Abstract: A two-stage turbocharger system for an internal combustion engine is disclosed. The turbocharger system includes a high pressure turbine coupled to an exhaust manifold of the internal combustion engine, and a low pressure turbine having an inlet coupled to the high pressure turbine and an outlet coupled to an exhaust system of the engine. The turbocharger further includes a low pressure compressor having an inlet coupled to environment and an outlet coupled to a high pressure compressor. The high pressure compressor is coupled to an intake manifold of the internal combustion engine. The high pressure turbine is provided with a high pressure by-pass line having a high pressure controlled by-pass valve. The low pressure turbine is provided with a low pressure by-pass line having a low pressure controlled by-pass valve. A controlled valve is provided between the high pressure turbine and the low pressure turbine.

Abstract: A fuel supply unit (1) is provided e.g. a carburetor or a low pressure injection system of an internal combustion engine. The fuel supply unit (1) includes a main air passage (3), which has a throttle valve (8, 9) mounted therein and the throttle valve (8, 9) includes a throttle shaft (8) extending between two to one another opposite located shaft sides (6, 7). A control module (2) for the fuel supply (2) is mounted to one (7) of the shaft sides (6, 7), which control module (2) includes throttle position detecting means (30; 300) for monitoring the position of the throttle valve (8, 9), and fuel valve means (60) for controlling the fuel supply to the main air passage (3). Also, an ignition system is provided which is able to control the ignition timing with respect to status of the at least one of the means (30; 300, 40, 60, 100) in the control module (2) in order to at least control the idle speed of the engine.

Abstract: A liquefied petroleum gas (LPG) fuel assembly may include a fuel rail and a flow control mechanism. The fuel rail may have an inlet in communication with a pressurized LPG fuel source, an injection passageway in communication with the inlet and a fuel injector that provides fuel to a combustion chamber of an engine, and an outlet in communication with the fuel injection passageway. The flow control mechanism may be in communication with the outlet of the fuel rail and a LPG fuel tank and may be operable in first and second modes. The second mode may provide a greater flow restriction than the first mode to control a fuel flow from the outlet of the fuel rail to the fuel tank.

Abstract: A hybrid powertrain and a method of controlling a throttle in an engine of the hybrid powertrain are provided. A throttle system has a throttle at an optimal position for the engine to power a first motor/generator when an electric throttle motor is de-energized to minimize current consumption by the throttle motor. The electric throttle motor is energizable to adjust the position of the throttle. A biasing member biases the throttle to a default position when the electric throttle motor is not energized. The hybrid powertrain has a first motor/generator operatively connected to the engine, and a second motor/generator operatively connected to the generator and operable for providing output power. The engine is operable in a predetermined optimal state to provide power to the generator for powering the first motor/generator. The throttle is at a predetermined position when the engine is in the predetermined optimal state.

Abstract: A device is provided for preventing the engine from stalling in a vehicle equipped with a diesel injection system, particularly a common-rail injection system. The device comprises a volume flow control valve, a high-pressure fuel pump, a pressure control valve, one or more injectors and a control unit. The control unit carries out a pressure control by controlling the volume pressure control valve in the idle state of the engine in a first operating mode, monitors whether a working point is present at which a release of air from the fuel is carried out and, in the event such a working point is detected, initiates a second operating mode in which a pressure control is carried out by controlling the pressure control valve.

Abstract: A liquefied petroleum gas (LPG) fuel assembly may include a fuel rail and a flow control mechanism. The fuel rail may have an inlet in communication with a pressurized LPG fuel source, an injection passageway in communication with the inlet and a fuel injector that provides fuel to a combustion chamber of an engine, and an outlet in communication with the fuel injection passageway. The flow control mechanism may be in communication with the outlet of the fuel rail and a LPG fuel tank and may be operable in first and second modes. The second mode may provide a greater flow restriction than the first mode to control a fuel flow from the outlet of the fuel rail to the fuel tank.

