Abstract

An exhaust valve for an internal combustion engine comprises a valve disc having a first side (14) and a second side (16), a valve stem extending from the first side of the valve disc, and an annular valve seat area (11) located at the first side of the valve disc. The annular valve seat area (11) is of a nickel-base alloy or a chromium-base alloy and has a valve seat surface. The annular valve seat area has at least a first annular portion (43) located in between two second annular portions (42). The first annular portion has lower hardness than the two second annular portions.

IPC Classes  ?

• F01L 3/04 - Coated valve members or valve seats
• F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
• C21D 1/18 - HardeningQuenching with or without subsequent tempering
• C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

A fuel valve (1) for injecting fuel into the combustion chamber of a large two-stroke self-igniting internal engine combustion engine, with a valve needle (20) that is resiliently biased towards a valve seat (22). The effective pressure surface that causes fuel pressure to urge the valve needle (20) in the opening direction increases significantly when the valve needle (20) has lift from the valve seat (22). A supplementary effective pressure surface (29) is provided on the valve needle (20). The supplementary effective pressure surface (29) creates a force urging the valve needle (20) towards the valve seat (22) when the supplementary effective pressure surface (29) is exposed to fuel pressure.

IPC Classes  ?

• F02M 47/02 - Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves, and having means for periodically releasing that closing pressure
• F02M 61/04 - Fuel injectors not provided for in groups or having valves
• F02M 61/10 - Other injectors with elongated valve bodies, i.e. of needle-valve type

Abstract

A fuel valve (50) for injecting gaseous fuel into the combustion chamber of a self-igniting internal combustion engine. The fuel valve (50) comprises an elongated fuel valve housing (52) with a rear end and a front end, a nozzle (54) with a plurality of nozzle holes (56) opening to a sac volume (55) inside the nozzle (54), the nozzle (54) being disposed at the front end of the elongated valve housing (52), a gaseous fuel inlet port (53) in the elongated fuel valve housing (52) for connection to a source (60) of high pressure gaseous fuel, an axially displaceable valve needle (61) slidably received in a longitudinal bore (77) in the elongated valve housing (52), the axially displaceable valve needle (61) having a closed position and an open position, the axially displaceable valve needle (61) rests on a valve seat (69) in the closed position and the axially displaceable valve needle (61) has lift from the valve seat (69) in the open position, the valve seat (69) being placed between a fuel chamber (58) and an outlet port (68), the fuel chamber (58) is fluidly connected to the gaseous fuel inlet port (53), the outlet port (58) is fluidly connected to the sac volume (55) in the nozzle (54), an actuator system for controllably moving the axially displaceable valve needle (61) between the closed position and the open position, an ignition liquid inlet port (78,98) for connection to a source of high pressure ignition liquid (57), and an ignition liquid supply conduit (76,99) connecting the ignition liquid inlet port (78,98) to the fuel chamber (58), the ignition liquid supply conduit (76,99) including a fixed flow restriction.

IPC Classes  ?

• F02M 43/04 - Injectors peculiar thereto

Abstract

An exhaust valve spindle for an exhaust valve in an internal combustion engine has a shaft and a valve disc at the lower end of the shaft, which valve disc at its upper surface has a seat area. The seat area is of a seat material comprising at least from 34.0 to 44.0% Cr, an aggregate amount of Nb and Ta in the range from at least 2.8 to 6.1%, from 0.3 to 2.0% Ti, at the most 0.2% Al, at the most 0.04% B, at the most 0.8% Fe, at the most 0.04% C, at the most 0.4% Si, and a balance of Ni, where the amount of Ti+Nb+0.5×Ta is in the range from 3.4 to 6.6%, and where the amount of Nb+0.5×Ta is less than 3.0% if the amount of Ti is larger than 1.5%.

IPC Classes  ?

• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• F16K 41/00 - Spindle sealings
• F01L 3/04 - Coated valve members or valve seats
• C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
• C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
• B22F 3/15 - Hot isostatic pressing
• C22C 1/04 - Making non-ferrous alloys by powder metallurgy

Abstract

A fuel valve (50) for injecting gaseous fuel into the combustion chamber of a self-igniting internal combustion engine. The fuel valve (50) comprises an elongated fuel valve housing (52) with a rear end and a front end, a nozzle (54) with an elongated nozzle body with a hollow interior that forms a chamber (55) connected to nozzle holes (56), the nozzle (54) being arranged at the front end of the fuel valve housing (52), a gaseous fuel inlet port (53) in the elongated fuel valve housing (52) for connection to a source (60) of high pressure gaseous fuel, an ignition liquid inlet port (78,98) for connection to a source of ignition liquid (57), means (61,69,53,58,61,69) for establishing a timed fluidic connection between the gaseous fuel inlet port and the ignition space (55), and means (61,67,69,76,79,85,98,99) configured for a timed delivery of a finite volume of ignition liquid to the chamber (55) for igniting the gaseous fuel inside the chamber (55).

IPC Classes  ?

• F02M 43/04 - Injectors peculiar thereto
• F02M 61/04 - Fuel injectors not provided for in groups or having valves
• F02M 61/10 - Other injectors with elongated valve bodies, i.e. of needle-valve type

Abstract

The invention relates to the lubrication of the cylinders (1) of internal combustion engines that burn acid-generating fuels, wherein several lubricants having different neutralization capability are used. According to the invention an optimization of the lubrication and of the acid neutralization and thus high operational reliability and economic efficiency can be achieved in that at least one lubricant having a neutralization capability that does not exceed the neutralization requirement in any possible use case and at least one lubricant having an neutralization capability that is not less than the neutralization requirement in any possible use case are used and that the lubricants used are individually fed to the cylinder interior in metered amounts and are mixed in the cylinder interior.

IPC Classes  ?

• F01M 11/02 - Arrangements of lubricant conduits
• F01M 1/08 - Lubricating systems characterised by the provision therein of lubricant-jetting means

Abstract

The invention relates to a system for influencing the sliding properties of the sliding surfaces of a sliding pair by supplying the sliding surfaces with a conditioning agent, a plurality of different components being used to produce the conditioning agent. A good functioning of the sliding pair can be obtained in the long term by dynamically conditioning the sliding properties of the sliding surfaces, the sliding situation of the sliding surfaces being continuously monitored and the conditioning agent supplied to the sliding surfaces being optimized depending on the current sliding situation.

IPC Classes  ?

• F01M 1/16 - Controlling lubricant pressure or quantity
• F01M 3/04 - Lubrication specially adapted for engines with crankcase compression of fuel-air mixture, or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture for upper cylinder lubrication only
• F01M 9/02 - Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups having means for introducing additives to lubricant
• F16N 29/02 - Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditionsUse of devices responsive to conditions in lubricating arrangements or systems for influencing the supply of lubricant

Abstract

An exhaust valve spindle for an exhaust valve in an internal combustion engine has a shaft and a valve disc at the lower end of the shaft, which valve disc at its upper surface has a seat area. The seat area is of a seat material comprising at least from 34.0 to 44.0% Cr, an aggregate amount of Nb and Ta in the range from at least 2.8 to 6.1%, from 0.3 to 2.0% Ti, at the most 0.2% Al, at the most 0.04% B, at the most 0.8% Fe, at the most 0.04% C, at the most 0.4% Si, and a balance of Ni, where the amount of Ti+Nb+0.5×Ta is in the range from 3.4 to 6.6%, and where the amount of Nb+0.5×Ta is less than 3.0% if the amount of Ti is larger than 1.5%.

IPC Classes  ?

• F16K 41/00 - Spindle sealings
• F01L 3/04 - Coated valve members or valve seats
• C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
• C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
• B22F 3/15 - Hot isostatic pressing
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• C22C 1/04 - Making non-ferrous alloys by powder metallurgy

Abstract

At an engine of the crosshead type, especially a big sized two stroke diesel engine, having a crankcase (1) as well as at least one cylinder (3) containing a cylinder liner (4), which extends in a surrounding scavenge chamber (7) and is ending above a chamber bottom (8) of the scavenge chamber (7), and wherein a piston rod (11 ) is provided, which connects a piston (5) going up and down within the cylinder liner (4) with an associated crosshead (10) arranged in the crankcase (1 ), and which penetrates a seal packing (15) provided in the chamber bottom (8), pollution of the system oil of the crankcase (1 ) by cylinder oil and/or combustion residues can be prevented in that the blast generated during the start of the piston upstroke and passing the lower edge of the cylinder liner (4) is diverted from a radial direction to an at least mostly axial direction.

