Abstract: A fuel supply apparatus includes: a high-pressure pump driven by an engine and ejecting high-pressure fuel; a delivery pipe storing the high-pressure fuel ejected from the high-pressure pump in a pressurized state; and a high-pressure regulator having a valve and a valve seat, and adjusting the fuel pressure in one of the high-pressure pump and the delivery pipe. At least one of abutment surfaces of the valve and the valve seat is set to have a hardness of Hv800 or more.

Abstract: A system and method for controlling fuel delivery from a fuel injector includes determining engine speed, determining a proposed pilot pulse width time based on engine speed, determining injection pressure, determining a proposed first quantity of fuel to be delivered by the fuel injector based on the proposed pilot pulse width time and injection pressure and determining a desired engine torque output. A desired total quantity of fuel to be delivered by the fuel injector is determined based on the desired engine torque output and engine speed. The proposed first quantity of fuel is compared with the desired total quantity of fuel. A desired first quantity of fuel to be delivered by the fuel injector is determined based on the desired engine torque output and engine speed if the proposed first quantity of fuel is greater than the desired total quantity of fuel. A desired pilot pulse width time is determined based on the desired first quantity of fuel and the injection pressure.

Abstract: A two stage pressure relief valve for releasing a fluid under pressure includes a body having a bore extending from an inlet and terminating in an outlet. A first chamber which communicates with the inlet and a second chamber which communicates with the first chamber and the outlet are provided and are dimensioned such that the cross sectional area of the second chamber is greater than that of the first chamber. An operator seat is disposed within the body and an operator is moveably disposed within the bore and engages the operator seat. The operator includes a blocking surface which blocks at least a portion of the flow of fluid. When the pressure of the fluid exceeds a threshold pressure, the operator is unseated whereby fluid flows at a first flow volume such that at least a portion of the fluid impinges the blocking surface causing the blocking surface to move within the second chamber whereby fluid flows at a second flow volume. The second flow volume being greater than the first flow volume.

Abstract: A fuel delivery system (10) used on marine vessels (B) has a fuel injected, internal combustion engine (E) for propulsion. A fuel tank (T) stores fuel (F) supplied to run the engine through a supply line (L) extending between the fuel tank and the engine. The tank has a relatively small (1.6 in. diameter) opening (O), and a fuel pump (12) is sized to fit within the fuel tank through this opening. The fuel pump pumps fuel, under pressure, from the fuel tank to the engine. A fuel filter (20) is also sized to fit within the tank and is connected to an inlet (14) of the fuel pump. Fuel is drawn into the fuel pump through the fuel filter. A pressure regulator (30) regulates the pressure of fuel pumped to the engine. The pressure regulator is mounted externally of the tank and the fuel pump is tethered to the pressure regulator for the fuel pump and fuel filter to be installed in the fuel tank without use of external supporting structure.

Abstract: A system for delivering fuel to a motor vehicle engine includes a fuel sending unit and a self-cleaning filter. The fuel sending unit is in fluid communication with the engine, which in the preferred embodiment is a fuel injected engine. A fuel regulator is provided interbetween the fuel sending unit and the engine which delivers a first portion of the fuel to the engine. A second portion of the fuel is delivered to the filter for the sending unit through a reverse path for purging the filter of debris collected from the fuel.

Abstract: A fuel or air system component for a motor vehicle, constructed with shape memory alloys, to control fuel flow as a function of temperature or electrical means. The shape memory alloy changes shape at a defined temperature, or in a particular temperature range, thereby affecting a control feature internal to a component in the fuel system, and as a result, changing the fuel flow and/or pressure characteristic. The component may be a biasing spring. The shape memory alloy is an intermetallic compound or alloy which exhibits a shape transformation when heated or cooled through its transformation temperature.

