Abstract: A fuel system for an internal combustion engine, the fuel system including a fuel tank, a fuel pump communicating with the fuel tank, a fuel manifold downstream of the fuel pump, and a return line downstream of the fuel pump, the return line communicating with the fuel tank. The fuel system also includes a self-relieving fuel filter assembly having a filter member. The self-relieving fuel filter assembly communicates with the return line and is variable between a first state, wherein fuel passes through the return line and the filter member before returning to the fuel tank, and a second state, wherein fuel passes through the return line without passing through the filter member before returning to the fuel tank. The self-relieving fuel filter assembly therefore permits the continuous passage of fuel through the return line even when the filter member becomes plugged.

Abstract: A fuel system including first and second tank portions, first and second fuel pumps in the first and second tank portions, respectively, a first crossover fuel line for transferring fuel from the second tank portion to the first tank portion, and a second crossover fuel line for transferring fuel from the first tank portion to the second tank portion. In one aspect of the invention the first and second tank portions define a bifurcated tank and the first and second crossover fuel lines are housed completely within the bifurcated tank. In another aspect of the invention, the first and second crossover fuel lines extend partially outside the bifurcated tank.

Abstract: A fuel tank cover assembly for a fuel tank of a vehicle includes a cover adapted to close an opening in the fuel tank having a fuel reservoir disposed therein and an insert disposed within the cover and adapted to decouple inertia of the fuel reservoir from the cover under severe impact conditions.

Abstract: A plastic tank comprises a line which is connected at least in certain sections to its wall and is formed in one piece with the plastic tank. For its production, the plastic tank is injection-moulded between a hollow mould and an inner mould inserted into the latter, the mould having a recess, in which a sprue body is formed as the starting material for the line. Before this sprue body can solidify completely, material is blown out from it by means of the internal gas pressure or pressure blowing technique via channels provided in the mould, so that the required line is created there. The lines may be arranged on the outside and/or inside and parallel and/or at an angle to the tank walls.

Abstract: An accumulator fuel injection system for controlling an injection rate according to the operating state of an engine comprises: a first accumulation chamber 2 for containing high-pressure fuel supplied by a fuel supply pump 1; a first electromagnetic valve device 4 provided in a fuel passage 30, which connects the first accumulation chamber 2 with a fuel injection valve 8, the first electromagnetic valve switching the fuel passage 30 between a connected state or a disconnected state; a branch passage 32 branched from the fuel passage 30 at downstream side of the first electromagnetic device 4, the branch passage 32 having sufficiently lower constant fuel pressure than fuel pressure in the first accumulation chamber 2; and a second electromagnetic valve device 9 provided in a fuel return passage 33 connecting the fuel injection valve 8 with a fuel tank 10, the second electromagnetic valve device 9 switching fuel, which is injected from the fuel injection valve 8, between an injected state and an uninjected sta

Abstract: A metal fuel tank (1) with two tank shells (1a, 1b) which are welded together, an electrically driven fuel supply unit (2) inside the tank, and also with lead-in ducts for at least one metal fuel line (3) and for a connection device for supplying electricity to the fuel supply unit (2). The tank (1) is produced in such a way as to mount the fuel supply unit (2) from inside the tank (1) before the tank shells (1a, 1b) are welded together, and to have the lead-in ducts running through at respectively separated points through the tank shells (1a, 1b) which are created using gas-tight means of connection.

Abstract: A fuel supply apparatus for an internal combustion engine includes a fuel pump disposed in a fuel tank. The fuel tank is supported by a tubular bracket secured to a mounting plate installed in an opening of a fuel tank and extending into the fuel tank. The bracket surrounds the fuel pump and restrains the fuel pump along its outer periphery. The bracket may include inwardly projecting portions for restraining the fuel pump.

Abstract: A fuel injection system for an engine includes an improved construction to inhibit heating of the fuel. A fuel reservoir is arranged to store the fuel therein. A fuel pump is provided for delivering the fuel in the reservoir to a fuel injector which sprays fuel toward a combustion chamber of the engine. The fuel pump is driven by an electric motor that is intermittently powered. In one embodiment, a control device is provided for controlling the duration for which the electric motor is powered. A duty ratio of the duration is preferably determined in response to an amount of the fuel that is required to be sprayed by the fuel injector.

