A compressor housing for a turbocharger dividably composed of a plurality of pieces including a scroll piece and a shroud piece. The scroll piece and the shroud piece are assembled to each other by press-fitting a press-fitting portion of the shroud piece into a press-fitted portion of the scroll piece in an axial direction. A pressure-contacting portion provided on either one of the scroll piece and the shroud piece is pressure-contacted with a pressure-contacted portion provided on the other one of the scroll piece and the shroud piece in the axial direction to thereby cause plastic flow to both portions, so that a plastic flow portion is annularly formed. Thus, the scroll piece and the shroud piece are sealed to each other.
A compressor housing for a turbocharger dividably composed of a plurality of pieces including a scroll piece, and a shroud piece. The scroll piece and the shroud piece are assembled to each other by press-fitting a press-fitting portion of the shroud piece into a press-fitted portion of the scroll piece. Pressure-contacting portions that are provided on either one of the scroll piece and the shroud piece are pressure-contacted with pressure-contacted portions that are provided on the other one of the scroll piece and the shroud piece, respectively. As a result, the pressure-contacting portions plastically flow to form seal parts for sealing the scroll piece and the shroud piece, respectively.
In a tappet with a built-in lash adjuster, hydraulic oil is prevented from leaking from a low pressure chamber during a long-period stop.
A tappet (10) includes a hydraulic lash adjuster (11) which supports a lower end portion of a push rod (96) and a tappet case (12) to which the lash adjuster (11) is internally fitted and which is reciprocally displaced in a vertical direction according to a rotating cam (85). An inner peripheral surface of the tappet case (12) is provided with an air-vent passage (34) through which air existing between the tappet case (12) and the lash adjuster (11) can be discharged upward when the lash adjuster (11) is being assembled.
Provided is a tappet capable of supplying lubricating oil to a cam even when provided with a lash adjuster.
A tappet (10) includes: a lash adjuster (11) having a plunger (14) and a body (13) in which the plunger (14) is housed so as to be vertically movable, wherein the plunger (14) has a top portion (16) against which a lower end portion of a push rod (88) slidably abuts; and a tappet body (12) which has an assembly hole (45) in which the body (13) is inserted, has a cup-like shape, and has a lower surface portion (27) which slidingly contacts a cam (70). The tappet body (12) has an oil guide passage (30) extending so as to guide lubricating oil from the push rod (88) side to the cam (70).
A compressor housing for a turbocharger, which is composed of a scroll piece, a shroud piece, and an outer-circumferential annular piece. The scroll piece includes a through part constituting a discharge port, a first intermediate wall surface extended from an intake-side wall surface of a scroll chamber and smoothly connected with the discharge port, and a scroll outer-circumferential part. The outer-circumferential annular piece includes an outer-circumferential annular press-fit part press fitted into the scroll outer-circumferential part, and a protruding part bent from an outer-circumference-side wall surface of the scroll chamber. The protruding part is inserted into the through part to form an inner wall surface of an intermediate part that communicates the discharge port with the scroll chamber. Then, the compressor housing is fixed to a center housing that is made of iron with high rigidity through joining parts provided at the scroll piece.
A variable valve mechanism includes a first member and a second member which are disposed between a cam and a valve, a switch pin that is displaced to connect and disconnect the first member to and from the second member, and a displacement device. The displacement device includes a ring-shaped plate that is fitted on a camshaft of the cam so as to be co-rotatable with the camshaft and slidable in a longitudinal direction of the camshaft and that has one side surface configured to contact the switch pin and has the other side surface including a tapered surface formed so that a plate thickness increases toward a rotational direction, and a support device formed by a support pin and a moving device that moves the support pin to a position where the support pin contacts the tapered surface and a position not contacting the tapered surface.
F01L 1/34 - 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
A housing for a turbocharger that makes it possible to prevent sticking of deposit and attain satisfactory assembling workability and easy moldability by die casting. The housing dividably includes a scroll piece and a shroud piece, including an annular refrigerant flow path defined by a first flow-path formation part of the scroll piece and a second flow-path formation part of the shroud piece. The first and second flow path formation parts are fitted with each other at inner and outer circumferential seal parts for sealing the refrigerant flow path on inner and outer circumferential sides thereof. The inner circumferential seal part is formed by press-fitting a first press-fitting portion of the shroud piece into a first press-fitted portion of the scroll piece. The outer circumferential seal part is formed by press-fitting a second press-fitting portion of the shroud piece into a second press-fitted portion of the scroll piece.
