Abstract: A fuel injection pump comprises a rotor located in a housing, a free piston movably mounted in an axial bore of the rotor, two pump chambers which is formed by dividing said bore by the free piston, and two solenoid valves for supplying fuel to the two pump chambers, one of the chambers receiving therein the fuel to be injected and the other for effecting control of the injection timing. This injection pump is characterized in that two preparatory chambers are provided downstream of the solenoid valves to keep fuel measured by the solenoid valves during the compression operation of said pump chambers and transfer the fuel to said pump chamber after completion of the compression whereby precise measurement of the fuel can be effected.

Abstract: A fuel injection pump of the rotary distributor type includes a rotary distributor member having a bore in which is slidable a plunger which can be actuated by a cam lobe. A stop ring is provided to limit the outward movement of the plunger by fuel which is supplied to the bore through an inlet passage in the distributor member when the latter is in register with an inlet port. The stop ring has a surface which will permit further outward movement of the plunger following cessation of fuel flow through the inlet port and passage and such additional movement to allow an excess of fuel to be delivered is allowed by fuel flow through an additional inlet passage. This passage is controlled by valve means which is preferably only opened when the engine is at rest.

Abstract: A fuel injection pump comprises a rotor disposed in a housing and having a pressure chamber therein, a free piston disposed slidably in the pressure chamber dividing the chamber two pump chambers, two solenoid valves for controlling fuel supply, and two preparatory chambers for metering fuel to be fed to the pump chambers. The preparatory chambers and the solenoid valves are arranged in the same plane crossing the axis of the rotor to align with each other. Fuel from a feed pump transfers to the preparatory chamber through the solenoid valve and is metered there. The metered fuel is fed to the pump chamber, pressurized there and delivered to the engine.

Abstract: A fuel injection pump includes a rotary distributor having a bore housing a pair of pumping plungers which are actuated by a cam. The distributor member also carries a valve member which is actuated by a cam. The valve member has a groove which can spill fuel to a drain when the valve member is moved to an operative position. In addition the valve member restricts the backflow of fuel from an outlet when fuel is spilled from the bore.

Abstract: A distributor type fuel-injection pump according to the present invention is provided with a rotor which is rotated by an engine. The rotor has a pair of plungers slidable in the radial direction of the rotor, and a fuel pumping chamber is defined between the plungers. The rotor is surrounded by a cam ring which reciprocates the plungers as the rotor rotates, thereby sucking fuel into the fuel pumping chamber and pressurizing the fuel therein. The fuel pressurized in the fuel pumping chamber is distributed to individual cylinders of the engine. A plurality of spill holes are formed in the rotor, communicating with the fuel pumping chamber and opening to the outer peripheral surface of the rotor. A control sleeve to open and close the spill holes is axially slidably fitted on the rotor. First and second spill grooves capable of communicating with the spill holes are formed on the inner peripheral surface of the control sleeve.

Abstract: A distributor diesel fuel injection pump of the spill-inject-spill type has a two-piece valve moveable relative to a valve seat to the spill-inject-spill cycles with this valve being actuated by the armature of a push type solenoid. At least the tip portion of the valve is made of steel, the remainder of the valve being formed of a compliant material so as to substantially reduce valve bounce and to permit sufficient bending of the valve to allow the armature to contact the pole surface of the solenoid.

Abstract: A fuel injection pumping apparatus of the rotary distributor type has cam lobes of a special form in which following the crest of the cam lobe there is a first portion during which limited outward movement of the pumping plunger can take place to relieve pressure in the pipelines connecting the pump with the injection nozzles and this is followed by a second portion which causes slight inward movement is to close any cavities in the fuel contained within the passage of the apparatus.

Abstract: A fuel pump for internal combustion engine has a working chamber which is divided into two chamber sections by a shuttle disposed therein, and a pumping chamber independent from the working chamber. After a delivery of a fuel into one of the chamber sections and the pumping chamber, the one chamber section is brought into communication with an injection nozzle and the pumping chamber is made to communicate with the other chamber section. Then, the volume of the pumping chamber is decreased and the fuel is pumped into the other chamber section from the pumping chamber, so that the fuel in the one chamber section is pumped into the injector nozzle through the shuttle by means of the fuel contained in the other chamber section.