Abstract: A fuel injection system for supplying fuel from a fuel source to an internal combustion engine having at least one combustion chamber, the engine preferably powering an outboard motor, is disclosed. The fuel injection system comprises at least one fuel injector for supplying fuel to the combustion chamber of the engine, a pump delivering fuel at high pressure to at least one fuel rail arranged to deliver fuel under high pressure to the at least one fuel injector, a pressure sensor for detecting a pressure of the fuel in the fuel rail, and a valve controlling a by-pass passage through which a portion of the fuel pumped by the pump may be selectively diverted away from the fuel rail, based upon the fuel pressure detected by the pressure sensor.

Abstract: The invention relates to a pressure regulator for a fuel system. The pressure regulator includes a housing assembled out of at least two housing parts. A membrane unit is securely installed in a sealed fashion between the housing parts. The securing region that securely holds the two housing parts and the membrane unit in a sealed fashion has an elastic region so that the desired secure connection is assured by simply snapping the two housing parts together. The device is provided in particular for regulating a pressure in a fuel system.

Abstract: Fuel supply system (1) for a combustion engine, which includes a fuel tank (2) suitably supplied with a fuel filter (3) and a duct (4), which connects the fuel tank (2) with a fuel supply unit (5), for instance a carburetor or a fuel injection system. A pressure regulator (6, 7) is, rigidly or flexibly, mounted to one side of the tank (2), suitably the upper side, and is immersed, entirely or mainly, in relation to the tank side, and the pressure regulator is connected somewhere in between the duct's (4) inlet inside the tank (2) and its outlet out of the tank.

Abstract: A compensator is described for use on those manifold fuel injectors for gasoline engines which utilize a gas pressure cycler to vary the instantaneous rate of liquid fuel injection in proportion to the instantaneous rate of engine intake air flow into each engine cylinder during each intake stroke. The compensator adjusts liquid fuel injection pressure by bleeding adjustable air quantities out of the gas pressure cycler during pressure rise, and then subsequently returning these bleed masses into the gas pressure cycler during pressure decrease. A compensator of this invention is of relatively simple mechanical design, and uses a moderately complex electronic controller.

Abstract: A fuel system priming method for an internal combustion engine having a returnless fuel system and electronic fuel injection includes sensing fuel pressure rate of rise during priming. The fuel pump is first activated to pressurize the system and then the injectors are controlled for a short interval in response to the sensed rate of pressure rise to vent trapped air in the fuel system. The fuel pump is then activated again to pressurize the fully primed fuel system for quick engine starting.

Abstract: A pressurized fuel system for a motor vehicle is provided with a pressure regulator which opens above a predetermined limit pressure so that the not required fuel can flow by way of a return flow pipe into the fuel tank. Behind the pressure regulator, a check valve is connected in the direction of the engine.

Abstract: A fuel supply system for an internal combustion engine in which a fuel pump pumps fuel from a fuel tank to a fuel distributor and a pressure regulator is connected between the fuel pump and the fuel distributor to respond to pressure of the fuel pumped by the fuel pump, to return fuel back to the fuel tank as a function of the pressure of the pumped fuel, a pressure reducer being disposed between the pressure regulator and the fuel distributor to reduce the pressure of the fuel delivered to the fuel distributor to a value lower than the pressure of the fuel at the pressure regulator.

Abstract: The fuel and air supply system of the present invention provides fuel from a fuel pump at a first pressure upstream of a pressure reducer, fuel being provided directly to the fuel injector at a reduced pressure on the downstream side of the pressure reducer. A bypass line in communication with the fuel line upstream of the pressure reducer provides fuel to an air reservoir at the first pressure. The air reservoir lies in communication with a porous member(s) in the fuel injector in an air inlet to a fuel volume within the injector upstream of the pressure reducer. Upon flow of fuel into the air reservoir and closure of normally open fuel and air valves in the reservoir, air at the first pressure is supplied the porous member(s), creating a pressure differential across the member(s), causing air to flow through the porous member(s) to form air bubbles in the fuel volume for two-phase flow through the fuel injector orifice.

