Abstract: A fuel injection pump of the type wherein the fuel injection timing is controlled by a timer and a solenoid-operated timing control valve. The timer has a high-pressure chamber and a low-pressure chamber which are defined at both sides, respectively, of a timer piston. The high-pressure chamber communicates with a high-pressure groove formed in the timing control valve through a passage. The low-pressure chamber communicates with the suction side of a feed pump through a low-pressure passage and also communicates with a low-pressure hole formed in the timing control valve through a passage. The timer piston is not provided with a passage mechanism which provides communication between a pump chamber and the high-pressure chamber. The pump chamber communicates directly with the high-pressure groove in the timing control valve through a fixed orifice disposed in the wall of the pump housing and a passage leading to the orifice.

Abstract: A unit injector comprising a plunger, a high pressure fuel chamber defined by the tip face of plunger, and a fuel supply port open to the high pressure fuel chamber when the plunger is at the fuel compressing operation start position. A variable volume chamber filled with fuel is provided, and the volume of the variable volume chamber is controlled by a piezoelectric element. A spill valve is also provided for spilling out the fuel in the high pressure fuel chamber to stop the fuel injection, and is controlled by the fuel pressure in the variable volume chamber. A fuel charging port connected to the variable volume chamber is open to the plunger bore at a position remote from the tip face of the plunger on a side opposite to the high pressure fuel chamber, and the variable volume chamber is charged with fuel via the fuel charging port.

Abstract: A fuel injection pump comprising a pump piston comprising a pump working space communicating with a fuel supply space and an injection nozzle of an internal combustion engine to be filled with fuel during a pump piston intake stroke and to provide for flow of delivery fuel to the injection nozzle during a pump piston delivery stroke, a first pilot valve for controlling a quantity of fuel delivered to the injection nozzle and an arrangement for dividing the delivered quantity into preliminary and main quantities, the dividing arrangement comprising an assembly for venting a portion of fuel from the pump working chamber during the pump piston delivery stroke and a second pilot valve for controlling an amount of fuel vented from the pump working chamber.

Abstract: A fuel injection device for internal combustion engines including a pump nozzle, a pump piston, preferably driven via a drive cam, and a pressure chamber disconnected from a pump chamber by an intermediate piston that preferably assumes its end postions in its working stroke, with a pressure line leading from the pressure chamber to an injection nozzle. The control of fuel quantity into the pressure chamber is effected via a control valve, preferably embodied as a magnetic valve, in a feed line that is also controlled by a control slide driven in synchronism with the pump piston. During one intake stroke segment of the pump piston, the feed line is connected to the pressure chamber; during another intake stroke segment, the feed pump is connected to a reservoir, so as to control the fill volume of the reservoir as a function of time.

Abstract: The invention relates to a handheld portable tool driven by a two-stroke engine equipped with a pneumatically actuated injection pump. Injection pumps for two-stroke engines are generally rigidly connected to the engine so that the injection line can be rigid and as short as possible. This, however, leads to operational disturbances in the injection pump. To eliminate these disturbances, the injection pump is mounted in a thermally insulated handle housing portion of the tool which is damped with respect to the vibrations of the engine and is connected to the latter via flexible connecting lines.

Abstract: A vehicle fuel pumping unit wherein a reserve fuel supply container is located within the fuel tank to supply liquid fuel to a motor-operated pump when the tank is nearly empty. The invention addresses the problem of pump starvation when the tank is nearly empty and the liquid fuel is held away from the pump intake passage due to abrupt sustained turning or other maneuvers of the vehicle. In preferred practice of the invention normal fuel flow from the tank to the pump is controlled by an annular float valve located directly below the reserve fuel supply container; fuel flow from the reserve container is controlled by a pressure-responsive valve located in the section path between the container and the pump intake, said pressure-responsive valve being part of a sub-assembly including a liquid fuel filter screen for filtering all fuel from the container and a valve seat for the pressure-responsive valve.

Abstract: A fuel injection pump for an internal combustion engine comprising a cylinder defining a pump working space, a plunger displaceable in the cylinder, and a bypass valve for bypassing fuel from the pump working space; and a method of controlling flow of fuel from the fuel injection pump to the internal combustion engine by controling the time interval between opening and closing of the bypass valve in accordance with load parameters of the internal combustion engine.

Abstract: A servocylinder unit for adjusting an amount of fuel fed to a vehicle drive engine and comprising a piston displaceable in a cylinder, a first pre-stressed spring for biasing the piston to its initial position, a first stop for supporting the first spring and displaceable along the longitudinal axis of the cylinder, a second pre-stressed spring extending between the first stop and a base of the cylinder, and a second stop fixed to the cylinder and engageable by the first stop under bias of the second spring. The first spring enables regulation of a number of revolutions of the vehicle engine, and the second spring, which has a larger pre-stress than the first spring and is less rigid than the first spring, is compressible to enable switching off of fuel feeding.

Abstract: An arrangement for supplying fuel from a supply tank to an internal combustion engine of a power vehicle comprises a supply aggregate arranged to be located in a supply tank and a supply pump provided with a suction opening, a suction chamber having a first opening communicating with an interior of the tank and a second opening, a storage chamber supplied from fuel return conduit extending from the internal combustion engine and communicating with the suction chamber through the second opening, a blocking member arranged in the suction chamber and forming a valve with a limiting structure of the second opening, the valve closing the second opening until the suction opening formed in the suction chamber is immersed in fuel which flows from the tank into the suction chamber, the blocking member being arranged in a fuel suction stream and held from the latter on an abutment facing toward the suction chamber, whereby it releases the first opening, the blocking member in the event of an interruption in the fuel su

Abstract: A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine. The assembly includes an elongated conduit having a fuel passage therein and a plurality of sockets for making fluid communication between the conduit and the injectors. The socket comprises a metallic sheath adapted to be inserted into a socket positioning hole in the conduit and a plastic insert positioned within the metallic sheath. The metallic sheath and the plastic insert are combined by a mechanically shrinked edge of the sheath or an adhesive agent. The plastic insert may be nickel plated.

