Abstract: A fuel injection pumping apparatus comprises piston means slidable in a bore from one end of which extends a fuel outlet for connection to a nozzle. A fuel inlet is connected to the one end of the bore and a valve controls flow through the inlet into the bore. The piston means is actuated by liquid under pressure supplied by a plunger actuated by an engine driven cam located in a cylinder. A two way valve is provided to control flow of liquid from the cylinder either to the bore or to a source of liquid, the valve being controlled by an electrically operated actuator. The actuator is controlled by a control circuit which receives a signal from a transducer associated with the piston means.

Abstract: In compact vehicle diesel engines, injection pumps are accessible only with difficulty for the purpose of adjusting a starting time of fuel delivery. An adjusting device is provided which includes an adjusting bolt or screw which may easily be reached from a top side of the engine. The adjusting bolt or screw includes a collar which is adapted to engage in a corresponding annular slot provided in an installation flange of a housing of the fuel-injection pump. A threaded portion of the adjusting bolt or screw is threadably accommodated in a threaded member pivotably fastened to the engine. When the adjusting bolt or screw is turned, the injection pump may be rotatably adjusted while a camshaft of the fuel-injection pump, connected to a timing drive of an internal combustion engine, remains in a previous position, thereby varying the start time of fuel delivery of the fuel-injection pump.

Abstract: A fuel injection timer or regulator for a fuel injection pump is acted upon by a signal of an actual value generator detecting an actual injection time adjustment and by a signal of a desired value generator controlled by operating parameters of a piston internal combustion engine. At least one sensor is arranged at the piston internal combustion engine, with the sensor determining a rate of increase of the combustion pressure in the cylinder at each working stroke, and the desired value generator is controlled in dependence upon the output signal of the sensor.

Abstract: Residual pressure control means corresponding in number to the cylinders of the engine are connected between the delivery valves of the fuel injection pump and the respective injection pipes. The residual pressure control means are interconnected in an arrangement corresponding to the sequence of fuel injection through the delivery valves. Each of the control means is adapted to transfer the injecting fuel pressure present therein on its injection nozzle side to its next control means when the same injecting fuel pressure exceeds the injection fuel pressure present therein on its injection pump side at the termination of each fuel injection, to obtain increased injection pressure of fuel injected by an injection nozzle associated with the above next control means during the immediately following fuel injection.

Abstract: An apparatus is proposed which serves to form the operating mixture for internal combustion engines, in particular for mixture-compressing engines having externally supplied ignition. The apparatus includes an air measuring device having a control body, which has a circularly curved control section and an actuation section. In accordance with the forces of the air which engage the actuation section, the control body, with its control section, opens a flowthrough opening in a mixture forming section to a greater or lesser extent. The control body is rotatably supported, concentrically with a throttle valve, and is connected with a metering needle which protrudes through a metering opening, at which point a greater or lesser fuel quantity is metered in accordance with the rotational movement of the control body.

Abstract: A combustion engine is shown with a fuel metering device having a fuel reservoir or fuel bowl with such, in turn, having a float-controlled fuel inlet valve; a fuel supply conduit leading from a vehicular fuel tank to the inlet of the fuel bowl has a normally open solenoid valve and a flow meter situated in series therewith; a control device receiving signals indicative of engine speed and rate of fuel flow to the fuel bowl is effective to cause the solenoid valve to close and terminate further fuel flow whenever the numerical ratio of the rate of fuel flow divided by the engine speed exceeds a preselected magnitude of such a ratio or index.

Abstract: The reciprocating plunger reciprocable in the pump cylinder of a distributor type diesel fuel injection pump is helically splined to an index ratchet gear that is also operatively associated with a pawl detent whereby the index ratchet gear is rotatable in only one direction. The plunger has a discharge slot on its outer peripheral surface which registers with one of the plural discharge ports opening from the pump cylinder and the plunger controls the covering and uncovering of a fuel inlet port to the pump cylinder. Upon a pump stroke of the plunger, the index ratchet gear is rotated so that the next adjacent tooth is brought into alignment with the pawl detent to then prevent its rotation in the opposite direction during the suction stroke of the plunger.With the index ratchet gear thus fixed, the plunger is thus rotated on the suction stroke so as to align the discharge slot with the next adjacent discharge port.

Abstract: A drive mechanism for a fuel injection pump of an internal combustion engine, wherein a drive sprocket and an injection timer unit are arranged in a crankcase of the engine on a drive shaft connected to the camshaft of the fuel injection pump. The drive shaft is formed by a socket sleeve and is floatingly supported on the camshaft.

Abstract: A hydraulic device with fluid pockets formed by a gerotor gear set, including a rotatable and orbital rotor, has a special commutation valve structure for valving fluid flow to and from the fluid pockets in timed relation to the movement of the rotor. The gear set is disposed between a pair of housing members. One end face of the rotor and the face of the adjacent housing member cooperate to define separate pressure areas which are continuously communicated with high and low fluid pressures, respectively. The other end face of the rotor has a circular array of openings which number twice the number of teeth of the rotor. A series of passages extending through the rotor communicate all of the openings of the circular array with the separate pressure areas, alternate openings being communicated with areas at different pressures. The face of the housing member adjacent the other end face of the rotor has radially extending, generally T-shaped recesses facing the fluid pockets.

