be simplified and more cost-saving. The receptacle is formed by the carrier plate and a suspension device is provided in the region of the receptacle on which the valve body is suspended from the carrier plate in a lowermost position. The carrier plate is horizontal in the non-installed state of the tensioning device, such that the valve body projects downwardly out of the receptacle and is movable upwardly by at least the opening stroke. The invention relates to a corresponding hydraulic tensioning device.
A chain drive for an internal combustion engine, comprises a driving sprocket, at least one driven sprocket, a drive chain coupling the sprockets, a pivotably supported tensioning rail which is pressed against one of the spans of the drive chain, and a slide rail which abuts on another of the spans of the drive chain, wherein the slide rail and the tensioning rail have a common base body, which is arranged such that it is pivotable about a common pivot axis, and the arcuate portion of a slide surface of the slide rail, which comes into contact with the drive chain during operation, has an axis of curvature or axes of curvature, and the arcuate portion of a slide surface of the tensioning rail, which comes into contact with the drive chain, has an axis of curvature or axes of curvature.
F16H 7/06 - Gearings for conveying rotary motion by endless flexible members with chains
F16H 7/18 - Means for guiding or supporting belts, ropes, or chains
F16H 7/08 - Means for varying tension of belts, ropes, or chains
F16F 15/26 - Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system
F02B 67/06 - Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functionsDriving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
A method is provided for producing chain link plates for a plate link chain with alternating inner chain links and outer chain links, where the contour of the chain link plates has several punch sections and two face side and rear side contact sections which, after punching out the punch sections from the sheet metal strip provided, are first connected to complementary contact sections of adjoining chain link plates and separated in a subsequent separation cut. Further provided are bush or roller chains with outer chain link plates thus produced and a corresponding chain drive for an internal combustion engine with such a bush or roller chain. The method comprises the steps of: providing a sheet metal strip, punching out the punch sections of the chain link plates from the sheet metal strip, where a further rear side contact section, in addition to the face side contact sections, is respectively connected at the head portions of the chain link plates to a complementary contact section of adjoining chain link plates, and separating the face side contact sections and the rear side contact sections of the head portions of the chain link plates by way of a substantially waste-free separation cut.
The present invention relates to a length-adjustable connecting rod for an internal combustion engine, with a first connecting-rod part, a second connecting-rod part and at least one cylinder-piston unit for adjusting the first connecting-rod part relative to the second connecting-rod part. The cylinder-piston unit comprises a housing with a cylinder bore, an adjusting piston which is movable longitudinally in the cylinder bore, and at least one first and one second pressure chamber for receiving engine oil. An oil-guiding rod is arranged on a first end side of the adjusting piston, extends through the first pressure chamber and is guided in a longitudinally movable manner in a bore in the housing in order to supply the second pressure chamber with engine oil via an oil supply channel. Furthermore, the invention relates to an internal combustion engine with such a length-adjustable connecting rod, and to the use of such a cylinder-piston unit for a length-adjustable connecting rod of an internal combustion engine.
The invention relates to an adjustable-length connecting rod for an internal combustion engine, having a first connecting rod part, a second connecting rod part, and at least one cylinder/piston unit, in order to adjust the first connecting rod part relative to the second connecting rod part, the cylinder/piston unit comprises a cylinder bore, an adjusting piston arranged such that adjusting piston can move longitudinally in the cylinder bore, at least one pressure chamber provided in the cylinder bore, and a seal device arranged between the outer wall of the adjusting piston and the inner wall of the cylinder bore. The seal device comprises at least two piston seals, which are arranged in separate piston grooves formed on the outer wall of the adjusting piston and are in sliding contact with the inner wall of the cylinder bore. The invention further relates to an internal combustion engine having such an adjustable-length connecting rod and to the use of a cylinder/piston unit for an adjustable-length connecting rod of an internal combustion engine.
The invention relates to an adjustable-length connecting rod for an internal combustion engine, having a first connecting rod part, a second connecting rod part, and at least one cylinder/piston unit, in order to adjust the first connecting rod part relative to the second connecting rod part. The cylinder/piston unit comprises a housing, a cylinder bore, an adjusting piston that can be moved longitudinally in the cylinder bore, and at least a first and a second pressure chamber for holding motor oil. Arranged in a housing bore in the housing of the cylinder/piston unit is a cylinder sleeve, wherein the cylinder sleeve forms the cylinder bore and at least one oil feed channel runs along the cylinder sleeve in order to supply the second pressure chamber with motor oil. The invention further relates to an internal combustion engine having such an adjustable-length connecting rod and to the use of such a cylinder/piston unit for an adjustable-length connecting rod of an internal combustion engine.
