Abstract: A fuel supply device has a main line, a fuel pump, a first return line, a second return line, a valve mechanism, a first pressure regulator, and a second pressure regulator. The fuel pump is arranged in a fuel tank or in the vicinity of the fuel tank, and pressurizes the fuel in the fuel tank and supplies the furl to a fuel distribution pipe via the main line. The first return line returns the fuel from the fuel distribution pipe to the fuel tank. The second return line is branched from the main line in the vicinity of the fuel pump and returns the fuel from the main line to the fuel tank. The valve mechanism selectively connects and disconnects the second return line with respect to the main line. The first pressure regulator is arranged in the first return line. The second pressure regulator is provided in the second return line and adjusts fuel pressure to a lower level than the first pressure regulator does.

Abstract: A fuel system is disclosed. The fuel system has a first pump supplying fuel at a first pressure. The fuel system also has a fuel filter fluidly connected downstream of the first pump. The fuel system further has a second pump receiving fuel at a second pressure and fluidly connected downstream of the fuel filter. The fuel system additionally has a first passage fluidly connecting an outlet of the first pump to an inlet of the first pump. The fuel system also has a valve located within the first passage and configured to selectively allow fuel flow through the first passage. The fuel system further has a second passage fluidly connecting an inlet of the second pump to the valve, wherein the second pressure acts on the valve to affect fuel at the first pressure to flow to the inlet of the first pump via the first passage when the second pressure is greater than a predetermined pressure.

Abstract: A method of controlling a common rail fuel system for an engine is disclosed. The method includes delivering fuel to a fuel injector fluidly coupled to a common rail. The common rail is fluidly coupled to a fuel tank through a pump. The method also includes sending a signal to the fuel injector to deliver a first quantity of fuel to the engine. The first quantity being indicative of a desired power from the engine. The method further includes detecting a fuel transfer pressure upstream of the pump, and derating the engine as a function of the detected fuel transfer pressure. The derating includes decreasing the first quantity of fuel.

Abstract: A fuel supply system for delivering fuel to, for example, a common rail of a diesel engine fuel injection system. The fuel supply system includes a priming pump, a feed pump, a fuel filter disposed downstream of the feed pump, a return path, and a return valve. When the pressure of the fuel between the feed pump and the fuel filter exceeds a first set pressure, the return valve is placed in a first open position to open the return path to return the fuel from downstream to upstream of the feed pump. When the pressure of the fuel, as fed by the priming pump, exceeds a second set pressure, the return valve is placed in a second open position to open the return path to direct the fuel, as fed by the priming pump, to upstream of the fuel filter to prime the fuel filter directly.

Abstract: A fuel pump module comprising a fuel pump, a pressure regulator, a supply line check valve, a relief valve, and a flange adapted to engage a fuel supply line that fluidly links the fuel pump module with an injector rail. The pressure regulator is adapted to maintain a predetermined fuel pressure between the fuel pump and the supply line check valve. The supply line check valve is adapted to facilitate a minimum fuel pressure in the fuel supply line. The relief valve is adapted to limit the maximum fuel pressure in the fuel supply line. The supply line check valve, the relief valve, and the flange are integrated to form a single fluidly interconnected structure disposed within a fluid path between the pressure regulator and the fuel supply line. An integrated casing may house the fuel pump and the pressure regulator.

Abstract: A fuel supply circuit for a Diesel engine includes fuel injectors, a fuel tank, a main pump for delivering fuel to the injectors, and a variable flow charge pump for delivering fuel from the tank to an inlet of the main pump, and a surplus fuel line communicating unburned fuel from the injectors to an inlet of the charge pump. The circuit also includes a temperature sensor which senses a temperature of fuel discharged by the charge pump, and a pressure sensor which senses a pressure of fuel discharged by the charge pump. A bleed line communicates fuel from an outlet of the charge pump to the tank. A solenoid operated bleed valve and a pressure relief valve control flow through the bleed line. An electronic control unit controls the charge pump and the bleed valve as a function of the sensed parameters.

Abstract: A fuel system that supplies fuel to an engine of a vehicle. The fuel system includes a pump that pumps fuel and a controller that selectively changes operation of the pump between an electronic returnless fuel system mode and a mechanical returnless fuel system mode. In the electronic returnless fuel system mode, the outlet of the pump is varied, and in the mechanical returnless fuel system mode, output of the pump is maintained approximately constant.

