Abstract: A unit for supplying fuel to an endothermal engine, the unit comprising a manifold to which injectors are connected in order to supply fuel to the engine, a high pressure pumping device which has its output connected to the manifold and its intake connected to an extraction pump adapted to transfer fuel from the storage tank to this device and a pressure regulator adapted to regulate the pressure of the fuel supplied to the pumping device by supplying surplus fuel along a bleed duct communicating with the tank, the pumping device having at least one piston moving axially within a respective cylinder in order to define a variable volume pumping chamber.

Abstract: In an apparatus for supplying a fuel to a vehicular combustion heater which supplies the fuel from a fuel tank via a fuel pump to the heater which is mounted on an electric vehicle, discharging into atmosphere of fuel vapor from the fuel tank is restricted to the best extent possible. For that purpose, prevention is made of that discharging from the combustion heater of the fuel vapor which is likely to occur when the set pressure for opening a positive pressure valve in a two-way valve for the fuel tank is set high. Interposed in series between the fuel pump and the combustion heater is a one-way valve which opens when the internal pressure in the fuel supply passage has risen to a predetermined set pressure which is higher than the set pressure for opening the positive pressure valve, and a solenoid valve which is opened when the combustion heater is in operation.

Abstract: A fluid metering pump (1) is disclosed which is operated by a source of pressurised fluid, which in the case of a pump for metering fuel, may be the crankcase (37) of a two stroke, crankcase scavenged, internal combustion engine. The metered quantity of fluid displaced by the pump (1) is a function of the pressure of the pressurised fluid and time that the pressure acts on a pumping means (15) of the pump (1). Attenuation of the pressure may be achieved, especially under idle or high engine speed conditions in the case of an engine, by a throttle (35) placed in a conduit (33) communicating an actuation chamber of the pump (1) with the source of pressurised fluid, such as the crankcase of a two stroke engine.

Abstract: A high-pressure fuel supply pump with high performance is capable of securely preventing a cylinder section from seizing up and also permits improved sealing performance to minimize the chance of fuel leakage. The high-pressure fuel supply pump has: a casing (48) having a cylindrical cavity (48a); a sleeve (40) which has a cylinder section (40a) and a fixing section (40c), one end thereof closer to the fixing section (40c) being abutted against the bottom of the cavity (48a); and a piston (53) which is disposed in the cylinder section (40a). The high-pressure fuel supply pump takes in fuel through an intake passage (36) by the reciprocation of the piston (53) into a fuel pressurizing chamber (52) to pressurize it, then discharges the pressurized fuel through a discharge passage (37) to forcibly feed it into a fuel injector of a cylinder injection engine.

Abstract: A fuel supply system for an internal combustion engine mounted in a cowling of a marine device is disclosed. The engine has a body defining at least one combustion chamber and an output shaft arranged to drive a water propulsion device of the marine device. The engine has an intake system supplying air to the combustion chamber. The fuel supply system includes at least one fuel injector providing fuel to the engine for combustion with the air. Various configurations for at least two pumps used to deliver fuel from a fuel source to the fuel injector(s) which contribute to reduced vapor production and improved pumping efficiency are disclosed.

Abstract: A fuel system arrangement for an engine positioned in a cowling of an outboard motor is disclosed. The engine has a first end and a second end and comprises a cylinder block with a cylinder head connected to the cylinder block at the first end of the engine and cooperating therewith to define at least one combustion chamber, and a crankcase positioned at the second end of the engine. The engine includes an intake system for providing air to the combustion chamber, the intake system including at least one intake runner extending along a side of the engine defined between the first and second ends, the runner having a passage therethrough leading to a passage extending through the cylinder head to the combustion chamber. The fuel system includes a fuel supply unit for delivering fuel from a fuel supply to at least one charge former, the charge former arranged to provide fuel to the combustion chamber for combustion therein, the fuel supply unit positioned at the first or second end of the engine.

Abstract: The invention relates to a high-pressure pump for fuel delivery in fuel injection systems of internal combustion engines, which includes a tank, a pre-feed pump, and the high-pressure pump. The pre-feed pump aspirates a total fuel flow from the tank and this total fuel flow is divided into a lubricating flow, which is conveyed through the high-pressure pump for the purpose of lubrication, and a delivery flow, which is acted on with high pressure by the high-pressure pump and is delivered to a common distributor rail. The fuel injection system prevents damage that could occur during operation. Damage is prevented because the total fuel flow is conveyed through the high-pressure pump for the purpose of lubrication, wherein a metering unit for the total fuel flow is provided in the high-pressure pump or in a return and assures that only a predetermined delivery flow is acted on with high pressure in the high-pressure pump.

