Abstract: An emergency ignition system for motor vehicles comprises a high-voltage coil having an input circuit connectible to the vehicle battery and an output circuit connectible to the vehicle distributor for applying high-voltage pulses. The input circuit includes an oscillator generating periodic pulses, and a switch controlled by the oscillator for periodically interrupting the input circuit to the coil and thereby causing the coil to generate high-voltage pulses to be applied to the vehicle distributor. The input circuit further includes a control circuit connectible to the vehicle battery and comprising a voltage-drop sensor for sensing a predetermined voltage drop at the output of the vehicle battery caused by the load thereon when starting the engine, and for producing an enabling signal in response to the predetermined voltage drop to enable the oscillator to output pulses to the switch for periodically interrupting the input circuit to the coil.

Abstract: A fuel delivery system for automotive engine and like applications comprises a canister for positioning within a fuel tank so as to be surrounded by fuel in the tank. An electric-motor fuel pump has an inlet and an outlet for feeding fuel under pressure from the tank to the engine. Excess fuel is returned from the engine to the canister. A fuel level sensor includes a pressure sensor positioned at a lower portion of the canister and responsive to head pressure within the canister and within the surrounding tank for providing an electrical signal as a function of a difference between such pressures. An indicator is responsive to such electrical signal for displaying tank fuel level to an operator.

Abstract: A fuel-injection pump for diesel-engine injection system, comprising at least one cylinder-piston unit with an associated intake valve for the introduction of fuel delivered by an electrical supply pump, and a delivery duct. Electronic means are provided for modulating the electrical supply pump to vary the pressure of the fuel taken in by the cylinder-piston unit and consequently the bottom dead center position of the piston and hence the length of its pumping stroke.

Abstract: A fuel delivery system for internal combustion engines in which an electric-motor fuel pump supplies fuel under pressure from a tank to a fuel injector carried by the engine, and excess fuel is returned by a pressure regulator from the engine to the supply tank. A restriction is positioned in the fuel return line to restrict flow of return fuel therethrough, and thereby create a back-pressure of fuel in the return line. A pressure sensor is coupled to the return line between the pressure regulator and the restriction and drives the fuel pump as an inverse function of fuel pressure in the return line, and thus as a direct function of fuel demand at the engine.

Abstract: A fuel injector for an internal combustion engine which includes a housing having a flange for mounting the fuel injector to a cylinder head, a pump jet and at least one electrical component internal of the housing, a pair of electrical connector leads for the electrical component, an aperture extending through the flange, and a portion of the electrical connector leads extending from internally of the housing and terminating in the aperture, thereby permitting the pair of electrical connector leads to be connected with another pair of electrical connector leads in the aperture. The ends of the electrical connector leads are preferably provided with electrical connecting elements secured in the aperture and the other pair of electrical connector leads may be provided in the form of an extension or plug adapted to engage the electrical connecting elements in the aperture.

Abstract: For supplying fuel from a fuel tank to an internal combustion engine by a fuel supply pump, a fuel delivery pressure of the fuel supply pump is regulated by a pressure regulating valve so as to maintain the difference between the fuel delivery pressure of the pump and an inner pressure of an intake manifold of the engine at a prescribed constant value, and the delivery volume of fuel from the pump is controlled in response to the fuel delivery pressure so as to minimize the amount of surplus fuel produced by the pressure regulating operation of the pressure regulating valve.

Abstract: A fuel pump driving apparatus for a vehicle, comprising a fuel pump, a blocking oscillator, including a transistor and a bias circuit therefor, for driving the fuel pump, and a control circuit for controlling an oscillating operation of the blocking oscillator. The control circuit drives the blocking oscillator upon reception of an ignition pulse generated from an ignition coil in accordance with rotation of an engine. The control circuit is constituted by a silicon controlled rectifier whose input side is series-connected to a bias circuit of the blocking oscillator, and circuit means, connected to the gate of the silicon controlled rectifier and including a Zener diode, for voltage-dividing the ignition pulse. The bias circuit for the transistor of the blocking oscillator is designed to set a current which is flowed therethrough when the transistor is OFF to be lower than a holding current of the silicon controlled rectifier.