Abstract: A fuel supply device for a gas engine is provided that includes a vaporizer (17) that gasifies a first fuel (FA), a primary regulator (18) that regulates the pressure of the first fuel (FA) introduced from the vaporizer (17), a fuel changeover valve (19) that has a first inlet passage (40A) to which is introduced the first fuel (FA) fed out from the primary regulator (18), a second inlet passage (40B) to which is introduced a second fuel (FB) fed out from a second fuel source (11B), and a common outlet passage (41) and can selectively connect the first and second inlet passages (40A, 40B) to the outlet passage (41), a common secondary regulator (21) that regulates the pressure of the first fuel (FA) or second fuel (FB) fed out from the outlet passage (41) of the fuel changeover valve (19) so that it is at substantially atmospheric pressure and supplies it to a mixer (3), and a cutoff valve (20) that opens/closes a fuel passage between the fuel changeover valve (19) and the secondary regulator (21) in response

Abstract: A fuel pump module comprising a fuel pump, a pressure regulator, a supply line check valve, a relief valve, and a flange adapted to engage a fuel supply line that fluidly links the fuel pump module with an injector rail. The pressure regulator is adapted to maintain a predetermined fuel pressure between the fuel pump and the supply line check valve. The supply line check valve is adapted to facilitate a minimum fuel pressure in the fuel supply line. The relief valve is adapted to limit the maximum fuel pressure in the fuel supply line. The supply line check valve, the relief valve, and the flange are integrated to form a single fluidly interconnected structure disposed within a fluid path between the pressure regulator and the fuel supply line. An integrated casing may house the fuel pump and the pressure regulator.

Abstract: The present invention includes a fuel supply apparatus having a pressure regulator for regulating a pressure of fuel supplied from a fuel pump to a target, such as an internal combustion engine of an automobile. The pressure regulator includes a first pressure chamber, a second pressure chamber and a third pressure chamber each configured to be able to receive a supply of the fuel from the fuel pump. A first diaphragm separates the first pressure chamber and the second pressure chamber from each other. A second diaphragm separates the second pressure chamber and the third pressure chamber from each other. The first pressure chamber has a discharge port that can discharge the fuel supplied into the first pressure chamber.

Abstract: A method for operating fuel system that supplies fuel to a plurality of injectors in an internal combustion engine via a first pump and a second pump with a bypass circuit coupled between the first and second pump for returning fuel to a fuel tank, the pumps connected in series, is provided. The method includes before actuating fuel injectors during an engine start, operating the first pump, where fuel is driven through the bypass circuit that generates a fuel pressure that is delivered to the injectors that is greater than the fuel pressure delivered to the injectors during the moderate pressure mode of operation when the bypass regulator is maintaining a constant fuel line pressure. The method also includes during actuation of the fuel injectors after an engine start, operating the first and second pumps, where fuel pressure is regulated at a specified regulator pressure via bypass flow in the bypass.

Abstract: A fuel pump module within a fuel tank employs at least one fuel pump, while in the case of additional fuel pumps, a manifold receives all pumped fuel and directs it into a surrounding fuel filter within a filter case. A check valve is adjacent the filter case at a first location and a pressure regulator is adjacent the check valve. With the check valve located between the filter case and the pressure regulator, high fuel pressures may be maintained in the engine supply line when the engine is shut off, while during engine operation the pressure regulator may relieve excessive fuel pressure and deliver fuel to the engine through an engine supply line. A jet pump supply line exits the filter case at a second case location and supplies fuel to one or more jet pumps, such as a fuel pump module reservoir jet pump.

Abstract: A gas powered internal combustion engine in which the gas is provided from pressurized liquid gas in an LPG container and in which the LPG container is rigidly mounted adjacent to the internal combustion engine at a preselected angle to be in conductive heat transfer relationship to the internal combustion engine and in vibration receiving relationship to the internal combustion engine whereby the liquified gas in the LPG container is heated and the effective surface area thereof is increased.