Abstract: A method for automatically controlling the pressure of a common rail system on an A side and a common rail system on a B side of a V-type internal combustion engine, in which the rail pressure (pCR(A)) of the common rail system on the A side is automatically controlled by an A-side closed-loop pressure control system, and the rail pressure (pCR(B)) of the common rail system on the B side is automatically controlled by a B-side closed-loop pressure control system. The automatic control of each side is independent of the other. A common set rail pressure is set as a reference input for both closed-loop pressure control systems. A set injection quantity is computed by a speed controller as a function of an actual speed relative to a set speed, and a common disturbance variable is computed as a function of the set injection quantity. Both the correcting variable of the A-side pressure controller and the correcting variable of the B-side pressure controller are corrected by the common disturbance variable.

Abstract: In an intake control system for a general-purpose engine, comprising: a motor which is attached to a first side wall, supporting one end portion of a valve shaft of a throttle valve, of a throttle body, and which drives the throttle valve to be opened and closed; a sensor unit which is attached to a second side wall supporting the other end portion of the valve shaft, and which detects an opening degree of the throttle valve; a fuel injection valve which is attached to a third side wall integrally connecting upper end portions of the first and second side walls to each other, and through which a fuel is injected into the intake path at a position downstream of the throttle valve; and an electronic control unit which is attached to a fourth side wall facing the third side wall, the electronic control unit is connected to the motor, the fuel injection valve and the sensor unit with first, second and third conducting wires, respectively.

Abstract: A speed control system is for a vehicle having an engine including a carburetor with a throttle plate moveable between a minimum open position and a maximum open position. The speed control system includes a ground speed limiter mechanism operatively coupled with the throttle plate and configured to displace the plate toward the minimum position as ground speed of the vehicle approaches a predetermined maximum value. An engine speed limiter mechanism is operatively coupled with the throttle plate and is configured to displace the plate toward the minimum position as a speed of the engine approaches a predetermined maximum value. Preferably, a control linkage is connected with the throttle plate and is moveable between a first configuration, at which the throttle plate is disposed at the minimum position, and a second configuration at which the throttle plate is disposed at the maximum position, the two limiter mechanisms displacing the linkage.

Abstract: It is an object of the present invention to inhibit production of vapor within fuel when an engine is at a high temperature and to inhibit change of amount of the fuel injected from an injector. A fuel supply apparatus according to the present invention includes vapor production determining means (3) for determining whether or not the vapor of the fuel is producible, and control means (ECU) for operating a passage resistance adjusting means (47) of a pressure adjusting mechanism (40) to cause increase of the pressure of the fuel supplied to an injector (5) insomuch as the production of the vapor is inhibited when the vapor production determining means (3) has determined a vapor producible condition.

Abstract: A fuel injection control for an engine includes an improved construction that can hold an accurate atmospheric pressure data during and after starting of the engine. The engine includes an air intake passage. A throttle valve is moveably disposed within the air intake passage. A first sensor is arranged to sense an opening degree of the throttle valve. A fuel injector is arranged to spray fuel toward a combustion chamber of the engine. A control unit is configured to determine an amount of the fuel at least based upon an opening degree data sensed by the first sensor. A second sensor is primarily arranged to sense an intake pressure of the air flowing through the air intake passage. The second sensor is positioned downstream the throttle valve. The control unit adjusts a fuel amount based upon a reference data corresponding to an atmospheric pressure.

Abstract: In a flow amount control device which control flow amount of fuel to be supplied to a high pressure fuel pump, an opening, which communicates with a port for passing fuel to the high pressure fuel pump, is composed of a first rectangular opening, a second rectangular opening whose circumferential length is larger than that of the first opening, and a third trapezoidal opening bridging between the first and second openings. The port communicates with the first opening, when engine speed is low, and, as the engine speed increases, with the third and second openings. Accordingly, the flow amount of fuel to be discharged from the high pressure fuel pump varies non-linearly and a change of the flow amount thereof is small in engine low speed region.