The invention relates to a length-adjustable connecting rod for an internal combustion engine, in particular a spark-ignition engine, comprising a first connecting rod part and a second connecting rod part, wherein the first connecting rod part can be moved relative to the second connecting rod part, and comprising at least one cylinder-piston unit in order to adjust the first connecting rod part relative to the second connecting rod part. The cylinder-piston unit comprises at least one cylinder bore, an adjustment piston arranged for longitudinal movement in the cylinder bore, a piston rod, and at least one first pressure chamber provided in the cylinder bore for holding engine oil, which pressure chamber is bounded on one side by an end face of the movable adjustment piston. The problem addressed by the invention is that of providing a length-adjustable connecting rod that can be used in the greatly limited installation space and that has the required long service life. For this purpose, according to the invention, the adjustment piston is stepped and has at least two further end surfaces such that at least two further pressure chambers are formed. The invention further relates to the use of such a connecting rod in an internal combustion engine and to an internal combustion engine having such a length-adjustable connecting rod.
A length-adjustable connecting rod for an internal combustion engine, comprises a first connecting rod member, a second connecting rod member and at least one cylinder-piston assembly for adjusting the first connecting rod member relative to the second connecting rod member. The cylinder-piston assembly can be actuated by way of a hydraulic adjustment mechanism, where the hydraulic adjustment mechanism comprises at least one oil filter in order to filter the engine oil of the internal combustion engine flowing into the cylinder-piston assembly. The invention further relates to an internal combustion engine with such a length-adjustable connecting rod and the use of such a cylinder-piston assembly for a length-adjustable connecting rod of an internal combustion engine.
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
42 - Scientific, technological and industrial services, research and design
Goods & Services
Drive chains and parts therefor (other than for land
vehicles); internal combustion engines (other than for land
vehicles); clutches and apparatus for power transmission
(other than for land vehicles); connecting rods (internal
combustion engine parts). Computer programs, software and control programs for the
operation and testing of internal combustion engines;
computer programs, software and control programs for the
evaluation and development of engine, drive gears,
transmission topologies, vehicles and operational
strategies; computer programs, software and control programs
for the assistance of the test engineer during the
performance of the calibration of the engines and vehicles;
computer programs, software and control programs for the
automated delineation of test runs; computer programs,
software and control programs for the automated delineation
of test sequences for drive chain and/or engine behavior;
monitoring apparatus and instruments for the operating state
of internal combustion engines; monitoring apparatus and
instruments for the controlling combustion engines. Drive chains and parts therefor for vehicles; clutches,
shifting clutches and apparatus for power transmission for
land vehicles; internal combustion engines for land vehicle
and parts thereof. Scientific and technological services and research work and
design services related hereto in the field of development
of engines and vehicles; scientific and technological
services and research work and design services related
hereto in the field of the assessment and inspection of
vehicles and their components; industrial analysis and
research services; vehicle development; development of
components of internal combustion engines; creation and
development of computer programs, software and control
programs for the assistance of the test engineer during the
performance of the calibration of engines and vehicles;
creation and development of computer programs, software and
control programs for the automated delineation of test runs;
creation and development of computer programs, software and
control programs for the automated delineation of test
sequences for drive chain and/or engine behavior.
54.
CONNECTING ROD HAVING AN ADJUSTABLE CONNECTING ROD LENGTH WITH A MECHANICAL ACTUATING MEANS
Adjustable-length connecting rod (100, 200) for a reciprocating piston engine, in particular for a reciprocating piston internal combustion engine, having a hydraulic cylinder for adjusting an effective connecting rod length (L) of the connecting rod (100, 200), which hydraulic cylinder has at least one piston and a first hydraulic operating chamber (21) and a second hydraulic operating chamber (22), a hydraulically actuable control device (8) which can be switched over at least between two switching states with an actuating piston (23) for controlling the adjustment of the connecting rod (100, 200), and a mechanically actuable actuating device (9) for switching the control device (8), which actuating device (9) is operatively connected via at least one hydraulic actuating line (11, 12) to the actuating piston (23) of the control device (8) for actuating it hydraulically.
The present invention relates to a method for producing a toothed link plate for a toothed chain, having the following steps of: providing a sheet-metal material having a thickness which corresponds to at least 0.3 times the width of the toothed chain or at least 4 mm, carrying out adiabatic punching of at least one functional surface of the external and/or internal contour of the at least one toothed link plate out of the sheet-metal material at a punching die speed of at least 8 m/s, preferably about 10 m/s, subsequently carrying out high-speed shaving of at least one functional surface of the external and internal contour of the at least one toothed link plate at a shaving die speed of at least 8 m/s, preferably about 10 m/s, and separating the at least one toothed link plate from one another and/or from the rest of the sheet-metal material. The invention also relates to a toothed chain using such a toothed link plate and to a corresponding chain drive.