Abstract: A fluid actuator for use in a fluid injector assembly including a piston arranged for reciprocation in a chamber, the piston including a connected plunger operating in an injection chamber. A control valve member is actuated to apply fluid to the chamber on opposite sides of the piston to reciprocate the piston and plunger. A fluid throttling arrangement is provided to decelerate the piston towards the ends of its stroke. The fluid actuator may also be associated with an engine valve assembly.

Abstract: A piston pump for pumping fuel in which a risk of fuel getting into the area of a shaft seal is limited. The fuel pump includes a separation chamber which is provided between a shaft seal and a fuel chamber that contains fuel. Located in the separation chamber is for instance air as a separator means, and the separation chamber communicates with an air inlet of the engine. This assures that fuel cannot get into the area of the shaft seal or escape to the outside. The fuel pump is suitable in particular for internal combustion engines in which the fuel must be delivered at high pressure.

Abstract: A variable-discharge high pressure pump capable of facilitating the manufacturing and providing sufficient lubrication. The pump comprises a cam shaft provided with a cam surface by which a tappet displaces in accordance with the cam surface, a plunger connected to the tappet to reciprocate in accordance with the reciprocation of the tappet and accommodated in a cylindrical cylinder. Also included are a cylinder head having a contact surface brought into contact with one end surface of the cylinder. The cylinder head has a small-diameter recess portion made in the contact surface to be coupled to the cylinder and constitutes a pump chamber in conjunction with a head portion of the plunger.

Abstract: In this fuel injection system, a larger-diameter portion and a smaller-diameter portion which constitute each intensifying piston are brought into contact with a convex surface, whereby the bending of the smaller-diameter portion can be prevented when an external force exerted on the larger-diameter portion causes it to incline. The smaller-diameter portion and larger-diameter portion are formed separately, urged by a return spring and engaged with each other. Even when an injector body is inclined due to an external force and thermal stress to cause the larger-diameter portion to nearly follow up the inclining of the injector body, a contact point of the flat bottom surface of the larger-diameter portion and the convex top surface formed on the smaller-diameter portion is merely shifted due to the rolling of these surfaces.

Abstract: An improved fuel delivery and injection system for a small watercraft engine reduces the heat effects within an enclosed engine compartment upon various components of the engine and upon the fuel within the fuel system. The fuel system integrates a fuel pump within a fuel tank at a location which minimizes the effects of watercraft leaning. The inlet of the fuel pump desirably corresponds, in the lateral direction, with a position of an inlet to the jet pump unit. In this position, the pump is less likely to draw air as the watercraft maneuvers. The fuel lines also are arranged within the engine to minimize the effect of engine heat produced by the exhaust system on the fuel delivery lines. The arrangement of the fuel pump and fuel delivery lines consequently improves the consistency of the fuel/air ratio within the fuel charge produced by the engine as less air and vapor delivered to the fuel injectors.

Abstract: A cyclic high pressure fluid seal for a fuel injector includes an injector body that defines a cyclic high pressure space connected to a low pressure space by a bore. A member with a pressure face end and a side surface is mounted to reciprocate in the bore between a retracted position and an advanced position. An O-ring is positioned in contact with the side surface of the member and the injector body within the bore. A portion of the member and the bore define a pressure accumulation volume positioned between the O-ring and the pressure face end. The pressure accumulation volume is positioned such that fluid pressure in the pressure accumulation volume changes with that of the cyclic high pressure space.

Abstract: An improved plunger and barrel assembly is provided which includes a plunger reciprocally mounted in a cavity formed in the barrel and a leakage flow reduction device positioned in the cavity for reducing fluid leakage flow around the plunger thus increasing system efficiency. The leakage flow reduction device includes a sealing sleeve removably mounted in the cavity between the plunger and the barrel, which includes a bore for slidably receiving the plunger to form an annular clearance gap between the plunger and the bore. The sealing sleeve is designed to resiliently flex in response to fluid pressure forces to reduce the annular clearance gap so as to minimize fluid leakage through the annular clearance gap. The sealing sleeve is formed as a separate piece from the barrel to permit simple, low cost replacement. The sealing sleeve is preferably applied to a fuel pump having a pump plunger for pressurizing fuel in a high pressure chamber.