In this tappet having a built-in lash adjuster, the leakage of hydraulic oil from a low-pressure chamber is prevented during long-term stoppage. This tappet (10) is provided with: a hydraulic lash adjuster (11) that supports the lower end of a push rod (96); and a tappet case (12) in which the lash adjuster (11) is fitted and which is reciprocatingly displaced in the vertical direction in response to the rotation of a cam (85). In the inner peripheral surface of the tappet case (12), an air-release passage (34) through which air present between the tappet case (12) and the lash adjuster (11) can be discharged upward when the lash adjuster (11) is fitted therein is provided.
Provided is a tappet which enables a lubricant oil to be supplied to a cam even when provided with a rush adjuster. This tappet (10) is provided with: a rush adjuster (11) which has a plunger (14) and a body (13) in which the plunger (14) is accommodated to be movable in the vertical direction, wherein a lower end section of a push rod (88) slidably contacts a top section (16) of the plunger (14); and a tappet body (12) which is in the shape of a cup and has a mounting hole (45) in which the body (13) is inserted, and a lower surface section (27) of which is in sliding contact with the cam (70). The tappet body (12) has an oil guide passage (30) extending so as to guide the lubricant oil from the push rod (88) side to the cam (70).
Providing a rocker arm which can ensure the durability while reducing the inertial mass. The rocker arm (10) includes a valve abutment part (15) pressing a valve (80). The valve abutment part (15) includes a receiving wall (14) abutting against an end surface of a stem end (81A) of the valve (80) in a pressing state and a pair of sidewalls (13) protruding from both side ends (14A) of the receiving wall (14) so as to be opposed to each other and disposed along and in proximity to a side peripheral surface of the stem end (81A) of the valve (80). At least protruding distal ends of the sidewalls (13) each have a smaller thickness than adjacent portions and serve as a thinner portion (23).
A variable valve mechanism includes a first cam and a second cam, a main arm that drives a valve when swinging, a first sub arm that swings when pressed by the first cam, a second sub arm that swings when pressed by the second cam, and a switch device. The switch device includes a first switch pin that moves between a first coupled position between the main arm and the first sub arm and a first uncoupled position, and a second switch pin that moves between a second coupled position between the main arm and the second sub arm and a second uncoupled position. Both switch pins are arranged so as to be displaced from each other in positions where these switch pins do not overlap at least during a base circle phase in which base circles of both cams act.
F01L 1/34 - 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
F01L 13/00 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
A rocker arm includes a pair of sidewalls disposed along a heightwise direction so as to be opposed to each other. The sidewalls define a space to house a roller and have opposed portions extending in the heightwise direction relative to adjacent portions which are adjacent to the opposed portions. The opposed portions have thinner portions having smaller thicknesses than the adjacent portions.
A variable valve mechanism of an internal combustion engine includes an outer arm, an inner arm, a switching device that switches between a coupled state and a non-coupled state, and a lost motion spring. The lost motion spring has an extending portion extending from the outside of the space to the inside of the space. The extending portion has a contact portion that is in contact with the inner arm in the space and being configured to swing in conjunction with swinging of the inner arm. A through-hole is formed in a vertically intermediate portion of the outer arm such that connecting portions are provided at vertically opposite sides of the through-hole, and a portion of the extending portion, a swinging amount of which is smaller than that of the contact portion, passes through the through-hole that allows the portion to swing therein.
A variable valve mechanism of an internal combustion engine includes a camshaft having a general shaft part and a cam part arranged next to each other in an axial direction, an input arm that swings when pressed by the cam part, an output arm that is swingably mounted and that drives a valve when swinging, and a switch device that switches the variable valve mechanism between a coupled state where the input arm and the output arm are coupled to swing together and an uncoupled state. The output arm has a great height so that clearance between the output arm and the general shaft part is 3 mm or less when the variable valve mechanism is in the coupled state and the valve is closed. If the output arm bounces in the uncoupled state, the output arm comes into contact with the general shaft part through the clearance.
