Abstract: Embodiments disclosed herein relate to internal combustion engines, combustion systems that include such internal combustion engines, and controls for controlling operation of the combustion engine. The internal combustion engine may include one or more mechanisms for injecting fuel, air, fuel-air mixture, or combinations thereof directly into one or more cylinders, and controls may operate or direct operation of such mechanisms.

Abstract: A fuel pump includes a fuel pump housing with a pumping chamber; a pumping plunger which reciprocates within a plunger bore; and an inlet valve assembly. The inlet valve assembly includes a check valve member which is moveable between an unseated position which provides fluid communication between the pumping chamber and a fuel supply passage and a seated position which prevents fluid communication between the pumping chamber and the fuel supply passage; and a solenoid assembly which includes a wire winding; a pole piece; an armature which is moveable between a first position when the wire winding is not energized and a second position when the wire winding is energized; a return spring which biases the armature away from the pole piece; and a control rod which is moveable along the inlet valve axis independently of the armature.

Abstract: A method and system providing a pressurized fluid includes a pump having a pump inlet and a pump outlet, the pump to provide a fluid flow, a bypass path to direct the fluid flow from the pump outlet to the pump inlet, a load path having a load path pressure, the load path including: a fluid accumulator to accumulate a fluid volume, and at least one load device, a bypass regulator valve in fluid communication with the pump outlet, the bypass path, and the load path, and a controller to direct the fluid flow to the load path in response to the load path pressure being less than a low load path threshold pressure via the bypass regulator valve and to direct the fluid flow to the bypass path in response to the load path pressure being greater than a high load path threshold pressure via the bypass regulator valve.

Abstract: A fuel manifold may be provided for use in a turbine engine. The fuel manifold may include four discrete segments including a first segment, a second segment, a third segment, and a fourth segment. The fuel manifold may also include a first line coupled to the first segment and the second segment and a second line coupled to the third segment and the fourth segment. The first line may be configured to supply a first portion of the fuel to the first segment and a second portion of the fuel to the second segment. The second line may be configured to supply a third portion of fuel to the third line and a fourth portion of fuel to the fourth segment.

Abstract: An internal combustion engine has a fuel system that has a fuel valve with a housing, wherein in the housing a fuel chamber is formed. A fuel pump pumps fuel from a fuel tank into the fuel chamber. A conveying pump provides forced conveyance of fuel into the fuel system. A feed line is connected to the fuel chamber of the fuel valve. The conveying pump is arranged in the feed line and supplies fuel to the fuel chamber. A relief line is connected to the fuel chamber of the fuel valve and a first valve is arranged in the relief line.

Abstract: A premixing apparatus for a gas turbine system includes non-swirl elements around a periphery of a face of a premixing apparatus and a swirl assembly located substantially at a center of the face. The non-swirl elements premix a premixture prior to the premixture being delivered to a combustor of the gas turbine system. The swirl assembly disturbs a flow of fluid prior to the fluid being delivered to the combustor. The premixture includes fuel and oxidant, and the fluid disturbed by the swirl assembly includes the oxidant or the premixture.

Abstract: In a fuel supply system for heavy oil common-rail injection systems for internal combustion engines, including a tank (1), a primary feed pump (3) for delivering heavy oil from the tank (1) to a high-pressure pump (5), wherein the high-pressure pump (5), via at least one high-pressure line (12), is connected to a high-pressure accumulator (rail) (6) feeding at least one injector (8), and, furthermore, a purge valve (9), which is connected to the high-pressure accumulator via a separate high-pressure line (15) for directing at least a portion of the heavy oil back into the tank (1) via a return line, the purge valve (9) includes a valve member (28) which is movable between an opened and a closed position, a high-pressure connection for a high-pressure line (15) communicating with a heavy oil high-pressure accumulator (rail) (6), a low-pressure connection for a return line, and actuating means for actuating the valve member (28), wherein the valve seat (29) of the valve member (28) is designed as a sliding seat

Abstract: The invention, described herein, is an improved Fuel Injection Servo (“Servo”) for the homebuilt aircraft. The Servo has been designed to allow the manufacturer to more easily fine tune the pressure differential over the air diaphragm. The Servo also provides an idle valve that the manufacturer and homebuilder can easily fine tune. In a second embodiment, the Servo is further adapted to replace the carburetor in smaller aircraft.