Abstract: A feed device for fuel has a feed pump driven by an electric motor and a housing which receives the electric motor. The feed pump and a filter arrangement which has a preliminary pump and a main pump arranged respectively before and behind the feed pump in the fuel flow direction are provided in the housing. The feed pump transports the main flow of fuel through a central recess in the filter pot at the input flow side of the main filter of the filter arrangement. A side channel pump which is open on one side is arranged at the feed pump as a preliminary stage thereof. The fuel can be delivered subsequent to the preliminary filter to a rise pipe and then into a pot housing to a suction area of the main stage of the feed pump.

Abstract: A fuel system pressure valve includes is interposed in a fuel line between a fuel pump and a fuel rail for controlling fuel flow from the pump to the rail and from the rail to the pump. The valve includes a valve housing having a pair of half sections to form a valve chamber. A check valve is mounted in the chamber and is operable to allow fuel flow from the pump to the fuel line upon the fuel pump delivering a predetermined fuel pressure to the fuel line. A pressure relief valve is mounted within the chamber parallel to the check valve and is operable to allow fuel in the fuel line to flow through the housing to the fuel pump upon fuel pressure in the fuel line exceeding a predetermined relief pressure. In addition, a parasitic flow orifice is mounted in fluid communication with the valve chamber and allows fuel in the valve chamber to flow through the orifice to a fuel tank when valve chamber pressure is below a predetermined valve chamber pressure.

Abstract: A pressure regulating valve that is used to regulate the pressure in a fuel reservoir and has a valve body in which a pistonlike valve member is disposed axially displaceably in a bore counter to the force of a closing spring. The valve member forms an armature of an electromagnet, which is supplied with current to reinforce the closing force of the closing spring. The valve member acts on a closing element, which is pressed against a valve seat by the force of the closing spring and the magnetic force and which is acted upon on an other end by the pressure in the fuel reservoir. The valve member has two axially offset guide portions, which are embodied as short cylinder portions and have a diameter that is only slightly smaller than the diameter of the bore. By way of its guide portions, the valve member is guided displaceably with defined contact in the bore.

Abstract: A fuel supply unit includes a pump module in a fuel tank. The pump module has a cover member, a fuel pump, a fuel filter, and a suction filter. The fuel pump, the fuel filter and the suction filter are mounted on a lower portion of the cover member. Moreover, the fuel supply unit includes a chamber movably mounted to the pump module and disposed in a position to receive the suction filter for forming a fuel reservoir around the suction filter. The chamber has a suction pump for sucking fuel in the fuel tank to the fuel reservoir using fuel returned into the fuel tank. Furthermore, the fuel supply unit includes a spring between the pump module and the chamber. The spring biases the chamber toward a lower surface member of the fuel tank so as to maintain the chamber at the lower surface member of the fuel tank.

Abstract: A fuel pressure regulator is provided between the outlet of the fuel pump and an inlet of a jet pump to control the flow of fuel to the jet pump. Desirably, during low voltage conditions in a vehicle, the flow of fuel to the jet pump may be temporarily restricted or terminated to decrease the amount of fuel diverted from the engine and thereby increase the flow rate of fuel to the engine and improve the performance of the engine. The regulator may also function to bypass fuel delivered from the fuel pump in excess of the engine fuel demand to control the pressure of and limit the maximum pressure of fuel supplied to the engine.

Abstract: An automotive vehicle fluid jet pump 7 is provided including a first chamber 340 having a rear end 348 sealed from a front end 344 by a pressure communicative boundary 352. The first chamber front end 344 has an inlet 332 fluidly connected with a source of pressurized fluid. The first chamber front end 344 also has a nozzled outlet 372. A second chamber 376 is provided having a first inlet fluidly connected with the first chamber outlet 372. The second chamber 376 has a second inlet 380 fluidly connected with a sump. The second chamber has a delivery outlet 334. A valve member 400 is operatively associated with the first chamber boundary 352 for controlling a flow from the first chamber inlet 332 through said first chamber outlet 372. A position of the valve member 400 with respect to said first chamber outlet 372 is responsive to a pressure differential between the first chamber front end 344 and rear end 348.

Abstract: The invention concerns a fuel drawing device for a motor vehicle tank comprising a housing (100) bearing a drawing pump (190) and a filter (180) arranged on the pump (190) outlet conduit, characterized in that the filter is ring-shaped and is arranged in a chamber radially external to the housing (100) and the pump (190) is arranged in the filter (180) central space.