A chain drive for an internal combustion engine comprises a driving sprocket and at least one driven sprocket, a drive chain coupling the sprockets to each other, and at least one guide rail and/or one tensioning rail for guiding and/or tensioning the drive chain. At least the guide rail and/or the tensioning rail comprises at least two slide elements, arranged at a non-guided distance from one another for contacting the drive chain, such that at least two slide elements are arranged in at least one span of the chain drive. In at least one span, the ratio of guided chain length to non-guided chain length is smaller than 1. Such a chain drive is to be improved with respect to its vibration characteristics. To this end, the sum of the two non-guided lengths of the drive chain between a slide element and the respective nearest sprocket is, in at least one span, which is in contact with a guide rail and/or a tensioning rail with at least two slide elements arranged at a non-guided distance from one another, smaller than 0.5 times the total length of the respective span.
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Drive chains and component parts therefor, other than for land vehicles; internal combustion engines other than for land vehicles; clutches and apparatus for power transmission other than for land vehicles; internal combustion engine parts, namely, connecting rods Monitoring apparatus and instruments for the operating state of internal combustion engines; monitoring apparatus and instruments for the controlling of combustion engines Drive chains for land vehicles and component parts therefor; clutches, shifting clutches and apparatus for power transmission for land vehicles; internal combustion engines for land vehicles and component parts thereof
58.
Chain drive assembly with tensioning-rail mounting aid
A chain drive assembly for an internal combustion engine comprises a tensioning rail supportable on an engine block so as to be pivotable about a pivot bearing axle and further comprises a pivot bearing that can be provided on the engine block. The tensioning rail having a projection, which protrudes from the tensioning rail relative to the support body, so as to hold, at least during mounting, the tensioning rail at a mounting position. Additionally, the invention relates to the use of such a tensioning rail for mounting on the engine block of an internal combustion engine as well as to a bipartite chain drive of an internal combustion engine and a suitable mounting method.
The present invention relates to a chain drive for an internal combustion engine having a drive chain wheel, at least one driven chain wheel, a drive chain coupling the chain wheels, a pivotally mounted tensioning rail which is pressed against one of the strands of the drive chain, and a sliding rail which abuts another of the strands of the drive chain, wherein the tensioning rail and the sliding rail have a common base body which is mounted such that it can pivot about a common pivot axis, and the arcuate portion of a sliding surface of the sliding rail which comes into contact with the drive chain during operation has an axis of curvature or axes of curvature, and the arcuate portion of a sliding surface of the tensioning rail which comes into contact with the drive chain during operation has an axis of curvature or axes of curvature, and the distance of the axis of curvature which is associated with the sliding rail or the average distance of the axes of curvature which are associated with the sliding rail to the pivot axis of the base body is smaller than the distance of the axis of curvature which is associated with the tensioning rail or the average distance of the axes of curvature which are associated with the tensioning rail to the pivot axis of the base body, wherein the distance of the axis of curvature which is associated with the sliding rail or the average distance of the axes of curvature which are associated with the sliding rail to the pivot axis of the base body is smaller than 6 times, preferably smaller than 4.5 times, the chain pitch of the drive chain. The invention also relates to a combination rail which is appropriate for use with this chain drive.
A guide rail or a tensioning rail for a chain drive of an internal combustion engine, comprises two separate sliding elements associated with the same span of the chain drive and arranged on a support, the sliding elements having a sliding surface that exhibits a convex curvature in the direction of movement of the chain. This kind of rail is to be improved with respect to its producibility and its tensioning and guiding effect. The angle bisectors of the two opening angles of the two convex sliding surfaces extend relative to each other at an angle other than 0°, the sliding elements being attached to the support as separate modular components. Kits for a guide rail and a tensioning rail as well as a chain drive are provided.
The invention relates to an autonomous clamping device, in particular for a drive chain of an internal combustion engine, comprising a housing and a clamping piston which is guided in a movable manner in a piston bore of the housing. A high-pressure chamber and a low-pressure chamber for a hydraulic fluid are formed in the piston bore, and the clamping piston separates the high-pressure chamber from the low-pressure chamber. The clamping piston is equipped with a piston rod which extends outwards from the clamping piston through the low-pressure chamber. A hydraulic fluid reservoir with a volume-equalizing device and a damping device for the retracting movement of the clamping piston into the piston bore are also provided.
An articulated chain comprises alternate inner and outer chain links interconnected by a chain joint. Each inner chain link comprises at least one chain link plate and each outer chain link comprises at least two chain link plates, and the chain link plates have a structured link plate back that is adapted to be brought into contact with a tensioning or guide rail. The structured link plate back comprises at least one recess having a closed circumference or at least one recess having a circumference that is closed with the exception of an access opening, and is straight or slightly concave in shape for contact with a tensioning or guide rail. A chain drive comprising a driving sprocket, at least one driven sprocket, and at least one tensioning or guide rail and an articulated chain, in contact with the at least one tensioning or guide rail is provided.