Abstract: The invention relates to a quantity control valve for a fuel injection system, used in internal combustion engines, which includes a longitudinal slide that is movable in a valve housing between a first and a second control chamber and that allocates the fuel, flowing in from at least one low-pressure pump, to at least one high-pressure pump. For driving the longitudinal slide, the inflowing fuel is delivered into the first control chamber via a throttle or baffle valve, past the longitudinal slide. In the second control chamber, there is either a restoring spring that urges the longitudinal slide in the direction of its closing position, or the longitudinal slide there has an effective face-end surface area upstream of which a control line containing a throttle valve ends; this end face is smaller in surface area than the effective surface area of the face end in the first control chamber.

Abstract: A fuel distributor for delivering fuel under pressure to cylinders of an engine. The distributor includes a housing, an inlet for delivering fuel under pressure to the housing, a plurality of outlets in the housing and a valve assembly mounted in each outlet. Each valve assembly is for connection to a fuel injector mounted in a cylinder of the engine, and each assembly includes a passage for delivering fuel under pressure from the housing, a plunger positioned in the passage, and a valve spring biasing the plunger to one of a passage open position and a passage closed position. The fuel distributor also includes a cam for moving the plungers against the valve springs, whereby movement of the cam controls fuel flow to the cylinders.

Abstract: A control device for a filling-ratio adjusting pump with at least one displacement space works on the suction-throttle principle with a positive variation in volume of the displacement space or displacement spaces and is intended inter alia particularly for common-rail diesel injection systems. It allows an exact, precise and highly dynamic control of the filling-ratio adjusting pump at low outlay, without the system being impaired by undesirable cavitation. Located on the suction side of the pump is at least one throttling 2/2-way valve (21, 21a, 21b; 134; 51, 52, 53, 54; 81; 103) actuated by pressure difference. Either such a 2/2-way valve can be used for a group of displacement spaces or for the entire pump or a respective valve of this type can be inserted in front of each individual displacement space.

Abstract: A fuel management system for small internal combustion engines in which metered quantities of fuel are delivered by way of a variable volume, positive displacement pump to a fuel air mixing chamber in pulses timed with the rotation of the engine.

Abstract: A fuel delivery system for internal combustion engines that includes a source of fuel under pressure, fuel lines for feeding fuel to the individual cylinders of the engine, and a distributor for metering fuel under pressure from the source to the individual fuel lines. The fuel metering distributor includes a fuel cavity coupled to the fuel source for receiving fuel under pressure, apertures in the sidewall of the cavity coupled to associated individual fuel lines, and a piston slidably disposed in the cavity for opening the individual apertures to the cavity as a function of position of the piston within the cavity. A linear electromagnetic actuator is coupled to the piston for controlling position of the piston within the cavity as a function of engine operating conditions.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine has an injection pump supplied with fuel by a low pressure feed pump through an adjustable throttle. A fluid pressure operable piston is movable against the action of a spring to control the timing of delivery of fuel by the injection pump. Fuel under pressure is applied to the piston through a first fixed orifice from the feed pump. A second fixed orifice and a variable orifice are connected in series between a drain and the downstream side of the first fixed orifice. In parallel with the first fixed orifice is a constant pressure drop valve which maintains the pressure drops across the first fixed orifice substantially constant when the pressure drop has risen to a predetermined value.

Abstract: An air fuel control system for an internal combustion engine is disclosed. The control system includes an air pressure responsive device for modulating mechanically the flow of fuel into the engine in response to the pressure of air within the intake manifold. The pressure-responsive device includes first and second chambers, separated by a diaphragm being attached to a piston, with the first chamber which is connected to the intake manifold by an air line. The air fuel control system further includes a fuel metering device for controlling the flow of fuel into the air-fuel control in response to intake manifold air pressure including a barrel and plunger assembly with the barrel inlet port being specifically configured to accommodate both the no-air and transition-curve fuel rail pressures. The barrel profile is designed to meter fuel quickly and precisely in response to changes in manifold air pressure.