Abstract: A fuel injection system is described, and which has an upstream portion and a downstream portion. The upstream portion includes a source of fuel, the fuel inlet of a fuel injection servo or flow regulator, and a first fuel flow line connected in fuel flowing relation relative to the source of fuel and to the fuel inlet of the fuel injection servo. The downstream portion includes a flow divider, at least one fuel outlet of the fuel injection servo, and a second fuel flow line connected in fuel flowing relation relative to the flow divider and the fuel outlet of the fuel injection servo. A fuel accumulator pressure damper is mounted in fuel flowing relation relative to the downstream portion of the fuel injection system so as to substantially reduce standing waves in the fuel injection system.

Abstract: A fuel injection system is described, and which has an upstream portion and a downstream portion. The upstream portion includes a source of fuel, the fuel inlet of a fuel injection servo or flow regulator, and a first fuel flow line connected in fuel flowing relation relative to the source of fuel and to the fuel inlet of the fuel injection servo. The downstream portion includes a flow divider, at least one fuel outlet of the fuel injection servo, and a second fuel flow line connected in fuel flowing relation relative to the flow divider and the fuel outlet of the fuel injection servo. A fuel accumulator pressure damper is mounted in fuel flowing relation relative to the downstream portion of the fuel injection system so as to substantially reduce standing waves in the fuel injection system.

Abstract: The present invention provides a fuel control apparatus with a modular fuel pressure modifying mechanism (i.e., a fuel metering section) and modular fuel regulator mechanism (i.e.. r fuel regulator section) that can each be calibrated independently of each other, and independent from the modular air passage mechanism (i.e., an airflow section). The air passage mechanism has an air intake end and an air outlet end and is constructed and arranged to accommodate airflow therethrough. the air passage mechanism having a first surface portion formed on an outer surface thereon. The modular fuel pressure modifying mechanism is constructed and arranged to receive fuel from a supply and deliver a portion of the hid at a pressure that is different from the pressure of the fuel supply, the modular fuel pressure modifying mechanism being removably mountable to the first surface portion of the air passage mechanism.

Abstract: The present invention provides a fuel control apparatus with a modular fuel pressure modifying mechanism (i.e., a fuel metering section) and modular fuel regulator mechanism (i.e., a fuel regulator section) that can each be calibrated independently of each other, and independent from the modular air passage mechanism (i.e., an airflow section). The modular fuel pressure modifying mechanism is constructed and arranged to be calibrated prior to being mounted to the air passage mechanism. The fuel regulator mechanism is constructed and arranged to communicate with the airflow in the air passage mechanism and the modular fuel pressure modifying mechanism to regulate an amount of fuel delivered to the engine. The modular fuel pressure modifying mechanism and the modular fuel regulator mechanism are removably mountable to the modular air passage mechanism independently from each other.

Abstract: A control arrangement for a fuel system having a fuel pump (13) for supplying fuel through a variable orifice flow metering valve (15) to an engine main fuel control (45), the control (45) controlling the fuel pressure differential across the orifice of the metering valve (15). A head sensor includes a movable diaphragm (51), a bypass valve (47) for diverting fuel from the fuel pump away from the metering valve (15), and a coupling between the diaphragm (51) and the bypass valve (47) whereby the bypass valve (47) opens and closes in response to diaphragm (51) motion. The metering valve orifice fuel pressure differential is applied across the diaphragm (51) so that a valve spool (55) may open and close to maintain the pressure differential across the metering valve (15) substantially constant. A bias spring (54) normally biases the spool (55) closed.