Abstract: A valve in a fuel pressure regulator prevents liquid fuel from being emitted exteriorly of the regulator housing and onto heated engine components. In the preferred embodiment, the valve allows gaseous flow into a chamber of the regulator when the pressure within the chamber is lower than the pressure of gases exterior of the regulator but prevents gaseous flow from within the chamber to the exterior of the housing. In other embodiment an air-bleed passage is provided in the valve to allow gaseous flow from within the chamber to the exterior of the regulator.

Abstract: For a fuel injected engine with a no-return fuel system, a fuel rail assembly with an integrated fuel pressure regulator. The fuel rail assembly has a plurality of spaced apart fuel injector sockets each communicating through a fuel passage with a demand pressure regulator removably mounted on the fuel rail upstream of all the fuel injector sockets to regulate the pressure of all fuel supplied to fuel injectors received in the sockets.

Abstract: A fuel supply system for an engine comprises a fuel pump for supplying fuel to fuel injectors, a pump controller which increases the fuel delivery flow rate from the fuel pump during hot restarting or high load running of the engine and a pressure regulator disposed in a fuel supply passage between the fuel pump and the injectors for adjusting the fuel supply pressure at which fuel is supplied to the injectors. The pressure regulator adjusts the fuel supply pressure according to an excess fuel flow rate of fuel returned to the fuel tank from the pressure regulator to a low-pressure side control pressure region over a first excess fuel flow rate range and to a high-pressure side control pressure region over a second excess fuel flow rate range.

Abstract: A fuel injection pump having an inlet metering valve for supplying a metered quantity of fuel from a transfer pump to a pumping chamber and an auxiliary control system for limiting the maximum quantity of fuel supplied to the pumping chamber via the inlet metering valve. An auxiliary valve piston is axially shiftable by the transfer pump outlet pressure to provide a variable restriction between the transfer pump and metering valve for establishing a maximum fuel quantity limit within a predetermined speed range of the pump. A low-speed fuel passage is provided in parallel with the variable restriction for establishing a maximum fuel quantity limit within a lower speed range. The back pressure chambers of the auxiliary valve piston, a transfer pressure regulator piston and a pump timing piston are connected to a pump housing cavity to equalize the back pressures in those chambers at the same constant pressure maintained by a housing pressure regulator.

Abstract: A fuel injection control mechanism for use in a fuel system is adapted to be connected between a fuel injection pump and a fuel injector. The mechanism includes a main passage, a chamber, a primary valve connecting the main passage to the chamber, a piston disposed within the chamber, a spring biasing the piston toward the primary valve and an adjustment compartment. A wall separates the chamber from the adjustment compartment, and a removable cap encloses the adjustment compartment. Apparatus is provided for adjusting the biasing force of the spring and travel limits of the piston. Adjustment can be accomplished to vary fluid characteristics in the fuel delivered to the injector without the need to disassemble the mechanism or disconnect the mechanism from the fuel system.

Abstract: A spill valve for a fuel injection pump includes a valve member movable towards a seating to prevent spillage of fuel from the pumping chamber of a fuel injection pump. The valve member is actuated by a piston against which fluid pressure can be applied to close the valve member onto the seating. The movement of the valve member away from the seating is limited by a stop member but this can move to allow increased movement of the valve member when fuel at high pressure is spilled from the injection pump.

Abstract: In a fuel delivery system that includes a pump for supplying fuel under pressure from a supply to an internal combustion engine and a pressure regulator for returning excess fuel from the engine to the supply, a check valve is positioned between the pump and the engine for preventing back-flow of fuel from the engine to the pump. The valve has a flow passage with a central axis and a valve seat orientated away from the pump. A valve element is positioned within the passage for axial motion against a coil spring as a function of fuel flow from the pump. A first portion of passage surrounding the valve element has a cross section to fluid flow that increases substantially monotonically from the seat for an axial distance that at least corresponds to maximum travel of the valve element against the spring.

