Abstract: A low pressure fuel pump control system of a GDI engine may include a low pressure fuel pump primarily pressurizing fuel supplied from a fuel tank, a high pressure fuel pump secondarily pressurizing fuel from the low pressure fuel pump, a low pressure fuel pump pressure sensor and a high pressure fuel pump pressure sensor detecting fuel pressure of the low pressure fuel pump and the high pressure fuel pump, and a fuel supply pressure controller setting a final target pressure of the low pressure fuel pump by correcting a reference pressure, wherein the reference pressure is corrected by a low pressure correcting pressure according to temperature of the low pressure fuel pump and a fuel constellation correcting pressure according to a fuel constellation.

Abstract: The invention relates to an injection system for injecting a fluid into a filter provided in an exhaust system, comprising at least two modules and at least one pressure compensation volume (44, 46, 48, 54, 56, 58), which is designed for feeding fluid to at least one of the modules and hydraulically connects at least two of the modules. Each module comprises at least one injection unit (40, 50, 60) designed for injecting fluid into the exhaust system.

Abstract: A method of manufacturing and controlling a butterfly valve for an internal combustion engine; the manufacturing and control method includes the steps of: establishing a maximum gaseous flow rate value which may flow through the feeding pipe when the butterfly plate is in the closing position; determining a conventional closing position at which the gaseous flow rate which flows through the feeding pipe is essentially equal to the maximum gaseous flow rate value; driving an actuator device so as not to normally pass the conventional closing position; and dimensioning the position of a catch element, so that when a rotational shaft abuts against the catch element the gaseous flow rate which flows through the feeding pipe is essentially lower than the maximum gaseous flow rate value.

Abstract: A plurality of pistons are slidably provided in cylinders of an engine respectively. The engine includes a plurality of connection pipes connecting cylinders successively experiencing combustion to each other during operation of engine, a plurality of opening-closing valves for setting each of connection pipes to a connected state or a closed state, and an ECU for controlling the plurality of opening-closing valves such that the piston is stopped at a predetermined position when the operation of the engine is stopped.

Abstract: A liquid fuel system for an internal combustion engine includes a fuel supply line, a fuel pump connected to the supply line and having an outlet to a carburetor or a liquid fuel injector. A mechanical contact between the pump and a component of the internal combustion engine transmits a cyclic motion from the engine to the pump to cause the pump to pump at a cyclic rate determined by the engine. The pump is a variable displacement pump, so the output flow rate of the pump is diminished by a sufficient backpressure at the outlet of the pump.

Abstract: The present invention relates to a combustion-engined setting tool for driving fastening elements such as nails, bolts, pins and the like in a constructional component and including a fuel source (11), a fuel conduit (12), from the fuel source (11) to the combustion chamber (13), at least one metering device (30) arranged in the fuel conduit (12) between the fuel source (11) and the combustion chamber (13). The setting tool further includes a control device (20) for operating the metering device. The metering device (30) is formed for metering out fuel in form of a n-number of discrete separate portions, with a volume of separate portions being preset and remaining constant.

Abstract: A fuel vapor pressure regulator by which the input pressure of an input fluid is regulated by the opening and closing of a valve unit controlled by a piston pressure sensor, the operation of which is, in turn, controlled by a movement of a preset bias, the output pressure of the fluid delivered by the regulator, and a biasing pressure that reflects the operating demands of the utilization unit to which the fluid is delivered.

Abstract: A no-return loop fuel injection system supplies fuel from a turbine-type fuel pump to an injector fuel rail, through a fuel pressure valve assembly capable of flowing supply fuel to the injector rail, and reverse flowing fuel from the rail and back through the pump to relieve rail fuel pressure. Preferably, the pressure valve assembly has a pressure control valve of a diaphragm type which is biased closed via a spring disposed within a reference chamber defined between a housing and a side of the diaphragm and vented to atmosphere. A fuel chamber defined between an opposite side of the diaphragm and a valve body communicates between a pump-side port and a rail-side port. With the valve in a closed position, the fuel chamber is divided into a rail sub-chamber and a pump sub-chamber via the sealing relationship between a valve seat and the diaphragm, held closed by a closure biasing force of the spring.

Abstract: A no-return loop fuel injection system supplies fuel from a turbine-type fuel pump to an injector fuel rail, through a fuel regulator valve capable of flowing supply fuel to the injector rail, and reverse flowing fuel from the rail and back through the pump to relieve rail fuel pressure. Preferably, the pressure regulator valve is of a diaphragm type biased closed via a spring disposed within a reference chamber defined between a housing and a side of the diaphragm and vented to atmosphere. A fuel chamber defined between an opposite side of the diaphragm and a valve body communicates between a pump-side port and a rail-side port. With the valve in a closed position, the fuel chamber is divided into a rail sub-chamber and a pump sub-chamber via the sealing relationship between a valve seat and the diaphragm, held closed by a closure biasing force of the spring.