Abstract: A system with which a correction of the fuel composition upon a change in the state of load of an internal combustion engine with which a mixture-forming device (4, 6, 8, 9, 11) is associated is constructed in structurally simple manner. The mixture-forming device has a feed unit (6) for the fuel with an inlet-side fuel conveyor line (5) and a discharge-side fuel conveyor line (7) and a movably mounted feed member (18). Depending on the position of the feed member (18), the feed member (18) provides variable fuel passage cross-sections in the feed unit (6). The feed unit is connected via an opening (31) which is closed in sealing fashion by a movable equalization element (33), the equalization space (32) being connected via a branch line (34) to the discharge-side fuel conveyor line.

Abstract: A combustion engine has apparatus effective to provide a fuel mixture of one or more liquid fuels such as gasoline of variable aromatic content, normal alcohols, cosolvents, octane improvers and hydrocarbons having different energy contents in an unknown combination and combine it with air in a controlled A/F ratio with an input from a fuel mixture dielectric constant sensor. The sensor comprises a capacitor in the fuel line near the engine so that the dielectric constant of the fuel mixture about to enter the engine determines the capacitance, a resistor in series with the capacitor, an oscillator providing an oscillating voltage across the resistor and capacitor at a high frequency of at least 1 MHz but less than a frequency requiring microwave components, and an electric circuit responsive to a capacitively determined electrical parameter of the capacitor such as the voltage thereacross to determine the capacitance thereof and therefore the dielectric constant of the fuel mixture.

Abstract: A method and a fuel injection system for supplying fuel to a mixture-compressing internal combustion engine having externally supplied ignition is proposed. The fuel injection system includes metering valves, downstream of which regulating valves are disposed and at one side of which the fuel pressure downstream of the metering valves prevails and on the other side of which the fuel pressure in a control pressure line prevails. The control pressure line communicates with the fuel supply line and is limited by a control throttle and a return-flow throttle; from it, a branch line leads to an electromagnetic supplementary injection valve, by way of which further fuel, in addition to the fuel injected via injection valves, can be injected. The triggering of the supplementary injection valve can be effected by an electronic control unit for injecting fuel during cold starting of the engine or in the presence of a measurement signal characterizing an acceleration of the engine.

Abstract: A fuel injection system is proposed which serves to adapt the fuel-air mixture as precisely as possible to operating conditions of the internal combustion engine. The fuel injection system includes metering valves, each of which is assigned a regulating valve whose movable valve element can be exposed on one side to the fuel pressure downstream of the respective metering valve and on the other side to a control pressure line defined on one end by a control pressure valve of the nozzle/impact plate type and on the other end by a control throttle. The control pressure valve has a permanent magnet and an electromagnet, the magnetic fluxes of which are guided via an armature in such a manner that in at least one air gap the magnetic fluxes of the permanent magnet and of the electromagnet extend in the same direction, while in at least one other air gap the magnetic fluxes of the permanent magnet and of the electromagnet extend in opposite directions.

Abstract: A fuel injection system is proposed which serves to adapt the fuel-air mixture as precisely as possible to operating conditions of the internal combustion engine. The fuel injection system includes metering valves, each of which is assigned a regulating valve whose movable valve element can be exposed on one side to the fuel pressure downstream of the respective metering valve and on the other side to a control pressure line defined on one end by a control pressure valve of the nozzle/impact plate type and on the other end by a control throttle. The control pressure valve has a permanent magnet and an electromagnet, the magnetic fluxes of which are guided via an armature in such a manner that in at least one air gap the magnetic fluxes of the permanent magnet and of the electromagnet extend in the same direction, while in at least one other air gap the magnetic fluxes of the permanent magnet and of the electromagnet extend in opposite directions.

Abstract: A fuel injection system which serves to adapt the fuel-air mixture accurately over a wide range to operating conditions of the internal combustion engine. The fuel injection system includes metering valves, with each of which a regulating valve is associated, the movable valve element of which can be acted upon on one side by the fuel pressure downstream of the particular metering valve and on the other side by the pressure in a differential pressure control line, which is defined on one end by a first electrofluidic converter of the nozzle/baffle type and on the other end by a first throttle. The first electrofluidic converter is triggerable in accordance with operating characteristics of the engine and determines the pressure in the differential pressure control line and thus, via the regulating valves, the differential pressure at the metering valves.