Abstract: A fuel pressure regulator valve for a fuel rail requires only a single conduit between the tank-mounted fuel pump and the fuel rail, thereby eliminating the need for a separate, and additional, return conduit for returning excess fuel to the tank. It does this by a spring-biased check valve in the inlet to the fuel chamber of the regulator. The check is biased to prevent flow from the pump into the fuel chamber of the regulator, but when the pressure in the rail drops below a certain level, a post on the diaphragm that separates the fuel chamber of the regulator from a control chamber of the regulator, unseats a spherical valve element in the check valve to allow pumped fuel to enter the fuel chamber of the regulator and pass into the fuel rail to the fuel injectors. When the pressure has built up beyond a certain pressure, the sphere again closes.

Abstract: A fuel injection and control system for a V-type, two cycle, crankcase compression, internal combustion engine. The fuel injection system includes fuel injectors positioned in the valley of the engine and which are supplied with fuel under pressure from a fuel tank through a line in which a fuel filter and fuel pump are positioned. The fuel pump and fuel filter are disposed at one end of the engine and the amount of pressure supplied to the fuel injectors is controlled by a pressure regulator that regulates pressure by bypassing excess fuel back to the fuel filter upstream of the filter element. A throttle control and throttle position sensor are disposed at the opposite end of the engine and exhaust control valves are provided outside of the valley of the "V" of the engine.

Abstract: In an assist-air type fuel injection device for an internal combustion engine in which an assist-air for atomizing fuel is supplied toward an injected fuel on the lower stream of a nozzle hole of a fuel injection valve, a pressure detection part for detecting a pressure of the above assist-air is provided at the fuel injection valve, and the pressure of the assist-air detected at the above pressure detection part is supplied as a signal pressure to a pressure regulator for regulating a fuel supply pressure to the fuel injection valve. Without being affected by the assist-air pressure, a fuel flow rate can be stabilized, whereby control accuracy of the fuel injection amount can be maintained favorably.

Abstract: A fuel delivery arrangement for a fuel injected engine 12 has a single fuel line 16 extending from an in-tank fuel pump 14 to a fuel rail 18. Included within the fuel line 16 is a check valve 24 which allows fuel flow from the tank to the fuel rail but which prevents return flow while allowing any trapped fuel between the fuel rail and the check valve to expand to reduce pressure.

Abstract: A known fuel injection apparatus, in which fuel and foreign matter outside the fuel injection valve can not flow past the injection valves because a flow opening is disposed between fuel supply conduit and fuel outlet conduit and of which degassing of the fuel takes place before it enters the injection valve, any foreign matter entrained in the fuel will not give rise to malfunctions in a pressure regulation. The penetration of foreign matter into the pressure regulator is prevented by means of an appropriate choice of the dimensions of the flow opening, which is provided between a filter element of the fuel injection valve and the wall of a receiving bore. The fuel injection apparatus is employed in fuel injection systems for mixture compressing internal combustion engines with externally supplied ignition.

Abstract: A pressure control valve having a valve body 2 consisting of metal material and a spring 10 determining the control pressure of the valve and designed as a flat pressure spring with radial arms, the spring being arranged in a chamber 20 of valve body 2 which is connected to the ambient atmosphere or to the inlet of the internal combustion engine. The flat pressure spring 10 is placed under tension between a deformable bead 12 of valve body 2 and a membrane cap 11 and the tension force of the spring is adjusted by deforming the bead 12.

Abstract: A fuel pressure regulator including a high pressure fuel supply chamber (18), a low pressure diaphragm chamber (19), a valve mechanism (21-24) for controlling the flow of fuel between the high and low pressure chambers, and a resilient impervious diaphragm (31) within the low pressure diaphragm chamber and coupled to the valve mechanism for imparting pressure fluctuations in the low pressure diaphragm chamber to the valve element of the valve mechanism. The fuel pressure regulator includes an array of alternating valve guide surfaces (58) and fuel flow channels (59) disposed about the valve element (23,24) for restraining the reciprocating movement of the valve element to and from a valve seat. The fuel flow channels provide a fuel flow design that uniformly delivers fuel through the valve mechanism into the low pressure diaphragm chamber.