Abstract: Fuel injection pump of the type arranged to inject fuel into engine cylinders with the fuel flow being controlled by an electromagnetic valve, comprises a rotor arranged to rotate in timed relation to engine rotation, and a shuttle movably received in an axial bore made in the rotor. Opposite sides of the shuttle define first and second chambers within the axial bore, where the first chamber is used as a compression chamber to pressurize fuel introduced therein via the electromagnetic valve to inject the same into engine cylinders, and the second chamber is communicable with a low pressure fuel reservoir. Fuel is fed into the first and second chambers during an intake stroke or mode, and then the second chamber fuel is pressurized by means of an inner cam mechanism so that the shuttle moves toward the first chamber to pressurize the fuel therein, thereby injecting the fuel during a compression stroke.

Abstract: A fuel injection pump for an internal combustion engine including a rotor located in a housing, a free piston movably mounted in an axial bore in the rotor, two pressure chambers defined by an inner wall surface of the axial bore in the rotor the free piston, and two solenoid valves for supplying fuel to the pressure chambers and a sensor for sensing a displacement of the free piston in an axial direction.

Abstract: An adjustable hydraulically operated stop for pulsed loading is proposed, which is particularly applicable for the metering piston of a fuel injection system. The stroke of this metering piston can be varied by adjusting a stop body by means of a metering converter. The supply chamber communicating with a fuel source or with the pump work chamber of one of the pump/nozzles of the fuel injection system, whose size is dependent on the stroke of the metering piston, determines the injected fuel quantity. The adjustable hydraulically operated stop encompasses a mechanical stop body, which is movably supported with respect to its adjusting member embodied by a sheath and communicates therewith via fluid, which also surrounds the adjusting member.

Abstract: A fuel injection pumping apparatus of the rotary distributor type has pumping plungers located in a bore in the distributor member. A cup shaped member surrounds the distributor member and has slots in which are located cam followers. The cup shaped member is connected to a drive shaft as also is the distributor member. Slidable within the cup shaped member is an annular member which has a tapered internal surface which can register with complementary surfaces on the followers or on the plungers to limit the outward movement of the plungers.

Abstract: A fuel injection pump is proposed which has a distributor in which both the injection quantity and the onset of injection are variable. The distributor is axially displaced via electric servomotors and is rotated relative to the drive shaft.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine is of the rotary distribution type in which the outward movement of pumping plungers is determined by stops, the axial position of the distribution member being adjustable to determine in conjunction with the stops the amount of fuel delivered by the apparatus. The plungers are actuated by cam lobes on a cam ring and two types of cam lobe are provided. One type of lobe provides the normal pumping action while the other type of lobe is shaped to provide an initial delivery of fuel by the apparatus in advance of the main quantity of fuel. The initial quantity can be varied by moving the cam ring angularly.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine is of the rotary distributor type having a distributor member including a transverse bore and a pair of pumping plungers slidable in the bore. At the outer ends of the plungers cam followers are mounted and first and second cam rings are provided having cam lobes to actuate the plungers respectively. The cam follower associated with one plunger has a shoe carrying a follower for engagement with the lobes of the first cam ring only and the cam follower associated with the other plunger has a shoe and a divided roller for engagement with the second cam ring which is also divided. The number of cam lobes on each cam ring is equal to the number of cylinders of the associated engine and the cam rings are positioned angularly relative to each other so that inward movement is imparted to each plunger at the same time during rotation of the distributor member.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprises a reciprocable plunger, a roller forming part of a tappet assembly and a cam for actuating the roller and plunger. The cam is formed on the outer peripheral surface of a cup-shaped member, which is supported about a spigot. A drive shaft is integral with the cup-shaped part.

Abstract: A fuel injection pumping apparatus for supplying fuel to an engine is of the rotary distributor type and has an annular cam ring having cam lobes for imparting inward movement to a pumping plunger. The trailing flanks of the cam lobes define metering portions which are less steep than those of known pumps so as to extend the time during which the outward movement of the plunger is controlled by the cam lobes. In addition the apparatus includes a sleeve slidable in the distributor member of the apparatus and this incorporates a shaped recess which communicates with a source of fuel. The bore containing the plunger communicates with an inlet port which can be uncovered to the recess while the plunger is under the contact of the metering portion of the cam lobe. The sides of the recess are not parallel so that the amount of fuel which flows to the bore depends on the setting of the sleeve.