Abstract: A fuel delivery system having a fuel reservoir connected to a suction side of a pump, a fuel delivery line connected to an output side of the pump, a number of fuel injectors connected to the delivery line, and a return line from the injectors to the suction side of the pump. The pump has a housing, a pumping chamber within the housing, a driver rotor and a driven rotor within the pumping chamber, and an input shaft t the housing. The input shaft is arranged such that rotation of the input shaft effects rotation of the driver rotor. The driver rotor is caused to rotate by the input shaft via a magnetic coupling. The magnetic coupling is arranged to slip when a predetermined value of torque is applied across the coupling such that a maximum pressure value of about 12 bar is attained at the output side of the pump.

Abstract: A fuel tank (1) has an ejector pump (9) arranged inside it. This ejector pump (9) is preloaded against an inner wall (10) of the fuel tank (1) by means of a flexurally elastic supporting arm (8) and is thus fixed. This allows the ejector pump (9) to be inserted into the interior of the fuel tank (1) without problems through an opening (3) together with a fuel feed unit (4). This considerably simplifies the fitting of the ejector pump (9) and, in particular, there is no need for another fitting opening in the fuel tank (1) to enable the ejector pump (9) to be fixed.

Abstract: A reservoir for feeding module has a tubular cylinder part, and a bottom part joined to the tubular cylinder part, the tubular cylinder part and the bottom part having joining surfaces on which functional surfaces and feeding passages are formed.

Abstract: A fuel filter and pressure regulator assembly includes a housing, an inlet tube, an outlet and return tube each made of stainless steel. An annular filter element is disposed within the housing and abuts at one end a pressure regulator element which is mounted within an O-ring retainer that is fixed within the housing. A resilient device, such as a wave washer or O-ring, is compressed as the assembly is assembled. In operation, fuel flows in through the inlet tube which is radially offset at a first end of the housing and into an annular space around the annular filter element. The fuel then flows through the filter media and the filter element and out of the outlet tube which is aligned with a hollow core of the filter media. If fuel pressure is too high, the fuel then flows through the pressure regulator, out of the return tube and back to the fuel tank.

Abstract: A vehicle fuel system has an electronic control module received within a fuel tank to send data to and receive data from the electronic control unit (ECU) for the vehicle engine and other vehicle control systems, to provide an electronic control of the vehicle fuel system and to receive signals from one or more sensors mounted within the fuel tank which provide information about the operation of the fuel system. The fuel system integrates a plurality of components into the vehicle fuel tank to reduce the number of openings through the vehicle fuel tank and the number of external connections which must be made in assembly of the fuel system into a vehicle. By disposing a fuel vapor canister within the fuel tank, each vapor vent valve within the fuel tank can communicate completely within the tank with the vapor canister with a single outlet extending from the fuel tank to communicate fuel vapor from the canister with an intake manifold of the engine.

Abstract: A delivery device (2) for delivering fuel, having a delivery pump (3) and a fuel filter (7), has a bypass line (9) which is conducted past the fuel filter (7). When new, the delivery pump (3) delivers fuel through the fuel filter (7). After the fuel filter (7) has become clogged with dirt, the fuel is delivered by the bypass line (9) through a second fuel filter (10). By this means, pollution of the environment with fuel is kept particularly low.

Abstract: A fuel feed device in a motorcycle fuel injection device has excellent normal travel operation and hot restart property after high speed travel. A fuel case A has a fuel introduction chamber 4 to which a fuel introduction passage 6 is opened, a pump receiving chamber 5 for receiving a fuel pump P and a filter 9 on a longitudinal axis X—X and further has a fuel discharge passage 11 and a fuel discharge chamber 8 to which the fuel introduction passage 17 is opened. The longitudinal axis X—X is arranged substantially in a vertical direction. The fuel introduction chamber 4 of the fuel case A is disposed below a bottom surface Ta of a fuel reservoir T.