Abstract: In a fuel supply system, a fuel pump supplies fuel from a fuel tank to a fuel supply piping and to a back pressure introducing passage. A pressure regulator has a fuel pressure regulating chamber communicated to the fuel supply piping, and a back pressure chamber communicated to the back pressure introducing passage. When a fuel pressure in the fuel pressure regulating chamber is larger than a relief pressure that bulges the diaphragm toward the back pressure chamber, a relief valve opens a relief port to return the fuel from the fuel pressure regulating chamber to the fuel tank. The relief pressure is adjusted by controlling a fuel pressure in the back pressure chamber of the pressure regulator.

Abstract: In a diesel engine system of a liquefied gas fuel, the present invention aims at the prevention of storing of the liquefied gas fuel in a cam chamber even when a diesel engine repeats stopping and operation thereof without returning the liquefied gas fuel in a fuel gallery of a fuel pressurizing device such as a supply pump or an injection pump to a fuel tank. An electrically-operated compressor 16e is subjected to an ON/OFF control by a cam chamber pressure regulating part 20. In the inside of a cam chamber 12, a cam chamber pressure sensor 121 which detects a pressure in the inside of the cam chamber 12 is arranged.

Abstract: In a fuel system for an internal combustion engine, the fuel is pumped by a high-pressure fuel pump into a fuel pressure accumulator, from which it is supplied into at least one combustion chamber via at least one injector. A value is provided for the actual pressure in the fuel pressure accumulator. A pressure regulating device using which the fuel may be extracted from the fuel pressure accumulator is precontrolled using a precontrol signal, which is ascertained taking into account a setpoint pressure in the fuel pressure accumulator. A value for a fuel quantity flowing through the pressure regulating device is taken into account when ascertaining the precontrol signal.

Abstract: Disclosed is a fuel conveying device including a valve housing in which a pressure release valve and a non-return valve are arranged parallel to one another, the pressure release valve having a first inlet, which downstream of a valve seat opens into a valve chamber in which a valve body is movably arranged and which is in fluid connection with a second inlet for the non-return valve via a first outlet. The device improves the control response of the pressure release valve by providing the first outlet at the periphery of the valve chamber and in the axial direction with respect to a valve axis such that when the pressure release valve is open the flow from the valve chamber into the second inlet is a substantially radial flow.

Abstract: A fuel supply system provided in a fuel tank includes: a fuel pump that sucks fuel reserved within the fuel tank via a suction filter and discharges the sucked fuel; a pressure regulator that maintains pressure of the fuel discharged from the fuel pump within a predetermined range; a pump holder that holds the fuel pump and the pressure regulator; and a cushioning rubber extending in radial and axial directions of the fuel pump between the pump holder and the fuel pump for damping vibrations associated with driving of the fuel pump. Excess fuel is introduced in a flow path from the pressure regulator to the suction filter. The flow path includes: a gap defined between the pump holder and the cushioning rubber; and a gap defined between the cushioning rubber and the fuel pump.

Abstract: A method and a device for controlling a fuel injection system for an internal combustion engine of a motor vehicle, whereby the internal combustion engine has a common rail, a high-pressure pump, a flow control valve for controlling the fuel delivery rate of the high-pressure pump into the common rail and a control unit for triggering the flow control valve. The method comprises the steps of determining the prevailing fuel demand in the common rail as a function of the prevailing driving state of the vehicle and controlling the pulse duty factor and frequency of the triggering of the flow control valve as a function of the prevailing fuel demand determined in the common rail.

Abstract: A fuel feed apparatus includes a lid member that plugs an opening of a fuel tank. A protruding member protrudes from the lid member into an inside of the fuel tank. A sub-tank is accommodated in the fuel tank. The sub-tank is axially movable relative to the lid member. A pump module is accommodated in the sub-tank. The pump module includes a fuel pump and a fuel filter. The fuel pump pumps fuel from the fuel tank. The fuel filter circumferentially surrounds the fuel pump for removing foreign matters contained in fuel discharged from the fuel pump. A supporting member connects the pump module with the sub-tank. The supporting member extends inwardly with respect to a substantially radial direction of the sub-tank. The supporting member defines a recess on a side of the lid member. The protruding member is adapted to be inserted in the recess.

Abstract: A method of controlling an air to fuel ratio of an internal combustion engine may include receiving a request for a modification of a first flow of fuel to at least one combustion chamber, modifying the first flow of fuel in response to the request, receiving a first signal indicative of a first air supply condition, displacing a second flow of fuel in response to receiving the signal and controlling the modification of the first flow of fuel by the displacement of the second flow of fuel.