Abstract: This invention relates to a fuel pump, and more particularly to a fuel pump for delivering high pressure fuel to a fuel injection system of an internal combustion engine. A fuel pump is provided comprising coupling means (30) mechanically coupling a first pump plunger (1) to a second drive means (14) and a second pump plunger (11) to a first drive means (4) whereby, when the first pump plunger (1) is driven by the first drive means (4) from bottom dead center to top dead center, the second pump plunger (11) is driven by the coupling means (30) from top dead center to bottom dead center, and as the second pump plunger (11) is driven from bottom dead center to top dead center by the second drive means (14), the first pump plunger (1) is driven from top dead center to bottom dead enter by the coupling means (30).

Abstract: A fuel injection pump is proposed, with an annular slide (20) that is displaceable on the pump piston by a governor and that has a control edge by which a relief conduit of the pump work chamber can be opened in the course of the pump piston supply stroke; the relief conduit portion emerging from the jacket face of the pump piston is embodied as a radial bore (18), and the fuel stream emerging from it is deflected by a deflection face (34) on the annular slide or a deflection face (76) on the pump piston, in such a manner that the stream is deflected out of the radial plane, avoiding axially active pressure zones, so that varying axial loads resulting from the various diversion events on one another on the control slide are avoided, and thus fluctuations in injection quantity from one injection event to another and the strain on parts of the governor are reduced as well.

Abstract: In an inner-cam system fuel injection pump, two balance ports that are offset symmetrically relative to a distribution port in a circumferential direction to form a Y-shape are formed at a rotor. The opening ends of the balance ports and the opening end of the distribution port are positioned on the same plane that is perpendicular to the axis of the rotor. The offset angle .theta. by which the balance ports are offset in the circumferential direction relative to the axis of the distribution port, the opening area S.sub.1 of the distribution port and the opening area S.sub.2 of each of the balance ports are set to satisfy a relationship expressed as S.sub.1 =.vertline.2.multidot.S.sub.2 .multidot.cos .theta..vertline.. The phase intervals of the fuel delivery passages and the phase interval of the two balance ports are set equal to each other.

Abstract: A fuel feeding device for a motor vehicle has a fuel container having a plurality of parts with bottoms separated from one another, a fuel feeding aggregate operating from supplying fuel from the supply container to an internal combustion engine, a fuel withdrawing unit provided in one part of the fuel container and connected with a fuel conduit so that the fuel withdrawing unit aspirate fuel from the one part of the fuel container and through the suction conduit also from at least one further part of the fuel container.

Abstract: A fuel injection pump for internal combustion engines, which includes at least one pump piston driven by a cam drive mechanism to carry out a feed stroke and an intake stroke. The pump includes a fuel filled storage chamber that is under storage pressure and is for aspirating fuel in the intake stroke and for feeding excess fuel at the end of the feed stroke to a tank. A fluid filled drive mechanism chamber under lubrication pressure, contains the cam drive mechanism and is divided from the intake chamber by a movable wall. A vacuum chamber is disposed in the fluid filled drive mechanism chamber in order to damp pressure oscillations in the drive mechanism chamber, the vacuum chamber is at least partially defined by a membrane that is acted upon by the lubrication pressure. The rigidity of the membrane is designed so that its effectiveness comes into play only when there is a pressure load that is slightly greater than the stationary lubrication pressure in the drive mechanism chamber (22).

Abstract: An aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle has a feed pump having a disk-shaped feeding member, and means for forming a pump chamber in which the feeding member rotates, the means including a first wall part and a second wall part arranged at a distance from one another in direction of a rotary axis of the feeding member, at least one of the wall parts having a ring portion formed for a radial limiting and connectable with the other of the wall parts, the first and second wall parts and the feeding member which is preliminarily increase in volume are positioned relative to one another without a gap, and thereafter the first and second wall parts are fixedly connected with one another.

Abstract: A fuel injection device with a pump plunger which is driven in reciprocation and a working space which is enclosed by the pump plunger, and is connected to an injection valve connected directly to the pump housing. To control the fuel injection quantity and the injection instant, a solenoid valve is provided which is arranged in a fuel passage that is connected to the pump working space and serves for the filling and/or relief of the pump working space. To reduce the volumes subjected to the high pressure, the fuel passage is arranged in such a way that the fuel passage intersects the cylinder bore which accommodates the pump working space, and the solenoid valve is arranged at the entry of this passage.

