Abstract: A coupling device for use in diesel fuel injector pumps having a plurality of rotary pumps connected to a drive shaft and positioned in a housing along a longitudinal axis and having a generally cylindrical weight retention housing for rotatably supporting a plurality of flyweights which are coupled to a fuel control system. The coupling device employs an annular drive ring adjacent to the weight housing for engaging the drive shaft and a plurality of drive pins connected to the weight housing and projecting through elongated apertures in the drive ring. A plurality of resilient inserts are positioned within the elongated apertures immediately adjacent to the drive pins so as to occupy substantially all aperture volume not occupied by the pins.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a spring loaded fuel quantity control member which is moved by increasing fluid pressure in a chamber to reduce the amount of fuel supplied. The pressure in the chamber is controlled by a pair of ON/OFF valves, the first valve admitting fluid to the chamber and the second valve allowing fluid to escape from the chamber. When the valves are closed an hydraulic lock is created to prevent movement of the member by mechanical forces applied to it during operation of the apparatus.

Abstract: A rotary valve assembly for fuel injectors which can effectively prevent highly pressurized drain waves from propagating into an extended metering groove. The assembly comprises a cylindrical housing having a plurality of fuel ports formed in the cylindrical wall and a metering port formed in the end wall, each of the fuel ports being connected with respective fuel injectors, and a rotary spool rotatably mounted within the housing defining a metering chamber between one end face thereof and the end wall of the housing. The rotary spool has formed therein a fuel supply passage connected at one end with a fuel supply source and at the other end selectively connectible with either one of the fuel ports. The rotary spool further has formed therein an extended metering groove and a drain groove spaced circumferencially from the metering groove.

Abstract: A fuel injection pump is proposed in which the fuel supply quantity supplied to the injection location is determined by metering the quantity of fuel aspirated. The metering of the aspirated quantities is effected with the aid of at least one magnetic valve which is located in the fuel supply line leading to the fuel injection pump and with the aid of a control edge moved in synchronism with the rotation of the fuel injection pump, which controls the communication between the fuel supply line and the pump work chamber in series with the magnetic valve. The opening times of the two control locations are each longer than the maximum metering time, the overlapping time of the two control times determining the opening time of the communication between the fuel supply and the pump work chamber. The metering time is thus determined on the one hand by the switching time of the control edge moved in synchronism with the rpm and the other by a switching process of the magnetic valve.

Abstract: A liquid fuel injection pump of the rotary distributor type has a first groove on the distributor member for registration with fuel supply ports and a second groove for registration with outlet ports. The grooves are connected to the plunger bore and as the distributor member rotates fuel is supplied to the bore through the first groove and delivered to an outlet through the second groove. The distributor member is axially movable to control the quantity of fuel delivered and in the excess fuel position the second groove is arranged to register with a vent port during the initial period of registration of the first groove with an inlet port. This allows air to be purged from the passage and bore.

Abstract: A liquid fuel pumping apparatus of the rotary distributor type has a rotary distributor which is also axially movable to determine the quantity of fuel supplied by the apparatus. Inclined stop surfaces are provided to limit the outward movement of the pumping plungers during the filling strokes and an axial reaction is applied to the distributor member when the surfaces engage. The axial position of the distributor member is controlled by applying fluid pressure to one end thereof, the fluid being supplied to a chamber. A supply pasage to the chamber includes a check valve and escape of fluid from the chamber is controlled by a sleeve which covers a port. When the axial reaction is applied the port is closed by the sleeve and the check valve closes to form a hydraulic lock.

Abstract: A fuel pumping apparatus of the rotary distributor type has a spill control sleeve mounted on the distributor member. The sleeve is axially movable to vary the quantity of fuel delivered by the apparatus and in addition the distributor member is also axially movable by means of a pressure responsive piston, the pressure applied to which varies in accordance with the speed of the associated engine.

