Abstract: A fuel injection pumping apparatus includes a piston located within a cylinder. The piston is connected to an annular cam ring of a rotary distributor type fuel pump to adjust the timing of delivery of fuel. A passage conveys fluid under pressure to act on the piston to move the piston against the actions of a spring. The passage includes a check valve to prevent movement of the piston and cam ring when a pump plunger is moved inwardly by a cam lobe on the cam ring and a further check valve which prevents movement of the piston and cam ring when the plunger is allowed to move outwardly by the cam lobe.

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 fuel injection pumping apparatus comprises an injection pump including an angularly movable cam ring connected to a piston. Resilient means bias the piston against the action of a fluid pressure which varies in accordance with speed. A cam plate engages an abutment for the resilient means and is adjustable by means of a pivotal lever the setting of which is varied in accordance with the amount of fuel supplied by the apparatus thereby to vary the setting of the cam plate. The fulcrum for the lever is adjustable in accordance with the speed by means of a further piston responsive to said fluid pressure.

Abstract: The invention relates to a fuel injection pump for internal combustion engines having an injection onset adjuster with which the injection onset is adjustable toward "early", for instance in accordance with temperature. In accordance with the invention this adjustment toward "early" is made possible especially in pumps having a load-dependent injection onset adjustment, which preferably exhibit a shift toward "late" up to full load.

Abstract: A injection advance device is disclosed for diesel engine fuel injection pump including a pump housing, a feed pump for supplying fuel pressure proportional to engine speed into the pump chamber, and a control member movable to determine a fuel-injection timing corresponding to its position. The injection advance device comprises a casing, a cylinder reciprocally located in the casing, a piston reciprocally located in the cylinder and drivingly connected to the control member, and means for allowing movement of the piston in a direction causing the control member to advance the fuel-injection timing. Means is provided for moving the cylinder in a direction holding the piston in the position before the engine is warmed up.

Abstract: In a distribution type fuel injection system, the fuel injection advance angle, or the relative angular position at which fuel injection begins, is controlled by a first spring loaded piston (44). The spring force is opposed by pressurized fuel from a pump (14), the pressure increasing with engine speed. A second spring loaded piston (49) moves the first piston (44) to an advanced position for starting the engine and is retracted when the fuel pressure reaches a certain value to subsequently retard the advance angle in an idling speed range. The fuel pressure moves the first piston (44) to progressively advance the angle in a higher speed range. An electromagnetic valve (62) is controlled to trap fuel and apply a hydraulic lock to the second piston (49) during starting of the engine to prevent retarding of the advance angle until the engine speed or coolant temperature reaches a predetermined value.

Abstract: A fuel injection pump for internal combustion engines having an injection time adjuster functioning hydraulically is proposed. The adjustment characteristic of the injection time is determined by permitting a discharge of a partial quantity of fuel, this quantity being controllable by means of a relief channel during the relative movement between the adjusting piston and the work cylinder receiving this adjusting piston.

Abstract: In a fuel injection pump for use in an internal combustion engine, an injection timing control system actuatable in response to a pressure varying in dependence on engine r.p.m., which is designed to convert acceleration of a fuel injection quantity setting movable operating member into an electrical signal to obtain a control signal based upon said electrical signal for driving a magnet valve for controlling said pressure, thereby varying the injection timing by a proper amount in immediate response to an engine accelerating operation.

Abstract: A fuel pumping apparatus for supplying fuel to a compression ignition engine includes an injection pump having a cam ring which can be moved by a piston to vary the timing of delivery of fuel. The piston is biased by compression springs the extension of which is determined by a rod having a transverse pin engageable with cam surfaces defined on an annular member. An operating shaft can be moved angularly to move the pin angularly from a first to a second position so that it contacts a different portion of the cam surface, when it is required to start the engine. During this movement a spring is stressed and this when the engine starts, moves the pin to a third position for cold idling of the engine. When the engine is warm the shaft is moved to return the pin to the first position.

Abstract: A fuel injection pump for internal combustion engines is proposed wherein the pressure of a supply pump is controlled in accordance with rpm. A valve which controls the pressure additionally in accordance with load is actuated via a member, actuated in accordance with load, of the rpm governor of the pump. The preferred embodiment relates to distributor-type injection pumps having an electric final control element, the rotary shaft of which acts as the movable member of a slide valve.

