Abstract: A switch-mode power supply waste heat recovery and utilization system includes a switch-mode power supply unit, an air conditioner and a water storage tank that are all connected with pipes. The switch-mode power supply unit, the air conditioner and the water storage tank are in communication with each other through the pipes. The switch-mode power supply unit includes a cabinet. Fixed plates are fixedly connected to an inner side wall of the cabinet and arranged at equal intervals. A top and a bottom of the cabinet and respective interiors of the fixed plates are formed with cavities. The pipes are in communication with the cavities. A fan is fixedly connected to a side wall of the water storage tank, and is matched with the water storage tank. A filter screen is insertedly connected to an inner side wall of the water storage tank. A filter cotton is horizontally provided under the filter screen.

Abstract: A depressurizing device includes a valve base, a first valve, a flexible member, and a top cover. The valve base has a pressure chamber and an outgassing chamber. Top and bottom surfaces of the pressure chamber have an opening and a first valve port respectively. The first valve is located in the pressure chamber and covers the first valve port. The flexible member is disposed on the valve base and has a depressurizing valve and a first outgassing port, the depressurizing valve covers the opening, and the first outgassing port is communicated with the outgassing chamber. A first outgassing channel is at least formed on the flexible member and communicates the pressure chamber to the outside of the valve base. The top cover is disposed on the flexible member and has a first depressurizing port and a second outgassing port.

Abstract: An in-tank fuel pump assembly and mounting system is disclosed which may be configured for mounting inside a fuel tank. The assembly includes a pump housing, pump mounted to the housing, and pressure relief valve. The housing may comprise upper and lower pump housing units coupled together. The upper housing unit is configured for mounting to a tank opening, which in one implementation may be the fuel fill opening. The lower housing unit extends into the tank to approximately the bottom of the tank. A fuel fill fluid pathway is created through the housing for adding fuel to the tank while the pump assembly remains in situ. The upper housing unit may include a removable fuel cap. The pump housing may include an integral vapor trap.

Abstract: A recirculation module for a fuel prefilter unit of a combustion engine has a temperature-controlled actuating element that transfers the recirculation module, based on a filter raw side feed temperature of the fuel, from a cold start state into a normal operating state and back. In cold start state, an engine return line from the combustion engine to the recirculation module is in fluid communication with a filter element raw side of the fuel prefilter unit and the engine return line is separated in regard to fluid communication from a tank return line of the combustion engine. In normal operating state, the engine return line is separated in regard to fluid communication from the filter element raw side and is in fluid communication with the tank return line. A check valve prevents return flow of fuel from the tank return line into the engine return line.

Abstract: A fluid-conveying device for conveying a fluid from a tank includes: a first fluid-conveying pump; a swirl pot; and a second fluid-conveying pump having a drive region and a conveying region coupled to the drive region. The fluid is conveyable from the swirl pot by the first fluid-conveying pump, and the conveying region is configured and arranged so as to be drivable by the drive region.

Abstract: A valve device for a fuel filter module has a first fluid channel through which fuel flows only in recirculation mode of the fuel filter module and a second fluid channel through which fuel flows only outside of the recirculation mode. The first fluid channel extends inside the second fluid channel. The first and second fluid channels are coaxial to each other. A fuel filter module switchable into recirculation mode and out of recirculation mode is provided with a control valve that has a valve bore and a valve device arranged in the valve bore, wherein the valve device has a first fluid channel through which fuel flows only in recirculation mode and a second fluid channel through which fuel flows only outside of the recirculation mode. The first fluid channel extends inside the second fluid channel, and the first and second fluid channels are coaxial to each other.

Abstract: A fuel ejector assembly for a vehicle. A second fluid passage extends into a first fluid passage so that a nozzle opening is arranged inside the first fluid passage facing an outlet flow port such that a first flow of fuel in the first fluid passage flows around the nozzle opening. A flow shape unit is disposed within the first fluid passage in connection to the nozzle opening.

Abstract: A supply system for supplying a turbomachine with fluid. The supply system includes at least one centrifugal pump and a fluid recirculation branch. The fluid recirculation branch includes an inlet situated downstream of the centrifugal pump and an outlet situated upstream of the centrifugal pump or fluidically connected with a node situated upstream of the centrifugal pump, in such a way that at least one portion of the fluid circulates in the centrifugal pump. The fluid recirculation branch includes a valve situated between the inlet and the outlet, the valve including a shutter configured to open/close as a function of the temperature of the fluid.

Abstract: A flow control valve includes a membrane which has at least one opening for the flow of a fluid and an annular body which has a flow contact surface and at least one flow opening. The flow opening is in flow connection with the at least one opening in the membrane. The membrane is constructed to be bendable in a direction towards the flow contact surface.

Abstract: A method and device are disclosed for fuel-detection by a fuel sending unit by placing a fuel sending unit in a first position from a second position, and releasing the fuel sending unit from the first position such that a buoyancy characteristic of a fuel sending unit float prompts the fuel sending unit to the second position. A rate-of-travel of the fuel sending unit is sensed from the first position to the second position to produce fluid travel data, wherein the rate-of-travel being affected by a fuel density. Fluid-type identification data may be generated based on the fluid travel data.