Abstract: The fuel injection device for injection carburetors is provided with a single fuel control unit for injecting a fuel into a suction tube in quantities corresponding to flow rates of air to be drawn into the suction tube, a slow negative pressure passage communicating with a depression chamber of the fuel control unit, a diaphragm valve for opening a main negative pressure passage to communicate the depression chamber with the main negative pressure passage when the air suction rate exceeds a predetermined value, and another diaphragm valve operable to close a slow jet and open a main jet when the air suction rate exceeds the predetermined value. This fuel injection device is simple in the structure thereof, manufacturable at a low cost and has high fuel control accuracy.

Abstract: A fuel control is provided having a metering means for metering a weight flow of fuel, a control for controlling the metering means, a valve for determining a change in fluid pressure of the weight flow of fuel downstream of the metering means, the valve having; a pressure reaction surface disposed in the weight flow downstream of the metering means, the surface controlling an area of a window passing the weight flow of fuel therethrough, a spring attaching to the pressure reaction surface for balancing the change in fluid pressure of the weight flow of fuel against the pressure reaction surface, and a position sensor for continuously determining a position of the pressure reaction surface and continuously sending a signal of the position to the control means, wherein the control means determines the weight flow of fuel through the valve means according to the equation: ##EQU1## whereby K is a constant, F(X) is equal to an area of the window as a function of X, X is equal to a position of the reaction surface

Abstract: An electronically controlled fuel supply system is provided for employing a plurality of fuel injectors which maximize SAC pressures under both low speed and high speed operating conditions and are capable of sustaining SAC pressures in excess of 30,000 psi. The fuel supply system of the present invention includes a gear pump which supplies pressure-modulated fuel to a fueling channel and to a timing channel and from there to a plurality of injectors. Fuel pressure regulator means and timing fluid pressure regulator means are provided in the fueling and timing channel, respectively. An electronic control unit receives information relating to engine operating conditions from a plurality of sensors and actuates the fuel pressure regulator means and the timing fluid pressure regulator means to adjust the pressure as required for the specific engine operating conditions.

Abstract: This invention relates generally to fuel control systems for combustion engines such as gas turbines used in helicopters and the like, and more specifically relates to a fuel control transfer system which permits the substitution of one fuel control device for another which is supplying fuel to an operating combustion engine, without interruption of, or adverse effect on continued operation of the engine.

Abstract: A governor for injection pumps of diesel internal combustion engines in which the injection amount is controlled by the boost pressure. The governor is mounted directly on the crank casing of the internal combustion engine together with an electromagnet which is energized at startup. The governor and the electromagnet transmit thrust and motion to the control rod of the injection pump through the same lever system. The electromagnet is switched in such a way that it overrides the governor during the engine starting process. The lever system is constructed to produce a nonlinear transmission of the movement of the membrane to the control rod.

Abstract: A fuel, lubricant supply system for a carburetor of a two-cycle internal combustion engine wherein both fuel and lubricant are delivered to the fuel bowl of the carburetor. The amount of lubricant delivered is proportioned in response to the air flow through the carburetor and the amount of fuel delivered is controlled in response to the output pressure if the lubricant pump for preventing the operation of the engine with insufficient lubricant. In one embodiment, the air flow is sensed by sensing static pressure at the throat of the venturi of the carburetor and in the other embodiment, the air flow is sensing dynamic air pressure at the inlet to the carburetor.

Abstract: An assembly for a fuel injection system for use with an internal combustion engine, comprises a fuel injection system component and a plurality of injectors mounted on the component. The component comprises a plurality of air passages for supplying air into the engine, a plurality of injector seats and a fuel passage communicating with the injector seats. Each injector has a vapor discharge passage communicating with the inside of the injector and with the fuel passage, and/or has a filter inserted in the fuel passage so that fuel vapor in the injector is smoothly discharged from the injector into the fuel passage, thereby preventing vapor lock of the injector system. The component may be directly mounted to a surge tank so that an independent intake manifold need not be used.

Abstract: A fuel injection control device comprising a fuel injector driven by a piezoelectric element. The piezoelectric element is charged with a electrons by using an LC resonant circuit, and the electrons charged in the piezoelectric element are discharged by using an LC resonant circuit. The piezoelectric element is driven before the regular injection is begun.

Abstract: In a fuel delivery system that includes a pump for supplying fuel under pressure from a supply to an internal combustion engine, 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 pressure from the pump. The coil spring is captured in compression between the valve element and a guide positioned downstream of the valve element within the flow passage. A stem that extends axially from the valve element is slidably disposed in a central bore in the guide. An orifice couples the bore to the fluid flow passage. The guide and valve stem thereby not only restrain lateral motion of the valve element within the passage, but also form a piston/cylinder construction that cooperates with the orifice to dampen axial motion of the valve element.

Abstract: A device for detecting a malfunction of a fuel evaporative purge system comprises a temperature sensor for detecting a temperature inside a canister. During the absorbing and purging operations of the purge system, the device calculates changes in the temperature when absorbing and purging and compares the temperature changes with predetermined values denoting that the purge system is operating normally, and determines whether a malfunction has occurred in the purge system from the result of the comparison.