IPC Classes  ?

• F16J 15/26 - Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings

Abstract

In a device for scraping off a circumferential surface, wetted with a fluid, of a rod, whereto the device dimensionality is adapted, which is movable in an axial direction, comprising at least two scraper lamellas (23a, b) of equal shape which are mutually offset relative to each other in axial direction and having radial variability, and which, with a radial protrusion, are received on a common holder ring (21) which is provided with a respective radial inner open annular groove for each one of said lamellas (23a, b) and has likewise radial variability, and which, due to a spring arrangement associated with its radial outer surface, can be reduced in size in a radial direction, an optimal scraping effect of all scraper lamellas (23a, b) of a common holder ring (21) can be attained in that at least the rear lamella (23a) in the moving direction of the rod (11) is radially resiliently supported relative to the groove bottom of said lamella's annular groove.

IPC Classes  ?

• F16J 15/26 - Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings

Goods & Services

Marine propellers; propellers for ships; screw-propellers; propeller shafts for ships; propeller feathering units. Development of software programs for the adaption of ship propellers; design of ship propellers; engineering consulting services concerning software for the adaption of ship propellers; engineering consulting services in the field of design of ship propellers.

Goods & Services

(1) Marine propellers; propellers for ships; screw propellers; propeller shafts for ships; propeller feathering units (1) Development of software programs for the adapting of ship propellers; design of ship propellers; engineering consulting services concerning software for the adapting of ship propellers; engineering consulting services in the field of designing of ship propellers

Abstract

The invention relates to an internal combustion engine, in particular a large two-stroke diesel engine, comprising at least one combustion chamber (2) delimited by a cylinder (1) and a piston (3) interacting with a crankshaft, said combustion chamber comprising at least one combustion gas outlet (20; 120; 320; 420), which is formed between a valve disk (8; 108; 308) of an exhaust valve (9; 109; 309) and an associated disk seat, and at least one charge air inlet (4). The exhaust valve (9; 109; 309) can be actuated between an open position and a closed position. The combustion gas outlet (20; 120; 320; 420) is connected to at least one outlet channel (11) and to at least one combustion gas draw-off duct (18; 118a, 118b; 318, 318a; 418, 418a), for example in order to recirculate part of the combustion gas generated during combustion to the charge air inlet (4). The invention further relates to an exhaust valve (9; 109; 309) and to a cylinder head for such an internal combustion engine. The invention is characterized by a throttle device (10; 110; 310) which is fastened to the exhaust valve (9; 109; 309) or integrally molded as part of the exhaust valve (9; 109; 309) and by means of which the combustion gas is drawn off in a predetermined way. The invention further relates to a method for producing an internal combustion engine, to a method for operating an internal combustion engine, and to a use for an internal combustion engine.

IPC Classes  ?

• F02M 25/07 - adding exhaust gases
• F01L 1/28 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of coaxial valvesValve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of valves co-operating with both intake and exhaust ports
• F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group
• F01L 3/22 - Valve seats not provided for in preceding subgroups of this groupFixing of valve seats

Abstract

In a part or component for machines, in particular large-scale machines, which consists of grey cast iron with graphite embedded in a basic microstructure, it is possible to achieve a high load-bearing capacity and also good machining properties and good tribological properties by virtue of the fact that finely lamellar troostite is formed as the matrix material, in which the graphite is incorporated in lamellar form, by controlled cooling according to a predefined temperature-time correlation with a normalizing process at 850-900°C, subsequent rapid cooling down to about 400°C and subsequent, relatively slow residual cooling.

IPC Classes  ?