Abstract: A high-pressure, continuous-delivery piston pump, controlled as a function of engine speed and load, supplies fuel to an accumulator supplying injectors. On the intake side of the pump, there is provided a throttle for metering the amount of fuel supplied by the pump. Via operating signals, the throttle is regulated by an electronic control device in such a manner as to supply the pump and pressurize only the amount of fuel strictly required for operating the injectors and the engine, thus eliminating any energy losses caused by fuel feedback to the tank, and drastically reducing fuel consumption.

Abstract: An end cap for a fuel pump provides suppression of radio frequency noise generated by the motor of the pump. The end cap includes radio frequency suppression circuitry disposed therewithin and is configured so as to be a direct replacement for conventionally utilized end caps.

Abstract: In a fuel pump driving apparatus for a vehicle engine including a fuel injection system, the selection of a plurality of energizing circuits each formed by the combination of two or all of three brushes of a fuel pump drive motor is effected in accordance with the load conditions of the engine, thereby changing the rotational speed of the motor and hence the fuel quantity delivered from the fuel pump. When the occurrence of a fault in one of the energizing circuits is detected, the driver is informed of the occurrence of the fault and in addition a faulty-condition controller controls switching means in such a manner that the drive motor is energized through another one of the energizing circuits.

Abstract: A fuel supply system for an auxiliary vehicle heating device to which fuel can be supplied via the fuel supply system of an internal combustion engine. A fuel storage reservoir is provided which supplies fuel to an auxiliary vehicle device, and is arranged in the engine compartment of the vehicle. The storage reservoir is filled with fuel in a batchwise manner from any vehicle-contained fuel supply source, preferably via an elongated slot opening into a fuel receiving space of the reservoir from a fuel line that is in bypassing relationship to the reservoir. The fuel storage reservoir has a ventilating value leading to the atmosphere. In accordance with one aspect of the inventive concept, the fuel storage reservoir can receive a fuel pump which forwards the fuel from the fuel storage reservoir to the auxiliary heating device, so that the pump and reservoir form a single-part unit.

Abstract: A vehicle fuel pump control apparatus controls the operating speed of a fuel pump to adjust the quantity of fuel forced to at least one fuel injector. When the required fuel quantity of the engine which is based on its operating condition is determined to be greater than a reference level predetermined in correspondence to the operating condition, the pump operating speed is increased, whereas the pump operating speed is decreased when the required fuel quantity is determined smaller than the reference level. When an insufficient fuel supply is detected during the low speed operation, the reference level is updated or readjusted to a lower level in such a manner that the required fuel quantity is determined greater than the corrected level.

Abstract: In a dc electric fuel pump control apparatus for controlling the quantity of fuel supplied to a vehicle engine in accordance with an engine operating parameter condition such as an intake air flow condition or engine speed condition, when controlling a voltage applied to a fuel pump operating motor by closing or opening a fixed-resistor short-circuiting switch circuit in accordance with the magnitude of the operating parameter relative to a predetermined value, an increase or decrease of a battery power source voltage from a predetermined value is detected to increase or decrease the predetermined value of the engine operating parameter. Where a variable resistor is used in place of the fixed resistor, its resistance value in a low battery power source voltage condition is controlled lower than that in a high battery power source voltage condition.

Abstract: A fuel system for an internal combustion engine wherein the fuel pressure is maintained within a desired predetermined range. An electric fuel pump supplies fuel at a pressure proportional to the electric power applied to the pump. Control circuitry compares a voltage signal corresponding to the fuel pressure within a predetermined voltage range corresponding to a predetermined fuel pressure range. When the voltage signal is below the predetermined voltage range, the electric power applied to the electric pump is increased; when the voltage signal is above the predetermined voltage range, the electric power applied to the electric pump is decreased. The control circuit may further increase or decrease the electric power at a predetermined rate.

Abstract: A method and a device for supplying fuel and air to an internal combustion engine 1, in the case of which fuel is supplied to at least one injection valve 2 and combustion air is supplied to at least one intake pipe 3 provided with a throttle 4. For the purpose of achieving a simple and reliable mode of operation and for the purpose of guaranteeing a reliable supply of fuel and air to the internal combustion engine 1 under all operating conditions, the intake pipe 3 has coercively supplied thereto a predetermined amount of air corresponding to the respective position of the throttle 4 and, simulatenously, the injection valve 2 has coercively supplied thereto an amount of fuel in a fixed predetermined ratio to the amount of air.