Abstract: A fuel injection apparatus for controlling fuel injectors for internal combustion engines which injectors remain normally shut as a result of a high fuel pressure applied on either side of injector fuel nozzles. The apparatus of the present invention includes a first slide valve member which, by sliding from one extreme position to another, is able to lower the pressure below a fuel nozzle associated with a fuel injector to start a fuel injection cycle in that injector. The apparatus also includes a second slide valve member which, by sliding from one extreme position to another, is able to increase the pressure below the fuel nozzle to end the fuel injection cycle and control the duration of the fuel injection cycle as well as the flow rate of the injected fuel. The first and second slide valve members return to their initial positions after two consecutive fuel injection cycles.

Abstract: A fuel injection pumping apparatus of the axially slidable rotary distributor type includes a cup shaped member mounted on a drive shaft and a distributor member which as a bore containing pumping plungers. The outward movement of the plungers is controlled by a tapered surface on the interior of the cup shaped member which co-acts with complementary surfaces on cam followers, disposed between the plungers and a surrounding cam ring. The slots in the cup shaped member which accommodate the followers are of helical or like form and the distributor member is driven angularly by tongues which are secured to the distributor member and which locate in the slots. As the distributor member moves axially it is also moved angularly by the action of the helical slots so that the timing of delivery of fuel remains constant.

Abstract: A cylinder deactivating device for diesel engines includes a rotary valve assembly operatively connected selectively to half of the cylinders so that half of the cylinders can be cutout when desired. The preferred embodiment includes a pair of separate rotary elements in the valve assembly which can be operated individually so that in an eight cylinder engine for example, it may be selectively adjusted to run on four, six or eight cylinders.

Abstract: Two solenoid valves having needle valves to control the supply of fuel to a rotary distributor are mounted in such a manner that the needle valves move in a direction tangent to the rotating circle of a rotary distributor.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine includes a rotary distributor member which is also axially movable to determine the amount of fuel supplied by the apparatus. Fluid under pressure is supplied to the chamber to move the distributor member axially against the action of a spring and valve means is provided to control the pressure. The valve means includes a first member in the form of a spool and a second member in the form of a sleeve. The sleeve is coupled by linkage to the distributor member and the position of the spool is determined by a speed responsive governor. A land on the spool co-operates with a port to control the flow of fluid to the chamber. A groove on the spool and a port register to allow fuel flow to a pumping chamber but move out of register to halt fuel flow if the spool should move with increasing speed without there being a corresponding movement of the distributor member and sleeve to reduce the fuel delivered by the apparatus.

Abstract: A distribution type fuel injection pump for distributing and pumping a fuel into a plurality of cylinders of an internal combustion engine. The fuel injection pump is constructed of a hydraulic head formed with first and second fuel feed ports, a rotor fitted in the hydraulic head, and plungers fitted in the end portion of the rotor for effecting the pumping action in accordance with the rotations of the rotor. Separately of this rotor, there is formed in the hydraulic head, for example, a pressure space in which a shuttle is slidably fitted to partition the pressure chamber into first and second pressure chambers. The fuel, introduced from the first fuel feed port and compressed by the plungers, is guided into the first pressure chamber of said pressure space in accordance with the rotation of the rotor, and the fuel, is introduced into the second pressure chamber, is consecutively distributed and pumped into the respective engine chambers by the movements of the shuttle.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprises an injection pump to which fuel is supplied by a low pressure pump. A part of the injection pump defines a surface against which a control pressure can act to vary the amount of fuel supplied by the injection pump, the part being spring loaded by a spring in a direction to oppose the force exerted by the control pressure and to increase the amount of fuel supplied. The control pressure is derived from the low pressure pump by means of a control system and if the output pressure of the low pressure pump should fall due to for example fuel starvation, the part will move in the direction to increase the amount of fuel supplied by the apparatus, this being permitted even though the output pressure is reduced.

Abstract: A liquid fuel injection pumping apparatus of the rotary distributor type has stop means defined by complementary inclined surfaces on a rotary portion, coupled to a drive shaft and on the cam followers associated with the pumping plungers. The cam followers and the distributor member are axially movable to vary fuel quantity. In order to vary the initial rate of fuel delivery one or a reduced number of plungers only is arranged to deliver the initial flow of fuel. This is achieved by axial adjustment of one or more cam followers relative to the distributor member so that the associated plunger or plungers can move outwardly further during the filling stroke of the apparatus and will therefore be moved inwardly before the remaining plungers. Alternatively an axially movable part may be provided on said rotary portion.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine, includes an injection pump having a plunger movable inwardly by cam means to effect delivery of fuel and a valve operable to control the supply of fuel to the bore containing the plunger. The valve is electrically controlled and the apparatus includes an electronic control system which is supplied with signals from transducers which are responsive to the positions of the cam means and a rotary part of the apparatus relative to the housing of the apparatus. The control system has information stored therein regarding the profile of the cam means, and controls the operation of the valve so that the correct amount of fuel is supplied to the bore.