Abstract: A fuel supply device is provided for use with a fuel tank. The device comprises a mounting bracket suspended into the fuel tank. A fuel pump is mounted to the mounting bracket to pump fuel from the fuel tank to the outside of the fuel tank. A pressure regulator is mounted to the mounting bracket to regulate the pressure of the fuel led to the outside of the fuel tank from the fuel pump. A fuel return passage is defined by the mounting bracket, through which a part of the fuel pumped out from the fuel pump is led back into the fuel tank under operation of the pressure regulator. First and second suction pumps are mounted to the mounting bracket and sucks fuel from first and second given portions of the fuel tank by using a power possessed by the fuel flowing in the fuel return passage. First and second passages extend from the fuel return passage to the first and second suction pumps respectively to apply the fuel from the fuel return passage to the pumps to drive the same independently.

Abstract: The fuel system includes a fuel tank for supplying fuel to a fuel rail having fuel injectors and a fuel pressure regulator for regulating the pressure of the fuel supplied to the fuel rail to a predetermined pressure. The pressure regulator includes a spring-biased ball movable toward and away from a valve seat with an intervening flow channel director. The flow channel director is sized to provide a substantially constant regulated pressure over a flow range typical for automotive engine use, i.e., a pressure of 350-430 kPa over a flow range of 20-50 kg/hr. The pressure regulator provides the predetermined regulated pressure without a movable diaphragm dividing the regulator into flow and non-flow chambers on opposite sides of the diaphragm.

Abstract: A high-pressure fuel pump device which can facilitate the assembly of a high-pressure pump and a high-pressure regulator by standardizing a pump body or a valve housing. The pump body of the high-pressure pump has a high-pressure valve connection portion on the exterior side including a high-pressure passage which is used to connect the high-pressure regulator, the valve housing of the high-pressure regulator has a high-pressure pump connection portion on the exterior side including a high-pressure passage which is used to connect the high-pressure pump, and the high-pressure valve connection portion and the high-pressure pump connection portion are connected to each other to assemble the high-pressure pump and the high-pressure regulator together.

Abstract: A recirculating valve for the fuel system of an internal combustion engine includes a valve body with a fuel supply passage and a fuel return passage. An air separation chamber and a restricted orifice are provided in the fuel return passage. A pressure valve allows excess heated return fuel in the air separation chamber to recirculate with the fuel in the fuel supply passage. The valve also directs return air back to the tank and prevents the air from passing to the engine. A thermal actuator maintains the pressure valve in a closed condition when the fuel increases above a predetermined temperature. A relief valve can be provided in the fuel return outlet port to allow fuel to easily pass back to tank during normal operating conditions.

Abstract: A fuel supply device for an internal combustion engine of a motor vehicle has a supply container, a feeding aggregate which is electric-motor driven and feeds fuel from the supply container to an injection device of the internal combustion engine, a pressure sensor which determines a fuel pressure downstream of the feeding aggregate, a control device connected with the pressure sensor and controlling an operation of the feeding aggregate so that a fuel pressure is at least approximately below a nominal pressure, a throttled discharge arranged downstream of the feeding aggregate, a valve device operative for controlling the discharge depending on a fuel pressure and opening the discharge when a fuel pressure located under the nominal pressure is exceeded, and a check valve integrated in the feeding aggregate.

Abstract: To feed stably fuel through a fuel injection valve for a long period of time and to stabilize pressure controlling characteristics of a fuel pressure controlling valve for a long period of time, a fuel case is partitioned into and formed by a fuel introduction chamber, a pump receiving chamber and a fuel discharge chamber. A fuel pump is received in the pump receiving chamber, an intake passage thereof communicates to the fuel introduction chamber and a discharge passage is directly opened to a filter received in fuel discharge chamber. The fuel discharged from the fuel pump is fed into the filter from the discharge passage and the fuel from which foreign matter has been removed through the filter is fed into the fuel discharge chamber. The clean fuel within the fuel discharge chamber is fed from a fuel discharge passage to a fuel distribution pipe and fed from a fuel introduction passage to the fuel chamber of the pressure controlling valve.

Abstract: A fuel system including first and second tank portions communicating with each other such that the first and second tank portions have a substantially equal vapor pressure, first and second fuel pumps in the first and second tank portions, respectively, and a crossover fuel line for transferring fuel in either direction between the first and second tank portions, the direction of transfer depending on the relative level of fuel in the first and second tank portions. Respective first and second shuttle valves control the direction of fuel flow through the single crossover line to maintain substantially equal fuel levels in both bifurcated portions until the tank is empty. First and second jet pumps communicate with the crossover fuel line and provide the suction needed for fuel transfer.