Abstract: A fuel injection system for dosing and atomizing fuel under high pressure into the cylinders of an internal combustion engine has a continuously operating, controllable-flow-rate fuel pump and at least one adjusting drive associated with injection nozzles respectively for each cylinder of the engine. The flow rate of the fuel pump is controlled by the sum of the fuel quantities to be fed per unit time to all of the injection nozzles for controlling the fuel dose injected into each cylinder. The adjusting drive at least opens a fuel path to the injection nozzle for each cylinder at the correct time to control the injection timing. Separating the dose and timing controls in this way simplifies the structure required for both controls.

Abstract: A fuel injection system according to the present invention comprises a fuel injection nozzle for injecting a supplementary fuel prior to injection of a main fuel, a distributor-type fuel injection pump for supplying the main fuel to the nozzle, a supplementary fuel feed pump for delivering the supplementary fuel to the nozzle, a relief valve for adjusting the pressure of the fuel from the feed pump to a fixed level, and a supplementary fuel feed valve disposed between the relief valve and the nozzle. The open period of the feed valve is controlled in accordance with the operating state of the engine.

Abstract: An intake air control device for an internal combustion engine having a battery, an electrically operated fuel pump, a fuel injector, an intake air flow control means operative in response to the running condition of the engine, and an operating means for operating the air flow control means. The device further comprises a detecting means for detecting the voltage of the battery, and a control means for controlling the operating means for the intake air flow control means such that the amount of the intake air is decreased when the detected voltage is lower than a predetermined value.

Abstract: A submersible fuel pump and fuel sender assembly for a vehicular fuel supply system, supported within an opening in a fuel tank and located inside the tank by a plastic bumper seated in a recess in a tank wall.

Abstract: Improved method and apparatus for injecting fuel for a diesel engine are disclosed which are constructed such that a push rod is disposed in a nozzle body and fuel is injected into a combustion chamber by actuating the push rod. The improvement of the invention consists in that push rod actuating force is accumulated for a certain period of time while the push rod is stationarily held by means of an electromagnetic coil which is energized. Fuel injection is thus carried out by releasing the accumulated force by way of deenergization of the electro-magnetic coil. In an embodiment of the invention push rod actuating force is extracted from a cam driving mechanism and a coil spring disposed between the cam driving mechanism and the push rod serves as a push rod actuating force accumulating means.

Abstract: A fuel injection system has an electronic module mounted directly on a fuel body portion of the fuel injection system for cooling by fuel flow through the fuel body. The electronic module energizes a fuel pump to circulate fuel through the fuel body, even when the engine is not operating, if the temperature within the module exceeds a selected level.

Abstract: A fuel injection system for a multi-cylinder aircraft engine in which, in order to secure the fuel supply, a pressure-measuring device is connected to the feed line leading from the fuel tank to the fuel quantity distributor, into which are installed two parallel fuel pumps and a fuel filter; this pressure-measuring device in case of a predetermined pressure drop switches on the fuel pump which previously was not in operation; in case of an excessive pressure difference at the fuel filter which is measured by pressure-measuring device upstream and downstream of the filter, an electromagnetic valve installed into a bypass line to the fuel filter is opened; the soiling degree of the fuel filter is indicated by a hydraulically actuated difference pressure-measuring device with pressure limitation.

Abstract: A circuit for automatically controlling an internal combustion engine's electromagnetic fuel injection pump during the following three modes of operation: normal, low cranking and stall.