A tensioning rail for an endless drive means, in particular for a chain drive of an internal combustion engine, comprises a support body and a sliding body arranged on the support body and having a sliding surface for contacting the endless drive means as well as at least one lubricant opening for wetting the sliding surface with lubricant. A press-on area provided on the support body and used for contacting a tensioning device has an inflow opening for the lubricant. A feed passage extending from the inflow opening through the support body and a lubricant passage extending in the longitudinal direction of the support body allow the supply of lubricant to the at least one lubricant opening.
A tensioning rail for a drive chain, in particular for a chain drive of an internal combustion engine, comprises a basic body and a spring unit, the basic body including a sliding surface for contact with the drive chain and a press-on surface. The spring unit comprises a tensioning end arranged on the press-on surface and a support end supportable on a counter bearing, a wear protection element being provided, which is arranged at the support end of the spring unit. In addition, the invention relates to a chain drive including such a tensioning rail as well as to the use of such a tensioning rail for a chain drive of an internal combustion engine.
A tensioning or guide rail for a chain drive, in particular for a chain drive of an internal combustion engine, comprises two spaced-apart contact sections and one non-contact section arranged therebetween, the contact sections each having a sliding surface which is adapted to be brought into contact with a chain, and the non-contact section interconnecting the two contact sections as a support structure. Such a rail is to be configured such that the installation space available can be utilized more advantageously. To this end, the support structure of the non-contact section comprises an opening extending continuously from a front to a rear of the tensioning or guide rail and separating the contact sections provided with the sliding surfaces. The invention also relates to an endless drive of the type in question.
A tensioning or guide rail for a drive chain, in particular for a chain drive of an internal combustion engine, comprises a carrier body with at least two chain guide sections and with at least one recessed section. The at least one recessed section is arranged between two chain guide sections and recessed relative to a tangent connecting the adjoining chain guide sections, the at least two chain guide sections having each a sliding-contact surface for contacting the drive chain. A continuous sliding body is arranged on the carrier body along the at least two chain guide sections and the at least one recessed section, the sliding body defining the sliding-contact surfaces of the at least two chain guide sections and a surface of the at least one recessed section, the surface facing the drive chain.
The invention relates to a chain drive for an internal combustion engine, comprising an input sprocket and at least one output sprocket, a drive chain coupling the sprockets to each other, and at least one guiding and/or one tensioning rail for guiding and/or for tensioning the drive chain. At least the guiding and/or the tensioning rail has at least two sliding elements arranged at an unguided distance from each other for contacting the drive chain, in such a way that at least two sliding elements are arranged in at least one run of the chain drive. At least in one run, the ratio of the guided chain length to the unguided chain length is less than 1. Such a chain drive should be improved with regard to the vibration characteristics thereof. For this purpose, at least in a run that is contacted by a guiding and/or a tensioning rail having at least two sliding elements arranged at an unguided distance from each other, the sum of the two unguided lengths of the drive chain between a sliding element and the nearest sprocket is less than 0.5 times the total length of the corresponding run.
A tensioning rail for an endless drive, in particular a timing chain drive of an internal combustion engine, comprises a sliding lining body and a reinforcement body inserted in the sliding lining body and connected thereto by a detent connection, the sliding lining body comprising a slide rail for contact with an endless drive and a press-on region for the tensioning piston of a tensioning device. The tensioning rail is characterized in that the press-on region is arranged in a resiliently movable fashion on the slide rail and comprises a detent device as a constituent part of the detent connection such that the detent device is adapted to be locked due to the resilient movement of the press-on region. An endless drive having a tensioning rail of the type disclosed is also provided.
A tensioner, for a camshaft-camshaft chain drive with a drive chain and camshaft bearing bridge for fastening camshaft bearings to an engine block, comprises a tensioner housing with a guiding-side guide shoe, a tensioning piston slidably guided in a piston bore of the tensioner housing and provided with a tensioning-side tensioning shoe, and a fastening flange projecting laterally from the tensioner housing and having a mounting surface facing the tensioning side. A mounting plane defined by the mounting surface of the fastening flange intersects the tensioner housing at an axial distance from the guiding surface of the guide shoe at most 40% of axial transport length of the tensioner between the guiding surface of the guide shoe and the tensioning surface of the tensioning shoe. The camshaft bearing bridge has a contact surface for the fastening flange, to be in contact with the mounting surface of the fastening flange. A camshaft-camshaft chain drive for an internal combustion engine comprising such a tensioner is provided, where the camshaft bearing bridge can be attached to an engine block component.
A tensioning or guide rail and a method of producing a tensioning or guide rail for an endless drive means are provided, in particular for a chain drive in an internal combustion engine, comprising a supporting body and a sliding body of plastic material arranged on the supporting body. The method comprises the steps of producing a sliding body profile strand and separating the individual sliding body from the sliding body profile strand. The sliding body of a tensioning or guide rail is a segment of such a sliding body profile strand, the plastic material being oriented in a longitudinal direction.