Abstract: Both a system for an method for feeding gasoline fuel into a gasoline internal combustion engine are disclosed herein. This system and method is suitable for use after an internal combustion engine has been started and warmed to normal operating temperature. The system incorporates a two-way valve to stop the flow of fuel to the standard carburetor and direct the flow of fuel to our system and method. Our system incorporates a multi-port valve which selects a predetermined amount of fuel and directs the fuel to the Positive Crankcase Ventilation (P.C.V.) vacuum line which is run thru hot exhaust gases. The fuel by means of P.C.V. vacuum line is fed directly into the intake manifold. The resulting fuel has been vaporized, it is fed into the intake manifold, and mixed with air for combustion. This results in a low pollutant emission and high efficiency. The air for combustion is still controlled by the standard carburetor air intake and control.

Abstract: A fuel injection pump for internal combustion engines having housing with a plurality of in-line pump elements including pump cylinders, surrounded by separate suction chambers and communicating with them by means of overflow openings, having two primary conduits disposed parallel to a camshaft for the inflow and outflow of fuel to and from the separate suction chambers and having defined connecting conduits between each separate suction chamber and each primary conduit by means of which the same quantity of fuel is metered to all the separate suction chambers under the influence of a pressure drop produced by the connecting conduits wherein an inflow connecting conduits has one fuel inflow throttle insert for the fuel inflow primary conduits the throttle insert being closed at one end and discharges with its open end into the separate suction chamber with its closed end protruding into the fuel inflow primary conduit the throttle insert having a defined throttle opening for conducting fuel from the primary c

Abstract: The fuel injection system for injection carburetors is provided with an air section of regulator and a fuel section of regulator which are arranged opposedly to each other on both the sides of a suction tube, and a connecting member equipped with a fuel injection valve for controlling fuel injection from the fuel section of regulator into the suction tube. The air section of regulator comprises a depression chamber and an air chamber which are separated from each other by a diaphragm, whereas the fuel section of regulator comprises a fuel chamber and a fuel injection chamber which are separated from each other by another diaphragm and communicated with each other through an orifice. The depression chamber is so adapted as to receive negative pressure from a venturi in the suction tube. The connecting member is connected between said two diaphragms and is urged so as to close the fuel injection port with the fuel injection valve.

Abstract: A fuel injection pump for internal combustion engines is described, which for controlling fuel quantity is provided with control unit that controls an electric final control element, which in turn actuates the regulating member that determines the fuel injection quantity per pump piston supply stroke. The supply of fuel to the pump work chamber is effected from a fuel supply chamber, which is kept at a controlled pressure by a fuel feed pump. To limit the maximum speed of the engine supplied by the fuel injection pump in the event of failure of the control unit, a valve is provided in the intake line of the fuel feed pump. Using this valve, the flow cross section of the intake line can be varied or closed. By means of the modification of the fuel pressure in the fuel supply chamber effected thereby, a control of the fuel injection quantity that is not dependent on the position of the quantity-determining member is attained.

Abstract: A fuel injection adapter for a vehicle having a carburetor includes a fuel chamber coupled to the fuel pump of the vehicle, an operating lever adapted for coupling to the throttle lever of the vehicle and a pair of nozzles positioned in the throat of the carburetor for delivering fuel directly thereto. The nozzles are connected to fuel metering jets mounted in a wall of the chamber and corresponding fuel control needles are movable in and out of the jets to control fuel flow by means of a needle plate that is driven from the operating lever. The adapter can be mounted directly to the carburetor. A heater is positioned in the chamber for heating the fuel for cold weather starting. A shutoff valve is connected in the inlet fuel line and stops fuel flow into the chamber when the operating lever is in a position corresponding to a throttle wide open condition.