Abstract: A fuel pump module within a fuel tank employs at least one fuel pump, while in the case of additional fuel pumps, a manifold receives all pumped fuel and directs it into a surrounding fuel filter within a filter case. A check valve is adjacent the filter case at a first location and a pressure regulator is adjacent the check valve. With the check valve located between the filter case and the pressure regulator, high fuel pressures may be maintained in the engine supply line when the engine is shut off, while during engine operation the pressure regulator may relieve excessive fuel pressure and deliver fuel to the engine through an engine supply line. A jet pump supply line exits the filter case at a second case location and supplies fuel to one or more jet pumps, such as a fuel pump module reservoir jet pump.

Abstract: In a fuel supply device for the supply of fuel from a fuel tank to an internal combustion engine, with at least one electrically driven fuel pump arranged in the fuel tank which pump conveys fuel out of a fuel tank to the internal combustion engine via a fuel supply line, wherein a fuel line extends from the fuel supply line to a suction jet pump pumping fuel from the fuel tank to a collecting tank in which the electrically driven fuel pump is disposed and wherein a throttle is arranged upstream of the suction jet pump in the fluid line leading to the suction jet pump, a pressure limiting valve is provided upstream of the suction jet pump and downstream of the throttle for limiting the pressure of the fuel operating the suction jet pump thereby reducing or eliminating the noise generated by the suction jet pump.

Abstract: The invention relates to a fuel feed unit (2) for a motor vehicle, comprising a volume flow reducing valve (13, 14) that is mounted in a pump fluid line (11, 12) leading to a suction jet pump (5, 6). Said volume flow reducing valve (13, 14) reduces the fuel volume flow supplied to the suction jet pump (5, 6) when the feed pressure of the fuel pump (4) increases, thereby avoiding unnecessary feed of fuel to the suction jet pump (5, 6).

Abstract: A valve (49) which is intended for insertion into the line connecting a fuel pump to a system of injection valves and which is designed as a pressure-maintaining valve is characterized by a pipe body (50) intended to have a flow passing through it, into which a sleeve (53) is inserted which forms a damping cylinder (55) in a middle region, inside which damping cylinder one end of a blocking body (57) is received so as to be able to slide in the direction of the axis (58) of the pipe body (50). The opposite end of the blocking body (57) is characterized by a sealing body (67) which is formed from an elastomeric material and which cooperates with a valve seat (66) which is allocated a through bore (65) in a transverse wall (63) of the pipe body (50). The blocking body (57) lies against this valve seat under resilient pretensioning and the movement of the blocking body is damped or is accompanied by the lowest possible noise development by reason of the cooperation with the damping cylinder.

Abstract: A fuel filter is located downstream of a feed pump to filter fuel discharged from the feed pump. An orifice is located between the fuel filter and a suction quantity control valve to restrict a flow rate of the fuel passing through the fuel filter. A positive pressure of the feed pump is applied to the fuel filter, and a passing pressure at the fuel filter increases. Even if viscosity of the fuel increases and the fuel becomes wax-like at low temperature, clogging of the fuel filter or an insufficient flow rate can be inhibited. The orifice restricts the flow rate of the fuel passing through the fuel filter. Accordingly, an increase in size of the fuel filter can be prevented even if the fuel filter is located downstream of the feed pump.

Abstract: A fuel injection valve (10) with a pressure boosting unit is provided in an engine (1), and boosted pressure fuel injection is performed by increasing a pressure of fuel supplied to a fuel injection valve from a common rail (3). An ECU (20) decides a pressure boosting period that is defined as a time period from when the pressure of the fuel starts to be boosted until when the fuel injection is started using a numerical table in which a fuel injection amount and an engine rotational speed are used as parameters, and sets fuel injection control parameters such as a fuel injection period and pressure boosting starting timing, based on the pressure boosting period. Since the fuel injection control parameters are set based on the pressure boosting period, the control that is performed when the boosted pressure fuel injection is performed is simplified.