• C22C 37/00 - Cast-iron alloys
• C21D 5/00 - Heat treatment of cast-iron

Abstract

A two-stroke crosshead large Diesel engine, comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber. The combustion chamber on its outer wall presents a predetermined breaking point, which is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine. The predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions.

IPC Classes  ?

• F02B 77/08 - Safety, indicating, or supervising devices
• F16K 17/14 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side with fracturing member

Abstract

The invention is directed to a pipe end sealing structure (1) comprising a first pipe element (2) having a cylindrical metal pipe body with a first annular end surface (12) at at least one open pipe end adapted to be a sealing support surface, a sealing (4) having a metal sealing body with a first sealing surface (13) facing towards first annular end surface (12) and being adapted to rest at least partially on the first annular end surface (12), a first flange (3) extending radially outwardly from an outer circumference of the first pipe element (2), urging means (7, 8, 9) adapted for urging the sealing (4) and the first flange (3) in an axial direction towards each other, so that the sealing (4) is urged with its first sealing surface (13) against the first annular end surface (12) of the first pipe element (1), wherein the first annular end surface (12) of the cylindrical metal pipe body is a tapered annular surface (12) and the first sealing surface (13) of the metal sealing body is a conical inner circumferential surface (13) facing towards and resting at least partially on the first tapered annular end surface (12) of the first pipe element (2). The invention is characterized in that the first flange (3) being fixed on the outer circumference of the first pipe element (2) at least against axial movement towards the open pipe end, the urging means (7, 8, 9) are adapted for urging the sealing (4) and the first flange (3) with such an urging force towards each other, that the connection of the sealing (4) and the first pipe element (1) is gas tight between the conical inner circumferential surface (13) and the tapered annular surface (12) for high pressure gases with a high pressure above 250 bar, and the metal pipe body and the metal sealing body have a rigidity sufficient to withstand this high pressure of the high pressure gas and to withstand an urging force of the urging means (7, 8, 9) sufficient to make the connection gas tight..

IPC Classes  ?

• F16L 23/028 - Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder

Abstract

A piston ring (6) which is arranged with radial and axial play in an associated piston ring groove (5) in a piston (1) of a reciprocating internal combustion engine can be stabilized to prevent tilting on and contact with the radially outer edge of the piston ring groove (5) by the cross section of the piston ring (6) and/or the piston ring groove (5) being designed in such a manner that a gap is formed between the lower side of the piston ring (6) and the lower supporting surface of the associated piston ring groove (5), said gap opening vertically radially outwards in the radial direction and, when the piston ring (6) is not subjected to a load, remaining open to the outside irrespective of the temperature of the piston (1) for as long as the piston ring (6) is not loaded by pressure on the top side. The effect achieved by this is that, when a piston (1) is deformed under the action of heat during operation, the initial contact between the lower side of the piston ring (6) and the opposite, lower supporting surface of the piston ring groove (5) begins at least in a region of the lower side of the piston ring (6), which region faces the piston axis, and rubbing of the piston ring (6) on the radially outer edge of the piston ring groove (5) is prevented.

IPC Classes  ?

• F02F 3/00 - Pistons
• F02F 5/00 - Piston rings, e.g. associated with piston crown
• F16J 9/22 - Rings for preventing wear of grooves or like seatings
• F16J 9/20 - Rings with special cross-sectionOil-scraping rings

Abstract

The invention relates to a valve assembly, comprising a valve (4) which is associated with a gas conduit (8), has a valve disc (6) and a valve stem (7) supporting said valve disc and is provided with a cooling device. In said valve assembly, a simple design, high functional reliability and a good energy balance can be achieved by using a gaseous cooling medium or a cooling medium which consists at least partially of components that can be converted into a gaseous state. The cooling medium is discharged as gas into a gas conduit (8) via at least one outlet chamber (17), and for this purpose each discharge duct (19) originating from the outlet chamber (17) opens into a gas conduit (8).

IPC Classes  ?