Abstract: A device for metering pressurized fuel from a fuel pump and to an engine. The device includes a housing having a fuel inlet port connected to the fuel pump, a fuel outlet port connected to the engine and a fuel return port connected to the fuel tank. A valve member is contained within the interior of the housing and is rotatable between a first position and a second position. The valve member includes a cam surface which variably restricts fluid passageways extending between the inlet port and both the return port and outlet port as a function of the rotational position of the valve member. A control system selectively activates a stepper motor to rotatably drive the valve member between its first and second rotational positions while a transducer coupled to the valve member provides a feedback signal to the control system indicative of the rotational position of the valve member.

Abstract: A piezoelectric control block, particularly for controlling a fuel injection device for a combustion engine, preferably diesel engine, with a distributor injecting pipe, has an adjustable fuel quantity adjusting member, and a longitudinally extending mechanical movement converter which is formed so that under longitudinal load it deforms transversely to its longitudinal expansion and has a part which performs an overproportional movement under the longitudinal load and is connected with the feed quantity adjusting member.

Abstract: Discloses a fuel injection system for the timed introduction of a gaseous fuel such as hydrogen gas into a combustion volume of an internal combustion engine. The system comprises (a) a chamber of fixed volume into which, at one time, gas flows from a fuel source and out of which, at another time, gas flows to a combustion volume of an internal combustion engine and (b) means for varying the pressure of the gas flowing to the chamber.

Abstract: A liquid fuel pumping apparatus for supplying fuel to an internal combustion engine includes a high pressure pump 10 having an outlet 13 for connection in use to an injection nozzle. Fuel is supplied by a low pressure pump to the high pressure pump and the amount of fuel delivered through the outlet is controlled by a spill valve 19 which is electrically controlled. In the event of failure of the spill valve 19 in the control system 24 which controls the valve, the valve is arranged to move to the open position. In order to allow further operation of the associated engine valve means including a valve member 40 which can be moved to an operative position, is provided, the valve means prevents flow of fuel through the spill valve and also throttles the fuel supply to the high pressure pump thereby allowing a limited fuel supply to the associated engine.

Abstract: A fuel control valve for limiting the flow of fuel to an internal combustion engine having fuel injector means. A fuel control valve has a series of orifices in a fuel control block and a cam located in the block and communicating with a fuel pump for an internal combustion engine. The cam is rotatably movable in the control block so as to increase and decrease the cross-sectional flow area for the fuel to the engine by communicating with one or more fuel orifices or jets in the fuel control block. The cam is mechanically connected to the accelerator of the engine so that fuel supply to the stacks leading to the cylinders of the engine is directly controlled according to the operation of the accelerator pedal. In this way, the fuel flow and pressure to the fuel injector is immediately limited when the operator releases the accelerator.

Abstract: Disclosed is a fuel injection system particularly useful on supercharged boat and vehicle drag racing engines which functions to provide a positively controlled uniform fuel/air ratio proportional to engine speed from idle through maximum engine horsepower operation. The system utilizes an engine-driven positive displacement pump supplying pressurized fuel to calibrated injection nozzles via a unique driver-controlled fuel metering valve. This valve has idle and full throttle positions for vehicle racing, but idle, partial and full throttle positions for boat racing. In each application, excess fuel entering a rotary metering valve is returned to the source via continuously open valveless passages and, upon initiation of acceleration, total fuel requirements are supplied to the engine instantly and without delay in a precisely controlled fuel/air ratio.

Abstract: A fuel-injected internal combustion engine wherein fuel is injected in dependence upon a quantity or volume of air supplied to the engine. A throttle valve controls the airflow rate with an O.sub.2 probe, arranged in an exhaust manifold, controlling a timing valve through a control device for enabling a timed relief of injection pressure of the fuel. An ignition starter switch is connected to the control device in such a manner that the timing valve is fully open during an operation of the ignition starter switch so as to enable a starting boost. An adjustable timing member is coupled to an operating switch provided in the control device, which operating switch closes automatically after a termination of the starting process. The timing member maintains the timing valve in a fully open position during a specific time span so as to provide for an after-start boost.