Abstract: A distributor type fuel injection pump of the invention includes a rotor, a pair of plungers reciprocated in the rotor, the pair of plungers defining a pump chamber therebetween; a shuttle cylinder; a shuttle piston, movably located in the shuttle cylinder, for dividing the interior of the shuttle cylinder into first and second pressure chambers, the second pressure chamber being always connected to the pump chamber, thereby pressurizing the fuel in the second pressure chamber by pressurization of fuel in the pump chamber by the plungers and moving the shuttle piston to pressurize the fuel in the first pressure chamber; a distribution head for distributing and supplying the pressurized fuel in the first pressure chamber to each combustion chamber of the engine; a control rod for mechanically adjusting an initial position of the shuttle piston when the fuel is supplied to the first and second pressure chambers; and a spill hole for spilling the fuel in the second pressure chamber when the shuttle piston is mov

Abstract: A fuel injection pump has a rotary and axially slidable distributor member housed in a sleeve in which is formed a series of outlet ports and a series of inlet ports the two series of parts being in axially spaced planes. The distributor member has an outlet groove for registration with the outlet ports in turn and an inlet groove for registration in turn with the inlet ports. The two grooves communicate with a pumping plunger bore so that as the distributor member rotates fuel will be supplied to the bore through an inlet port and the inlet groove and will flow from the bore through the outlet groove and an outlet port. Interconnected balancing grooves are provided on the distributor member for communication with the outlet ports and inlet ports respectively to ensure that following delivery of fuel through an outlet port, that port will be connected to an inlet port before the next delivery of fuel through the port takes place.

Abstract: A fuel injection apparatus comprising a radial piston distributor pump is described, which has first pump pistons in a first radial plane and second pump pistons in a second radial plane the pump pistons being diametrically opposite one another and those of the first radial plane being offset in the rotational direction from those of the second radial plane, and the pump pistons of both radial planes being driven by a common cam ring. The fuel positively displaced by the pump pistons is delivered via a common pressure line to a first distributor opening and a second distributor opening, which are disposed spaced apart by 135.degree. from one another on the jacket face of the distributor of the radial piston pump and which supply fuel injection lines with a pre-injection quantity and a main injection quantity of fuel.

Abstract: A fuel injection pumping apparatus of the rotary distributor type includes a rotary distributor member which is biased axially in one direction by a spring and is movable in the opposite direction by fluid pressure in a chamber. The axial setting of the distributor member determines the amount of fuel delivered by the apparatus. Fuel is supplied to the chamber through a supply path including a port and a groove which register intermittently as the distributor member rotates. Fuel is allowed to drain from the chamber through a drain path which includes a further port and a tapered groove defined by the distributor member and an axially adjustable sleeve surrounding the distributor member. The further port and the tapered groove register intermittently and it is arranged that the supply path and the drain path are closed to create a hydraulic lock in the chamber during the time mechanical forces are applied to the distributor member.

Abstract: A fuel injection pump has a work space which at a certain position of the pumping piston communicates with a tapping opening through which delivered fuel flows into an offtake space. The angular position at which the connection between the pumping space and the fuel offtake space is established, is adjustable in order to control the amount of injected fuel. The fuel offtake space is adjustable by means of a spring-biased piston. The position of the tapping opening to a distributing channel is adjustable by a movable supporting member communicating with a rotary distributor.

Abstract: A fuel injection pumping apparatus of the rotary distributor type has a positively reciprocated pumping plunger slidable in a bore in the distributor member which is housed in a body part. The body part has a cylinder housing a piston resiliently biased towards an end wall. A recess in the end of the piston presented to the end wall can be connected to the bore by the plunger at a variable position during the delivery of fuel by the plunger and the cylinder has an enlarged end portion adjacent the end wall. The enlarged portion communicates with the bore during the pumping stroke of the plunger and rapid termination of fuel delivery is obtained when the recess is connected to the bore, due to movement of the piston away from the end wall.

Abstract: A sintered cam ring is secured to the inner surface of a cylindrical body by means of a bolt. A fuel injection pump has a rotor which supports a roller rotating along the inner surface of the sintered cam ring and is driven by an engine. The sintered cam ring is provided in the outer surface thereof with a groove extending along the central axis thereof. A positioning member for fixing the position of the groove and that of a pin hole formed in the body for receiving a bolt is inserted such as to stretch between the groove and the pin hole. Further, a bolt is employed to secure and tighten the positioning member fitted in both the pin hole and the groove from the outside of the body.