Abstract: A pressure control valve with an impact plate which serves as a regulator for a specific drop in pressure. The pressure control valve includes an armature disposed in an electromagnetic field established by an electromagnetic coil and a permanent magnetic field, with the armature being rotatably supported between two respective pole shoes located on each side of the armature. The pole shoes located on one side of the armature, in contrast to the pole shoes located on the other side, have an opposing magnetic polarity induced by the permanent magnet. The pole shoes which are not aligned opposite one another on armature 85, are approached by armature 85 with movement of the impact plate toward a valve seat, and causes an increase in the air gap planes facing the armature, as compared to the other two pole shoes, and thereby establishes a non-linear characteristic for the pressure control valve.

Abstract: An apparatus for the air-injection of liquid gas into the intake tube of an internal combustion engine. The apparatus includes a vaporizer pressure regulating valve, downstream of which a metering valve having a metering piston is proposed, which being movable in a guide bore opens a metering opening to a greater or lesser extent. The adjustment of the metering piston is effected in accordance with the quantity of air aspirated by the engine as determined by an air flow rate meter, as a result of which a quantity of liquid gas corresponding to the aspirated air quantity can be metered.

Abstract: It is proposed for a fuel metering system that a final control element be triggered with a regulated direct-current signal having clock components dependent on operating characteristics of an internal combustion engine in order to influence a fuel metering means. A further proposal is that the acceleration enrichment be triggered during starting. In this manner the desired starting enrichment is obtained by way of the sum of the post-starting, warm-up and acceleration enrichment. The acceleration enrichment per se begins beyond a predetermined air flow gradient and then has a steady course up to a maximum value. This subject is disclosed in combination with a continuously operating injection system, in which a corresponding overall control signal is prepared in a control unit and delivered to an electrohydraulic final control element.

Abstract: A method for supplying an internal combustion engine with liquefied petroleum gas (LPG) and a fuel supply system for the supplying the LPG into the intake manifold of an internal combustion engine are proposed. The fuel supply system includes a pump, which pumps LPG from an LPG tank at a predetermined pressure above its vapor pressure into a supply line, which leads via a heat exchanger to a metering valve. The metering valve has a metering piston, which is axially displaceable in a guide bore by means of an air flow rate meter and thereby opens a metering opening to a greater or lesser extent. Downstream of the metering valve, the metered LPG quantity flows via a regulating valve and through the heat exchanger, in which it at least partially evaporates and cools the LPG flowing to the metering valve. The supply of the metered LPG may be effected via a nozzle into the intake manifold upstream of a throttle valve.

Abstract: A fuel injection system is proposed which is triggerable in such a way that in the presence of control signals, in particular those characterizing engine overrunning, the fuel injection is interrupted. The fuel injection system includes metering valves to each of which one regulating valve is assigned, the valves each having a movable valve element which can be subjected on the one hand to the fuel pressure downstream of the respective metering valve and a spring and on the other hand to the pressure in a control pressure line. In the fuel supply line a pressure-reduction valve is provided upstream of the metering valve. During engine overrunning, the fuel pressure in the control pressure line is controllable by means of an electromagnetic valve in such a way that the fuel pressure in the control pressure line increases and the regulating valves close as a result of which the fuel injection is interrupted.

Abstract: A fuel/air ratio control apparatus for a reciprocating engine used in light aircraft including a fuel metering apparatus (32) and an electronic fuel/air ratio control (39). The control (39) generates an electrical signal (Wf/Wa) indicative of a desired fuel/air ratio based upon the flight condition of the aircraft and the metering apparatus (32) meters fuel flow (Wf) according to the mass airflow (Wa) ingested by the engine. The fuel metering apparatus (32) positions a metering valve (348) by means of a force balance of opposing forces developed by an air diaphragm (330) and a fuel diaphragm (336). The fuel diaphragm (336) is subjected to the differential pressure of a metering head pressure (Pu) and a fuel output pressure (Pm). The output pressure (Pm) is regulated by a controlled orifice (343) influenced by a proportional solenoid (406) whose armature valve (341) is positioned by the electrical signal (Wf/Wa).