Abstract: A liquid fuel injection system for an internal combustion engine in which the fuel, gaseous under ambient conditions, is injected in liquid form under compression into the intake manifold of the engine. Fuel is controlled largely by intake manifold pressure together with the RPM of the engine. Some fuel bypasses the injector, is vaporized and fed into the intake manifold through a sleeve in sufficient amounts to maintain the engine at idle and low load conditions and prevent the injector from freezing.

Abstract: To avoid danger of fuel leakage into bilges of a vessel's hull, the fuel feed pipe from the fuel supply to the vessel's engine carburetor is enclosed within a cylindrical casing sealed at one end to a fitting on the carburetor. At its other end the casing is sealed to an aperture in the hull, the feed pipe extending externally of the hull between the aperture and a container enclosing the fuel supply. Alternatively the casing is sealed at its other end directly to the container. The carburetor may have an annular fuel feed chamber with adjustable fuel orifices connected to the feed pipe through a scroll valve linked to the carburetor throttle valve.

Abstract: A two speed governor for a fuel pumping apparatus which supplies fuel to an internal combustion engine comprises a source of fuel under pressure which varies in accordance with the speed of the engine. Fuel is supplied through a first orifice and a second orifice in series from the source. The second orifice is defined by a port the size of which is controlled by a manually operable rod while the first orifice is defined by a port the size of which is controlled by a spool responsive to the pressure of the source. The port closes at the maximum allowed engine speed. A third orifice defined by a port is also controlled by the spool and is connected in parallel with the second orifice. The port is closed at speeds above the idling speed of the engine. In the intermediate speed range the engine is controlled by the rod.

Abstract: A control member for regulating a flow of fuel to fuel injection devices of an air-compressing internal combustion engine. The control member is adapted to be arranged in one of a zone of the injection valve or within the injection valve. The control member includes a flow-controlling axially movable control piston having an axial bore with the control piston being urged, by a compression spring, into an end position for preventing a full flow of fuel through the control member. A spring chamber is provided for accommodating the compression spring with a throttle being arranged in an end face of the control piston, which throttle communicates the inlet line means with the spring chamber through the axial bore in the control piston. An arrangement is provided for minimizing an open volume of the spring chamber and at least one first bore is provided in the control piston for selectively communicating the axial bore with the outlet duct.

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 fuel system in which excess fuel is recirculated from the charge forming apparatus. The apparatus comprises a regulator having a body with a fuel supply port connected to a fuel source, an outlet port for supplying fuel to a zone and a return port for receiving excess fuel from the outlet port and recirculating the excess fuel to the fuel supply. In addition, the apparatus may comprise temperature responsive means to vary the size of the return port to vary the quantity of excess fuel recirculated and thus the quantity of fuel supplied to the zone.

Abstract: This disclosure deals with a fuel supply system for a compression ignition, internal combustion engine, which is simple in construction and inexpensive to manufacture. The system includes a plurality of fuel injectors, one injector for each combustion chamber of the engine, and a common fuel supply rail which is connected to all of the injectors. Means is provided to regulate the fuel pressure in the supply rail. The injectors are normally closed but they are sequentially actuated to inject fuel by operation of an injector control circuit. Each injector includes a pintle-type nozzle which normally is held closed by a force applying device, and the control circuit operates to remove the force applying device from each injector in turn. The nozzle of an actuated injector then opens by an amount that is a function of the pressure in the rail, and the quantity of fuel injected is related to the fuel pressure.

Abstract: The invention relates to a fuel injection system provided with a pump and at least one nozzle, in which the fuel quantity which collects by leakage in the spring chamber of the nozzle for the purpose of limiting the speed of the needle as it opens flows out through a throttle valve in a controlled manner. The throttle valve is controlled in accordance with engine characteristics.