Abstract: A number of embodiments of high pressure pumps for internal combustion engines having vertically extending output shafts. In each embodiment, the high pressure pump has its pump driving shaft rotatable about an axis that is parallel to the crankshaft axis and is driven by the crankshaft. This arrangement lends itself to application in outboard motors. The high pressure pump includes an integral lubricating pump for lubricating components of the high pressure pump.

Abstract: A fuel-injection pump of the distributor type has a distributor shaft which is coupled fixedly in terms of rotation to a drive shaft and which, during rotation, successively supplies an injection nozzle with fuel from a pump working space. Seated displaceably in each case in one of a plurality of radial bores in the distributor shaft are pump pistons which, on the one hand, limit the pump working space and, on the other hand, bear non-positively on a coaxial cam ring via rollers held in roller shoes. For a construction of the injection pump which is advantageous in manufacturing terms, the drive shaft engages over the distributor shaft by means of a cup-like coupling head, and a number corresponding to the number of radial bores, of axial slots for the displaceable reception of the roller shoes are made in the cup wall.

Abstract: A fuel injector includes an injector body with a plunger bore that opens to a nozzle outlet. A plunger having a pressure face and a side surface is positioned to reciprocate in the plunger bore between an advanced position and a retracted position. A portion of the plunger bore and the plunger define a fuel pressurization chamber that opens to the nozzle outlet. A needle valve is positioned in the injector body adjacent the nozzle outlet and is moveable between an open position which opens the nozzle outlet and a closed position in which the nozzle outlet is closed to the fuel pressurization chamber. An O-ring is in contact with the side surface of the plunger and the plunger bore on the injector body and serves to seal against fuel leakage past the plunger.

Abstract: An engine injection system for a combined injection of fuel and an auxiliary fluid into a combustion chamber of an internal combustion engine. A fuel injection pump is used for pumping both fuel and the auxiliary fluid at high pressure. The pump communicates with an injection nozzle and, via a magnet valve assembly, with a fluid metering device, which in turn communicates via a metering line with the injection nozzle. Connecting the magnet valve assembly directly to the supply outlet of the fuel injection pump upstream of an equal-pressure valve, and providing a pressure generator in the metering device, given a suitable triggering of the magnet valve assembly, the remaining supply stroke of the pump piston of the fuel injection pump after the end of the fuel injection by the injection nozzle is utilized to generate the requisite metering pressure in the metering device to enable the auxiliary fluid that is to be metered to be stored in the injection nozzle.

Abstract: An internal combustion engine including an engine block including a cylinder head defining a combustion chamber and having therein an opening communicating with the combustion chamber, and a combined fuel injection pump and nozzle including a housing fixed to the cylinder head and defining a high reluctance gap and a low pressure fuel chamber having an axis, a tubular member extending in the housing into the low pressure fuel chamber in coaxial relation to the axis, having therein an axial bore communicating with the low pressure fuel chamber, and at least partially defining a high pressure fuel chamber, and a nozzle assembly fixed to the housing, extending into the opening, communicating with the combustion chamber and with the axial bore, and including a valve member moveable to an open position in response to a fuel pressure in the high pressure fuel chamber above a predetermined level.

Abstract: A fuel system vibration damper. A damper is affixed to the fuel system drive gear in order to counteract torsional vibration produced in the fuel system drive gear by the fuel system, such as a fuel injection system or a fuel pump. The damper additionally dampens the response of the entire fuel system drive train, thereby reducing engine noise due to gear rattle.

Abstract: A fuel injection pump for internal combustion engines, where the driving source is the movement of an axle (11) held at the rod head whenever this is activated by the engine crankshaft (10), adjusting such movement by the use of auxiliary pieces (14, 17, 18), in order to get the alternative lineal movement required by the pump which is composed of a piston formed by four cylindric parts (25, 26, 27, 28), first and third part have an even diameter, second and fourth parts have a shorter diameter, the third part has a peripheric channel along it entire length (29), fourth part has an internal channel (30) with holes towards the periphery. The piston displaces within two consecutive sliding cylinders, the first cylinder (31) forms with the piston the compression chamber and at the time of sliding modifies the time when the injection is done. Second cylinder (32) fits into the fourth part of the piston and at the time of sliding modifies the amount of fuel passing from the compression chamber to the injector.