F01L 1/34 - 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
A roller lifter includes a lifter body having a cylindrical peripheral wall and a roller rotatably mounted on the lifter body via a shaft member and brought into contact with a cam. The peripheral wall has an outer periphery formed with a sliding surface which is slid on an inner wall of a cylinder. The lifter body has a rotation stopper formed by outwardly protruding a part of the peripheral wall, and an opening formed in another part of the peripheral wall which another part is radially opposed to the rotation stopper. The opening is open so that the rotation stopper oppositely faces the opening.
F02M 59/10 - Pumps specially adapted for fuel-injection and not provided for in groups of reciprocating-piston type characterised by the piston drive
F02M 59/44 - Pumps specially adapted for fuel-injection and not provided for in groups - Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups
A lash adjuster includes a bottomed cylindrical body and a cylindrical plunger reciprocably inserted into the body and having a bottom wall and a peripheral wall. The plunger has a low-pressure chamber. The peripheral wall of the plunger includes an annular band portion abutting against an upper part of a peripheral wall of the body. The peripheral wall of the plunger has a plurality of plunger oil holes located below the band portion. The plunger oil holes include respective lower ends defining a level of the oil stored in the low-pressure chamber. The plurality of plunger oil holes are located at a common height position of the peripheral wall of the plunger coming close to the band portion.
In a variable valve mechanism of an internal combustion engine, when a slider is displaced relative to an input member and an output member in an axial direction, the output member turns relative to the input member in a swing direction, whereby a lift of a valve is increased or reduced. The variable valve mechanism is brought into a lift retaining state when the slider is placed in an idle running range located on a reducing direction side with respect to a boundary position. The lift retaining state is a state where when the slider is displaced in the axial direction, the input member and the output member are displaced together with the slider in the axial direction, so that the relative displacement of the slider and the relative turning of the output member do not occur and the lift of the valve is retained.
F01L 1/34 - 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
F01L 13/00 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
F01L 1/26 - Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines with more than two lift valves per cylinder
18.
Variable valve mechanism of internal combustion engine
A variable valve mechanism of an internal combustion engine includes a plurality of swing members and a variable device that displaces a control shaft to displace a plurality of slider gears of the swing members at a time, thereby changing valve lifts of the plurality of swing members at a time by meshing of helical splines. The swing members include a first swing member for a predetermined cylinder of a plurality of cylinders and a second swing member for a cylinder other than the predetermined cylinder, and a helix angle of the helical splines varies between the first and the second swing members. The variable device displaces the control shaft to a predetermined normal position to perform a normal operation, and displaces the control shaft to a predetermined cylinder cutoff position to perform a cylinder cutoff operation in which the second swing member does not drive a valve.
F01L 1/34 - 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
F01L 13/00 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
A lash adjuster includes a body which is cylindrical in shape and a plunger. The plunger is reciprocably inserted into the body and has an interior in which a low-pressure chamber is defined. The plunger has a bottom wall defining a high-pressure chamber in conjunction with the body between them and a peripheral wall formed with a plunger oil hole through which an operating oil is fed into the low-pressure chamber. The bottom wall is formed with a valve hole through which the operating oil stored in the low-pressure chamber is allowed to flow into the high-pressure chamber. The plunger has a pocket provided on the peripheral wall so as to be deformed toward the low-pressure chamber and inclined in an upward direction, defining the plunger oil hole.
The present invention provides a variable valve mechanism of an internal combustion engine, which includes an input member, an output member, a slider and a variable device. The output member has internal space formed therein and has a first cutout and a second cutout which are formed at two positions separated from each other in the swing direction so as to extend from an outer periphery of the output member to the internal space, and the input member is mounted in the internal space so as to extend through both inner sides of the first and second cutouts, and is brought into contact with inner side surfaces of the cutouts from both sides in the thrust direction, whereby relative displacement of the input member together with the slider in the thrust direction with respect to the output member is restricted at two positions by the first and second cutouts.
F01L 1/34 - 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
F01L 1/12 - Transmitting-gear between valve drive and valve
F16K 31/524 - Mechanical actuating means with crank, eccentric, or cam with a cam
The objective of the present invention is to provide a compressor housing for a supercharger which is capable of preventing the deterioration of a compression efficiency and maintaining the holding force for a sliding member, and is advantageous in costs, and a manufacturing method thereof. The compressor housing (1) for a supercharger is provided with a housing main body (20) that houses therein an impeller (10), and an annular sliding member (30) that forms a shroud surface (31). The sliding member (30) is provided with a flange (32) protruding radially outward, and is disposed in an inner circumferential recess (21) formed in the inner circumference surface of the housing main body (20). In addition, a ring-shaped member (40) formed in a ring shape along the inner circumferential recess (21) is press-fitted into the inner circumferential recess (21), and thus the flange (32) is held and fastened between a press-fit-direction front side face (41) of the ring-shaped member (40) and a recess opposing surface (213) of the inner circumferential recess (21) opposing the press-fit-direction front side face.