Abstract: A fuel injection system for internal combustion engines has a rotary valve device driven in synchronism with a cam shaft of the engine to distribute high-pressure fuel to unit injectors of the engine. The rotary valve device comprises a rotary spool having fuel supply port and a plurality of fuel metering grooves formed on the circumference of the spool. The fuel metering grooves are respectively provided with check valves. The rotary spool further comprises a pressure relief port for draining part of fuel accumulated in each of the unit injectors and a fuel supply pipe connected between the rotary valve device and the unit injector. The pressure relief port is formed on the circumference of the spool and between the fuel supply port and the fuel metering grooves.

Abstract: A fuel injection pump for an internal combustion engine has a shaft rotatable by the engine. The shaft is formed therein with a radial bore and an axial bore communicated therewith. Pumping plungers are slidably disposed in the radial bore to cooperate therewith to define a compression chamber and cyclically reciprocated to vary the volume of the compression chamber. An injection plunger is slidably disposed in the axial bore to divide the interior thereof into a first pressure chamber always communicated with the compression chamber and a second pressure chamber adapted to be communicated with a delivery port in a discharge stroke of the pump. The first and second pressure chambers are supplied with fuel in a suction stroke of the pump. The fuel in the second pressure chamber is discharged therefrom in the discharge stroke. A single solenoid valve is provided to control the fuel discharge timing and the quantity of fuel to be discharged from the pump.

Abstract: A distributor injection pump for internal combustion engines includes a high pressure pump for generating fuel injection pressure, a slide valve for defining fuel amounts to be injected and a piezoelectric adjustment member which actuates via a control chamber filled with fuel the slide of the slide valve. To prevent fomation of bubbles in the control chamber a rinsing conduit is provided, connected to the control chamber to rinse the latter. The rinsing conduit includes one portion connected to a fuel supply line and the other portion connected to a fuel return line leading to a fuel container.

Abstract: A fuel injection pump for internal combustion engines is proposed, which is embodied as a radial-piston/distributor pump, having an axially fixed and rotationally driven distributor, on the end of which that is remote from the drive and protrudes freely out of the distributor cylinder guiding the distributor an annular slide is disposed, which can be both rotated and axially displaced by means of adjusting drives. Both the quantity adjustment and control of the instant of injection are effected in a electrically controlled manner by relief openings provided on the distributor and control openings which are provided on the annular slide. All of the foregoing can be effected precisely on the end of the distributor which is free of moment.

Abstract: A fuel injection pump for internal combustion engines is proposed, which is realized as a radial piston pump. To supply eight-cylinder engines or multi-cylinder engines at high rpm or to realize a pre-injection with large angular intervals, a radial piston pump is proposed the pump pistons of which are firmly connected to the roller shoes driving the pump pistons, and the rollers carried by the roller shoes roll off simultaneously on a first cam track of a first, outer roller ring and on cam tracks of second, inner roller rings and are thereby compulsorily guided between the cam tracks of the two roller rings.

Abstract: A liquid fuel pumping apparatus for supplying fuel to an internal combustion engine has a rotary distributor member in which is mounted a plurality of pumping plungers which are engaged at their outer ends by cam followers which engage the internal surface of a cam ring. The distributor member is axially movable to vary the quantity of fuel supplied. Each follower includes a roller and a shoe and in order to reduce the amount of material required to produce the cam ring, the rollers are of a length substantially equal to the width of the cam ring and are held against axial movement relative to the cam ring. The shoes are held against axial movement relative to the distributor member. The width of the cam ring and the roller are such that the safe Hertzian stress in the cam ring is not exceeded, the additional width of the cam ring to accommodate the movement of the distributor member in previous designs not being required.

Abstract: A rotary fuel injection pump with a rotor having pumping plungers reciprocated for supplying high pressure charges of fuel for fuel injection and a spill control mechanism having one or two rotary spill valves mounted on the rotor and rotated in unison with the rotor and in synchronism with the reciprocable movement of the pumping plungers for spill control of the high pressure charges of fuel. The spill timing is adjustable by the spill control mechanism at the beginning and/or end of the fuel injection event.

Abstract: A fuel pumping apparatus for supplying fuel to a compression ignition engine includes a positively reciprocated plunger which during a pumping stroke displaces fuel from a first pump chamber to an outlet and draws fuel into a second pump chamber. The apparatus includes an inlet chamber from which fuel is supplied to the second pump chamber, and a diaphragm pump which draws fuel into the inlet chamber through a fuel inlet. The pump drive shaft extends through the inlet chamber and carries vortex creating means whereby air entering the inlet chamber will collect around the shaft to cause early starvation of fuel supply to the associated engine in the event substantial quantities of air enter through said inlet.