• F01L 3/12 - Cooling of valves
• F01L 3/16 - Cooling of valves by means of a fluid flowing through or along valve, e.g. air
• F01L 3/18 - Liquid cooling of valve

Abstract

An exhaust valve spindle (1) for an internal combustion engine, particularly a two-stroke crosshead engine, which exhaust valve spindle comprises a valve head (3) with a base portion (4) of an alloyed steel, and an outer facing (5) forming the surface of the valve spindle towards a combustion chamber. The outer facing (5) has been formed from particulate starting material of a hot-corrosion-resistant alloy being nickel-based, chromium- based or cobalt-based, where said particulate starting material has been united to a coherent layer. At least at the transition zone to the base portion (4) the particles in the particulate material of the outer facing (5) have been deformed into oval or elongate shapes by shear strain caused by forging the outer facing and the base portion, and that the forged outer facing (5) has a density of at least 98.0 %.

IPC Classes  ?

• F01L 3/04 - Coated valve members or valve seats
• B22F 3/17 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor by forging
• B21K 1/24 - Making machine elements valve parts valve bodiesMaking machine elements valve parts valve seats

Abstract

A nozzle for a fuel valve (1) for an internal combustion engine, particularly a two-stroke crosshead engine, which nozzle for a fuel valve comprises a valve head (3) with a core portion (4) of an alloyed steel, and an outer facing (5) forming the surface of the nozzle towards a combustion chamber. The outer facing (5) has been formed from particulate starting material of a hot-corrosion-resistant alloy being nickel-based, chromium-based or cobalt based, where said particulate starting material has been united to a coherent layer. At least at the transition zone to the core portion (4) the particles in the particulate material of the outer facing (5) have been deformed into oval or elongate shapes by shear strain caused by forging the outer facing and the core portion, and that the forged outer facing (5) has a density of at least 98.0 %.

IPC Classes  ?

• F02M 61/18 - Injection nozzles, e.g. having valve-seats
• B22F 3/17 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor by forging

Abstract

x-emission of a large sized two stroke diesel engine having at least one combustion room (3), a reciprocating piston (4) and an exhaust opening (12) controlled by an exhaust valve (13) at each work cyclus a small volume of burnt gas is retained in the combustion room (3) and so added to the fresh air for the next combustion. For achieving this retention of burnt gas the underside of the valve disc (15) off the exhaust valve (13) is provided with a shallow concave face (17) building a basin-like collection room, whose depth is within a range of 2-10% of the outer diameter of the valve disc (15).

IPC Classes  ?

• F01N 3/00 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
• B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
• F01L 3/00 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing facesParts or accessories thereof
• F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
• F02B 47/08 - Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including exhaust gas
• F02M 25/07 - adding exhaust gases
• F01L 3/06 - Valve members or valve seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
• F02B 23/06 - Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston

Goods & Services

(1) Parts and fittings for motors and engines, turbochargers and exhaust gas turbines for ships and stationary plants; pumps as part of motors and engines for ships and stationary plants; cylinders for motors and engines; machines, namely, pulverisers, parts of machines, namely, feeders; hydraulic lubricating devices for motors and engines; lubricating pumps; parts of machines and engines, namely, pistons; parts of machines and engines, namely, cylinder lubricating device.

Abstract

A steel or iron friction member (50) is provided with a predetermined exact thickness for creating high resistance to shear movement when said friction member (50) is squeezed between two mating metallic surfaces (30,32,44,46) of at least two machine parts (20,40) by at least two clamping devices (42) per friction element (50). For providing the squeeze force the friction member (50) is provided with at least one friction face (47) to mate with a mating face (30,32,44,46) of one of said machine parts, The method involves roughening said friction face (47) followed by non-depositing surface hardening the roughened friction face (47).

IPC Classes  ?

• F16B 2/00 - Friction-grip releasable fastenings
• C21D 1/09 - Surface hardening by direct application of electrical or wave energySurface hardening by particle radiation
• F16C 9/02 - Crankshaft bearings

Abstract

A large two-stroke turbocharged diesel engine of the crosshead type provided with an exhaust gas recirculation system and with a fuel injection system that can, selectively add water to the fuel flow to thereby increase the mass flow through the injection nozzles under particular operating conditions, e.g. at high exhaust gas recirculation rates. The increased mass flow through the injection nozzles improves the entrainment of the fresh charge into the high-speed of the fuel spray and thereby increases the fuel/air mixing and brings the combustion towards the lean side and hence counteracts soot formation.