Abstract: A fuel injection system is proposed which is triggerable in such a way that in the presence of control signals, in particular those characterizing engine overrunning, the fuel injection is interrupted. The fuel injection system includes metering valves to each of which one regulating valve is assigned, the valves each having a movable valve element which can be subjected on the one hand to the fuel pressure downstream of the respective metering valve and a spring and on the other hand to the pressure in a control pressure line. In the fuel supply line a pressure-reduction valve is provided upstream of the metering valve. During engine overrunning, the fuel pressure in the control pressure line is controllable by means of an electromagnetic valve in such a way that the fuel pressure in the control pressure line increases and the regulating valves close as a result of which the fuel injection is interrupted.

Abstract: A fuel injection apparatus is proposed for internal combustion engines with distributor and apportionment valves, which serves to apportion a quantity of fuel proportional to the induced air quantity. The distributor and apportionment valves of the fuel injection apparatus comprise a slide valve which is displaceable opposite a slotted bushing fixed in the valve housing and equipped with slots, in order to effect the variation of the current flow area of the apportionment valves. A control sleeve is interposed between the slotted bushing and the control slide and includes a portion which partially covers the control slots in the bushing to provide for fine control of the control slots in the bushing.

Abstract: A fuel injection system for supercharged internal combustion engines is proposed, which serves to meter a quantity of fuel adapted to the quantity of air aspirated by the engine and also serves to regulate the fuel-air mixture in accordance with operating characteristics of the engine. The fuel injection system includes an air flow rate member, the restoring force of which is generated by means of pressure fluid in a control pressure line. The pressure of the pressure fluid in the control pressure line is variable in accordance with at least one pressure control valve, by means of which the pressure in the control line and thus the restoring force exerted upon the air flow rate member, which actuates a control slide of a metering and distribution valve assembly, can be reduced when the intake tube pressure downstream of a compressor increases. The result is that an undesirable leaning down of the fuel-air mixture caused by the error in air density can be corrected.

Abstract: A fuel injection system is proposed which can be triggered such that when control signals characterizing engine overrunning are present, fuel injection is interrupted. To this end a pressure relief valve is provided, which opens in the presence of control signals characterizing engine overrunning and lowers the fuel pressure upstream of the fuel metering locations and accordingly upstream of the injection valves as well to below the opening pressure of the injection valves, so that no further fuel is injected via the injection valves during engine overrunning.

Abstract: A fuel injection system is proposed which serves to provide the most precise possible adaptation of the fuel-air mixture to operating conditions of the internal combustion engine. The fuel injection system includes metering valves, each of which is assigned one regulating valve, whose movable valve element can be exposed on the one hand to the fuel pressure downstream of the respective metering valve and on the other hand to the pressure in a control pressure line, which is limited on the one hand by an electro-fluid converter of the nozzle/bounce plate type and on the other hand by a control throttle. The electro-fluid converter is triggerable in accordance with operating characteristics of the engine.

Abstract: The present invention relates to a fuel injection system designed to supply fuel to a mixture compressing externally ignited internal combustion engine. The fuel injection system comprises an air metering member which is displaceable in a suction tube in accordance with the air flow rate and which displaces the movable part of a fuel metering valve in opposition to a resetting force which is produced by fuel operative in a pressure chamber into which projects an effective face of the movable part of the metering valve. The fuel is metered at the fuel metering valve under a specific pressure difference determined by the regulating valve means, the regulating valve means being influenced by the pressure in a control pressure line in which the pressure chamber is also disposed.