Abstract: A fuel injection pumping apparatus of the rotary distributor type has a distributor member rotatable within an angularly adjustable sleeve carried in the body of the apparatus. The sleeve is coupled to an angularly adjustable cam ring having internal lobes operable to impart pumping movement to a plunger carried in a bore in the distributor member. The distributor member has a delivery passage connected to the bore for registration with outlets in turn to the sleeve. The distributor member also has a further and restricted passage which registers with the outlet which has just received fuel for the purpose of absorbing pressure waves which may be reflected back to the outlet from the associated injection nozzle. The fact that the sleeve and cam ring are connected to each other means that as timing variation is effected by moving the cam ring angularly the phasing between the outlets, the delivery passage and the further passage remains constant.

Abstract: A fuel injection pump is proposed in which the fuel metering takes place during the intake stroke of the pump pistons via a fuel supply line in which a switching valve is mounted, which is opened upon the onset of the intake stroke of the pump pistons, closes in the course of this intake stroke and with this closing point also determines the injection onset upon the ensuing supply stroke of the pump pistons. The quantity of fuel to be injected is then limited by means of a pump-guided control edge, which is disposed on an annular slide provided on a free end of the distributor of the fuel injection pump; when a first control opening on the distributor which communicates with the pump work chamber coincides with a second control opening on the annular slide, the pump work chamber is relieved. The diversion or gradual shutoff point is controlled in the course of the compression stroke movement of the pump pistons by means of the relative rotation of the working point of the second control opening.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a positively reciprocated plunger which during movement in a fuel delivery direction displaces fuel from a first chamber and draws fuel into a second chamber and vice versa. The fuel displaced from the first chamber is used to displace a shuttle towards one end of a cylinder from which extends an outlet. Fuel displaced from the second chamber is used initially to displace the shuttle away from the one end of a cylinder until a control valve is closed and is then supplied to an accumulator which before the control valve is closed supplies fuel to the first chamber.

Abstract: A distribution type fuel injection pump includes a control cylindrical bore into which a control plunger is fitted. The control plunger partitions the control cylindrical bore into first and second chambers. The same pressure as that of fuel in the pumping chamber (which serves to feed fuel) is transmitted to the first chamber, while fuel is supplied to the second chamber through a control passage. An electromagnetic valve is arranged in the control passage and the amount of fuel with which the second chamber is filled is adjusted by controlling the electromagnetic valve.

Abstract: A fuel injection pump in which for the purpose of controlling the injection quantity and in particular to determine the onset and end of injection, a hydraulically actuatable piston slide is provided, which controls a connection between the pump work chamber and a fuel supply line or the fuel supply container. The control is effected via two magnetic valves acting in opposite directions, by means of which two different, high control pressures acting upon the piston slide can be exerted. The control pressures are made available either with a single pressure control valve and by blocking off the relief of the supply side of the fuel supply pump, or else by means of two pressure control valves.

Abstract: A rotary distributor pump has a radial bore mounting a pumping plunger at the outer end of which is a shoe carrying a captive roller engageable with the internal surface of a cam ring. The plungers are coupled to the shoes by a clip and further cam surfaces are provided engageable by the outer ends of the rollers. The plungers can therefore be positively reciprocated within the bore.

Abstract: In a fuel injection pump, an engine drives a rotary plunger having an axially extending bore connected to a compression chamber, plural fuel inlet ports alignable with an inlet passage for introducing fuel to the compression chamber, fuel distribution ports for distributing the compressed fuel through the bore to each one of the fuel delivery passages and plural spill ports. A spill-port timing control unit is provided comprising a stator core, a coil wound on thereon, a magnetized ring having a spill groove, and a spring for resiliently maintaining the ring in a reference angular position with respect to the stator core. The magnetized ring is mounted on the plunger so that it can rotate from the reference angular position to an angularly displaced position in proportion to the magnetic flux of the coil to align the spill groove of the ring with each spill port of the plunger to create a passageway through which the compressed fuel is allowed to escape at the termination of fuel injection.