IPC Classes  ?

• F02M 25/03 - Adding water into the cylinders
• F02D 21/08 - Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion-air the other gas being the exhaust gas of engine
• F02D 41/00 - Electrical control of supply of combustible mixture or its constituents
• F02M 43/04 - Injectors peculiar thereto

Abstract

In cleaning engine exhaust gas, a high cleaning degree can be achieved by supplying at least a part of the finely dispersed cleaning liquid to be supplied to the exhaust gas to an exhaust gas total flow not yet split into partial flows. In said process, the exhaust gas is first brought into contact with a finely dispersed cleaning liquid, and the volume flow, formed from the exhaust gas and the finely dispersed cleaning liquid, subsequently has to pass a bath of cleaning liquid provided in a container (1), said bath being divided into a lower and an upper compartment (19, 20) by a gas- and liquid-permeable baffle element (18), wherein the volume flow, formed by exhaust gas and finely dispersed cleaning liquid, is introduced into the area of the cleaning liquid bath located underneath the baffle element (18), and from here, runs through the area of the cleaning liquid bath located above the baffle element (18).

IPC Classes  ?

• F01N 3/04 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of liquids
• F01N 3/037 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of inertial or centrifugal separators, e.g. associated with agglomerators
• F02M 25/07 - adding exhaust gases
• B01D 47/02 - Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
• B01D 47/06 - Spray cleaning
• B01D 47/10 - Venturi scrubbers
• B01D 53/78 - Liquid phase processes with gas-liquid contact

Abstract

When scrubbing engine exhaust gas, where at first admission of a dispersed scrubbing liquid into the exhaust gas occurs, and subsequently the volume flow formed from the exhaust gas and the dispersed scrubbing liquid is sent through a scrubbing liquid bath provided in a receptacle (1), which by a gas and liquid permeable retaining element (18) is divided into a lower and upper compartment (19, 20), with the volume flow formed by the exhaust gas and the dispersed scrubbing liquid being introduced into the area of scrubbing liquid bath located below the retaining element (18) and from here bubbling through the area of the scrubbing liquid bath located above the retaining element (18), a high degree of scrubbing can be achieved by the fact that at least part of the dispersed scrubbing liquid to be supplied to the exhaust gas is supplied to an overall exhaust gas flow not yet divided into partial flows.

IPC Classes  ?

• F01N 3/04 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of liquids
• F02M 26/15 - Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
• B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
• B01D 53/78 - Liquid phase processes with gas-liquid contact
• F01N 3/037 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of inertial or centrifugal separators, e.g. associated with agglomerators

Abstract

A movable wall member, in form of an exhaust valve spindle (1) or a piston (7) for an internal combustion engine, comprises a base portion (17, 20) of an alloyed steel having a carbon-content in the range from 0.15 to 0.35 % by weight, and an outer portion (14, 5) forming the surface of the wall member facing a combustion chamber. The outer portion is of a hot-corrosion-resistant alloy, which is nickel-based, chromium-based or cobalt-based. At least one buffer layer (18, 21) of an alloy is located in between the base portion and the outer portion. The alloy of the buffer layer is different from the alloyed steel of the base portion and different from the hot-corrosion-resistant alloy of the outer portion. The alloy of the buffer layer comprises from 0% to at the most 0.09% C in percent by weight of the buffer layer, and that the buffer layer has a thickness of at least 1.5 mm.

IPC Classes  ?

• F01L 3/04 - Coated valve members or valve seats
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• C22C 38/00 - Ferrous alloys, e.g. steel alloys
• F01L 3/22 - Valve seats not provided for in preceding subgroups of this groupFixing of valve seats
• F02F 3/12 - Pistons having surface coverings on piston heads

Abstract

The invention relates to a diesel engine, particularly a two-stroke crosshead large diesel engine, comprising at least one combustion chamber (1), which is enclosed by a cylinder on multiple sides and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall (3; 103) for the combustion chamber (1), wherein the combustion chamber (1) comprises a predetermined breaking point (12) on the outer wall (3; 103) thereof. The invention is characterized in that the predetermined breaking point (12) is suited to protect the diesel engine against possible damage that can be caused by an undesirably high overpressure (py) of gases in the combustion chamber (1) during a malfunction of the diesel engine, wherein the predetermined breaking point (12) has a breaking point pressure (ps) below the overpressure (py) above which damages can be expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. The invention further relates to a predetermined breaking point component and to a method, wherein in order to prevent the damage, at least one predetermined breaking point component of said kind is provided in the outer wall of at least one combustion chamber and/or the diesel engine is designed according to the invention.