Abstract: A flow-through pressure regulator includes a retainer that secures a diaphragm relative to a seat, and includes a cylindrical portion, an axial end portion and an annular portion. The cylindrical portion extends about a longitudinal axis and is fixed with respect to the seat. The axial end portion extends from the cylindrical portion and extends generally orthogonal relative to the longitudinal axis. The axial end portion includes a plurality of apertures that permit fluid communication and are selected so as to reduce noise due to fluid flow.

Abstract: A returnless fuel regulator includes a diaphragm assembly dividing the regulator into a control chamber for calibration purposes and a fuel chamber in communication with fuel under pressure from a supply and a fuel rail which receives fuel under regulation pressure. The regulator includes a spring-biased valve element which is opened to a greater or lesser extent by movement of the diaphragm assembly. In the diaphragm assembly, a post is spring-biased into a predetermined position relative to the diaphragm assembly to engage the valve element. The spring is formed of a shape memory alloy which elongates in response to a predetermined temperature of the fuel within the regulator to open or further open the valve element.

Abstract: A combined fuel regulator and single point metering system comprises a diaphragm-type fuel regulator mounted at one end of a single point injector which carries a solenoid valve operated plunger movable with respect to a fuel distribution block located within the hollow interior of the injector base. The injector base is divided into a fuel outlet cavity located on one side of the fuel distribution block, and an air chamber located on the opposite side which is connected by a one-way valve to source of ambient air, and is also adapted for connection to a turbocharger or the like. The fuel distribution block is formed with a number of passages each directly connected to an air-fuel nozzle within which the fuel and air are intermixed for delivery through separate tubes to each of the cylinders of an internal combustion engine.

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

Abstract: Two embodiments of fuel injection systems for two cycle crankcase compression internal combustion engines that employ two fuel injectors. One fuel injector injects into the combustion chamber while another injects into the induction system of the engine. A simplified regulating system is incorporated so that the first injector receives fuel under a higher pressure than the second injector.

Abstract: A control device for a valve arranged in a fuel injection line of an internal combustion engine and closable to build up of injection pressure at an injection nozzle wherein a play adjusting element is arranged between a valve body of the valve and a drive element, characterized in that the adjusting element (14) is provided with two pistons (15, 22) guided in a housing (13), the first pistion (15) is acted upon by the drive element and the second pistion(22) acts upon the valve body, and the housing (13) accommodates between the pistons (15, 22) an oil-containing pressure chamber (23) which is sealed against the valve (1, 2) and accommodates a pressure spring (24) acting upon the pistions (15, 22).

Abstract: The unit is constituted by a manifold defining a fuel duct for fuel which is supplied to the injectors and by a pressure regulator operable to maintain the pressure of the fuel substantially constant within the manifold. The unit substantially comprises a chamber which is formed within and at one end of the said duct and which is separated from the remaining part of this duct by means of a separation element inserted into the duct itself and shaped in such a way as to define channels for the fuel between the chamber and the remaining part of the duct itself.

Abstract: The device comprises an electromagnetically operated fuel atomisation and metering valve housed in a seat in a body of the device, and a pressure regulator for regulating the pressure of the fuel in a region upstream of the valve; this regulator includes a deformable diaphragm connected to a shutter member operable to control a fuel passage opening between the said upstream region and a discharge; the body of the device includes a support plate for the deformable diaphragm, which is made integrally with the body itself, and the diaphragm is fixed to this latter by means of a bell-shape element defining a chamber closed by the diaphragm and in hydraulic communication with a region downstream of the valve.

Abstract: Liquid fuel from a controlled supply is delivered to a delivery tube under a pressure which is too low to deliver a charge of fuel under static conditions. During an induction stroke however, air entering a cylinder of an engine is drawn through a venturi-type constriction and thereby draws air from a duct by-passing the engine throttle. This air is drawn through a convergent passage to pass the delivery end of the tube at supersonic velocity to draw therefrom a charge of fuel. The tubes for each inlet passage are in permanent communication with the same metered supply so each cylinder draws its appropriate charge in turn.

Abstract: Fuel for a working cylinder chamber (8) of an internal combustion engine is drawn through an atomizing nozzle (39) from an accumulator (30). Fuel is supplied by a low pressure source (12) through a variable constriction (16) linked to the throttle (4) and through a solenoid valve which is pulsed at a frequency proportional to engine speed.