This invention addresses the problem of providing a compressor housing for a supercharger, which is simple in configuration and with which it is possible to reliably secure a sliding member. To solve this problem, a compressor housing (1) for a supercharger is provided with a scroll part (20) having a scroll chamber, and a shroud part (30) having a shroud surface (321). The shroud part (30) comprises an annular sliding member (32) which forms the shroud surface (321), and an annular sliding member securing part (31). The sliding member securing part (31) has a press-fitting concavity (317) into which the sliding member (32) is press-fitted, and a groove part (318) formed in the circumferential direction as being recessed diametrically outward in the front side of the sliding member (32) in the press-fitting direction (X). The sliding member (32) has a press-fitting contact part (322) which comes into contact with the inner peripheral surface of the press-fitting concavity (317), and a bulging part (323) which bulges into the groove part (318) in a position of facing the groove part (318).
F02B 39/00 - Component parts, details, or accessories relating to driven charging or scavenging pumps, not provided for in groups
F02C 7/00 - Features, component parts, details or accessories, not provided for in, or of interest apart from, groups ; Air intakes for jet-propulsion plants
F04D 29/42 - Casings; Connections for working fluid for radial or helico-centrifugal pumps
F04D 29/62 - Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
A roller lifter includes a first member having a pair of opposed portions opposed to each other and a connecting part connecting the opposed portions to each other, a shaft mounted between the opposed portions to rotatably support a roller brought into contact with a cam, a second member independent of the first member and having a cylindrical portion and an elastic mount elastically held between the opposed portions and the cylindrical portion to mount the first member to the second member.
Provided is a rocker arm in which durability can be ensured while inertial mass is reduced. A rocker arm (10) is provided with a valve contact part (15) for pressing a valve (80). The valve contact part (15) comprises a receiving wall (14) that, while being pressed, comes into contact with an end face of a stem end part (81A) of the valve (80), and a pair of side walls (13) which protrude facing each other from both side end parts (14A) of the receiving wall (14), which are disposed alongside and in proximity to the side peripheral faces of the stem end part (81A) of the valve (80), and of which at least the protruding tip parts are thin-walled parts (23) of lower wall thickness than adjacent portions.
A bearing device includes a support having a bearing hole, a shaft member slidably inserted into the bearing hole thereby to be rotatably supported by the support, the shaft member having an axial end surface and a locking part located on the axial end surface of the shaft member to protrude in an axial direction of the shaft member from an outer periphery of the axial end surface of the shaft member. The locking part is deformed by force applied to its axial protruding end so as to bulge outward in a radial direction intersecting the axial direction, so that the bulging part is capable of being locked to a peripheral part of the bearing hole on an outer surface of the support.
B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
F02M 59/44 - Pumps specially adapted for fuel-injection and not provided for in groups - Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups
26.
Variable valve mechanism of internal combustion engine
The present invention provides a variable valve mechanism of an internal combustion engine, which includes a rocker arm that includes a roller arm including a roller that rotatably abuts against a cam and a side arm provided at a side of the roller arm and that drives a valve, and a switching device that includes a switching pin and a hydraulic chamber provided inside the rocker arm and that switches a drive state of the valve by displacing the switching pin between a coupling position at which the switching pin extends between the roller arm and the side arm and a non-coupling position at which the switching pin does not extend between the roller arm and the side arm based on variations in hydraulic pressure in the hydraulic chamber. The switching pin is provided on an axis of the roller, and the hydraulic chamber is provided inside the roller arm.
The present invention provides a variable valve mechanism, which includes a rocker arm including an input member and an output member; a switching device that switches a drive state of the valve by displacing the switching pin between a coupling position at which the switching pin extends between the first pinhole in the input member and the second pin hole in the output member and a non-coupling position at which the switching pin does not extend; and a lost motion spring. A displacement clearance is formed between an inner peripheral surface of the first or second pin hole and an outer peripheral surface of the switching pin to permit the relative displacement in a range of the displacement clearance at a coupled time so that a tappet clearance is not formed with the input member urged toward the cam by the lost motion spring.