Abstract: An injection pump includes a rotor having a central axial bore and a radial bore and rotated in relationship with an engine. A free piston reciprocably inserted in the central axial bore defines a first and second chamber. The first chamber includes a plurality of first radial passages and a radial spill port and communicate with the radial bore and the second pressure chamber includes a plurality of second radial passages and a discharge passage. A pair of plungers which is disposed in the radial bore is so constructed as to produce, in accordance with the revolution of the rotor, a compression period in which the liquid fuel is pressurized in the first pressure chamber and pressurized fuel in the second pressure chamber is supplied to the engine through the discharge passage, and a suction period in which the liquid fuel is supplied to the pressure chambers.

Abstract: A fuel injection pumping apparatus comprises a rotary distributor member which is also axially slidable within a fixed sleeve. The distributor member is provided with a recess which communicates with a bore containing the pumping plungers. The recess is provided with mutually inclined leading and trailing edges which cover and uncover inlet ports and outlet ports as the member rotates. While an inlet port is in communication with the recess fuel is allowed to flow to the bore and when the inlet ports are covered and outlet port is uncovered to the recess fuel flows from the bore to the uncovered outlet port. The fuel quantity is varied by altering the axial position of the distributor member.

Abstract: A fuel injection system for an internal combustion engine employing a rotary valve for delivering fuel to fuel injectors in which fuel injection timing is precisely controlled to an optimum range by automatically controlling the rotary valve in response to the number of revolutions of the engine. The system includes a high pressure accumulator connected to a fuel pump and a low pressure accumulator connected to a tank through a variable restrictor valve. The rotary valve functions to selectively connect each injector to the high and low pressure accumulators as it rotates whereby metered amount of fuel can be fed into a plunger chamber of each injector when a piston chamber of the injector is connected to the low pressure accumulator and the fuel can be injected through nozzle orifices when the piston chamber is connected to the high pressure accumulator.

Abstract: An electronically controlled device for premetered pressure-time injection using high injection pressure and low feed pressure, which include one source (5-6) of medium pressure (MP) which is intermediate the high and low pressures, a two-stage rotary distributor which cyclically distributes the high and low pressure into single piping systems for each cylinder, a plurality of injection nozzles wherein, in each injector nozzle (30), a metering piston is provided (8) whose delivery chamber (21) is connected to the single piping system, and an injector control piston (11) having a control chamber (31) which is connected, via a three-channel electrovalve (9), through a medium pressure channel for the purposes of initiating injection, and through a second channel to the injection chamber (22) for purposes of initiating metering.

Abstract: A fuel injection pumping apparatus of the rotary distributor type has a distributor member which is also axially movable to determine the allowed outward movement of the pumping plungers and hence the amount of fuel supplied to the associated engine. The extent of outward movement is determined by inclined stop surfaces which co-operate with complementary surfaces on shoes associated with the plungers. In order to minimize axial movement of the distributor member when the shoes engage the stop surfaces a chamber to which liquid is supplied to vary the axial setting of the distributor member, is locked off from fluid supply and drain passages, by a servo valve 41 when the correct position of the distributor member is obtained. A hydraulic lock is thus created in the chamber.

Abstract: A control apparatus for an electrically controlled injection pump of a Diesel engine comprises a main controller for controlling valve opening durations of an injection quantity control solenoid valve and an injection timing control solenoid valve provided for the injection pump so that a desired quantity of fuel is supplied to the engine in an optimal injection timing and a sub-controller for controlling the injection pump in place of the main controller upon occurrence of failure of the latter. The sub-controller is constituted by an injection timing signal generator for preparing an injection timing control signal of a fixed duration applied to the timing control solenoid valve and an injection quantity signal generator for preparing an injection quantity control signal applied to the quantity control solenoid valve, which signal has a pulse width variable in dependence on a parameter representative of a desired operation state of the engine.