Abstract: A suction space is disposed to selectively communicate with a pump working chamber defined at one end of a plunger via a first communication passageway in which a solenoid valve is arranged, or with suction ports formed in the plunger and communicating with the pump working chamber via a second communication passageway having a restriction therein. The solenoid valve alternately opens and closes for ordinary fuel injection during operation of the engine other than at the start thereof. A selector valve keeps the first communication passageway closed and simultaneously keeps the second communication passageway opened for fuel injection through collaboration of the suction ports with the second communication passageway, in place of the alternate opening and closing of the solenoid valve.

Abstract: A safety device for constant-pressure injection valve of an internal combustion engine. This device blocks the main supply line of the valve permanently and definitely in case the maximum admissible amount of injected fuel is exceeded or the control frequency for a given injected amount, less than the maximum admissible amount, is exceeded. The device is particularly applicable to diesel injection of the pressure-time type.

Abstract: A fuel injection system for an internal combustion engine includes a high pressure injection pump which supplies fuel in timed relationship with an associated engine to an injection nozzle of the engine. A pilot injection device is included in the fuel circuit to the nozzle and includes a shuttle slidable in a cylinder with one end of the cylinder being connected to the pump and the other end to the nozzle. A spring biases the shuttle towards stop means at the one end of the cylinder. In the wall of the cylinder is a pair of spaced ports the first port communicating with a low pressure source and the second port with the pump. The shuttle has a pair of spaced grooves each communicating with the other end of the cylinder. In use, when the pump delivers fuel the shuttle starts to move and displaces fuel to the nozzle until the first groove communicates with the first port. While this communication is established no fuel is supplied to the nozzle and the pressure at the nozzle is reduced.

Abstract: A single pressure regulator controls fuel flow in series through a pair of throttle body injection assemblies adapted to be mounted in remotely spaced locations on an engine intake manifold. The pressure regulator is located in the second assembly, while the first assembly has an accumulator which minimizes pressure fluctuations. The injector in the second assembly has a greater fuel flow capacity than the injector in the first assembly to compensate for the pressure drop caused by the flow restriction between the two assemblies and permit the injectors to provide equal fuel delivery.

Abstract: The invention relates to an internal combustion engine injection pump provided with a regulator unit comprising a mobile valving element on which there act an actuator, elastic means, and the back-pressure of the fuel discharged by the pump on delivery interruption, in order to improve the response characteristics of the regulator unit.

Abstract: A fuel injection apparatus for supplying fuel to an internal combustion engine is proposed. The fuel injection apparatus includes a pump work chamber enclosed within a pump housing, which work chamber is defined at one end by an axially displaceable and rotatable pump piston. The pump work chamber can be made to communicate, during the intake stroke of the pump piston, with a fuel inlet conduit via an electromagnetically actuatable metering valve and a check valve. The metering valve and check valve are combined into a common valve housing and are disposed in the immediate vicinity of the pump work chamber.

Abstract: A flow control device advantageously used in a fuel injection system for a diesel engine. The flow control device includes a spool valve defining on its sides first and second chambers which are connected with each other by means of a throttle. The second chamber is connected to a high pressure pipeline connecting a fuel pump with a fuel injector, while the first chamber is selectively opened to a relief line by means of an electrically operated valve. A cylinder has an annular groove opened to the relief line. When the valve is opened, the first chamber is opened to the relief line. A pressure difference is thus created between the first and the second chambers so as to move the spool valve to open. Thus fuel injection is stopped.

Abstract: A fuel metering device for a fuel injection pump is proposed in which the amount of fuel to be injected is metered by means of a magnetic valve. An electro-magnetic valve and a back pressure valve are placed in series in the fuel supply channel leading to the pump work chamber of the fuel injection pump, whereby the back pressure valve places the closing element of the magnetic valve in the open position during the supply stroke of the fuel injection pump, so that only a small holding current is required to keep the magnetic valve open. Rapid switching of the magnetic valve is achieved by a mechanical closing by means of a closing spring of the magnetic valve after the exciter current is switched off.

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: An electronic fuel supply device for an automotive engine has a vortex flow sensor for sensing the flow of suction air into the engine, an electromagnetic valve which driven for a predetermined time in synchronism with the frequency output from the vortex flow sensor so as to permit the passage of fuel therethrough, and a control valve for limiting the flow of fuel through the electro-magnetic valve. The fuel is metered by the electro-magnetic valve and the control valve, and the fuel may thus be supplied in metered amounts to the fuel injection valves in the respective cylinders for injection into the engine.