Abstract: A metering and distribution valve assembly is proposed for a fuel injection system of an internal combustion engine. The metering and distribution valve assembly includes a control slide having a head 68 and a control edge and a slotted sleeve with at least two control slits. The control edge opens the control slits to a greater or lesser degree in accordance with the relative motion between the control slide and the control slits in the slotted sleeve. An end face of the control slide adjacent to the control edge is exposed to a control pressure which is lower than the system pressure engaging the control edge. The pressure drop at the circumference of the control slide head formed between the control edge and the end face is capable of being influenced in such a manner that the control slide head rests unilaterally on the slotted sleeve at least during a portion of the displacement movement. As a result, better metering precision is obtained.

Abstract: A continuous fuel injection system for an internal combustion engine including a fuel metering valve 7 operating at a controlled pressure difference between chambers 13,14, the pressure difference being automatically adjusted by a regulating valve 17 including a diaphragm 18 separating two chambers 19,20. Chamber 20 is connected to relief 60 via a movable valve element 35 and the second chamber 19 is connected to the pressure upstream of the metering valve. The pressure difference is determined by a spring system acting on the diaphragm 18 including a stronger spring 33 which acts directly on the diaphragm and a weaker spring 34 which acts as a contact spring holding the valve body 35 lightly in contact with the diaphragm.

Abstract: A fuel injection system is proposed which can be triggered in such a manner that when control signals characterizing engine overrunning are present the fuel injection is interrupted. The fuel injection system includes metering valves, each of which is assigned one regulating valve, the movable valve element of which can be exposed on one side to the fuel pressure downstream of the pertinent metering valve and on the other side to the pressure in a control pressure line, which is limited on one side by a control throttle and on the other side by a control pressure valve. During engine overrunning, an electromagnetic valve which is disposed in a bypass that bypasses the control throttle or the control pressure valve or an electromagnetic valve in the control pressure line can be controlled in such a manner that the fuel pressure in the control pressure line increases and the regulating valves close, as a result of which the fuel injection is interrupted.

Abstract: A fuel injection device comprising an injection unit having a back pressure chamber and a fuel chamber which are separated by a diaphragm. The fuel chamber has on its lower end a fuel nozzle. A needle, cooperating with the fuel nozzle, is connected to the diaphragm. A flow control valve is arranged in the fuel feed passage connecting the fuel chamber to the fuel feed pump. The amount of the fuel injected from the fuel nozzle is controlled by the flow control valve so as to be proportional to the amount of the air sucked in. One end of the back pressure chamber is connected, to the pressure reducing chamber of the pressure reducing valve via a restricted opening and, the other end is connected to the fuel tank via the fuel return passage. An electromagnetic valve is arranged in the fuel return passage. An oxygen concentration detector is arranged in the exhaust passage of an engine.

Abstract: This invention relates to a fuel injection system.The fuel injection system has a fuel proportioning valve (3,4) which is supplied by a fuel feed line (39). The fuel proportioning valve supplies fuel to fuel injection valves (not shown) via a diaphragm valve 25. A differential pressure regulator 35 is provided to alter the pressure in the system in accordance with engine parameters. The pressure in the system is controlled by system pressure valve 41.In operation excess fuel is returned to fuel tank 70. When the engine is switched off a stop valve 63 closes the return line and valve 25 is closed in response to a drop in pressure in the differential pressure regulator 35, thus sealing the system and maintaining the pressure within the fuel supply part of the system to facilitate easy restarting. Seals 73 are provided in the fuel proportioning valve (3,4) to prevent fuel leakage from the seal part of the system between the valve 3 and valve cylinder 4 of the fuel proportioning valve.

Abstract: A fuel supplying device for an internal combustion engine having a fuel supply passage (4) for introducing fuel fed from a fuel pump (2) at a substantially constant pressure to a fuel injector (9) operative at a predetermined constant pressure. The fuel injector is installed at a congregated portion (7) of engine intake manifolds (8). A metering valve (11) includes a motor (13) so that drop is maintained substantially constant by a differential regulator (12). The metering valve is disposed in an intermediate portion of the fuel supply passage. Calculating means (15) including a servo signal generator (18) calculates an injection flow amount causing a predetermined air/fuel ratio on the basis of signals of various engine running factors. An operational signal output from the servo signal generating circuit of the calculating means is applied to the drive motor means for driving said metering valve to thereby inject fuel into the intake manifolds.