Abstract: A fuel injection system for a diesel engine having injection and metering modes of operation for delivering fuel to an engine comprising a plurality of fuel injectors wherein each of said fuel injectors comprise a first port, a second port and a metering chamber for storing a premetered quantity of fuel, during the metering mode of operation, prior to the injection of said premetered quantity of fuel into the engine during the injection mode of operation.

Abstract: A liquid fuel pumping apparatus for supplying fuel to a multi-cylinder engine has a plurality of outlets for connection to the injection nozzles of the engine. The apparatus includes a spill passage and a spill control valve which is electrically controlled. The valve is closed to cause fuel from a high pressure pump to be delivered through the outlets, fuel being supplied by the high pressure pump to the outlets in turn. A pressure transducer provides signals indicative of the pressures attained in the various outlets during delivery of fuel therethrough. One of the pressure signals serves as a standard and the other signals are compared with this signal to produce correction signals which vary the time the spill valve is closed when fuel is supplied to those outlets to which the other signals pertain.

Abstract: A fuel injection pump of the rotary distributor type has angularly adjustable stop rings which limit the outward movement of the pumping plungers so as to control the maximum fuel output of the pump. The stop rings have an outwardly extending curved stop surface so that the maximum fuel output can be altered by altering the angular setting of the rings. The latter portion of the stop surface is arranged to curve outwardly at a greater rate so that as the engine speed increases the plungers no longer follow paths determined by said surface so that the maximum fuel delivery of the pump decreases.

Abstract: A fuel injection system for a diesel engine having an injection and metering modes of operation for delivering fuel to an engine comprising a plurality of fuel injectors wherein each of said fuel injectors comprise a first port, a second port and a metering chamber for storing a premetered quantity of fuel, during the metering mode of operation, prior to the injection of said premetered quantity of fuel into the engine during the injection mode of operation.

Abstract: A fuel injection pump for self-igniting internal combustion engines is proposed in which a metering piston operates synchronously with the engine and a distributor operates synchronously with a pump piston. During the intake stroke of the pump piston the distributor delivers a metered injection quantity to a work chamber associated with the pump piston, and during the compression stroke of the pump piston the metered injection quantity is distributed through injection lines to the engine injection nozzles. The metering piston is disposed upstream of the distributor so that high pressure conditions do not deleteriously effect the fuel metering. The stroke of the metering piston is adjusted electrically and controlled by a microprocessor unit to which engine operating characteristics are supplied.

Abstract: The invention relates to a fuel injection system having a pump/nozzle for which the fuel is metered by one apparatus and the injection onset is determined by a second apparatus. In accordance with the invention, these apparatuses each operate with a distributor, both distributors being combined into a single structural unit. Because of this combination, structural possibilities are created which, both functionally and in terms of manufacturing cost, represent substantial improvements in the field of injection systems.

Abstract: A liquid fuel injection pumping apparatus of the rotary distributor type has two forms of cam lobe on its cam ring. The first form of cam lobe is a pumping lobe which can effect inward movement of a plunger to achieve pumping of fuel and after the crest of the lobe has been passed allows outward movement of the plunger to lower the fuel pressure in the various passages in the apparatus. The other form of lobe is a holding lobe which while one plunger is being moved inwardly holds another plunger against movement. When the crest of the holding lobe is reached the associated plunger is allowed to move outwardly and this movement is arranged to take place shortly before the end of the inward movement of the plunger associated with a pumping lobe. The effect is to reduce the period towards the end of fuel delivery at which fuel is supplied at a reducing rate.

Abstract: A fuel injection pump, in particular a radial-piston pump having rotating cams, is proposed in which a reservoir is incorporated in the supply line leading from the supply pump to the pump work chamber, and in which a reservoir pressure is used at the same time for restoring the outset position of the pump pistons during the intake stroke.

Abstract: A fuel injection pumping apparatus comprises an axially movable distributor member the axial setting of which determines the amount of fuel supplied by the apparatus at each pumping stroke. The distributor member is biassed by a spring in one axial direction and is movable in the opposite direction by varying the fluid pressure in a chamber through a port. The port is formed in a sleeve which is coupled to the distributor member by means of a lever and a rod member is axially movable within the sleeve. The axial position of the rod member can be varied to alter the effective size of the port and the distributor member and sleeve move because of the change in pressure in the space. A new equilibrium position is thus established with the distributor member following the movement of the rod member.