The present invention addresses the problem of providing a bearing mechanism (1) for a turbocharger with which abnormal sounds and reductions in operating efficiency are prevented, and manufacturing costs can be reduced. The bearing mechanism (1) for a turbocharger for overcoming this problem is provided with a rotor shaft (10), ball bearings (20), a retainer (60), and a housing (30). The rotor shaft (10) has a turbine impeller (10) attached to one end (10a), and a compressor impeller (12) attached to the other end (10b). The ball bearings (20) are provided with an inner ring (21) and an outer ring (22) supported so as to be capable of rotating relative to each other. The retainer (60) supports the outer ring (22). Oil in film form is interposed between the inner ring (21) and the outer peripheral surface (10c) of the rotor shaft (10), forming an oil film damper (50).
The present invention provides a variable valve mechanism of an internal combustion engine, which includes a rocker arm that is driven by a cam so as to swing to drive a valve, a switching pin that is attached to the rocker arm so as to be shifted between a first position and a second position, a shift device that shifts the switching pin from the first position to the second position, and a return spring that returns the switching pin. In the variable valve mechanism, a drive state of the valve is switched by shifting the switching pin, the rocker arm is formed to have such a dimension that one end of the switching pin is exposed while projecting outward from the rocker arm, and the return spring is externally fitted to the one end of the switching pin so as to be exposed outside the rocker arm.
F01L 1/34 - 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
F01L 13/00 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
F01L 13/08 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for changing compression ratio
F01L 1/04 - Valve drive by means of cams, camshafts, cam discs, eccentrics, or the like
Provided is a roller lifter in which the dimensional accuracy of an outer diameter is appropriately maintained. A shaft (25) for rotatably supporting a roller (30) is passed through and affixed, by staking, to a pair of facing sections (21). A cylindrical section (61) is disposed in such a manner that the position thereof relative to the pair of facing sections (21) is affixed. When a cam (90) rotates, the cylindrical section (61) is driven and reciprocated by means of the roller (30). A roller lifter (10) comprises: a first member (20) in which the shaft (25) is affixed by staking to the pair of facing sections (21); and a second member (60) which is a separate body from the first member (20), can be connected to the first member (20) through a connection section, and at least includes the cylindrical section (61).
The present invention provides a variable valve mechanism of an internal combustion engine, which includes a rocker arm that is swingably supported by a single pivot, and a switching device that operates the rocker arm to switch a drive state of the valve, in which the rocker arm is configured such that at least in a predetermined drive state, a pressing force of the cam is applied disproportionately to one side of the rocker arm in a width direction with respect to a center line when the cam presses a portion of the rocker arm located away from the center line in the width direction. The variable valve mechanism further includes a swing guide that abuts against the rocker arm so that the rocker arm is guided in a swing direction so as not to be tilted in the width direction.
A turbocharger includes a compressor housing, a bearing housing, a liquid gasket, and a recessed portion. The bearing housing is fixedly fastened to the compressor housing. The liquid gasket is configured to seal fastening surfaces of the compressor housing and the bearing housing. The recessed portion is provided on at least one of the fastening surfaces of the compressing housing and the bearing housing. The liquid gasket is provided between the fastening surfaces in a portion which the recessed portion is provided.
A lash adjuster includes a plunger having a bottom wall with a valve hole and a peripheral wall having an oil passage hole and an inner periphery formed with a recessed groove, the plunger defining a high-pressure chamber between the bottom wall and a body, and a partitioning member having an oil passage end located above the oil passage hole. The partitioning member has an oil-passage defining portion located opposite the recessed groove and defining an oil passage between itself and a groove face of the recessed groove. The partitioning member defines a low-pressure chamber reserving a hydraulic fluid flowing through the oil passage hole, the oil passage and the oil passage end. The low-pressure chamber causes the reserved hydraulic fluid to flow through the valve hole into the high-pressure chamber. The partitioning member is formed into a cylindrical shape and extends in an up-down direction without any stepped part.
A balancer device includes: a shaft (2) rotating around a rotational axis line; and a balancer mass (23) mounted on the shaft (2) and disposed eccentrically relative to the rotational axis line (CL1), the balancer mass (3) having a recessed portion (23a) on an outer periphery of the balancer mass to extend along a rotational direction of the balancer mass (23).