Abstract: The actuator described herein can be used with those gasoline engine fuel injection systems which maintain a constant value of instantaneous fuel to air ratio throughout each intake stoke of the engine. When used with these fuel injection systems the actuators described herein act to maintain a constant overall fuel to air ratio from one engine cycle to the next over a wide range of engine operating conditions.

Abstract: A variable displacement high pressure pump having a plurality of high pressure pumping units which receive fuel from a low pressure fuel pump. A rotary cam-driven roller tappet, for producing pumping displacement of the pumping plunger of a respective pumping element, is connected to the pumping plunger by a separated link in a manner permitting the pumping plunger to float relative to the roller tappet during at least a portion of each pumping cycle. As a result, the capacity of the pumping chamber can be limited to an extent that is less than the full stroke achievable by the pumping plunger being retracted to the maximum extent which is permitted by the driving cam.

Abstract: A fuel injection apparatus for internal combustion engines, having a pump piston, which is guided in a cylinder bore and driven to reciprocate by a cam drive. The pump piston defines a pump work chamber with its face end. The pump work chamber communicates with an injection valve via a pressure conduit and is supplied with fuel and relieved via a fuel line. The cam drive acts upon the pump piston via a rocker bolt, a tappet bolt, and a tappet insert, and the connections from the tappet bolt to both the rocker bolt and the tappet insert are embodied in the manner of ball joints. For simple installation of the tappet bolt, it is axially secured in relation to the rocker and to a tappet sleeve, which receives the tappet insert, via securing elements having elastic stretching properties, which expand to the size of the outer diameter of the ball head when a certain force is exerted, so that the tappet bolt can be installed and removed without disassembling the whole pump.

Abstract: Mounting and connection arrangement for a fuel injection pump in large reciprocating internal combustion engines, especially in large diesel engines with several cylinders, which include a separate injection pump (1) for separate cylinders and in which the injection pump (1) is supported to a console support (3) or to a corresponding element forming an integral part of or fixed to the engine block. The injection pump (1) is arranged to be fixed on the console support (3) by making use of a support unit (2), which is also provided with guiding members (4,7,8,9) for one or several control or pressure medium systems in association with the operation of the engine. These guiding members can include channels (7,8) for feeding fuel into the pump, guiding members (4) for valve lifting means (5) and/or lubrication channels (9).

Abstract: A fuel injection pump for internal combustion engines, having a pump piston that is axially guided in a cylinder bushing which defines a pump work chamber there and is moved axially by a cam drive counter to the force of a restoring spring. The cam drive comprises a roller tappet connected to the pump piston whose roller rolls off on a cam of a camshaft driven by the internal combustion engine to be supplied. In the process, the roller is connected to the cylindrical part of the roller tappet by means of a roller pin disposed vertically to the axis of the roller tappet. This roller pin is axially secured by means of the contact of its axial ends to the wall of a bore that guides the roller tappet, for which purpose the transition area between the face ends, which extend vertically to the axis of the roller pin, and the circumferential area of the roller pin is part of a circular ring. The radius of the circular ring cross-section is adapted to the diameter of the wall of the roller tappet guide.

Abstract: A cam shaft reduces noise produced by gears used to drive cams of a fuel injection pump. Conventionally, the gear noises are caused by negative torque of a cam shaft. A cam profile of each cam which lifts a plunger of the fuel injection pump is shaped like a fan. There are formed two cams in a single cam shaft. A lift increment segment of a first cam overlaps a lift decrement segment of a second cam to prevent a negative torque.

Abstract: A fuel injection pump for internal combustion engines having a cup-shaped pump housing and a pump head enclosing the housing. The pump head has a cylinder in which a pump piston, which is set into simultaneous reciprocating and rotary motion by a cam drive, in the course of which it simultaneously acts as a distributor, encloses a pump work chamber that is filled with fuel upon an intake stroke and communicates with one of a plurality of injection lines upon the supply stroke. The resultant reaction forces and moments are supported according to the invention via a roller race supported directly on the pump head, and as a result the induction of force to the pump housing can be avoided.