Abstract: A depressurizing device includes a valve base, a first valve, a flexible member, and a top cover. The valve base has a pressure chamber and an outgassing chamber. Top and bottom surfaces of the pressure chamber have an opening and a first valve port respectively. The first valve is located in the pressure chamber and covers the first valve port. The flexible member is disposed on the valve base and has a depressurizing valve and a first outgassing port, the depressurizing valve covers the opening, and the first outgassing port is communicated with the outgassing chamber. A first outgassing channel is at least formed on the flexible member and communicates the pressure chamber to the outside of the valve base. The top cover is disposed on the flexible member and has a first depressurizing port and a second outgassing port.

Abstract: A pulsation damper for a fuel pump having a pump body in which a fuel passage is defined includes: a diaphragm that is elastically deformed in a predetermined direction by receiving a pressure of fuel; a casing part including a housing chamber that houses the diaphragm; and an attachment to be attached to the pump body. The attachment includes a communication passage that makes the housing chamber to communicate with the fuel passage. The attachment has a length in a perpendicular direction perpendicular to the predetermined direction, and the length of the attachment is smaller than a length of the casing part in the perpendicular direction.

Abstract: A fuel system for an internal combustion engine is provided, which comprises a first fuel tank, a fuel filter device, arranged between a low pressure pump operated by an electric motor and a high pressure pump, a first fuel conduit, through which the low pressure pump is arranged to supply fuel to the fuel filter device, and a control device, arranged in connection with an electric motor operating the low pressure pump. An overflow conduit is arranged in connection with a deaeration outlet, arranged in the fuel filter device and the first fuel tank, and the control device is arranged to control the electric motor, in such a way that the low pressure pump is active when the internal combustion engine is turned off for a limited period, whereby fuel may flow from the fuel filter device via the deaeration outlet and the overflow conduit, back to the first fuel tank.

Abstract: A filtration assembly filters diesel fuel used by a diesel engine and includes a filter element disposed within a housing. The housing includes an unfiltered fuel inlet and a filtered fuel outlet. The filter element disposed within the housing receives fuel from the fuel inlet. The filter element defines a peripheral wall sealably engaging filter media defining an unfiltered side and a filtered side of the filter element. The unfiltered side is enclosed with an impermeable barrier affixed to the peripheral wall and the filtered side is enclosed with a permeable water diffuser through which filtered fuel passes. A water separator assembly is disposed externally to the filter element receiving filtered fuel from the water diffuser. The water separator assembly includes water separator media preventing water from passing into the separator. The separator assembly interconnects to the filtered fuel outlet providing filtered, dewatered diesel fuel to the diesel engine.

Abstract: A vehicle including a pressurized liquid fuel system includes a first pressurized liquid fuel tank arrangement, a second pressurized liquid feel tank arrangement, and a balancing conduit open to a first fuel tank and to a second fuel tank at least one of above a maximum liquid level of the first fuel tank and a maximum liquid level of the second fuel tank and below a minimum liquid level of the first fuel tank and a minimum liquid level of the second fuel tank. A first return line and a second return Sine to the first and second fuel tanks are configured such that a pressure drop across the first, return line from a pressurized liquid fuel circulation system to the first fuel tank is adapted to be the same as a pressure drop across the second return line from the pressurized liquid fuel circulation system to the second fuel tank. Methods for operating a pressurized liquid fuel system are also disclosed.

Abstract: The present invention discloses an operating fluid container (10) made of thermoplastic material for a motor vehicle and a method for equipping an operating fluid container with a stiffening element (20).

Abstract: Methods and systems are provided for cooling a high pressure fuel pump. One method includes, when a spill valve is in a pass-through state, circulating fuel from a compression chamber of the high pressure fuel pump to a step room of the high pressure fuel pump. The fuel circulation through the step room may provide for a reduction in fuel temperature in the step room, and thus, the high pressure fuel pump.

Abstract: A fuel water separator filter is described that is configured as a filter-in-filter construction with multiple water separating layers to separate water from the fuel. The fuel water separator filter is configured for use on a suction side of a fuel pump, and includes a neck with a radially outward facing seal that in use seals with the filter housing. The filter housing is formed with an isolated water sump that in use is isolated from water that is stripped from the fuel by the first stage of the outer filter. The isolated water sump is formed by a wall within the housing, instead of relying on an outer diameter seal on the filter to form the water sump.

Abstract: A fuel supply system includes a fuel pump having an inlet configured to pick up fuel and an outlet configured to discharge fuel. A pressure vessel is in fluid communication with the outlet of the fuel pump such that fuel is directed from the fuel pump into the pressure vessel, the pressure vessel having an outlet port. A pressure regulation valve subassembly is detachably coupled with the outlet port via a male-female interface that positively locks against axial separation upon axial coupling in a first orientation and relative rotation of less than 360 degrees to a second orientation. A reservoir defines an internal space at least partially receiving the fuel pump, the pressure vessel, and the pressure regulation valve subassembly. The reservoir includes an interior wall that obstructs rotation of the pressure regulation valve subassembly from the second orientation to the first orientation.