Abstract: A no-return system for supplying fuel from a tank to a fuel injected internal combustion engine of an automotive vehicle in response to the fuel demand of the engine. The pump supplies more fuel than that required by the operating engine and the excess fuel is diverted from the engine by a bypass fuel pressure regulator and returned to the tank through a fluid-activatable switch movable to electrically open and closed states in response to the rate of flow of excess fuel through the switch. An electric control circuit is responsive to the state of the switch to change the magnitude of the power applied to the electric motor to change its operating speed and thereby modulate the output fuel flow rate of the pump in response to the fuel demand of the engine.

Abstract: A fuel supply system for fuel supply of an internal combustion engine has a fuel supply container, a fuel supply unit having a pressure limiting valve providing an adjustable maximum pressure, a fuel supply conduit having a pressure regulating valve adjustable to an operational pressure for maintaining a regulated operational pressure in the fuel supply conduit, a fuel return conduit adapted to connect the internal combustion engine with the fuel supply container, and a delay valve associated with the pressure regulating valve for loading the fuel supply conduit with an initial pressure which is higher than an operational pressure.

Abstract: A fuel supply system for a motor vehicle has two feed units arranged in a fuel tank. The feed units in each case feed fuel out of baffles to an internal combustion engine of the motor vehicle and to suction jet pumps. This ensures a reliable supply of fuel to the internal combustion engine, even in the case of a very high fuel requirement and in the case of an angled design of the fuel tank.

Abstract: For each cylinder of the internal combustion engine, the fuel injection system has one fuel pump, one fuel injection valve, and one line connecting the fuel injection valve to the fuel pump. To control the injection, a first electrically triggerable control valve is disposed on the fuel pump, by which valve a communication of the high- pressure side of the fuel pump with a relief chamber is controlled. The onset of fuel injection is determined by the closing time of the first control valve, by which the high-pressure side is disconnected from the relief chamber. Near the fuel injection valve, a second electrically triggerable control valve is disposed, by which a communication of the fuel volume, located in the fuel injection valve, with a relief chamber is controlled. The end of the fuel injection is determined by the opening time of the second control valve, and as a result rapid relief of the fuel volume located in the fuel injection valve and thus rapid closure of the fuel injection valve are achieved.

Abstract: A control method for controlling the fuel pressure within the common rail or accumulator of a fuel system whilst an associated engine is operating, the fuel system including a plurality of individually actuable fuel injectors arranged to receive fuel from the common rail, each injector including a control valve operable to control the fuel pressure within a control chamber, fuel escaping from the control chamber being returned to a fuel reservoir, the method comprising: monitoring the fuel pressure within the common rail; controlling the rate of fuel supply to the common rail; and relieving the common rail fuel pressure in the event that the common rail fuel pressure exceeds a predetermined threshold by actuating the control valve of at least one of the injectors to allow fuel to flow from the common rail, through the control chamber of the injector to the fuel reservoir, the control valve(s) being arranged to control the fuel pressure within the control chamber(s) of the said at least one of the injectors

Abstract: The device for conveying fuel from a fuel tank (10) to an engine (18) of a motor vehicle has a conveying unit (14), communicating on the intake side with the fuel tank (10) and, on the pressurized side, with the engine (18), and a return line (22), which leads to a jet pump (24), located near a tank bottom (11), that pumps excess fuel via a mixing region into a reserve pot (12), from which the conveying unit (14) draws fuel. According to the invention a siphon-like mixing region (29) is provided between the reserve pot (12) and the tank bottom (11). An opening (32) or a filter element (48) is provided in a transitional region (31) of the mixing region (29) to the reserve pot (12). The opening (32) or filter element (48) which extends parallel to the tank bottom is closable by an axially movable closing element (44,51) so that a fuel flow can occur into the reserve pot (12) but not back from the reserve pot (12) into the mixing region (29).