2 emission of the associated internal combustion engine, the chain being stable and easy to produce. This is achieved in that the bush is configured as a straight circular cylinder in which the through-passage is arranged in the bush eccentrically with respect to the longitudinal axis of the bush.
An articulated chain having alternating inner and outer chain links connected by hinge, having a running direction, each inner link comprising a link plate and each outer link comprising two link plates and two hinge pins interconnecting, each hinge pin rotationally fixed in an opening of the associated outer link plates and extending through an opening of the associated inner link to form a chain hinge, the links having plate backs for contact with a tensioning or guide rail. The link plate back comprises a leading area viewed in the running direction and an adjoining trailing area, the leading area extending substantially parallel to a plane projected between center lines of pin openings and hinge openings, respectively, and the trailing area extending from a part of the link plates at an angle to the plane projected between the center lines, the vertex of the angle pointing in the running direction.
The present invention relates to a tensioning or guide rail for a flexible drive, in particular a chain drive of an internal combustion engine, comprising a support body and a sliding lining body, which is attached to the support body and which has a sliding surface for contacting a flexible drive means. Furthermore, the sliding lining body has a fastening opening extending from a rear face supported on the support body to the sliding surface, in which fastening opening a fastening bolt connected to the support body in a force-closed or integrally bonded manner is arranged and the fastening bolt has an enlarged formed head produced by means of a riveting process, for securing the sliding lining body on the support body.
In the field of a slide rail for tensioning and guiding an endless drive member, comprising at least one bore and a screw captively held in the bore, permitting the captive mounting of screws even in thin-walled slide rails is provided. A sleeve is mounted in the bore and the sleeve comprises engagement elements at its end facing the rail, said engagement elements being engaged with the wall of the bore, and a stop collar lying against a stop surface formed at the slide rail, and lock elements are embodied in the sleeve which engage the thread of the screw and lock the screw at least in an assembly position, wherein said slide rail is thin-walled. Furthermore, an assembly method is provided for manufacturing the slide rail with a captively held screw and to the loss prevention device per se.
F16B 21/18 - Means without screw-thread for preventing relative axial movement of a pin, spigot, shaft, or the like and a member surrounding itStud-and-socket releasable fastenings without screw-thread by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devicesMeans without screw-thread for preventing relative axial movement of a pin, spigot, shaft, or the like and a member surrounding itStud-and-socket releasable fastenings without screw-thread by separate parts with grooves or notches in the pin or shaft Details
F16H 7/08 - Means for varying tension of belts, ropes, or chains
F16H 7/18 - Means for guiding or supporting belts, ropes, or chains
75.
TENSIONING RAIL WITH RESILIENT PRESSURE-EXERTION REGION
The present invention relates to a tensioning rail for an endless drive, in particular timing chain drive of an internal combustion engine, having a sliding lining body and having a reinforcement body which is inserted into the sliding lining body and which is connected to the latter by way of a detent connection, wherein the sliding lining body has a slide rail for abutment against an endless drive means and a pressure-exertion region for the tensioning piston of a tensioning device. The tensioning rail is characterized in that the pressure-exertion region is arranged in resiliently movable fashion on the slide rail and has a detent device as a constituent part of the detent connection, such that the detent device can be locked with detent action owing to the resilient movement of the pressure-exertion region. The invention also relates to an endless drive having a tensioning rail of said type.
A method for producing a tensioning or guide rail with a base body, and a vibration absorber arranged on the base body is provided, comprising the steps of: providing a base body, at least partially embedding the base body into plastic material that is in a flowable state, and hardening the plastic material to obtain a vibration absorber that is captively arranged on the base body. The method also relates to a respective rail and to a continuous drive for a combustion engine.
F16H 7/08 - Means for varying tension of belts, ropes, or chains
F16H 7/18 - Means for guiding or supporting belts, ropes, or chains
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
77.
FRICTION- AND WEAR-REDUCING JOINT FOR A BUSH CHAIN OR ROLLER CHAIN
The invention relates to a rocker joint for a bush chain or roller chain, comprising a bush which has a through-channel running along the bush longitudinal axis, a first rocker surface being formed in said through-channel. The rocker joint also comprises a pin which is arranged in the through-channel of the bush and on which a second rocker surface is formed. Furthermore, the invention also relates to a chain with outer chain links and inner chain links, which are offset relative to the outer chain links, said outer chain links and inner chain links being connected to one another by means of rocker joints, each of which comprises a bush and a pin. The aim of the invention is to provide a friction-reducing joint or a chain with reduced friction and less wear, and thus a reduced CO2 emission of the corresponding internal combustion engine, wherein the chain can be produced in a stable and simple manner. According to the invention, this is achieved in that the bush is designed as a straight circular cylinder in which the through-channel is arranged in the bush eccentrically to the longitudinal axis of the bush.