Abstract: A vacuum-operated air-valve actuator has a vacuum chamber held in communication with the intake air passage not only at a point between the air valve and the throttle valve but also at a point on the downstream side of the latter. In low load engine operation, the actuator is fed with a relatively high vacuum occurring on the downstream side of the throttle as well as with a lower vacuum in the Venturi and acts to increase the opening of the air valve. As the result, the vacuum in the Venturi, under which a fuel metering device operates, is reduced and accordingly the amount of fuel metered out is reduced to minimize the density of unburnt ingredients in the engine exhaust gases.

Abstract: An apparatus is proposed for the open-loop control of the composition of the operating mixture to be introduced into the combustion chambers of an internal combustion engine. In this apparatus, the dispensing of the aspirated air quantity is effected by means of an aspirated air throttle device, whose displacement complementarily adjusts the cross section of an exhaust gas recirculation line which discharges into the intake system downstream from this throttle device. The opening of the aspirated air throttle device in order to increase the quantity of aspirated air is effected by means of a control pressure delivered to a servomotor, counter to the force of a restoring spring. The control pressure is obtained from the comparison of the actual quantity of aspirated air with the fuel injection quantity. The initial pressure for establishing the control pressure is the supply pressure of a supply pump supplying the fuel metering device.

Abstract: A fuel injection system is proposed which brings about an improvement in the acceleration behavior of an internal combustion engine. The fuel injection system includes an intake manifold having a measuring device arranged therein which is moved against a restoring force in accordance with the quantity of air flowing therethrough and thereby actuates the control slide of a distribution valve. The restoring force on the air flow measuring device is actuated by fuel, supplied by a fuel pump via a damping throttle, which operates within a pressure chamber into which the control slide protrudes by means of an end face. A check valve is arranged in a discharge line between the pressure chamber and the delivery side or the suction side of the pump, and opens above a predetermined pressure within the pressure chamber. This allows a rapid unloading of the pressure chamber and a rapid response of the fuel injection system in the case of an acceleration.

Abstract: A fuel injection system which serves to supply fuel to a mixture-compressing, externally ignited internal combustion engine which includes an air flow rate member for actuating a metering and distribution valve, a flushing valve is disposed in an outlet line leading from each injection valve to a return flow line open when the engine is turned off and immediately after actuation of the ignition switch of the engine, enables a return flow via the outlet lines of the fuel flowing through the fuel supply line and the metering and distribution valve assembly to the injection valves until an electromagnetic valve drivable by a time control element opens a pressure line to a pressure chamber of the flushing valve, and the pressure prevailing in the pressure chamber opens a diaphragm connected to the movable valve parts of the flushing valve in such a manner that the flushing valve closes.

Abstract: A fuel flow rate measuring device comprising a control rod axially movable in proportion to the rate of flow of air flowing through a suction pipe, a ball disposed in a taper bore and adapted to be moved in the taper bore by the control rod, the taper bore and the ball cooperating with each other to define a clearance which is variable in proportion to the rate of flow of the air, and a pressure regulator provided between a fluid inlet and outlet for keeping constant the fluid pressure difference across the clearance defined by the taper bore and ball.

Abstract: A fuel supplying device for use in fuel injection type internal combustion engine. The device has a fuel metering device operatively connected to an air valve device disposed in the air horn upstream of a throttle valve, fuel supplying means adapted to supply the fuel at a constant supplying pressure to the fuel metering device, a constant differential pressure valve arranged to maintain a predetermined differential pressure across the fuel metering device, and an injector for discharging the metered fuel into the air horn in the vicinity of the throttle valve. The constant differential pressure valve includes a diaphragm type valve arranged to sense and amplify differential pressure across the fuel metering device, and a variable orifice type flow control device arranged to charge flow resistance of the metered fuel.