A damper structure for a gear device includes a first gear (2) mounted to turn with respect to a shaft (1) in a circumferential direction, a second gear (3) mounted on the shaft (1) to rotate integrally, a stopper rubber (33) mounted on the second gear (3) to face the first gear (2), and a pressing protrusion (24) at the first gear (2) to face the second gear (3). The stopper rubber (33) is configured to be elastically deformed by pressing the pressing protrusion (24) in a circumferential direction of the second gear (3) during rotation of the first gear (2) and be restored to the initial shape by separating the pressing protrusion (24) during stop of the first gear (2). A recess (25) for accumulating lubricating oil in the first gear (2) is formed to face the stopper rubber (33).
A turbocharger includes a compressor housing, a bearing housing and a back plate. A discharge scroll chamber has such a shape that a cross-sectional area thereof gradually increases toward a discharge port in a circumferential direction. The compressor housing includes a scroll piece assembled to a shroud piece. The scroll piece includes a suction port-forming portion, a suction-side concave surface and a scroll outer periphery. The shroud piece includes a shroud fit-in portion, an inner peripheral concave surface, a shroud surface and a diffuser surface. The back plate includes a facing surface, an outer peripheral annular fit-in portion and an outer peripheral concave surface. The outer peripheral concave surface has such a shape that a cross sectional shape thereof formed by a plane including a rotation axis of an impeller gradually changes in the circumferential direction.
A roller lifter for internal combustion engines is provided, which has higher rigidity of the lifter body, prevents cocking in the cylinder, and can achieve a size reduction. The roller lifter includes a cylindrical lifter body having a sliding surface on an outer circumferential surface thereof and a roller rotatably attached to the lifter body via an axial support pin and making contact with a rotating cam lobe. The lifter body includes a pair of support portions supporting the axial support pin. The axial support pin is mechanically fastened to the pair of support portions, with both ends thereof inserted in support holes formed in the support portions. The lifter body includes an anti-rotation retainer extending radially outward from the sliding surface. The sliding surface is formed on both front and rear sides in the sliding direction of the anti-rotation retainer.
A compressor housing (1) includes a scroll member (2), a shroud member (4), and an annular member (6). The scroll member (2) has a first positioning portion (31), which contacts the shroud member (4) to determine the position of the shroud member (4) in relation to the scroll member (2) in the circumferential direction of the impeller (8), and a second positioning portion (32), which contacts the annular member (6) to determine the position of the annular member (6) in relation to the scroll member (2) in the circumferential direction of the impeller (8). The first positioning portion (31) and the second positioning portion (32) are formed at the same position in the circumferential direction of the impeller (8).
Provided is a lifter structure which does not require strict dimension control. The lifter structure is provided with a lifter (10) and a housing (60) for guiding the lifter (10). The housing (60) comprises a bore (61) into which the lifter (10) can be inserted so as to be able to move backwards and forwards. Between the inner circumferential surface of the bore (61) of the housing (60) and the outer circumferential surface of the lifter (10) are formed a neighbouring region (65), in which the distance between both circumferential surfaces is adjacent, and separated regions (66), in which the distance between both circumferential surfaces in the direction of movement on both sides of the lifter (10) sandwiching the neighbouring region (65) is further apart than the neighbouring region (65).
F04B 9/02 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
F02M 59/10 - Pumps specially adapted for fuel-injection and not provided for in groups of reciprocating-piston type characterised by the piston drive
F04B 9/04 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
40.
Compressor housing for supercharger and method for manufacturing the same
In a compressor housing, a scroll piece includes a cylindrical intake port forming section, a scroll wall surface forming section that forms an air-intake side wall surface of a discharge scroll chamber, and a scroll outer circumferential section that covers an outer circumferential side of the discharge scroll chamber. A shroud piece of the housing includes a cylindrical shroud press fitted section press fitted into the intake port forming section, and a shroud wall surface forming section that forms an inner circumferential side wall surface of the discharge scroll chamber and also forms a shroud surface that opposes an impeller and a diffuser surface. An outer circumferential annular piece of the housing includes an outer circumferential annular press fitted section press fitted inside the scroll outer circumferential section, and an outer circumferential annular wall surface forming section that forms an outer circumferential side wall surface of the discharge scroll chamber.