Abstract: A single point fuel injection system for an internal combustion engine including a throttle body having first and second air intake throats corresponding to first and second intake manifold planes of the engine, the air flow through each throat being controlled by throttle plates positioned within each throat. The throttle body further includes a fuel accumulating bowl which is integrally formed with the throttle body, the bowl being enclosed by a diaphragm and cover member. Within the enclosure of the fuel bowl are positioned a pair of injectors which are adapted to inject pulsed portions of fuel through a sonic nozzle and into the air intake throat of the throttle body. The injection of pulses of fuel into the throat is timed in accordance with the sensing of the crankshaft reaching a position of 15.degree. before top dead center to enhance the distribution of fuel charge from cylinder to cylinder.

Abstract: A fuel injection pump for an internal combustion engine is proposed having an adjustment piston for the adjustment of the onset of the injection, on which an rpm-proportional fuel pressure determined by a pressure control valve and a pressure valve placed behind it and controllable in dependence on temperature acts. An adjustment device controls a full load stop for the limitation of the full-load fuel maximally injected by the fuel injection pump. The adjustment device has a movable piston for this purpose disposed movably in a work bore. The circumference of the piston is formed as a cam and is scanned by a scanner determining the position of the full load stop. The movable piston is acted on one side by the fuel pressure in the suction chamber and on the other side by a spring and by the fuel pressure between the pressure control valve and the pressure valve. This results in a compensation of the fuel pressure force at the movable piston, which is caused by the pressure 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 fuel injection apparatus for internal combustion engines is proposed (FIG. 1), in which the onset and end of injection are determined by a hydraulically actuated control slide. The injection pumps of the apparatus, which are preferably combined with an injection nozzle to make a pump/nozzle unit, having a central magnetic valve assembly comprising two magnetic valves switched hydraulically in parallel, which valve assembly is inserted in a connection between a control pressure line, which can be placed under control pressure (P.sub.S) from a source of control fuel, and a low-pressure line which is under supply pressure (P.sub.V). In order to initiate the onset of injection, the control slide is placed under control pressure (P.sub.S) by the valve assembly via a distributor apparatus and closes an overflow channel leading out of the pump work chamber. In order to control the end of the injection, the control slide, during its return stroke, relieves this overflow channel toward a low-pressure line.

Abstract: A compression operated diesel fuel injector, for use with an internal combustion engine, is provided with a compression operated piston that is associated with a pump cylinder and plunger to effect pressurization of fuel for discharge from the injector, the piston also defining with the associate injector housing a fuel control chamber. A solenoid actuated valve is operatively positioned to normally block the return flow of fuel from the fuel control chamber to the fuel reservoir for the engine and, a variable flow orifice means is operatively positioned downstream of this valve to control the return fuel flow pressure as a function of engine speed and load to thus regulate the return flow of fuel from the control chamber so as to thereby control engine compression operation of the piston and, accordingly, to correspondingly regulate the rate of fuel injection from the fuel injector.

Abstract: A fuel injection apparatus for use in a motorized two-wheeled vehicle comprising a vehicle body, front and rear wheels mounted thereon, a side stand mounted on one side thereof, and a multi-cylinder type internal combustion engine mounted on the center portion thereof. The engine includes plural cylinders positioned laterally with respect to the body, plural fuel injection nozzles, a fuel pump, and a delivery pipe for delivering fuel supplied from the fuel pump to the plural nozzles, wherein the plural nozzles are disposed laterally in the direction of the plural cylinders and the delivery pipe is disposed laterally in the direction of the plural nozzles. The engine further includes a fuel pressure regulator coupled to one end portion of the pipe, the one end portion being on the opposite side of the side of the vehicle body having the side stand.

Abstract: A secondary fuel metering control system for a normally solenoid valve controlled spill-inject-spill type engine driven fuel injection pump includes an isolation valve to control spill flow from the pump chamber of the pump back to the fuel reservoir, a pivotal metering valve operative to meter fuel flow to the pump chamber, and an actuator means including an operator actuated accelerator means and an electrical actuator for controlling pivotal movement of the metering valve.

Abstract: A fuel control system for improving the driveability of a high power to weight ratio vehicle by using power as the controlled parameter. In the system, an operator command signal is compared to a quantity of fuel per engine revolution signal to develop an error signal proportional to the difference between actual power being delivered from the engine and operator commanded power.

Abstract: The invention relates to a fuel injection system with a device for controlling the preliminary and principal injections wherein control is effected by intermediate relief of the injection pressure which includes a slide valve for exerting the control which is braked during its reverse movement before interrupting the connection between the pressure chamber of the injection nozzle and the delivery line leading to the injection pump to thereby make possible the relief of the pressure chamber toward the injection pump, i.e. to avoid dribbling.