The invention relates to a method for producing a tensioning or guide rail for an endless drive means, in particular for a chain drive in an internal combustion engine, having a supporting body, and a sliding lining body of synthetic material arranged on the supporting body. The method comprises producing a sliding lining profile strand and separating the individual sliding lining body from the sliding lining profile strand. The sliding lining body of a tensioning or guide rail according to the invention is a segment of such a sliding lining profile strand, wherein the synthetic material is oriented in a longitudinal direction.
F16H 7/18 - Means for guiding or supporting belts, ropes, or chains
B23P 13/04 - Making metal objects by operations essentially involving machining but not covered by a single other subclass involving slicing of profiled material
The invention relates to an epicyclic gearing, particularly to a planetary gearing, having at least two central wheels and at least one planet wheel, whereby the at least one planet wheel engages simultaneously with two central wheels in order to transmit a movement of the one central wheel to the other central wheel. The at least two central wheels are thereby formed as lantern elements and the at least one planet wheel is formed as a lantern wheel. Alternatively, the at least one planet wheel is formed as a lantern element and the at least two central wheels are formed as lantern wheels.
The invention shows a transfer device (Fg.3d) with variable rotation angle having an internally toothed ring gear (12), an externally toothed sun gear (17), a transmitter element (chain 13) and an adjustable actuation device (chain scraper 14, 15), wherein the transmitter element comprises a circumferential engagement device (chain 13) arranged between the ring gear (12) and sun gear (17). The actuation device comprises an activation element (chain scraper 14, 15) that can be moved along the engagement device for rotation angle adjustment. In this case, the circumferential engagement device is partially engaged with the internal toothing of the ring gear and partially engaged with the external toothing of the sun gear by means of the activation element. Moreover, the invention relates to a correspondingly designed camphaser (Fig.8) of a combustion engine, and a method for adjusting the relative rotation angle position of the camshaft (3) (via a sproket 34) to the crankshaft in a combustion engine.
F16H 35/00 - Gearings or mechanisms with other special functional features
F01L 1/344 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
F01L 1/352 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
A method for producing high-performance chain link plates with a link plate pitch T, comprises: clocked feeding of a sheet metal band with a feed length V per cycle, pre-punching at least two chain link plate blanks arranged in succession, re-cutting at least one chain link plate blank, wherein at least the still connected head areas of the chain link plate blanks arranged in succession are excepted from the re-cutting process separating the connected head areas of chain link plate blanks arranged in succession, wherein the feed length V is smaller than 2.1×T and the upper and/or lower side of the head areas connected to each other is/are provided at least partially with a concave run by a punching process substantially adjacent to the end face produced later. A method is also provided for producing a high-performance chain and to correspondingly produced high-performance link plates and high-performance chain.
The invention relates to a transmission unit (130) for coupling a crankshaft (150) of a motor-vehicle engine (220) to a vehicle-auxiliaries drive system (100), wherein the transmission unit (130) has a shiftable planetary gear mechanism for transmitting a force or a torque between the vehicle-auxiliaries drive system (100) and the crankshaft (150). Here, an internal gear (210) of the planetary gear mechanism is mounted axially displaceably and can be arranged in at least three different axial positions (230a, 230b, 230c), wherein each of the at least three different axial positions (230a, 230b, 230c) of the internal gear (210) in each case defines a different operating state of the transmission unit (130). The first and second axial positions (230a), (230c) define two different transmission ratios for a two-way transmission of a rotational movement between the vehicle-auxiliaries drive system (100) and the crankshaft (150), and the third position (230b) defines a free-wheel of the transmission unit (130). Furthermore, the invention relates to a method for operating a transmission unit (130) of this type and to a corresponding control unit and to a computer program.
F02B 67/06 - Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functionsDriving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
A link chain is made of chain links connected by chain joints, a chain joint comprising at least one bearing and a pin guided in a pivotable manner and in contact with this chain joint bearing. At least one bearing surface of the pin or chain joint bearing has a hard material layer applied by a PVD process, formed from a compound including at least two metals and a non-metal, at least C, N or Si being selected as the non-metal and the two metals being selected from Cr, Mo, W, Ti, Cu, Zn, Zr, Ta, Nb, Al, B, V, Hf, whereby the two metals differ from each other and the first metal is present in the hard material layer in a crystal structure that differs from the crystal structure of the second metal.
The invention relates to a tensioning device (8) for an endless drive element, in particular a timing chain (5) of an internal combustion engine, comprising a housing (10), a tensioning piston (11) which can be movably guided in the housing (10), and a pressure chamber (19) for a hydraulic fluid, formed between the housing (10) and the tensioning piston (11), wherein the tensioning piston (11) has a ventilation opening (15) and a ventilation channel (23, 16.1, 16.2, 16.3, 22.1, 22.2, 22.3) is provided which is disposed between the pressure chamber (19) and the ventilation opening (15) and which is formed by the assembly of at least two ventilation elements. In one ventilation element, in the surface (E) which contacts the second ventilation element, sub-regions of the ventilation channel which are separated from one another are formed by indented groove sections (16.1, 16.2, 16.3, 22.1, 22.2, 22.3), which are connected to one another by transitional grooves (22.1, 22.2, 22.3) formed in the second ventilation element in the surface which contacts the first ventilation element in such a way that a main part of the flow cross-section of the ventilation channel is disposed with some sections on one side and some sections on the other side of a plane spanned by the contact surfaces. The invention further relates to a corresponding traction drive (1) having such a tensioning device (8).