Abstract: In a distributor type fuel injection pump including a load-responsive pressure adjusting device which is responsive to engine loads for allowing drainage of part of the fuel in the suction chamber of the pump into a zone under lower pressure in the pump when the engine is operated within a predetermined load range, a pressure setting valve is provided in a drainage passage forming part of the pressure adjusting device, which is adapted to open at a predetermined pressure. The pressure setting valve enables establishment of necessary fuel pressure for normal actuation of a fuel injection timing control device provided in the pump within a low engine speed (rpm) range even during operation of the pressure adjusting device.

Abstract: The invention relates to a control apparatus for the variation of the onset of supply by a fuel injection pump having an adjustment piston engaging the piston cam drive, the adjustment piston under rpm-dependent pressure being adjustable counter to a restoring force by a fluid located in a work chamber of the adjustment piston, and an assembly for prolonging the supply time and at least during pump supply on the basis of the restoring and reactionary force including displacing the adjustment piston counter to the fluid pressure.

Abstract: A fuel injection pump having a hydraulic adjuster for the instant of injection is proposed, in which in addition to the rpm-proportional adjustment of the onset of injection, a supplementary variation of the onset of injection occurs in accordance with pressure related to altitude.

Abstract: To provide for gradual admission of servo fluid to then operate a fuel injection pump to pus injected fuel out through the nozzle, a control valve element is used which has a displacement or deflection-vs.-servo fluid admission characteristic which provides for hydraulic choking of pressurized servo fluid being admitted to a servo cylinder chamber upon initiation of a fuel injection event, and thereby provide for gradual build-up of injection pressure of the fuel.

Abstract: An apparatus for controlling fuel injection timing in a diesel engine includes a piston activated by supplied pressure proportional to engine speed to advance the injection timing of the fuel injection pump in accordance with engine operating speed. In accordance with the invention, the injection timing control apparatus is provided with an adjusting mechanism which responds to a supplied indication of engine temperature for advancing the injection timing when the engine is cold and retarding the injection timing when the engine is at normal operating temperature. In a preferred embodiment, the indication of engine temperature is fluid pressure which is controlled by a valve and acts on an adjusting member to increase the tension on the piston return spring when the engine is at operating temperature.

Abstract: An injection timing device is proposed for internal combustion engines, by means of which the mutual rotary position of the output shaft with respect to the input shaft can be varied in dependence on the speed and on at least one further operating parameter. The timing device comprises flyweights, operating in dependence on the speed against the force of resetting springs, and hydraulically operated control elements which engage the flyweights, these control elements, which are effective radially toward the outside, being accommodated within the timing element. By changing the position of the control elements, the radial position of the flyweights, which otherwise is determined only by centrifugal force, can be additionally varied in dependence on at least one further operating parameter of the engine, preferably the load, in order to correct the instant of injection.

Abstract: An engine driven fuel injection pump has a cam and pump plungers movable relative to the cam to translate the contour of the cam into a sequence of pumping strokes. A timing control mechanism, used to vary the rotative position of the cam as a function of engine operation, includes a control piston mounted in a cylinder and connected to the cam to control the position thereof whereby to advance and retard the relative timing of the pumping strokes. Movement of the control piston is controlled by hydraulic fluid supplied from a source of fluid under a pressure correlated with the operating speed of the associated engine. The control piston is slidable between a power piston biased by a resilient means in one direction and actuated in the opposite direction by hydraulic fluid from the source of fluid under pressure.

Abstract: An engine driven fuel injection pump of the type having a cam ring and an advance timing control mechanism to adjust the angular position of the cam ring has an eccentric cam pin effecting an operative interconnection between the cam ring and the advance piston of the timing control mechanism. An externally accessible adjusting means is used to rotate the eccentric cam pin so as to shift the position of the cam ring relative to the advance piston, as necessary, to effect correct static timing of the pump to the engine.