Abstract: A fuel injection system operates under a substantially constant pump speed and creates multi-pressure levels by diverting the fuel flow. Fuel pressure can be switched from one steady pressure level to another level on-demand instantly. This superimposes and overlaps typical fuel injection events in the linear operating ranges under different pressure levels, significantly increasing the fuel injection dynamic range. Lower fuel injection when idle or during city driving reduces fuel consumption per mile traveled and reduces exhaust emission that causes smog in metropolitan areas. The system delivers additional power to the engine instantly at peak load on-demand, reduces idle speed with the engine running smoothly, does not change fuel tank temperature, and may enhance the life of the fuel pump.

Abstract: A mixture formation means for the reformer of a fuel cell system or for a heater. The fuel feed includes a pressure impulse injection means and the mixture formation area is a swirl chamber having a discharge nozzle connected to the pressure impulse injection device. Also included is a fuel heater for preheating the fuel before injection in order to achieve complete vaporization of the fuel, such as diesel fuel.

Abstract: A fuel supply apparatus for an internal combustion engine is disclosed. The fuel supply apparatus includes a fuel pump driven by the engine, a pressure accumulating device for retaining the fuel pressurized by the fuel pump, a relief device which opens when a fuel pressure in the pressure accumulating device exceeds a predetermined upper limit pressure. An injection device is connected to the pressure accumulating device and injects fuel into a combustion chamber of the engine. A fuel pressure in the pressure accumulating device is detected. A discharge amount of the fuel pump is controlled so that the detected fuel pressure coincides with a target fuel pressure. The target fuel pressure is reduced when the detected fuel pressure is equal to or greater than a predetermined fuel pressure, to suppress opening of the relief device.

Abstract: A reservoir 10 is provided for mounting to a bottom of a fuel tank of a vehicle. The reservoir includes wall structure 13 coupled with a bottom to define an interior space 17. The bottom has an internal surface 27 within the interior space, an external surface 15, and an opening 12 in the bottom. A check valve 11 is associated with the opening. Valve protection structure 16 extends from the external surface and is provided continuously about the entire perimeter of the bottom to define a plurality of tortuous paths P for fuel flow from the tank to the opening. Feet structure 26 extend from the external surface to contact the bottom of the tank. A plurality of pockets 30 are provided in the internal surface 27 of the bottom for collecting foreign particles that may enter the reservoir.

Abstract: A fuel pressure regulator for use in internal combustion engines. The fuel pressure regulator includes a valve seat and a vale body disposed downstream of the valve seat and is designed to move the valve body away from the valve seat through the pressure of fuel applied directly to the valve body. This eliminates the need for a diaphragm and results in a simplified structure of the fuel pressure regulator.

Abstract: The invention concerns a method for controlling high pressure fuel supply of a set of injectors connected to a common high pressure chamber, called common rail C in a direct injection fuel circuit, through a high pressure pump (P), by acting on the low pressure supply of said pump (P) through an electromagnetic slide valve (E), controlled by the computer managing the operating conditions of the engine which consists in providing, inside the electromagnetic valve (E) one or more internal leakage flows, either from high pressure to low pressure, or from low pressure upstream of the electromagnetic valve (E) to the low pressure downstream thereby solving the specific problems related to the three operating modes of the engine: engine brake, engine shutdown, idle speed.

Abstract: A fuel injection system for an internal combustion engine and having a high-pressure fuel pump and a fuel injection valve for each engine cylinder. A first electrically actuated control valve controls a connection of the pump working chamber to a low-pressure region and a second electrically actuated control valve controls a connection of a control pressure chamber of the fuel injection valve to a relief region. A pressure reservoir is filled by the high-pressure fuel pump and from which fuel can be withdrawn in order to execute a fuel injection with the fuel injection valve independent of the delivery from the high-pressure fuel pump. The connection between the fuel pump and the pressure reservoir and injection valve contains a coupling device having a piston acted on at one end by the pressure prevailing in the pressure reservoir acted on at the other end by the pressure prevailing in the connection.

Abstract: To make a length in a horizontal direction of a vapor return joint small, thereby improving an assembling property of a fuel flow path module to a fuel tank, a vapor inflow hole, a fuel outflow hole and a regulator fuel inflow hole are provided in a fuel tube portion of a fuel flow path module, a vapor return joint is provided uprightly in an upper side of the vapor inflow hole, the vapor return joint comprises by a first straight pipe portion, and a second straight pipe portion connected to an upper end of the first straight pipe portion at a narrow angle A downward, an intersection between the first straight pipe portion and the second straight pipe portion is arranged above an upper opening end of the second straight pipe portion.