A tensioning device for a flexible drive means, such as a chain or a belt, includes a housing, a tensioning piston movably arranged in the housing and provided with a hollow space, a pressure chamber for hydraulic fluid arranged between the housing and the tensioning piston, a vent opening arranged in the tensioning piston, and a damping means in flow communication with the vent opening and with the pressure chamber. A packing element is arranged in the hollow space of the tensioning piston and is at least a component of the damping means, such that the damping means comprises a capacity for hydraulic fluid which corresponds to at least 30% of the volume of the pressure chamber added in a 1 mm stroke of the tensioning piston in the extension direction. The device relates to a series of tensioning devices as well as a transmission and a series of transmissions.
A tensioning apparatus or device for a flexible driving means, particularly a drive chain for an internal combustion engine, comprises a housing, a tensioning piston movably guided in said housing and an adjusting or regulating means for gradually adjusting the working stroke of the tensioning piston. The adjusting means comprises a locking bracket and an appertaining locking profile at the tensioning piston, two arch-shaped clamping sections of said locking bracket being engageable with said locking profile, and a resilient spring portion with a torsional area combining the clamping sections in spring-resilient manner. In a preferred embodiment, the locking bracket comprises a U-shaped section with a portion angled towards the housing wall and forming the torsional area. The housing is further provided with a guide projection projecting from said housing wall for axially guiding said angled portion of said U-shaped section of said locking bracket in the working stroke of said tensioning piston in torsion-proof manner.
The invention relates to a method for producing link plates (1, 10). The link plates (1, 10) are first stamped from a metal sheet in a re-cutting or fine stamping method, and at least one cut surface of the stamped link plates is subsequently treated with a chemical agent that acts on the cut surface in an abrasive manner. The cut surface (14) of the stamped link plate is exposed to the chemical agent for a limited period. Material on the surface of the cut surface is removed, and the cut surface is polished by means of the chemical agent.
The present invention relates to a tensioning system with restoring action for tensioning a flexible drive means, in particular a drive chain of an internal combustion engine, composed of a tensioning device and a restoring device. The tensioning device comprises a housing, a tensioning piston which is guided in a movable manner in the housing and which has a detent profiling and a detent hook for the stepped adjustment of the working range of the tensioning piston, wherein the detent hook has a clamping region for engaging into the detent profiling in the tensioning piston. Here, a retraction stop is provided on the housing, at which retraction stop, in an abutting state of the detent hook, a further retraction movement of the clamping piston into the housing is prevented by virtue of the clamping region being clamped on the detent profiling. The restoring device has a restoring element which is separate from the clamping device and which is received in a restoring receptacle of the tensioning device and which prevents the abutment of the detent hook against the retraction stop and which, in the event of abutment of the detent hook against the restoring element and a further retraction movement of the tensioning piston, causes the clamping region to spread open and permits a restoring movement of the tensioning piston. The present invention also relates to a corresponding tensioning device having a restoring receptacle for receiving the restoring element.
The invention relates to an articulated chain (1), in particular a drive chain of an internal combustion engine, comprising chain links (2, 3), which are connected to each other by a chain hinge (4). Each of the inner and outer chain links (3, 2), which are preferably arranged in an alternating manner, have at least two link plates (6, 7) which lie parallel to each other and each of which has two hinge openings (12). In order to form a chain hinge, a hinge pin (5) extends through each of the hinge openings of the link plates. According to the invention, the link plates are made of boron-manganese steel.
The present invention relates to a sprocket (1) with a circular gear ring (3) comprising a plurality of alternating teeth (4) and tooth spaces (5) with different pitch spacings (T) distributed around the periphery of the gear ring (3), a plurality of successive pitch spacings (T) increasing continuously over a first region of the gear ring (3), and a plurality of successive pitch spacings (T) decreasing continuously in a subsequent region. The invention additionally relates to a chain drive (20), in particular a timing chain drive, comprising a driving chain (14) and at least one sprocket (1) of the type in question.
The invention relates to a guide track for a drive chain, in particular in an internal combustion engine, with a support body, at least one sliding liner body in contact with the drive chain and a tensioner housing, wherein the sliding liner body has a positive fir connection to the support body. The support body, the sliding liner body and the tensioner housing are designed as separate components, the support body being a sheet support. The invention further relates to a chain drive, in particular for an internal combustion engine, with a drive chain, at least two chain wheels, said guide track, and a tensioning track and tensioning device, wherein the tensioning device is at least partly housed in the tensioner housing of the guide track, is supported against the guide track and presses the tensioner track against the drive chain.