IPC Classes  ?

• F02B 77/08 - Safety, indicating, or supervising devices
• F02P 11/02 - Preventing damage to engines or engine-driven gearing
• F16K 17/14 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side with fracturing member

Abstract

The invention relates to a device for machining a contact surface of a bearing seat (5) of a round shaft (3), at least in segments, while the bearing is dismantled (4), having at least one rotatable cutting tool (1) in the gap between the bearing seat (5) and a bearing journal (3) supported therein created by dismantling the bearing (4), particularly of a shaft supported in a sleeve bearing having bearing shells (4), such as a crankshaft of a two-cycle large diesel engine. The device is characterized in that a mounting device (2) is provided for mounting the cutting tool (1) to the bearing journal (3), and is configured so that the bearing journal (3) acts as a rotating tool holder when machining the contact surface of the bearing seat (5), and the cutting tool (1) is guided along the contact surface of the bearing seat (5) in a purely rotary cutting motion, wherein the mounting device (2) is configured for mounting the cutting tool (1) such that it can be released without leaving traces or damage in a force-fit and/or adhesive bond, and comprises an adhesive layer and/or at least one hose clamp. A corresponding device for machining a contact surface of a bearing journal (3) of a round shaft (3) while the bearing (4) is dismantled is further proposed, and a method for machining the contact surface of the bearing seat or the bearing journal using such a device.

IPC Classes  ?

• B24B 5/42 - Single-purpose machines or devices for grinding crankshafts or crankpins
• B23D 77/02 - Reamers with inserted cutting edges

Abstract

A large two-stroke diesel engine (1) with an exhaust valve actuating system including a camshaft (28) and hydraulic pushrods that include a piston pump (32) driven by the camshaft coupled via conduit (36) to a hydraulic exhaust valve actuator (34) for moving the exhaust valve (11) concerned. The camshaft is provided with an exhaust cam (29) for each cylinder, and the exhaust cam is profiled with an increased lift (30) exceeding the lift required for opening the exhaust valve. A portion of the additional volume of hydraulic fluid generated by the increased lift of the hydraulic piston pumps is diverted from the hydraulic push rod and delivered to a consumer of pressurized hydraulic fluid that is associated with the engine. The other portion of the additional volume of hydraulic fluid results in additional exhaust valve lift. The energy stored in the air spring (33) urging the exhaust valve to close is returned to the camshaft during the return stroke of the exhaust valve.

IPC Classes  ?

• F01L 9/02 - Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
• F01L 1/08 - Shape of cams
• F02M 47/04 - Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
• F02M 59/10 - Pumps specially adapted for fuel-injection and not provided for in groups of reciprocating-piston type characterised by the piston drive

Abstract

A large two-stroke diesel engine (1) of the crosshead type includes a low to medium pressure hydraulic system, such as the engine lubrication system and a closed circuit high-pressure hydraulic system. The low to medium pressure hydraulic system is operated with a first level of purity. The closed circuit high-pressure hydraulic system is connected to the low to medium pressure hydraulic system by a feed conduit (14) that includes a filter (16) and a feed pump (18) so that the closed circuit high-pressure system operates with a higher level of purity than the low to medium pressure hydraulic system. The high-pressure hydraulic system is used to operate a plurality of hydraulic linear actuators (12) associated with each exhaust valve and/or a plurality of hydraulic driven fuel injection pressure boosters (11) provided for each cylinder.

IPC Classes  ?