Abstract: A liquid fuel injection pumping apparatus for supplying fuel to an engine includes an injection pump to which fuel is supplied through a feed passage in a distributor member from a low pressure pump. Fuel is delivered by the injection pump through a separate delivery passage which can register with an outlet. In order to enable air to be purged from the passages and injection pump, the delivery passage during the time fuel is being supplied to the injection pump is arranged to register with a further port which communicates in the example with a fuel supply tank. A restrictor is provided to control fuel flow through the further port.

Abstract: A fuel injection pump for supplying fuel to an internal combustion engine includes a plunger reciprocable within a bore by cams on a cam ring. Fuel is supplied to the bore by a throttle. A first valve is provided which connects a point intermediate the throttle and the bore with a drain. A second valve is provided to ensure that the pressure applied to the outer end of the plunger is above said drain pressure. When the first valve is opened the pressure acting at the outer end of the plunger will move it inwardly to ensure that it cannot be actuated by the cam.

Abstract: A fuel injection pump is provided with an improved spill control mechanism to accurately supply a desired fuel charge to an internal combustion engine. The fuel pump includes a rotor having a charge pump for pressurizing measured charges of fuel for delivery to the engine and a cam ring adapted to rotatably receive the rotor and to actuate the charge pump upon rotation of the rotor. The cam ring is angularly adjustable to control the timing of the pressurized fuel delivery to the engine. A spill collar mounted adjacent to the cam ring and adapted to rotatably receive the rotor includes a spill port for diverting fuel flow from the charge pump upon registration of a spill passage in the rotor with the spill port in the collar. A pivotal crank mounted on the cam ring and engageable with the spill collar is provided for adjusting the angular position of the spill collar relative to the cam ring to control the amount of fuel diverted from the charge pump.

Abstract: A fuel delivery system for a diesel engine for controlling the propagation of unwanted pressure waves including a fuel pump for sequentially delivering fuel from a fuel tank to a plurality of fuel injectors through a plurality of injection lines. The system further includes a drain line, one associated with each fuel injector, that is connected a pressure source, wherein the impedance of each drain line is equal to the impedance of its corresponding injection line. Each drain line further includes a flow restriction having an impedance equal to the impedance of its corresponding drain line and a valve, connected across the flow restriction for diverting flow around the flow restriction during intervals of time when fuel is flowing from the pressure source towards a particular one of the fuel injectors.

Abstract: A fuel injection system is proposed which functions with pump/nozzles, in which a control slide which determines the injection onset and disposed in each pump/nozzle is triggered by a distributor unit and the variation of the injection onset is effected by rotation of an annular slide which surrounds the distributor.

Abstract: A fuel injection pumping apparatus includes an axially movable distributor member which carries pumping plungers movable inwardly to effect delivery of fuel by means of cam lobes formed on a cam ring. The axial position of the distributor member determines the amount of fuel supplied by the apparatus each time the plungers are moved inwardly. The distributor member is moved axially by varying the volume of liquid in a chamber, the distributor member moving as the volume of liquid increases against the action of a spring. The volume of liquid is controlled by means of a sleeve axially movable by means of a governor mechanism which includes weights. The sleeve controls the size of a port which communicates with the chamber and liquid is supplied to the chamber through a passage from a supply pump.

Abstract: A distributor injection pump for diesel engines is disclosed. The pump includes a hydraulically balanced distributor head housing the moving parts of a cam actuated opposed piston injection pump rotatably driven in synchronization of the engine. A single solenoid valve disposed along the spill path of the injection pump controls the timing and duration of the fuel injection pulses generated at each of the pump's distributor output ports.

Abstract: A fuel injection pumping apparatus comprises a rotary distributor member mounting a pumping plunger in a transverse bore. A cam ring is provided to impart inward movement to the plunger as the distributor member rotates and the cam ring is movable angularly in accordance with speed by a fluid pressure operable device. Stop rings are mounted on the opposite sides of the cam ring and these are angularly adjustable to alter the allowed outward movement of the plunger. The stop rings are connected by a bridging member mounting a peg. The peg mounts a lever having a cam surface engageable with a stop member and the lever is movable by means of the cam ring so that the setting of the stop rings varies with speed.

Abstract: A liquid fuel injection pump having a rotary distributor for unrestricted delivery of metered charges of fuel in succession to the fuel injection nozzles of an associated engine and having a snubber orifice with a snubber port provided either in the distributor stator for each distributor outlet port or in the rotor for the distributor delivery port for transmitting and damping a reverse pressure wave from each fuel injection nozzle back through the distributor.