Abstract: A fuel regulator for controlling one or more carburetors and having a return to the fuel tank arrangement. The invention comprises a unique arrangement of an hourglass shaped plunger that permits virtually unrestircted flow through the body of the regulator from the inlet to the one or more ports which lead to the single or multiple carburetors. A method of operation wherein the return fuel flow is never completely shut off is provided during normal operation. This provides the advantages of reduced demands on the manufacture of the return line seat, and always permits at least some flow through the return line during the normal operation. Thus, a highly efficient, high volume, low pressure regulator for carburetted, high performance engines is provided.

Abstract: A fuel pressure control valve wherein a pipe press-fit opening 15a is formed on a housing 11 constituting a control valve chamber 16 together with a diaphragm 12, a mounting flange 26 is projectedly provided on the outer surface of this housing 11 and a return pipe 17 is press-fitted into a pipe press-fit opening 15a. A boss portion 33 is expandedly provided at a rear surface of the housing 11, which is opposite to the mounting flange 26, and seat surfaces 32 and 34 for receiving a jig during press-fitting of the return pipe 17 into the pipe press-fit opening are formed at end faces of the mounting flange 26 and the boss portion 37, in a flat plate shape and in a parallel alignment between one end face with the other.

Abstract: A fuel pressure regulator (10) for automobiles and the like comprises a body lower portion (11), an upper cover (12) and a resilient diaphragm (66) therebetween. The resilient diaphragm (66) separates an upper chamber (61) from a fuel outlet chamber (21). A passageway (22) extends between the fuel outlet chamber and a fuel inlet chamber (14). A spherical ball valve (29) and a cylindrical valve seat (26) are positioned at one end of the passageway (22). A removable plug (32) carries guide legs (33) for guiding the ball valve (29) and further carries a biasing spring (31) for biasing the ball valve (29) into a closed seating position. A piston (51) is positioned below the resilient diaphragm in the fuel outlet chamber (21) and has depending therefrom an elongated stem (52) which is received in a stem guide (53), with the stem guide having a tapered portion (54) extending into the passageway (22).

Abstract: An improved pressure regulator for use with automotive engine fuel pumps wherein the ball is constrained for motion in a cage within the inlet chamber. The cage is made up of three simple cylindrical pins press fitted into an end cap. The inlet chamber is oversized with respect to the maximum dimensions of the caged ball array. In this manner, upon opening of the ball off of its seat, virtually no impediment to full flow of the maximum fuel pump capacity through the regulator is achieved.

Abstract: A fuel injection system has a fuel injector provided for injecting fuel directly in a cylinder of an engine and a fuel pump for supplying the fuel to the fuel injector passing through a fuel supply passage. Two fuel return passages are provided for communicating the fuel supply passage with a fuel tank. A high pressure relief valve is provided in one of the fuel return passages and a low pressure relief valve is provided in the other fuel return passage. A changeover valve is provided for selectively connecting the fuel supply passage with one of the fuel return passages in accordance with load on the engine, thereby providing a high fuel pressure or a low fuel pressure in the fuel supply passage.

Abstract: A fuel injection system is provided with a purging device (14) for purging gas, including air and vapor, from the system. The device includes a pressure responsive valve (22) permitting gas to flow from an inlet (16) connected to the high pressure fuel injection line (8) to a vent outlet (18), and blocking flow when gas has been purged from the system and fuel pressure rises. A first branch passage (24) communicates between the inlet (16) and one side (26) of the valve (22), and a second branch passage (28) communicates between the inlet (16) and the other side (30) of the valve (22) and also with the outlet (18). A restriction orifice (34) in the second branch passage (28) provides a fuel pressure drop thereacross but does not substantially drop gas pressure thereacross, such that pressurized fuel causes a higher pressure on the one side (26) of the valve (22) than on the other side (30) of the valve ( 22), which pressure differential closes the valve.