Abstract: A device for feeding fuel from a supply container to an internal combustion engine of a motor vehicle has a supply container, a collecting cup arranged in the supply container, a fuel feeding pump which aspirates fuel from the collecting cup, a feeding conduit into which the aspirated fuel is fed to the internal combustion engine, a return conduit through which a fuel is returned back to said supply container, a jet pump arranged in the supply container and having a jet nozzle connected with the return conduit, a mixing pipe which is open in the collecting cup and is substantially in alignment with the jet nozzle, a suction opening provided between the jet nozzle and the mixing pipe, a check valve flap arranged in the collecting cup and closing an outlet of the mixing pipe, the check valve flap being formed so that it deviates a filling jet of the jet pump which is supplied from fuel from the supply container into the suction cup against a fuel pressure in the suction cup, from the outlet of the mixing pipe.

Abstract: A fuel supply system is provided with a static discharge circuit (30) placed on the surface of a cover (3) fitted in the opening (2a) of a fuel tank (2) and used to discharge the static electricity generated because of the intense friction between fuel and the filter element (5a) of a fuel filter (5) when the fuel passes through the filter element (5a). The static discharge circuit (30) is fitted with output terminals (38c) so arranged as to externally output an operation confirming signal for an operation confirming display lamp (37) by making use of a pulse signal at the time of charging-discharging. Therefore, the static electricity can surely be discharged and a decrease in the amount of fuel supply to and engine can also be recognized beforehand by detecting the fact that the filter element (5a) is clogged with foreign matter and/or the malfunctioning of a fuel pump (4) occurs.

Abstract: A fuel tank assembly for a motorcycle and a method for assembly thereof, in which a fuel pump can reliably suck in fuel when a fuel level fluctuates in response to acceleration, deceleration or changing posture of the motorcycle, and when there is little fuel in the tank. The invention provides a cup disposed on the bottom of the fuel tank which may house a fuel pump and a fuel suction filter. Because the fuel suction filter is mounted within the cup, it is not necessary to pass the filter through a hole in the bottom of the tank during assembly. This allows the use of a large filter without forming a large hole in the tank, and further increases the fuel capacity of the tank. A peripheral edge of the tank opening hinders the flow of fuel from the cup to the tank during changes in motorcycle posture, which maintains the fuel suction filter's submergence in fuel.

Abstract: A fuel delivery system for a boat having an internal combustion engine is provided. The system provides a source of fuel. A fuel supply conduit is connected to the source of fuel to deliver fuel to the engine. A fuel impermeable housing has one end coupled to the source of fuel and defines a passageway that receives the fuel supply conduit interiorly of the boat. The passageway is hermetically sealed relative to the interior of the boat and provides a return path into the fuel source to any fuel that may spill in the passageway.

Abstract: A pressure control valve for a fuel injection apparatus for internal combustion engines, including a housing with a high-pressure connection and a return connection and including a cup-shaped piston, which is disposed in a housing bore, can be moved axially between a valve seat oriented toward the high-pressure connection and a stop oriented toward the return connection, counter to the spring force of a spring acting in the direction of the valve seat, and has at least one through opening that connects the inside of the cup-shaped piston to the housing bore, is characterized in that at least one throttle element is disposed upstream and/or downstream of the valve seat in the flow direction of the fuel.

Abstract: A control valve for the fuel return in an injection line in internal combustion engines, which has a valve tappet which is arranged in a longitudinally displaceable manner and which exposes larger valve cross sections as the opening stroke increases and can be actuated against the restoring force of a valve spring by an electric magnet coil. The opening stroke and hence the valve cross section can be adjusted by a spring assembly having at least two actuating springs which can be deflected in the axial direction of the valve tappet and are arranged in parallel and in such a way that they can be subjected to force in an axially offset manner with the result that different resultant spring forces counteract the actuating movement in successive sections of the spring travel.

Abstract: A two-stage marine fuel pump (10). A first pump stage (S1) has a fuel inlet (24) and a fuel outlet (26). A second pump stage (S2) has a separate fuel inlet (28) and fuel outlet (30). Each pump stage is stand alone such that while the outlet of the first pump stage can be routed to the inlet of the second pump stage, the pump can be otherwise configured. In these other configurations, there is one path for routing fuel to the fuel inlet of the first pump stage and from the outlet thereof, and a separate path for routing fuel to the inlet of the second pump stage and from the outlet thereof. In these alternate configurations fuel pumped from the first stage of the pump is delivered other than to the fuel inlet of the second pump stage, and fuel supplied to the inlet of the second pump stage is delivered other than from the fuel outlet of the first pump stage.