Abstract: A governor sleeve is axially displaceable on a stationary governor shaft and has an inner space which is adjoined by the governor shaft and communicated with the inner chamber of a pump housing charged with fuel. The inner space varies in volume drawing thereinto and discharging therefrom fuel in response to axial displacement of the governor sleeve. There is provided valve and channel means which establishes restricted communication between the inner space and the inner chamber upon displacement of the governor sleeve in the direction to produce contraction of the inner space and substantially unrestricted communication between same upon displacement of the governor sleeve in the opposite direction to produce expansion of the inner chamber in order to prevent an acceleration jerk and smoky exhaust.

Abstract: A fuel injection pump in which the beginning of the fuel injection is set to "early" during the warming-up of the engine by means of an adjustable piston. The adjustment occurs by shifting the adjustable piston by a control member acting through an adjusting member.

Abstract: In a distribution type fuel injection system, the injection advance angle, or the relative angular position at which fuel injection begins, is controlled by a first spring loaded piston (44). The spring force is opposed by pressurized fuel from a pump (14), the pressure increasing with engine speed. A second spring loaded piston (49) moves the first piston (44) to an advanced position for starting the engine and is retracted when the fuel pressure reaches a certain value to retard the advance angle in an idling speed range. The fuel pressure moves the first piston (44) to progressively advance the angle in a higher speed range. An O-ring (61) is provided to an end of the second piston (49) which abuts against an end wall (53) so that the fluid pressure receiving area of the second piston (49) is small when the second piston (49) abuts against the end wall (53) but is greater when the second piston (49) is moved away from the end wall (53).

Abstract: The invention relates to a fuel injection pump in which, via an appropriate transducer, the temperature of the coolant of the internal combustion engine intervenes as a control value in the fuel injection pump regulation, in that at least two of the following three final control elements are simultaneously adjusted: A for the injection onset adjustment; B for the increased starting quantity; or C for the idling rpm.

Abstract: An injection timing control system for a fuel-injection pump for an engine has a phase angle regulator for varying the rotational phase angle of a drive shaft of the fuel-injection pump in which a cylindrical extension of one of an input shaft adapted to be driven by the engine and an output shaft for driving the drive shaft of the pump surrounds an end portion of the other shaft in spaced apart relationship. A male spline is formed on the end portion over some axial length thereof while a female spline is formed on the extension over some axial length thereof, at least one of the splines being a helical spline. A slider is located in an annular space between the splines and formed with splines meshing therewith respectively. An annular cylinder is formed between the substantial parts of the rest axial length portions of the extension and end portion, and a piston is reciprocally received in the cylinder, the slider and piston being formed as a unit.

Abstract: An injection timing control system for a fuel-injection pump for an engine has a phase angle regulator for varying the rotational phase angle of a drive shaft of the fuel-injection pump. The regulator has a cylindrical extension of one of an input shaft adapted to be driven by the engine and an output shafts for driving the drive shaft of the pump coaxially surrounding an end portion of the other shaft in spaced apart relationship. A male spline and female spline are formed respectively on the end portion and the extension over some axial length thereof, at least one of the splines being a helical spline. A slider is located in an annular space between the splines and formed with splines meshing therewith respectively. An annular cylinder is formed between the substantial parts of the rest axial length portions of the cylindrical extension and end portion. A piston is reciprocally received in the cylinder, the slider and piston being formed as a unit.

Abstract: An injection timing device is proposed for internal combustion engines, by means of which the mutual rotary position of the output shaft with respect to the input shaft can be varied at least in dependence on the speed. The timing device comprises at least one pair of eccentrics which serve as the adjusting gear system and comprises an adjusting eccentric and a compensating eccentric, this pair of eccentrics being supported in a bearing member connected to one of the shafts, the adjusting eccentric of this pair also being coupled by means of a transmission member with a hydraulically operable servo piston. By a positional change of the servo piston effected by the hydraulic medium, the adjusting eccentric can be rotated to change the instant of injection.

Abstract: A fuel injection pumping apparatus includes a piston movable to displace a pumping plunger to deliver fuel through an outlet. Fuel can be supplied to the bore containing the plunger from a pressure source. The piston is moved by liquid under pressure delivered by a cam actuated piston the liquid flowing into the cylinder containing the piston by way of a non-return valve. A spill port is provided to allow surplus liquid to escape from the cylinder. Following movement of the piston by the cam movement of the piston is initiated by closure of a valve. The same valve is utilized to control the return motion of the plunger after the delivery of fuel has stopped.