Abstract: The invention relates to a fuel supply device for model aircraft. To produce an excess pressure in the fuel tank in order to force the fuel into the engine, the fuel tank is connected to an excess pressure chamber (4) of an exhaust constructed in the form of a silencer. The casing (1) of the exhaust is subdivided by partitions (5, 6) into a number of chambers lying axially one behind the other. The excess pressure chamber (4) and the chamber (3) disposed therebehind in the direction of flow and directly connected to the exhaust gas outlet (9) are interconnected via a valve arrangement (16-18) which so operates after the fashion of a non-return valve that the valves are throttled in dependence on the inclined position of the exhaust. During climbing throttling is particularly heavy, so that a heavier excess pressure is formed in the chamber and therefore higher delivery pressure acts on the fuel in the tank. In this way the engine is supplied with enough fuel even during climbing.

Abstract: Method and apparatus for fuel injection to an internal combustion engine is disclosed. Gas is supplied to a fuel holding chamber to maintain a reference pressure which is above atmospheric pressure in the fuel holding chamber. A metered quantity of fuel is delivered into the holding chamber against the reference pressure. Communication is established between the holding chamber and the engine, and the supply of gas to the holding chamber is maintained while the communication exists so the pressure of the gas is sufficient to displace the metered quantity of fuel from the holding chamber to the engine.

Abstract: A fuel rail for internal combustion engines utilizing fuel injectors which includes an elongate housing having an internal chamber with a fuel inlet near one end and a fuel outlet leading to a pressure regulator valve. The chamber is divided longitudinally by a flexible metal membrane which absorbs pulsations created by the injectors and stabilizes the fuel supply to the fuel injectors.

Abstract: In an aggregate for supplying fuel from a fuel container to an internal combustion engine of a motor vehicle, a housing of a pressure wave-damping device, connected to an outlet of the pump of the aggregate, has an enclosed interior subdivided into two separate chambers by a diaphragm. The first chamber is connected to the outlet of the pump and has its own outlet whereas the second chamber has a damping spring accommodated therein. The housing is formed of two opposite shell portions positioned opposite to each other. A ring-shaped flange is provided, which is a portion of the housing, and which holds the peripheral edge of the diaphragm and embraces the rims of the shell portions of the housing.

Abstract: A fuel injection apparatus for an internal combustion engine, which comprises an accumulator for storing therein pressurized fuel while maintaining the pressure thereof at a predetermined high level. A fuel injection valve is arranged to inject the pressurized fuel in the accumulator into a combustion chamber of the engine. The injection valve is controlled to open and close by an output signal from an external control unit. A pressurizing pump is arranged to pressurize the fuel delivered from a fuel-feed pump and to supply it into the accumulator through a check valve.

Abstract: In a fuel injection system having an injector which delivers fuel to an engine in discrete injection events, a valve assembly shuts off fuel flow to the injector if the fuel flow during an injection event exceeds a desired upper limit.

Abstract: A fuel metering apparatus is shown as having a throttle body with an induction passage therethrough and a throttle valve for controlling flow of induction air through the induction passage, first and second passages are provided with the first passage having an inlet at one end and communicating at its other end with a source of fuel, the second passage has an inlet at one end and communicates with the flow of induction air thereby serving as a metered fuel discharge nozzle, fuel at a regulated superatmospheric pressure is delivered as through a movable tubular member and discharged through an open end thereof in a manner whereby such discharged fuel is alternately directed toward the inlet of the first passage and toward the inlet of the second passage, a magnetic field is cyclically produced as to thereby cause movement of the movable tubular member as to thereby cause such discharged fuel to be alternately directed to the inlets of the first and second passages, the portion of the fuel directed to the inle

Abstract: A fluid lubricating circuit for an internal combustion engine which can effectively damp or reduce fluid pressure pulsation in the circuit. To this end, the circuit includes a pressure damper connected between a hydraulic pump and an oil cooler. The pressure damper has formed therein a pair of orifices disposed in a spaced relation from each other in a direction of fluid flow and a damping chamber between the orifices.