Abstract: A drive unit for driving a fuel pump for a small-sized vehicle, which is capable of reducing the current consumption of the fuel pump. A drive unit includes an ECU for controlling the fuel injection amount of a fuel injector. The ECU drives the fuel pump on the basis of control data for controlling the fuel injection amount of the fuel injector and of a power supply voltage of the fuel pump. For example, the fuel pump is driven under pulse-width modulation (PWM) in such a manner that a pulse-width of a PWM signal is made larger with an increase in the fuel injection amount of the fuel injector and is made smaller with a decrease in the fuel injection amount of the fuel injector.

Abstract: In a fuel supply system for diesel engines, which comprises a fluidic series connection of a fuel pump (5) sucking out of a tank (1), of a fuel filter (7) and of a high-pressure pump (9), a parallel connection, located downstream of the high-pressure outlet (14) of the high-pressure pump (9), of a plurality of injectors (16) or injection nozzles and of an electrically controllable high-pressure regulating valve (17) with a return line (20), said parallel connection being capable of being fed by the high-pressure pump with a fuel stream under a pressure which is variable, as required, by the activation of the high-pressure regulating valve, at least one return line (18) for recirculating a fuel excess from the high-pressure regulating valve and/or the injectors into the tank (1), and at least one cooler (19, 21) arranged in a return line, according to the invention a first return line (18) is located downstream of the injectors (16) and a second return line (20) downstream of the high-pressure regulating v

Abstract: A secondary fuel pump assembly for a fuel tank in a vehicle includes a reservoir adapted to be disposed in the fuel tank having a top defining an overflow fuel level of the reservoir. The secondary fuel pump assembly also includes a conduit conducting return fuel from an engine of the vehicle to the reservoir and a jet pump having a discharge outlet in the reservoir and an inlet operatively connected to the conduit. The secondary fuel pump assembly includes an overflow fuel member defining a flow path for overflow of fuel in the reservoir and a guide member extending into the overflow fuel member and having at least one aperture extending therethough. The secondary fuel pump assembly further includes a guide disposed over the guide member and movable relative thereto to open and close the at least one aperture and a float connected to the guide to move the guide as a fuel level rises and falls in the reservoir.

Abstract: A pressure limiting valve for the fuel return line connected to a tank of a motor vehicle is positioned in a flange which connects the fuel return line to the tank. The pressure limiting valve closes an outlet opening which branches off from a fuel passage of the flange.

Abstract: A high-pressure fuel supply assembly includes a high-pressure fuel pump for pressurizing fuel from a low-pressure fuel intake passage and discharging high-pressure fuel into a high-pressure fuel discharge passage, a high-pressure damper disposed in the high-pressure fuel discharge passage for absorbing surges in the high-pressure fuel, a high-pressure regulator disposed in a branch passage branching from a branch portion of the high-pressure fuel discharge passage for adjusting the high-pressure fuel from the high-pressure damper to a predetermined pressure, and an orifice disposed in the high-pressure fuel discharge passage downstream from the branch portion for absorbing surges in the high-pressure fuel.

Abstract: A fuel system, particularly a diesel fuel system for a car engine (12), includes a fuel filter (11). The filter (11) has an air outlet (18, 22) spanned by an oleophobic filter medium (26). This allows significant volumes of air to be vented while not wetting out when contacted by fuel and so allowing only very small quantites of fuel to pass the filter medium (26).

Abstract: Apparatus for condensing return fuel in a fuel tank. The condenser comprises an elongated body having a passage therethrough in fluid communication with a fuel return line. A plurality of vent holes are spaced along the length of the body and communicated with the passage. The vent holes are sloped along the length of the passage so that gaseous fuel will tend to first exit vent holes toward a distal end of the passage. Both single and multiple passage condensers are disclosed.

Abstract: A liquid filter (1) with a built-in pressure regulator (11) for fuel is proposed, in which the pressure regulator (11) with its diaphragm (32) is mounted on the inside of a cap (14) that has the inflow connector (16) and the tank connector (17). The diaphragm (32), which experiences a flow on its inside, is acted upon by the pressure of the fuel on the clean side (25) of the filter element (21), and the flow through the filter element is radially from the outside inward. Integrating the pressure regulator (11) in the cap enables a simple, compact, economical design of the liquid filter (10), through whose valve (36) in the pressure regulator (11) only cleaned fuel flows.