The invention relates to a tensioner assembly for a traction medium drive, specifically a chain drive, with at least two traction medium wheels and a flexible traction medium, comprising a tensioning rail which can be pressed against the traction medium by means of a tensioning device, wherein the tensioning rail is applied against at least one sliding guide and can be displaced along the at least one sliding guide by means of the tensioning device.
The present invention relates to a tensioning rail for a chain drive, in particular a timing chain drive of an internal combustion engine, comprising a base body (11) and a pressure body (1) connected to the base body which provides a pressing area (2) for pressing a chain tensioner, wherein a pressing surface (4) of the pressure body (1) which faces the chain tensioner during use is formed with a channel device (5). The invention also relates to a tensioning device for an endless drive element, in particular a timing chain of an internal combustion engine, comprising a tensioning rail which can be pushed on the endless drive element having a base body (11) and a pressure body (1) which can be connected to the base body (11) and which provides a pressing area, and having a chain tensioner which presses on the pressing area (2) of the pressure body (1).
The invention relates to a tensioning rail for a chain drive with a support body which is pivotable about a center of rotation and which has a guide channel, which can be placed in contact with a chain, and a pressing region which can be acted on with pressure by a tensioning piston, wherein the pressing region bridges the guide channel at least in regions by forming a peripherally closed guide channel section, wherein the pressing region is formed in one piece with the support body.
The present invention relates to a chain drive module, comprising at least one chain wheel, a base body laterally covering the at least one chain wheel at least in regions, a chain guided around the at least one chain wheel, and a tension or glide rail resting against the chain and disposed on the base body, wherein the tension or glide rail comprises at least one extension, which laterally covers the at least one chain wheel and secures the at least one chain wheel at least in a transport and handling position.
The present invention relates to a tensioning apparatus (1), in particular for a timing chain of an internal combustion engine, having a housing (2), having a tensioning piston (3) which is guided in a piston bore (4) of the housing, and having a blocking device for limiting the retraction movement of the tensioning piston into the piston bore of the housing. The blocking device has a locking ring (24) which is arranged on the tensioning piston. The blocking device also has a separate, reversibly radially expandable blocking sleeve (21) which is arranged on a tensioning end of the housing for inserting the locking ring into the blocking device in the retraction direction of the tensioning piston, and for holding the locking ring in the blocking device in the tensioning direction of the tensioning piston.
The present invention relates to a tensioning device for an endless drive such as a chain drive on an internal combustion engine, having a housing, having a tensioning piston which is guided in a movable manner in the housing, having a spring element which acts between the housing and the tensioning piston, and having an adjusting device for the stepped adjustment of the working range of the tensioning piston, wherein the housing has a locking projection and the spring ring element is designed, and rotatable about a longitudinal axis of the tensioning piston, in such a way that said spring ring element can be moved from the transport securing position, in which a section of the spring ring element is blocked by the locking projection, into the working position, in which the section of the spring ring element together with the tensioning piston is released from the locking projection.
The present invention relates to a hydraulic tensioning device (1) for a flexible drive means, having a housing (2) and having a tensioning piston (4) which is guided in a piston bore (3) of the housing. Formed between the housing and the tensioning piston is a pressure space (6), having a ventilation device (15) for ventilating the pressure space, wherein the ventilation device has a ventilation valve (18). Also provided is a separate pressure-exerting means (22) which is arranged in the head region of the tensioning piston for transmitting the tensioning force to the drive means. The pressure-exerting means has a pressure piece (23) and a valve body (21) which is formed as a constituent part of the ventilation valve, wherein the pressure piece is arranged so as to be movable with respect to the tensioning piston, and the valve body is arranged between the pressure piece and the tensioning piston and, as a force transmitting means between the tensioning piston and the pressure-exerting means, is in direct contact with the tensioning piston.
The invention relates to a tensioning device (1) for drives with endless driving means, in particular a drive with a drive chain of an internal combustion engine. The tensioning device (1) has a housing (2), a tensioning piston (4) movably guided in the housing, a pressure chamber (10) for hydraulic liquid formed between the housing and the tensioning piston, and a pressure chamber inlet with a non-return valve that has a disk-shaped valve body and a valve housing with a main valve axis. The valve housing comprises a pot-shaped base part with an opening and a cover part that is plugged into the opening, and the plugged section of the cover part has a guide recess for the disk-shaped valve body movable along the main valve axis. At least in the closed state of the valve, the guide recess in the cover part receives the disk-shaped valve body only partially in the axial direction. The cover part comprises a front discharge surface transverse to the main valve axis and also at least one discharge recess next to a central displacement and closure opening for the hydraulic liquid to be discharged through the discharge recess along the front discharge surface.