Abstract: Disclosed herein is an apparatus for supplying fuel to an internal combustion engine. The apparatus comprises an air regulator located at an air passage between a nozzle and an air pump for generating an air pressure P.sub.a and maintaining a pressure differential between pressure in an air intake passage and the air pressure P.sub.a at a predetermimed value corresponding to engine operations, a fuel regulator located at a fuel passage between the nozzle and a fuel pump for generating a fuel pressure P.sub.f and maintaining a pressure differential between pressure in the air intake passage and the fuel pressure P.sub.f at a predetermined value corresponding to engine operations, an air sensor for sensing the amount of suction air to the air intake passage and outputting a signal corresponding to the amount of suction air, a computer for receiving the signal from the air sensor and outputting a signal corresponding to a predetermined pressure differential between the air pressure P.sub.

Abstract: The vane-cell pump of a fuel injection pump for internal combustion engines has one or more adjustable throttle restrictions disposed on the intake side and/or on the compression side.By adjusting the particular throttle restriction, the slope of the characteristic curve of the course of the supply pump pressure can be influenced. In this way, it is possible to effect an increase in the slope over the entire rpm range, an increase only in the upper rpm range, or a lesser increase in slope only in the upper rpm range. The invention contemplates several embodiments which essentially cover location of the throttle restriction in the fuel injection pump.

Abstract: A fuel injection system wherein the fuel pressure can be varied or adjusted n accordance with different engine loading conditions. The system includes an accumulator and a source of high-pressure gas for raising the accumulator pressure in accordance with step increases in the fuel pressure. A pressure-operated piston valve is provided to communicate the accumulator with the gas pressure source or with an atmospheric vent, as necessary to raise or lower the accumulator pressure.

Abstract: An apparatus for controlling the ratio of air to fuel quantity of the operational mixture to be introduced into the combustion chambers of an internal combustion engine which includes an air flow rate meter moving under differential pressure against a constant hydraulic restoring force, which air flow rate meter adjusts a metering cross section in a supply line leading to a fuel injection pump, with the pressure drop at the metering cross section being maintained constant with the aid of a differential pressure valve. The air flow rate meter is part of a known apparatus which controls the fuel component in accordance with the quantity of aspirated air and also controls the component of exhaust gas to be fed back.

Abstract: A check valve central metering system for delivering determinable quantities of fuel to at least one fuel injection valve or injector of a fuel injected engine. The check valve central metering system containing a bi-level pressure regulating means, a 3-way valve, a check-valve, return lines and orifice interconnecting a fuel pump to a fuel rail adapted to receive at least one injector and connected in a fuel circulating mode during times not involving fuel injection and a dead-ended configuration during times involving fuel injection.

Abstract: A liquid fuel injection system with a snubber valve assembly with a low cost, four-part snubber valve mounted within a valve body and in addition in a second embodiment a low cost, two-part fuel pressurizing valve mounted within the valve body upstream of the snubber valve.

Abstract: A fuel injection pump, especially for internal combustion engines, which includes a pump piston axially displaceable in a cylinder of a pump housing and operable by a cam of a camshaft through the intervention of a rocker. For controlling the quantity of the fuel to be injected, the circumference of the piston is provided with an oblique control groove for cooperation with a control bore in the cylinder. The rocker is pivotally connected to the pump piston and in spaced relationship to the piston is under the load of a spring determining the maximum injection pressure. Between the area where the spring acts upon the rocker and where the rocker is pivotally connected to the pump piston, the rocker is provided with a roller adapted to roll on the cam while the spring presses the rocker in fuel feeding direction against an abutment.

Abstract: A control arrangement for a supercharged diesel engine, which is equipped with an injection pump and with a governor at the injection pump, as well as with a full-load abutment movable as a function of the engine rotational speed for the limitation or release of the injection quantity. The full-load abutment is thereby constructed as three-dimensional cam which is dependent in the direction of its second dimension on a magnitude changing analogously to the supercharging degree or on the supercharging pressure.