Abstract: A fuel injection pumping apparatus of the rotary distributor type includes a cam ring the angular setting of which can be adjusted to determine the timing of delivery of fuel. In order to adjust the setting of the cam ring first and second fluid pressure operable pistons are arranged in parallel side by side relationship and are each coupled to the cam ring by a radial arm. The first piston is subject to a speed dependent pressure generated within the apparatus to provide normal speed advance and the second piston under the control of a valve can be subjected to said pressure to give full advance when the associated engine is cold and up to a predetermined engine load.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprises a rotary distributor member having a transverse bore mounting pumping plungers arranged to be moved inwardly by cam lobes on a cam ring. The outward movement of the plungers is controller by varying the axial position of the distributor member. Fuel flows from the bore by way of a delivery passage to an outlet and also when the distributor member is set to provide low fuel delivery through a restricted passage and a flow channel. The period in terms of degrees of rotation of the distributor member for a given displacement of fuel through the outlet is extended as compared with an apparatus in which the restricted passage and flow channel are not provided. The cam ring is also angularly adjustable and the restricted passage and flow channel are positioned so that flow of fuel through the restricted passage ceases as the cam ring moves angularly with increasing speed.

Abstract: A distributor type fuel injection pump of the present invention is of the Lucas type having a rotor rotatably driven by an engine but not reciprocated. Spill ports of the same number as that of the cylinders of the engine communicating with a pump chamber are opened at an equal peripheral interval on the outer peripheral surface of the rotor, and a spill ring to cover the spill ports is slidably mounted on the outer peripheral surface of the rotor. A spill groove is formed to extend axially on the inner peripheral surface of this spill ring. One edge of the spill groove, which initially meets the respective spill ports during the pressurizing step for pressurizing the fuel in the pump chamber, is inclined to the axis, and the other edge of the spill groove is parallel to the axis.

Abstract: A cam shaft operated fuel injector having an elongated fuel injection nozzle, a linear pumping plunger with an axis normal to the axis of the nozzle in two embodiments and parallel to the axis of the nozzle in three embodiments and ball check valve means for the pumping plunger arranged to minimize the high pressure chamber volume and to simplify the design and assembly of the unit injector. One embodiment employs an inlet metering valve, another embodiment employs end of injection spill control and another embodiment is adapted for receiving a metered charge of fuel from a separate low pressure distributor pump having a governor controlled linear metering valve and a sleeve like distributor rotor surrounding the metering valve.

Abstract: A high-pressure fuel injection system for a diesel engine including a plurality of main pumps for injecting fuel each located at one of cylinders of the engine and formed with a fuel injection port, a metering and distributing pump formed with fuel discharge ports corresponding in number to the cylinders of the engine for discharging fuel to be injected in timed relation to the rotation of the engine, a plurality of injected fuel metering valves for metering the fuel to be injected before introduction into the metering and distributing pump, a plurality of pipes for fluidly connecting each of the main pumps for injecting fuel with each other discharge ports of the metering and distributing pump, and an actuating mechanism connecting the engine with each of the main pumps for injecting fuel to actuate each of the main fuel injection pump for injecting fuel in timed relation to the rotation of the engine.

Abstract: A member is formed with first and second cam protrusions. First and second movable plungers define a common pumping chamber, the volume of which varies in accordance with the position of each of the plungers. The plungers alternately engage the cam protrusions and are reciprocated thereby in synchronism with rotation of an engine crankshaft. Fuel is supplied to the pumping chamber as the pumping chamber expands. The fuel is directed out of the pumping chamber toward an engine combustion chamber to effect a fuel injection stroke as the pumping chamber contracts. The timing of engagement of one of the plungers with one of the cam protrusions and the timing of engagement of the other plunger with the other cam protrusion are offset by a preset angular interval with respect to rotation of the crankshaft, the interval being chosen so that the rate of fuel injection during an initial stage of the fuel injection stroke is relatively small.

Abstract: A fuel injection pump including an injected amount determining high pressure chamber for determining an injected amount of fuel and an injection timing determining high pressure chamber for determining an injection timing of fuel, with the high pressure chambers being provided independently of each other. A shuttle is disposed in at least the injected amount determining high pressure chamber to form an injection fuel chamber and a pressurization chamber. The injection timing determining high pressure chamber is disconnected from the pressurization chamber in the supply process of fuel for determining the injected amount and fuel for determining the injection timing, and the injection timing determining high pressure chamber is communicated with the pressurization chamber in the fuel injection process. The shuttle for determining the injection timing is not influenced by the fuel for determining the injected amount at the time when the fuel for determining the injected amount is supplied.