Abstract: A fuel flow arrangement has a fuel feed line (14) for feeding fuel from a tank (10) to an engine (12) with a fuel injection pump (20) by means of a pump (18), and a fuel return line (16) for returning excess fuel from the engine to the tank. A bypass passage (21) with an orifice (22) provides a communication between the feed and return lines and a flow restriction (24) is provided in the return line. When the fuel pressure created by the pump (18) is low, at low temperatures, fuel entering the return line will be recycled through the orifice (22) to the engine to increase the temperature of the fuel feed to the engine, and at higher temperatures, the flow through the orifice (22) will be reversed.

Abstract: A fuel injection pump for internal combustion engines with a plurality of pump elements in which the fuel injection quantity is varied via a governor rod, which is supported in a U-shaped guide rail; according to the invention, this guide rail is loaded in its middle region by at least one spring element, in order to prevent transverse vibration of the governor rod.

Abstract: There is disclosed an improved cam for a fuel injection pump. The cam has a mountain-like cam projection at its surface disposed in contact with a roller. The cam projection has a lift region extending from a leading end thereof to a peak thereof. At the lift region, the cam is lifted in response to the rotation of the cam, so that a plunger is moved to pressurize fuel in a pump chamber. The lift region has first, second and third angle portions arranged in this order from the leading end of the cam projection toward the peak of the cam projection. The first angle portion serves to increase a lift speed of the cam, and terminates in a position where the lift speed becomes the maximum. The second angle portion serves to lower the lift speed. The deceleration is greater at an initial section of the second angle portion than at a final portion of the second angle portion.

Abstract: A fuel injection pump for internal combustion engines comprising a pump housing, a distributor piston guided axially and rotatably, a rotating drive shaft supported in the pump housing, a transmission coupling the drive shaft to the distributor piston and a claw clutch and an eccentric disk rolling on a roller race with cams, and a lubricating oil circulation loop, which has a lubricating oil feed line discharging into a lubricating oil groove and a lubricating oil return line that returns from the transmission chamber which is partly filled with lubricating oil. To assure adequate supply of lubricating oil to the heavily loaded drive faces of the claw clutch, there is a flow lubricating oil through the drive shaft from the lubricating oil groove on into the claw clutch; via lubricating oil openings in at least those claw faces of the claw clutch that transmit a torque, the flow emerges into the transmission chamber.

Abstract: A fuel injection pump for internal combustion engines has a pump and distributor plunger (21) actuated by a cam plate (12) performing a rotary lifting movement. The cam plate (12) is coupled to the drive shaft for joint rotation therewith. The cam plate has face cams (14) thereon engaging rollers (16) guided in a substantially stationary roller ring (17). For the purpose of detecting the speed and the radial position of the drive shaft (11), a radial position transmitter is provided which has a transmitter wheel (36) firmly connected in the direction of rotation with the drive shaft (11) and which has a detector (37) scanning the transmitter wheel (36) and fixed in the roller ring (17). The roller ring is held on the drive shaft (11) by a ball bearing (41). Thereby uncontrolled relative movements between detector (37) and transmitter wheel (36) are eliminated, and the angular rotational position as well as the speed of the drive shaft (11) can be detected with a high degree of accuracy.

Abstract: An internal combustion piston engine for operation with gaseous and/or liquid fuel comprises at least first and second working cylinders associated with each other, with their working pistons movable in opposite relationship, and a fuel supply system which is operable to compress the fuel and which for each working cylinder has a piston compressor associated therewith at the cylinder head end. Each compressor has a cylinder and a differential piston axially movably accommodated in the compressor cylinder. The larger surface of the differential piston is subjected to the pressure in the combustion chamber of the associated working cylinder while the smaller surface of the differential piston is operable to compress the fuel when the pressure rises in the working cylinder combustion chamber.

Abstract: A fuel pump arrangement for a marine propulsion system, such as a stern drive or inboard system, includes a fuel pump mounted adjacent a water pump. The water pump includes an input shaft which is rotatably driven in response to operation of the engine, and a cam member is mounted to the water pump input shaft. The fuel pump includes an actuator member which is maintained against the cam member, so that rotation of the water pump input shaft results in reciprocating movement of the actuator member, thus operating the fuel pump.

Abstract: A fuel injection pump includes a barrel mounted in a barrel mounting hole in a pump body. The barrel has a cylinder hole and a valve mounting hole which are coaxial with the barrel. The inner peripheral surface of the cylinder hole and the inner peripheral surface of said valve mounting hole are interconnected by an annular shoulder surface. A plunger is slidably received in the cylinder hole, and a delivery valve is mounted in the valve mounting hole. The delivery valve includes a valve seat, and a valve holder which is tightly threaded into the valve mounting hole, so that the valve seat is firmly held between the valve holder and the shoulder surface of the barrel. One end face of said valve seat is held in direct contact with the barrel shoulder surface under a high pressure.