Abstract: A diesel engine may have an electrically-actuated cold starting device in its inlet manifold, gravity fed with fuel from a reservoir interposed in a pipe for returning excess fuel from the injectors and injection pump to the vented fuel tank. If the pipe opens below the fuel level in the tank because the latter is full, or if oil is retained in the pipe by capillary action when the tank is not full, air cannot reach the reservoir to permit fuel flow to the device when required. The reservoir outlet to the tank therefore includes a restriction from which fuel emerges as a jet while the engine is running, and a vent hole within the zone containing the jet. The velocity of the jet carries fuel past the vent hole without any loss of fuel through the latter. When the engine is not running, the vent hole connects the reservoir to atmosphere.

Abstract: A fuel supply system for a mixture-compressing combustion engine includes a main air channel containing a throttle valve with a suction pipe connected to the downstream end of the main air channel and extending to the inlet valves for the engine. An air quantity measuring valve is located in the main air channel upstream of the throttle valve. A carrier-air channel branches off from the main air channel between the air quantity measuring valve and the throttle valve. Spaced from the main air channel is a fuel metering nozzle which opens into the carrier-air channel. A proportioning valve is located in the fuel metering nozzle and is adjustable by the air quantity measuring valve.

Abstract: A fuel injection pump for internal combustion engine, of the type comprising a body, a rotary distributor mounted in the body, driven in timed relationship with the associated engine, at least one pumping member carried by the rotary distributor, an angularly movable ring surrounding the rotary distributor, means provided on the ring to move the pumping member thereby to effect injection of fuel as the rotary distributor rotates, a piston coupled to the ring and slidably mounted with respect to the body, which piston is subjected to a fluid pressure which varies with the speed of the engine, and a spring bearing on the body and arranged to oppose the movement of the piston under the action of said pressure, wherein there is a cup-shaped member interposed between the spring and the piston, a rod comprising a retaining surface for defining the end position of the cup, the rod being slidable with respect to the body, and an actuating member for defining the axial position of the rod.

Abstract: A fuel injection pump for diesel engines wherein a delivery valve is arranged in a flow passage or flow route supplying fuel to an injection nozzle. A delivery valve is arranged in the flow route or flow passage of the fuel with a duct, under the control of a further delivery valve, branching off from the flow route or flow passage of the fuel on a downstream side of the first delivery valve. A holding chamber is provided on a discharge side of the further delivery valve, with the holding chamber containing a spring-loaded movable wall and being in communication with a relief chamber by way of a spill port or overflow duct.

Abstract: A servo valve is arranged within a timer piston for displacement in response to fuel pressure variable as a function of the engine rpm. When there occurs a change in the fuel pressure, the servo valve is automatically displaced relative to the timer piston to open a passageway for supplying the above fuel pressure to a hydraulic oil chamber defined at one end of the timer piston to cause displacement of the timer piston for control of injection timing. When there is no change in the fuel pressure, the servo valve is positioned to close the passageway to hold the timer piston stationary. Further, means may be provided for adjusting the setting load of a servo spring urging the valve body of the servo valve against the above fuel pressure.

Abstract: A shutoff apparatus for distributor injection pumps in internal combustion engines is proposed. The apparatus may also be used as a means of overspeed protection, and under the effect of an electromagnetic pushing magnet it opens the high-pressure chamber of the injection pump in order to shut off the engine. The opening of the high-pressure chamber is effected without the use of a valve subjected to the injection pressure, by means of the axial displacement of a pressure-equalized annular cylinder, which causes a relief bore to come into coincidence with the high-pressure chamber. The displacement of the annular cylinder is effected under the pressing action of an electromagnet. The area of the high-pressure chamber located opposite the distributor piston is sealed off by a slidable plug, which is pre-stressed by spring force and is centered via the annular cylinder by the distributor piston.

Abstract: A fuel injection pump is proposed in which, at relatively low rpm, there is an outflow of a partial quantity of fuel for the purpose of prolonging the injection time. This outflow begins only after the injection has already begun.

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: A fuel system for an internal combustion engine includes a small accumulator in which fuel is stored, a fuel injection nozzle including an electrically operated means which controls fuel flow through the nozzle from the accumulator, and a transducer for providing a signal representing the accumulator pressure. An electrically operated valve is provided to control the flow of fuel from a pump to the accumulator and the system includes a control circuit for the valve. The control circuit is supplied with the signal provided by the transducer and also with a desired pressure signal which conveniently is obtained from a pressure map to which a signal representative of an engine operating parameter is supplied.

Abstract: A fuel injection pump, for internal combustion engines, wherein a fuel distributing plunger moves angularly and axially in synchronism with the rotation of the engine and which cooperates with a control sleeve which determines the beginning or termination of injection into the cylinders. The control sleeve is controlled by an electrical motor through the motor's rotating shaft which is biased by an urging device circumferentially. The motor shaft is rotated to a predetermined position where the amount of injected fuel becomes small enough to keep engine operation safe if the motor output force exerted on the motor shaft disappears owing to a defect occurring.

Abstract: A fuel evaporative emission control apparatus comprising a vessel having an adsorbent layer therein for adsorbing a vaporized fuel, and a vaporized fuel inlet conduit inserted in the adsorbent layer, wherein the improvement comprises a flow deflector of a hollow conical shape having a diameter gradually increasing upward, the deflector being embedded in the adsorbent layer, the vertical angle (.alpha.) of the flow deflector is adjusted to 60.degree. to 120.degree., the ratio (S1/S2) of the sectional area (S1) of the largest-diameter end portion of the flow deflector to the sectional area (S2) of the adsorbent layer is adjusted to 0.4 to 0.6, the ratio (a/b) of the distance (a) between the largest-diameter end portion of the flow deflector and the top end of the adsorbent layer to the distance (b) between the largest-diameter end portion of the flow deflector and the side end of the adsorbent layer is adjusted to at least 1.