Abstract: A bypass restrictor arrangement is provided for use in a distribution valve to control the rate of bypass flow thus effectively reducing cavitation in a fuel system at the end of the injection stroke. Others primarily rely on operation at low system pressure or they rely on a relief valve to maintain a predetermined pressure level in the bypass passage. In the subject arrangement, an orifice is located in a bypass port of a rotor prior to the bypass fluid communicating with a low pressure chamber. Furthermore, the low pressure chamber is maintained at a predetermined pressure level by a relief valve. This arrangement ensures that the rate of fuel flow during bypass is controlled while also flushing and/or controlling the size of any entrained air bubbles or voids thus increasing the efficiency of the fuel system.

Abstract: In the use of fuel injection pumps, a distributing rotor is often utilized to sequentially deliver fuel from an inlet to a combustion chamber on an engine in combination with one or more reciprocating high pressure pistons. Due to the positioning of the various passages through which the fuel is directed, cavitation of the pump is often experienced which has a very serious effect on the life of the components within the pump. The fluid distribution apparatus of the present invention provides a single delivery passage between the pumping chambers of the reciprocating pistons and the distributing rotor. With this arrangement, fluid that is communicated from the bore to the pumping chambers in response to the intake stroke of the pistons is directed back through the same passage during the pressurization stroke of the pistons. The positioning of the single delivery passage prevents the fuel injection pump.

Abstract: A rotary fuel injection pump with a rotor having pumping plungers reciprocated for supplying high pressure charges of fuel for fuel injection and a spill control mechanism having one or two rotary spill valves mounted on the rotor and rotated in unison with the rotor and in synchronism with the reciprocable movement of the pumping plungers for spill control of the high pressure charges of fuel.

Abstract: A spill control system for a distributor pump employs an axially positionable valve member to control the passage of diverted fuel through a spill passage. The valve member is axially displaced by an actuator pin mounted to the cam ring which actuates the pump plungers. A cam surface which rotates with the pump rotor engages the actuator pin. The valve member is also angularly positionable for controlling the passage of diverted fuel. The diverted fuel is spilled to the housing interior or in one embodiment may be recouped and redirected to the fuel inlet passage in the rotor. A check valve is employed to prevent the passage of diverted fuel until the injection pressure of the diverted fuel exceeds a pressure in excess of the maximum transfer pressure of the pump.

Abstract: A fuel injection system (FIG. 1) provided with pump/nozzles is proposed, which has a central fuel metering device which functions with a deviation or metering piston and a distributor or multi-way valve as a metering control member.

Abstract: A fuel injection pump for internal combustion engines in which by means of an obliquely extending control groove on the jacket face of a distributor, the end of injection can be varied by opening a relief conduit during the displacement of the distributor. The injection onset is made to follow this variable end of injection by providing that the stroke position of the pump pistons of the fuel injection pump is ascertained at the end of injection by a transducer, by means of which at the same time a metering duration of a magnetic valve that has already been opened at the time of the end of the injection stroke is controlled. In this manner, with a radial piston pump so embodied, the opportunity is afforded of accurately adjusting the quantity of fuel to be metered by means of a magnetic valve, even with variable injection times. All that needs to be done is that the magnetic valve be closed exactly and rapidly at the end of metering, while an error in opening on the part of the magnetic valve does not occur.

Abstract: Previously disclosed distributor fuel injection pumps for internal combustion engines offer the advantages of reduced size, weight, and cost of a fuel injection system. However, these pumps have not been able to provide relatively high fuel injection pressures which could improve fuel combustion for better fuel economy and lower noxious emissions. In contrast, the subject distributor fuel injection pump generates relatively high fuel injection pressures in a relatively compact arrangement. A semi-spherical nutator member freely rotatably mounted on an oblique journal of a drive shaft imparts high speed harmonic motion to at least one reciprocating pump plunger for pressurizing the fuel. A relatively large semi-spherical bearing interface between the nutator member and a pump housing accommodates very high pumping reaction loads.