• F01L 9/02 - Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
• F02M 47/04 - Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation

Abstract

A piston ring (6) which is arranged with radial and axial play in an associated piston ring groove (5) in a piston (1) of a reciprocating internal combustion engine can be stabilized to prevent tilting on and contact with the radially outer edge of the piston ring groove (5) by the cross section of the piston ring (6) and/or the piston ring groove (5) being designed in such a manner that a gap is formed between the lower side of the piston ring (6) and the lower supporting surface of the associated piston ring groove (5), said gap opening vertically radially outwards in the radial direction and, when the piston ring (6) is not subjected to a load, remaining open to the outside irrespective of the temperature of the piston (1) for as long as the piston ring (6) is not loaded by pressure on the top side. The effect achieved by this is that, when a piston (1) is deformed under the action of heat during operation, the initial contact between the lower side of the piston ring (6) and the opposite, lower supporting surface of the piston ring groove (5) begins at least in a region of the lower side of the piston ring (6), which region faces the piston axis, and rubbing of the piston ring (6) on the radially outer edge of the piston ring groove (5) is prevented.

IPC Classes  ?

• F16J 9/20 - Rings with special cross-sectionOil-scraping rings
• F16J 9/22 - Rings for preventing wear of grooves or like seatings

Abstract

For reducing the Nox-emission of a large sized two stroke diesel engine having at least one combustion room (3), a reciprocating piston (4) and an exhaust opening (12) controlled by an exhaust valve (13) at each work cyclus a small volume of burnt gas is retained in the combustion room (3) and so added to the fresh air for the next combustion. For achieving this retention of burnt gas the underside of the valve disc (15) off the exhaust valve (13) is provided with a shallow concave face (17) building a basin-like collection room, whose depth is within a range of 2-10 % of the outer diameter of the valve disc (15).

IPC Classes  ?

• F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group

Abstract

A method for detection of pre-scuffing events in a large multicylinder two-stroke diesel engine by recognizing the characteristic temperature fluctuations of pre-scuffing events. The temperature fluctuations are characterized by the time span between their peaks and the magnitude of the fluctuations. Automatic countermeasures may be initiated after detection of the pre-scuffing event. The countermeasures may automatically be ended.

IPC Classes  ?

• F02B 77/08 - Safety, indicating, or supervising devices
• F02D 35/02 - Non-electrical control of engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
• F02D 41/22 - Safety or indicating devices for abnormal conditions

Abstract

A method for detection of pre-scuffing events in a large multicylinder two-stroke diesel engine by recognizing a deviation between the temperature or temperature development of a cylinder relative to the average temperature or average temperature development of the other cylinders. Automatic countermeasures may be initiated after detection of the pre-scuffing event. The countermeasures may automatically be ended.

IPC Classes  ?

• F02B 77/08 - Safety, indicating, or supervising devices

Abstract

A fuel injector for an internal combustion engine comprises at least a housing, a valve seat (21), a valve spindle (16), an atomizer (5), and a cut-off element (27). The atomizer has a central bore (22) from which a plurality of nozzle bores (31) extend through a sidewall of the atomizer. The cut-off element is carried by a shaft on the valve spindle and comprises a first cylindrical section (28) located in the central bore of the atomizer to close fuel access to inlet openings of a first group of nozzle bores, when the valve spindle is in the closed position. When the valve spindle is in the open position, fuel is supplied to at least a second group of nozzle bores through a passage between the circumference of the cut-off element and the central bore of the atomizer. The cut-off element has a second cylindrical section (29) for closing off inlet openings of the second group of nozzle bores when the valve spindle is in the closed position.

IPC Classes  ?

• F02M 53/04 - Injectors with heating, cooling, or thermally-insulating means
• F02M 61/04 - Fuel injectors not provided for in groups or having valves
• F02M 61/18 - Injection nozzles, e.g. having valve-seats

Goods & Services

Machines and machine tools; motors and engines; accessories and spare parts for motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs. Information regarding repair, installation and repair of motors, engines, machines and electric appliances; reconstruction of deteriorated or partially damaged machines and motors and engines; installation, maintenance and repair of machines, motors and engines.

Goods & Services

Exhaust valves for internal combustion engines.

Goods & Services

Exhaust valves for internal combustion engines