Disclosed is a compressor housing (1) which comprises: a scroll piece (2) which has a cylindrical air intake port forming section (21) which forms an air intake port (11), a scroll wall surface forming section (22) which forms an intake-side wall surface in a discharge scroll chamber (12), and a scroll outer peripheral section (23) which covers the outer peripheral side of the discharge scroll chamber (12); a shroud piece (3) which has a cylindrical shroud press-fitted section (31) that is press-fitted inside the air intake port forming section (21) and a shroud wall surface forming section (32) that forms an inner peripheral side wall surface in the discharge scroll chamber (12) and also forms a shroud surface (321) and a diffuser surface (322) that face an impeller (5); and an outer peripheral annular piece (4) which has an outer peripheral annular press-fitted section (41) that is press-fitted inside the scroll outer peripheral section (23) and an outer peripheral annular wall surface forming section (42) that forms an outer peripheral wall surface in the discharge scroll chamber (12).
A fuel delivery pipe delivers fuel to a plurality of fuel injection valves corresponding to cylinders of an internal-combustion engine. The fuel delivery pipe includes a pipe body made of carbon steel for machine structural use and a plating film disposed on an inner surface of the pipe body. Preferably, the fuel delivery pipe includes a plating film disposed on an outer surface of the pipe body.
It is an object of the present invention to provide a rotor shaft capable of sufficiently securing a fastening strength between an inner shaft and an outer shaft, obtaining an excellent anti-rotation torque, and reducing a weight of the rotor shaft. A rotor shaft is divided into an inner shaft and an outer shaft. The inner shaft includes a tip end portion, a rear end portion, and a thick portion. The thick portion connects the tip end portion 41 and the rear end portion with each other in the radial direction, and has the same inner diameter as that of the tip end portion and the same outer diameter as that of the rear end portion. The outer shaft includes an inner cylindrical portion, a magnetic body-mounting outer cylindrical portion, and a flange that connects the inner cylindrical portion and the magnetic body-mounting outer cylindrical portion with each other. Outer peripheral surfaces and of the thick portion and the rear end portion and an inner peripheral surface of the inserting hole of the inner cylindrical portion are brought into contact with each other, and the inner shaft and the outer shaft are fastened and fixed to each other. The flange is disposed at a position opposed to the thick portion in the radial direction.
Disclosed is a variable valve mechanism that is reduced in size by providing a crank mechanism in place of an oval cam on an input shaft which is rotatably driven by means of the crank shaft of an internal combustion engine. The variable valve mechanism (10) has a variable mechanism (30) which changes the degree of opening of a valve (13), and is characterized by having an input shaft (12) which is rotatably driven by means of an internal combustion engine; by being connected to the variable mechanism (30); and in that a crank mechanism (14) which converts the rotational movement of the input shaft (12) to a reciprocating movement for the purpose of opening/closing the valve (13) is provided on the input shaft (12).
A rocker arm unit is provided with a lash adjuster having an axially extending plunger and also having a tubular body for slidably housing the plunger, a rocker arm supported at the upper end of the plunger and rocking substantially on the point on which the rocker arm is supported, and a clip fixed to a body and extending from the point to which the clip is fixed and engaging with the rocker arm to prevent dislocation of the rocker arm from the lash adjuster.
A lash adjuster in which, when a plunger descends, a valve element moves to a valve closing position without delay. A check valve (27) has a valve hole (28) penetrating through a bottom wall (17) of a plunger (12), a retainer (30) placed in a high-pressure chamber (25) and vertically moving together with the plunger (12), and a valve element (29) capable of vertically moving in the high-pressure chamber (25), between a valve opening position at which the valve element (29) is separated from the valve hole (28) to be placed on the retainer (30) and a valve closing position which is located above the valve opening position and at which the valve element (29) closes the valve hole (28). When the plunger (12) is at a standstill, the valve element (29) is held at the valve opening position by the weight of the valve element itself.
Provided is a cam housing (3) comprising a body portion (4) made separate of a cylinder head (1) and fixed on the cylinder head (1) while supporting rotatably a camshaft (2) for driving a valve (10), a sub-housing (20) having a mounting recess (21) for mounting a rash adjuster (18) and fixed on the body portion (4) by applying a mounting face (20A) different from the face having the opening of the mounting recess (21), to the outer face of the body portion (4), and an air bleed passage (22) formed in the sub-housing (20) while extending between the wall face forming an internal space formed in the mounting recess (21) when the rash adjuster (18) is mounted in the mounting recess (21) and the mounting face (20A). Thus, the residual air in the mounting recess can be relieved at the time of mounting the rash adjuster, while preventing the working oil in the rash adjuster at the time of an engine stop from flowing out into an engine room.