Abstract: A power plant including an internal combustion engine having a rotary output, a fuel injection pump having a rotary input adapted to be driven by the rotary output in timed relation thereto, and structure interconnecting the input and output including first and second spaced, nonengaging gears, one connected to the input and the other connected to the output, a third gear disposed between and engaging both the first and second gears, a movable carrier journalling the third gear and mounting the third gear for movement whereby the rotational axis of the third gear may be shifted relative to at least one of the first and second gears, and a selectively operable motor connected to the carrier for moving the same to shift the third gear to selectively alter the phasing between the engine and the fuel pump.

Abstract: Control of valve needle lift in fuel injections for direct-injection internal combustion engines wherein an injector having at least one fuel supply pipe and one leak-off pipe is provided with a nozzle body in which is situated an axially slidably supported valve needle which is maintained by the force of at least one closing spring in its closing position and capable of being lifted off its valve seat by the pressure of the fuel. A sleeve is provided with connecting ports or openings in the injector which sleeve is capable of being moved axially by means of a hydraulic control medium. The connecting openings or ports can be covered by a piston when the end face of the sleeve is acted upon by the control medium, and when the valve needle is lifted off its valve seat, permitting the valve needle lift to be reduced.

Abstract: A fuel pumping apparatus for a compression ignition engine includes a fluid pressure operable piston for determining the timing of delivery of fuel. Fuel control means is provided which includes a lever operable to increase the idling speed of the engine when cold. The apparatus also includes a mechanism operable by said lever to achieve from the hot idling position retarding the timing of delivery for starting and advancing of the timing of delivery for cold idling. The mechanism includes a pair of members the one member being movable by said lever and the faces of the members having tang and slot connections in their presented faces and the other member and the end of the piston having further tang and slot connections. The slot of one of said tang and slot connections being of varying depth.

Abstract: A fuel injector (10) is provided for each cylinder of an internal combustion engine, the injector including an electronically operated control valve (146) disposed between supply passage 42 and a timing chamber (98) to control the admission of fuel into and out of the timing chamber. A primary pumping plunger (62) and a secondary plunger (90) are axially spaced within the central bore of the injection body, and a normally closed injection nozzle (14) is situated at one end of the injector body. A mechanical linkage (27, 28, 30) associated with the camshaft of the engine drives the primary pumping plunger (62) against the bias of a main spring (18). The timing chamber (98) is defined between the plungers (62, 90) and a metering chamber (128) is defined between the secondary plunger (90) and the nozzle (14).

Abstract: In an rpm limit shut-off regulation effected by a piston which is displaceable by the rpm-dependent pressure of a regulator fluid and which limits the injection quantity, it is proposed to influence the shut-off curve via a pressure roller which engages a contact surface of the piston. The shut-off curve can be selected to be steeper or flatter over the entire range or a partial range. However, without requiring additional means, the full-load injection quantity can also be influenced in accordance with the rpm. To this end, rapidly rotating parts with necessarily resulting high wear are not required.

Abstract: A fuel injection pump for Diesel engines in which a rotating and reciprocating piston pressurizes and distributes fuel to individual pressure lines leading to the injection valves of the engine. In order to change the timing of injection with respect to the engine cycle, there is provided a mechanism to change the relative angle between the pressurizing piston and its drive means, which runs in synchronism with the engine. The mechanism operates hydraulically and is affected by the fuel pressure in the sump of the injection pump. There is also provided a hydraulic control valve mechanism which permits varying amounts of fuel to flow back from the sump to the low pressure side of the fuel delivery pump, thereby changing the injection timing. A primary control valve adjusts the sump pressure on the basis of engine speed while a secondary control valve adjusts the sump pressure on the basis of engine temperature in order to adapt the timing of fuel injection to engine starting and engine warm-up.