Abstract: A fuel injection pump for internal combustion engines having housing with a plurality of in-line pump elements including pump cylinders, surrounded by separate suction chambers and communicating with them by means of overflow openings, having two primary conduits disposed parallel to a camshaft for the inflow and outflow of fuel to and from the separate suction chambers and having defined connecting conduits between each separate suction chamber and each primary conduit by means of which the same quantity of fuel is metered to all the separate suction chambers under the influence of a pressure drop produced by the connecting conduits wherein an inflow connecting conduits has one fuel inflow throttle insert for the fuel inflow primary conduits the throttle insert being closed at one end and discharges with its open end into the separate suction chamber with its closed end protruding into the fuel inflow primary conduit the throttle insert having a defined throttle opening for conducting fuel from the primary c

Abstract: A unit injector comprising a plunger, a high pressure fuel chamber defined by the tip face of plunger, and a fuel supply port open to the high pressure fuel chamber when the plunger is at the fuel compressing operation start position. A variable volume chamber filled with fuel is provided, and the volume of the variable volume chamber is controlled by a piezoelectric element. A spill valve is also provided for spilling out the fuel in the high pressure fuel chamber to stop the fuel injection, and is controlled by the fuel pressure in the variable volume chamber. A fuel charging port connected to the variable volume chamber is open to the plunger bore at a position remote from the tip face of the plunger on a side opposite to the high pressure fuel chamber, and the variable volume chamber is charged with fuel via the fuel charging port.

Abstract: Fuel injection pump for internal combustion engines with several pump elements located inline, wherein the commencement of injection of each of these pump elements takes place by a control spool axially displaceable on the pump piston and by control of relief ducts provided at the pump working spaces of the pump, the control spools are operated by a torque shaft which is formed in two parts, the first shaft part is axially secured, and the second shaft part is guided so as to be sealed in a bearing bush located in the pump casing. The two shaft parts are pushed one into the other by means of a trunnion and a blind hole which receives the trunnion. The shaft parts are rotationally connected to one another by means of a claw clutch.

Abstract: A fuel injection pump for internal combustion engines, in particular having a plurality of linearly aligned pump elements, the pump injection onset is determined by one control slide per pump element in which the control slide is axially displaceable on the pump plunger and by a control of relief conduits of the pump work chambers. The control slide is actuated via a torque shaft in that a respective adjusting bolt of a straddling element joined to the torque shaft engages a cross groove of the control slide. The adjusting bolt has a cylindrical stud portion and a slide shoe supported thereon, and the slide shoe is secured against axial displacement by means of a head of the adjusting bolt.

Abstract: A fuel injection pump for internal combustion engines, having a plurality of in-line pump elements in which the supply onset is effected by means of control slides, one of which is axially displaceable on each of the pump pistons and by controlling relief conduits of the pump work chambers. The control slides are actuated via a torque shaft in that via driver tangs which are secured to the torque shaft by fastening parts screwed to the torque shaft, the control slides are axially displaced upon rotation of the torque shaft. For adjusting the stroke or axial position of the individual control slides to one another, spacer means, in particular shims are provided between the fastening part and the torque shaft in the stroke direction of the control slides.

Abstract: A plug-in pump, which is controlled by a beveled edge, is inserted in a pump installation bore of the internal combustion engine with the aid of an adjusting arrangement and ensures a uniform feed quantity in all plug-in pumps of an engine without subsequent feed quantity adjustment. When the feed quantity adjusting element is fixed in the testing position, the plug-in pump, which is inserted in the test base, is rotated until the feed quantity corresponds to the desired feed quantity and a positioning peg of the adjusting arrangement, which is supported in the flange of the plug-in pump and received by a recess in the test base, is adjusted and fixed in this rotational position. When the control rod of the engine is blocked in the basic testing position, a positioning groove (33) of an adjusting plate (32) of the adjusting arrangement is put into a corresponding rotational position by means of a pump dummy.

Abstract: A camshaft for a fuel injection pump of internal combustion engines, having reinforcements formed concentrically or following parallel to the cam outline and located adjacent the cams, and/or these and the camshaft bearings having a diameter enlarged in respect to the shaft diameter.