A hydraulic auto-tensioner includes a high-pressure oil chamber and a low-pressure oil chamber, and oil (L) in the high-pressure oil chamber passes through a clearance (G) between a cylinder (17) and a piston portion (18) of a plunger and leaks into the low-pressure oil chamber from an end of the clearance (G) near an end surface of the cylinder (17). A recessed groove (40) is provided in an inner peripheral surface of the cylinder (17) by a conical surface (41) having a groove angle of 5 to 15 degrees from the end of the clearance (G), a throttle portion (45) projecting onto the piston portion (18) side is provided further toward the end surface side of the cylinder than the groove (40) in the inner peripheral surface of the cylinder (17), and a throttle gap (A) larger than the clearance (G) is formed between the throttle portion (45) and the piston portion (18).
A manufacturing method for a rocker arm capable of stably forming valve stem guide walls. In the method, an intermediate product (13) having both side walls (20) extending in a predetermined direction and an end part connection wall (30) connecting the longitudinal one end parts of these both side walls (20) to each other is first manufactured. The areas of the outer surface parts of these both side walls (20) are plastically fluidized downward from cutout parts (31) in the outer surface parts of the both side walls by driving first pressing punches (70) therein from the outside to form rise walls (32) in a downwardly projected shape on both sides of the end part connection wall (30). Then, the both side rise walls (32) of the end part connection wall (30) are formed by driving second pressing punches (80) therein from the outside to form the valve stem guide walls (35).
A method for manufacturing a rocker arm capable of increasing the durability of the rocker arm and providing excellent productivity. According to the method, firstly, an intermediate product (13) having both side-walls (20) disposed parallel with each other extendedly in a predetermined direction and an one end side connection wall (30) connecting the lower ends of the both side-walls (20) to each other at the longitudinal one end side is obtained. Secondly, the both side-walls (20) of the intermediate product (13) at one end side are bent so as to be tilted inward. Thereafter, the outer surface parts of the both side-walls (20) are molded by pressing a die (60) for molding by ironing against the outer surfaces of the tilted both side-walls (20) from the upper side to the lower side to plastically fluidize the components of the both side-walls (20) downward. As a result, valve stem guide walls (35) projected downward can be formed at both sides of the one end side connection wall (30).
A rotary assembly and a method of manufacturing the rotary assembly. In the rotary assembly, an inner hole (31) for inserting a drive shaft (2) therein is formed in the cam piece (3) of a camshaft (1), and a plurality of grooves (34) extending in the insertion direction of the drive shaft (2) are formed in the inner hole (31). The drive shaft (2) is inserted into the inner hole (31) in the state of the inner hole (31) enlarged by heating the cam piece (3). When the inner hole (31) is re-shrunk in this state by cooling, the outer peripheral surface of the drive shaft (2) is pressed and raised by the inner hole (31), and fitted into the grooves (34). As a result, the cam piece (3) is firmly fixed onto the drive shaft (2).
A rotary assembly, wherein the cam piece (3) of a camshaft (1) comprises a circular base circle part (31) surrounding a drive shaft (2) in a mounted state. A pair of sleeve parts (33) extending from both end faces of the base circle part (31) in its insertion direction are formed on the cam piece. Inner holes (34) are formed in the sleeves (33) at the contact parts on the outer peripheral surface of the drive shaft (2), and a plurality of grooves (35) extending in a drive shaft (2) insertion direction are formed in the inner hole (34). Also, projected lines (37) extending in the drive shaft (2) insertion direction are formed in the inner hole (34), and a keyway (21) engaged with one of the projected lines (37) is formed in the outer peripheral surface of the drive shaft (2). By engaging the projected line (37) with the keyway (21) in the enlarged state of the inner hole (34) by heating the cam piece (3), the drive shaft (2) is inserted into the inner hole (34) while positioning in its rotating direction to firmly fix the cam piece (3) onto the drive shaft (2).
F16D 1/08 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with hub and longitudinal key
F16H 53/02 - Single-track cams for single-revolution cycles; Camshafts with such cams
F01L 1/04 - Valve drive by means of cams, camshafts, cam discs, eccentrics, or the like
patents