Abstract: An apparatus for setting the angular relationship between rotating driving, and driven members in the injection pump drive of an internal combustion engine. The driving member and the driven member have a toothed portion of which at least one is a helical toothed portion, whereby the toothed portions are coupled to each other by a coupler member having toothed portions which mesh with the toothed portions of the driving and driven members. At least one of the toothed portions of the coupler member is configured as a helical portion and is hydraulically displaceable with respect to the other toothed portions. This hydraulic displacement is controlled by a centrifugal governor having flyweights. The flyweights displace a valve member against the force of at least one spring in an rpm-dependent manner to effect the rpm-dependent adjustment of the instant of injection. In addition to the rpm-dependent displacement, a load-dependant displaceability, can be superimposed.

Abstract: A distribution type fuel injection pump for use in a fuel injection combustion engine comprising a plunger capable of moving reciprocally along its axis and simultaneously rotating about its axis and a couple of members forming a cam mechanism having a first cam member and a second cam member. The first cam member is mounted on the plunger and the second cam member is mounted on a housing rotatably about its axis. The couple of cam members cause the plunger to reciprocally move while the plunger is rotating. The angular position of the second cam member about its axis can be controlled by a fuel injection timing control means in accordance with the engine speed. The second cam member can also turn about its axis so as to be adjusted in its angular position by a fuel injection timing adjustment when a selected operating condition of the engine, for example the engine start, is carried out.

Abstract: An injection timing control device for use in a distributor-type fuel injection pump for internal combustion engines, which comprises: first and second hydraulic actuatable elements adapted to be actuated by a fluid pressure proportional to engine r. p. m., the second element having a larger pressure applying area than the first element and disposed on an extension of the axis of the first element; a first spring interposed between the first and second elements for urging the elements in opposite directions to each other; a second spring for urging the second element in an opposite direction to the first element; means for limiting displacement of the second element toward the first element; and means coupling the first and second elements for relative movement thereof within a limited distance.

Abstract: A hydraulic advance device for selectively transmitting applied forces to a fuel injector of an internal combustion engine. The device is operative to select a normal or advanced timing of the fuel injection. An outer cylindrical body (66) is mounted in the upper end of a fuel injector adapter. An inner body (108) is slidably received in an outer body and a reaction member (103) and pressure responsive plunger (117) are slidably received in a bore formed in the inner body. The plunger and the bore cooperate to define a fluid chamber (128). A one-way valve (132) in the chamber permits fluid above a predetermined pressure applied during the advanced stage of the fuel injection cycle to enter the chamber which prevents movement of the plunger relative to the inner body member.

Abstract: This disclosure deals with a mechanism for adjusting the timing of initiation of injection by a fuel injector of an internal combustion engine. The mechanism includes a piston connected to be moved by a drive for the injector, and another piston which is connected to move the plunger of the injector. A timing fluid supply is provided for feeding a timing fluid into a timing chamber formed between the two pistons under selected operating conditions, the timing fluid forming a hydraulic link between the two pistons. The mechanism further includes pressure relief means for releasing a portion of the timing fluid after the termination of injection, the relief means comprising a pressure responsive mechanism.

Abstract: A fuel injection pump having a mechanically adjustable servo valve for controlling the timing of the pumping event is disclosed. A pivoted lever has one end which engages the spring seat of a timing control plunger servo valve which is also subjected to a speed related hydraulic signal and another end which engages a cam clamped on the throttle shaft to pivot the lever according to the rotational position of the shaft. The profile of the cam is such as to retard the timing of the pumping stroke when the charge delivered by the pump is increased so that pressure built up in the pump is delayed and injection pressure is reached at a substantially constant crankshaft angle regardless of variations in speed and load on the engine. The mechanism is failsafe since it cannot interfere with the movement of the throttle shaft to reduce fuel delivery.

Abstract: A fuel injection pumping apparatus includes an injection pump having a piston which can be subjected to a varying fluid pressure to determine the timing of injection of fuel. Resilient means is provided to bias the piston and a member is provided to act as a stop for the piston. The member is coupled to a temperature responsive device whereby when the engine is cold, the stop determines the position of the piston so that a predetermined timing is obtained for starting the engine. The stop moves when the engine is warm to permit the piston to vary the timing of the apparatus over the full range.