Abstract: A pressure relief valve useful in vehicle fuel delivery systems includes a spring biased, concave conical flow directing surface and a spherical valve seat.

Abstract: A no-return loop fuel injection system supplies fuel from a fuel pump to an injector fuel rail, through a fuel line. A biased closed pressure control valve communicates with the fuel line and has a valve head preferably of a diaphragm type carrying a fuel side having first and second areas which are segregated and defined by a valve seat when the pressure control valve is closed. An opposite second side of the pressure control valve is exposed to a reference pressure and a closure biasing force. The pressure control valve opens when a hydraulic opening force induced by a fuel pressure exerted upon the first area, plus a fuel pressure exerted upon the second area, is greater than the net reference pressure and closure biasing forces. Preferably, the first area is smaller than the second area, thus manipulating the effects of the fuel pressures exerted upon the first and second areas with respect to opening the valve.

Abstract: A compressed gaseous fuel system for an internal combustion engine includes an electronic engine controller, a common fuel rail, fuel injectors operatively connected with the common-rail and with the engine controller, and a high pressure gaseous fuel source. A control regulator reduces gas system pressure to a final variable control pressure specified by the engine controller and furnishes the fuel at the control pressure to the common-rail. A fuel pump operatively connected with the control regulator and with the engine controller selectively transfers fuel from the fuel rail to a portion of the fuel system located upstream from the downstream pressure regulator in the event that the pressure within the common-rail exceeds a desired pressure.

Abstract: A fuel pressure adjusting apparatus which includes a casing which includes a fuel introduction port, and a fuel discharge port; and a cylindrical member which is housed in the casing, and which includes a valve seat at an end portion thereof, and a communication passage therein, the communication passage connecting the fuel introduction port to the fuel discharge port; a valve element which is provided on a fuel discharge port-side of the valve element in the casing, and which closes the communication passage when the valve element is seated on the valve seat; and a leaf spring which is provided at the fuel discharge port, and which applies force to the valve element in a direction toward the valve seat. The leaf spring includes a concave portion which supports the valve element, and which is formed such that there is a gap between the concave portion and the valve element.

Abstract: A system that enables enhanced air flow to the air intake of an internal combustion engine having a turbocharger is disclosed. The air induction system includes a plenum or expansion chamber located within the area directly in front of the inlet of the turbocharger. Alternatively, the air induction system may include a diffuser and/or an expansion chamber for reducing the velocity of the air flow within the clean air duct in an area directly in front of the inlet of the turbocharger.

Abstract: An in-tank fuel module for a fuel tank having a conductive lead for connection to an electrical ground plane and at least a first electrically conductive component, and a conductive polymeric strand electrically connecting the component to the lead. A jet aspiration pump is made of conductive polymeric material. A conductive component is connected to the ground plane through the fuel level sensing assembly circuit.

Abstract: A fuel delivery system is provided with a fuel solenoid valve to minimize fuel leakage and evaporative emissions during diurnal cycles by preventing pressure buildup as the temperature of the fuel system rises. The fuel solenoid valve is located between a pressurized side of the delivery system and a fuel tank. In one embodiment, the fuel solenoid valve is closed when the engine is running or when the engine is off and the rail is hot. When the fuel rail cools down, the solenoid valve opens to bleed a desired amount of fuel thereby creating a fuel vapor space. Thereafter, during hot soak conditions of the diurnal cycles when the fuel rail is hot again while the engine is off, the pressure will rise due to the thermal expansion of the fuel and the created fuel vapor space minimizes further rising of the fuel pressure. Further, by adjusting the solenoid valve opening time, the pressure rising limit may be set at a desired pressure to minimize injector leakage.

Abstract: A valve mechanism to control fluid flow between a fluid pumping device and a system that includes an inlet from the fluid pumping device, a first valve, a second valve, a first outlet fluidly connected to the system, and a second outlet. The first valve prevents backflow of fluid when the fluid pumping device discontinues pumping fluid to the system. The second valve checks fluid flow through the valve to the first outlet when fluid pressure at the inlet is less than a first predetermined pressure. The second valve permits fluid flow from the pump through the valve to the system only when fluid pressure at the inlet is greater than the first predetermined pressure. The second valve prevents fluid pressure in the system from substantially exceeding a second predetermined pressure when the pumping device is not pumping fluid to the system.