Abstract: An engine charge forming device controls the fuel metering orifice area in proportion to the throttled air flow area of the induction passage and controls the pressure drop across the fuel metering orifice in proportion to a vacuum signal which is substantially independent of the compressibility effects of throttled air flow; fuel flow is thereby proportioned to air flow throughout the range of engine operating conditions. Adjustments are provided for varying the fuel metering orifice area to set minimum and maximum fuel flows, and controls are provided for modifying the vacuum signal to vary air-fuel ratio.

Abstract: A pressure control valve for a fuel injection system is proposed which serves to control the warm-up fuel quantity for a mixture-compressing, externally ignited internal combustion engine. The pressure control valve includes a movable valve part which is urged in the closing direction by a compression spring which is counteracted during the warm-up phase by a first temperature-dependent element, whose force on the compression spring below a predetermined temperature in the direction of an increase in the force of the first temperature-dependent element can be influenced by a second temperature-dependent element, so that the fuel-air mixture during the warm-up phase can be adapted to the requirements of every internal combustion engine.

Abstract: A fuel delivery apparatus is proposed for mixture-compressing, externally ignited internal combustion engines, which serves to meter a fuel quantity adapted to the quantity of air induced and to regulate the fuel-air mixture in accordance with operational characteristics of the internal combustion engine. The fuel delivery apparatus comprises a fuel metering system actuated by an air measuring element arranged in the air induction line of the internal combustion engine, while the air measuring element has a control body which controls the size of the air induction tube cross-sectional area, a radial vane which is pivotably fixed in a work chamber, and a damping vane fixed in a damping chamber.

Abstract: A fuel-air mixture arrangement with an air-compressing supercharger for a combustion engine with continuous fuel injection into the intake pipe which holds an air quantity meter, a pivotal ram flap and a throttle flap are arranged behind each other. The air quantity meter, depending on its deflection, actuates a fuel metering unit. The fuel metering proceeds at constant pressure drop in the fuel. This pressure drop can be varied depending on certain coefficients, and the pressure drop on a valve is varied by a control pressure valve to which controlling variables are applied. The set pressure drop at the metering cross sections of the fuel metering units is kept constant by the valve operated by the control pressure valve. The air quantity meter is located downstream of the air compressing supercharger and the control pressure valve receives the supercharger air pressure prevailing upstream of the throttle flap via a diaphragm unit.

Abstract: A fuel injection system for controlling a mixture-compressing, externally ignited internal combustion engine which includes a fuel apportionment valve controllable by means of an air flow rate meter, with the fuel pressure upstream of the apportionment point being variable by means of a pressure regulating valve having a movable valve member which separates two chambers connected by a throttle point, and wherein the fuel pressure upstream of the fuel apportionment valve is exerted on one side of the movable valve member, and the force of a spring and a control pressure, which is variable by means of a control element in accordance with operating characteristics of the internal combustion engine, are exerted on the other side of the movable valve member to thereby intervene easily in order to vary the fuel-air mixture using small control forces.

Abstract: A fuel injection system for an internal combustion engine includes an air suction pipe, a throttle valve located in the pipe, and a member, upstream of the throttle valve, which is actuatable by air flowing through the suction pipe so as to move a piston valve to dose a quantity of fuel to a fuel injection nozzle. The system includes a duct which bypasses the throttle valve, the duct having a valve which closes the duct when the throttle valve is closed and when the engine is above the idling speed. Dosing of fuel is thereby stopped during coasting of a vehicle, leading to decreased fuel consumption.

Abstract: Constant differential pressure valves, one for each cylinder of the engine, supply liquid fuel to the injection nozzles. The liquid fuel supplied to the valves is delivered from a chamber within a metering member mounted to turn within the bore of a stationary sleeve. A plate carried by the metering member has notches on its periphery which cooperate with openings in the enclosing sleeve to form variable orifices. The metering member is turned in proportion to the rate of air flow through an air intake passage for the engine.