Abstract: A fuel injection pump serves to periodically inject fuel into an internal combustion engine. A movable control member serves to determine the quantity of fuel injected during each fuel injection stroke in accordance with the position of the control member. A permanent magnet is movable together with the control member. A stationary magnetically-permeable member serves to conduct magnetic flux generated by the permanent magnet. The magnetic flux conducted by the magnetically permeable member depends on the position of the control member. A Hall element unit serves to sense the conducted magnetic flux and generate a first signal indicative of the actual position of the control member. A second signal indicates a desired position of the control member. A device, responsive to the first and second signals, serves to adjust the actual position of the control member to the desired position thereof.

Abstract: A first plunger pump serves to inject fuel into the combustion chamber of an internal combustion engine during first periodical compression strokes as the crankshaft of the engine rotates. A second plunger pump serves to inject fuel into the combustion chamber during second periodical compression strokes as the crankshaft rotates. The maximum fuel injection quantity during each second compression stroke of the second plunger pump is smaller than that during each first compression stroke of the first plunger pump. A sensor detects load on the engine. A mechanism serves to advance the timing of the first compression strokes relative to that of the second compression strokes with respect to the rotational angle of the crankshaft as the detected engine load increases. The characteristic curve of the rate of the sum of the fuel injections effected by the first and second plunger pumps with respect to the rotational angle of the crankshaft can vary in accordance with the engine load.

Abstract: Planetary gear mechanisms are useful in distributor fuel injection pumps to couple a distributor rotor with a drive shaft in order to rotate the distributor rotor at a preselected output angular speed which is proportional to and less than a preselected input angular speed of the drive shaft.Previously disclosed planetary gear coupling arrangements are typically rather bulky and merely provide an angular speed reduction function. In contrast, the subject thrust and planetary gear coupling provides a relatively more compact arrangement for angular speed reduction and also includes a stationary dual-thrust plate which controls axial end play of both the drive shaft and the distributor rotor. The coupling further includes a relatively inexpensive and easy to assemble planet gear and carrier assembly which during operation rotatively drives the distributor rotor at the same output angular speed and which can also bear against the dual-thrust plate to act as a running thrust member.

Abstract: An improved timing control mechanism is provided for an engine-driven fuel injection pump of the type having plungers actuated by an adjustable cam. The cam is adjusted by the linear displacement of a timing piston operating in a cylinder. A pressurized hydraulic fluid admitted to a pressure chamber at one end of the cylinder provides a force against one end of the timing piston which is opposed by a biasing element, such as a spring. A rotary servo valve extends into an axial bore in one end of the timing piston for controlling the flow of hydraulic fluid through a control orifice formed in the wall of the piston bore and connecting with the cylinder's pressure chamber. The servo valve is axially fixed and includes an inclined, typically helical, control edge. Upon rotation of the valve, as by an electric rotary stepper motor, the control edge effectively moves "axially" relative to the control orifice to vary flow therethrough and thus cause the piston to track that "axial" positioning of the control edge.

Abstract: A liquid fuel pumping apparatus of the rotary distributor type has an electromagnetically operable spill control valve including a valve member which is closed to prevent spillage of fuel from the high pressure pump of the apparatus. A transducer including a core member and a winding is provided to provide signals from which it is possible to determine the instants of spill valve closure and opening. The signals are used in a control system to control the operation of the apparatus.

Abstract: A method for injecting fuel directly into a given combustion chamber of an internal combustion engine with externally supplied ignition in which the supply of air to the combustion chambers may be either throttled or unthrottled. To assure unobjectionable operation both at partial load and under full load, the fuel is introduced during partial-load operation with a large air excess, forming a layered charge, in the vicinity of the ignition location at a time immediately prior to the instant of ignition, while at full-load operation, in order to attain maximum power and soot-free combustion by means of a homogeneous fuel-air mixture, the supply of fuel takes place during the intake stroke of the engine piston defining the combustion chamber. In order to perform this method, a distributor-type fuel injection pump is provided, in which either one distributor opening or another distributor opening of two distributor openings comes into effective operation.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a throttle member having a groove which can register with a port to control the fuel flow to an injection pump forming part of the apparatus. The throttle member is angularly movable by a governor and is also axially movable. The groove has an inclined edge so that the variation in the axial setting will also control the fuel flow. A pivotal lever has one end engaging the throttle member and its other end mounts a cam follower which engages with a cam surface formed on a cam ring which is part of the injection pump and which is angularly movable in accordance with the speed of the engine. As the speed varies so also does the axial setting of the throttle member.