Abstract: The invention relates to a fuel filter for an internal combustion engine, comprising a filter housing consisting especially of metal, and a filter element and a pressure-regulating valve located in said filter housing. The aim of the invention is to ensure that no noise originating from the pressure-regulating valve is emitted. To this end, the pressure-regulating valve is mounted in the filter housing in such a way that vibrations are dampened.

Abstract: A valve for controlling flow of a fluid includes a valve body defining at least in part an inlet, an outlet, at least one chamber, and an orifice in communication with the chamber. A valve member is received at least in part in one chamber for reciprocation or rotation between an open position permitting fluid flow through the inlet and into the outlet, and a closed position at least substantially restricting fluid flow through the outlet. In the reciprocating version the movement of the spool toward its open position causes fluid in the chamber to be displaced out of the cavity through the at least one orifice. In one exemplary embodiment, a fuel system includes a valve between a primary fuel pump and a secondary fuel pump driven by a portion of the output of pressurized fuel from the primary fuel pump.

Abstract: In a common rail gasoline fuel injection system having a high pressure fuel supply pump (14) in which fuel is pressurized in a pumping chamber and delivered through a high pressure passage (16) to the common rail (18), the improvement comprising a flow volume intensifier (22) situated in the high pressure passage (16). Preferably the intensifier has a cranking configuration in which a primary piston (32) of relatively low effective cross sectional area on which only the primary pressure of the pumping chamber is imposed, and a secondary piston (44) contacting the primary piston (32) and having a relatively large effective cross sectional area on which only the common rail pressure is imposed, whereby when the primary piston (32) is displaced a primary volume toward the secondary piston (44) by the primary pressure from the pumping chamber, the secondary piston (44) displaces a secondary volume of fuel into common rail (18) that is larger said primary volume.

Abstract: A composite control valve is constructed by a valve housing, a negative pressure working chamber defined in the valve housing to communicate with a negative pressure generating section in the engine, a first control valve operable to be opened and closed with generation and extinction of a negative pressure in the negative pressure working chamber, and a second control valve operable to be opened and closed with the generation and losing of the negative pressure in the negative pressure working chamber. The first control valve is incorporated into an air vent system which provides communication between an upper space in a fuel tank and the atmosphere, and the second control valve is incorporated into a fuel passage system which provides communication between a portion of the fuel tank below a fuel oil surface and a fuel supply section in the engine.

Abstract: A ported pressure relief valve (10) used in an automotive fuel system (F) includes an unrestricted constant bleed orifice (32) for routing pressurized fuel from a fuel pump (P) back to a fuel source (T, M) when an engine (E) is running. A check valve (30) prevents flow from a fuel system back to the fuel source when the engine is off, so to retain sufficient pressure in the delivery system that the engine will readily start when cranked. A pressure relief valve (50) drains fuel from the delivery system back to the source of fuel in response to a pressure build up in the fuel delivery system above a predetermined pressure level so to prevent an overpressure condition which would otherwise damage the fuel delivery system.

Abstract: The invention relates to a fuel module for the introduction of fuel from a fuel tank 91) to an internal combustion engine, comprising a supply pump (9), through which fuel is taken up and supplied to a container (2) and a main pump (3), which takes up fuel from the container (2) and supplies the internal combustion engine at high pressure. The supply pump (9) is a low-pressure pump, the outlet of which feeds into the container (2) through a fine filter (11).

Abstract: A gasoline direct injection system of an engine has a high pressure pump with an output connected to a fuel rail that supplies a plurality of fuel injectors. A control valve is connected in parallel with the pump to maintain the fuel rail pressure at a consistent level as the fuel injectors open and close. A valve element engages and disengages a seat to control the flow of fuel through the control valve. The high pressure from the fuel supply rail acts on surfaces of the valve element which are designed to produce a force imbalance that serves to rapidly open the control valve. An electromagnetic actuator, that closes the control valve, has a low impedance coil and pole pieces made of soft magnetic composite material to minimize eddy currents that impede valve performance.