Abstract: A fuel control device for a diesel engine injection system having a motor-driven pump for supplying fuel to the injectors of said engine by driving a fuel pump with a DC motor, means for outputting a first motor-driven pump speed instruction signal according to a throttle position and an engine speed, a function generator for outputting a motor-driven pump armature current setting signal according to an engine speed along a torque curve preset for said engine, a motor speed detecting circuit for detecting an armature current of said motor-driven pump, to output an armature current signal, an integrator for integrating a difference between said armature current setting signal and an actual armature current signal, to output a second motor-driven pump speed instruction signal, and a minimum signal priority circuit for outputting a smaller one of said first and second instruction signals in priority, to control the armature current, whereby the speed of said motor-driven pump is regulated according to an engine

Abstract: A fuel system for an internal combustion engine includes a pump/injector having an actuating winding to which power is supplied by a first electronic means. A first control signal is supplied by a second electronic means to energize the winding and a second control signal is supplied by a third electronic means to de-energize the winding. The third electronic means calculates the time at which the winding should be de-energized to allow the piston in the pump to draw in the required volume of fuel, the second electronic means causing delivery of fuel when the required volume of fuel has been drawn into the pumping chamber of the pump.

Abstract: A fuel pumping apparatus for supplying fuel to an injection nozzle of an internal combustion engine comprises a pumping plunger housed in a bore and a piston connected to the plunger. Valve means constituted by a pair of sleeves is provided to control the application of fuel under pressure to the one or other side of the piston. The sleeve is movable and is connected to the output member of an electrically controlled actuating means. A spring is interposed between the piston and the output member so that during the return movement of the piston and plunger following delivery of fuel an increasing force will be applied by the spring to the output member to move the output member and sleeve in a direction to cut off the application of pressure to the piston. The final position of the piston and plunger will therefore depend on the force exerted by the actuating means which is a function of the magnitude of the electric current flowing therein.

Abstract: A fuel pumping apparatus comprises a housing which defines a boss portion. The boss is hollow and accommodates a pump barrel which is retained in position by means of a sleeve engaging a flange on the barrel. The sleeve is trapped between the flange of the barrel and a flange on a nozzle assembly and the latter is retained by a cap nut which is in screw thread engagement with the boss portion.

Abstract: An electronic controller for an internal combustion engine provides a ratio control signal corresponding to a respective air/fuel ratio, and responds to an air flow signal, a fuel flow signal and the ratio control signal to control fuel flow as to make the ratio of air flow to fuel flow substantially equal to said respective air/fuel ratio. The ratio control signal is developed from a base run ratio control signal as modified in response to various parameters such as engine temperature, manifold pressure, idle, manifold vacuum, fuel temperature, wide open throttle, engine speed, and start. The controller also provides a speed-up circuit for promptly responding to change in air flow and dynamic braking for the fuel metering pump. The pump speed circuit includes a range extender.

Abstract: A method and an apparatus for operating a fuel supply system, in particular a fuel injection system, in which a fuel supply pump continuously supplies fuel and wherein the excess fuel not required for injection is returned to the fuel reservoir. In order to reduce the average operating power of the pump and thus reduce the average amount of fuel returned to the tank, thereby reducing undesirable temperature increases of the fuel in the reservoir, the system fuel pressure is monitored and maintained at a value substantially equal to a reference value. The electrical power of the fuel supply pump is altered continuously so as to maintain the fuel system pressure at the reference level.

Abstract: An improved method and apparatus is provided to control the rate at which fuel is supplied to an engine by a fuel pump. The fuel pump has an output pressure which varies with pump operating speed in accordance with different curves of a series of curves. In order to determine which curve of the series of curves is representative of the manner in which the fuel pump output varies with pump speed at one time, the fuel pump operating speed and output pressure are simultaneously sensed to determine a point on an initial curve. The fuel pump operating speed is subsequently varied in accordance with the initial curve to provide a desired variation in fuel pump output to the engine. The fuel pump operating speed and output pressure are periodically simultaneously sensed to determine if the fuel pump output still varies in accordance with the initial curve or has changed to a second curve of the series of curves.

Abstract: Diesel fuel injection system in which a standing high-pressure wave is maintained in the common rail and which utilizes injectors which function as gates or valves. Electronic controls sensitive to engine demands based on speed and load electronically control the injectors to vary both moment and duration of fuel injection time. Input signals, as determined by engine speed by way of the distributor, vary the injection timing according to an advance curve at the distributor correlated to piston position. Duration of the injection cycle (quantity of fuel injected) is controlled electronically and variably in relation to throttle position.

Abstract: A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably shifted to vary the stroke.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.