Abstract: An annular filter element, including: a filter medium having circumferentially closed about an axis and extended along the axis, the axis defining an axial direction; wherein the filter medium has a radially outer flow face and a radially inner flow face, the radially inner flow face surrounding an inner clean space in the filter element; wherein the filter element is through-flowable radially from a radial outside to a radial inside of the filter element; a water separation screen inserted into the clean space, the water separation screen formed separately from the filter element, the water separation screen connected to the filter element or to a component situated at the filter element.

Abstract: The invention proposes a method and an emulsifying apparatus for the operation of a diesel engine with a water-diesel fuel emulsion, wherein the water fraction is varied as a function of the engine operating point and/or the emulsifying apparatus and/or parts of the injection line are flushed with pure diesel fuel upon a shutdown of the engine.

Abstract: A fuel supply system includes a feeder fuel circuit configured to: (i) convey a first fuel in a direction of a mixing tank via a first pump device proceeding from a first fuel tank for a first fuel type; or (ii) convey a second fuel in the direction of the mixing tank via the first pump device proceeding from a second fuel tank for a second fuel type; and a booster fuel circuit configured to convey fuel via a second pump device proceeding from the mixing tank in a direction of at least one marine diesel engine, the booster fuel circuit having an automatic fine filter positioned upstream of or downstream of the at least one marine diesel engine and in the booster fuel circuit, respectively.

Abstract: A method for operating a dual-fuel engine. Embodiments include receiving sensor input information, including information representative of a temperature of the engine. A first fuel, optionally diesel fuel, and a second fuel that is different than the first fuel, optionally natural gas, are supplied to the engine during a start mode when the engine temperature is below a normal operating temperature range. The first and second fuels can be supplied to the engine during a run mode when the engine temperature is within the normal operating temperature range.

Abstract: Methods and systems are provided for cooling a high pressure fuel pump. One method includes, when a spill valve is in a pass-through state, circulating fuel from a compression chamber of the high pressure fuel pump to a step room of the high pressure fuel pump. The fuel circulation through the step room may provide for a reduction in fuel temperature in the step room, and thus, the high pressure fuel pump.

Abstract: An engine includes a crank chamber in which pressure fluctuation occurs and a carburetor including a diaphragm fuel pump. The diaphragm fuel pump includes a pump chamber configured to suck in and eject fuel and a diaphragm chamber to which a pressure that drives the pump chamber is supplied. The diaphragm chamber and the crank chamber communicate with one another in a state in which a negative pressure is created in the crank chamber.

Abstract: Provided is a fuel pump module for supplying diesel fuel. The fuel pump module in accordance with exemplary embodiments of the present invention is configured to include a flange assembly fixed to an inlet of a fuel tank and a reservoir body assembly disposed in the fuel tank, wherein the reservoir body assembly includes: a filter that removes foreign objects included in the diesel fuel; a fuel pump that forcibly circulates the diesel fuel passing through the filter to a diesel engine; and a pump connection return passage that supplies fuel toward a diesel engine through a supply line of fuel but supplies the diesel fuel that is returned without being consumed by the diesel engine between the filter and the fuel pump to supply the fuel to the fuel pump without passing through the filter.

Abstract: A fluid flow network for feeding fuel to at least one engine (2) of a power plant driving rotation of at least one rotary wing (1) of a rotorcraft. The fluid flow network includes a suction pump (3) for sucking fuel from a feeder tank (5) via a transfer circuit (4). The feeder tank (5) is fed with fuel from a main tank (9) by a transfer circuit (10) including a transfer pump (12). The transfer pump (12) is also a pump for priming the suction pump (3) by means of a feed ejector (15) provided on the feed circuit (4) and immersed in the feeder tank (5).

Abstract: A device for providing a liquid reducing agent includes a tank having an interior space, a vessel at least partly disposed in the inner space of the tank, the vessel being at least partly surrounded by a particle screen through which a liquid can flow, and a delivery unit located in the vessel and configured for delivering reducing agent from the tank, through the particle screen and then out to a take-off or delivery point for reducing agent.

Abstract: An engine includes: a piston; a carburetor having a diaphragm fuel pump, the diaphragm fuel pump including a pump chamber configured to suck and discharge fuel and a diaphragm chamber to which a pressure to drive the pump chamber is applied; and a communicating passage configured to connect between the diaphragm chamber and a negative pressure part in which a negative pressure is created due to movement of the piston. A flowback prevention part is formed in the communicating passage to allow fluid to move only in on direction from the diaphragm chamber to the negative pressure part.

Abstract: A high pressure fuel pump for use with an internal combustion engine and a method of operation of a high pressure fuel pump are disclosed. The high pressure fuel pump may include a supply chamber and a pump chamber separated by a passage in sealing arrangement with a disk. The disk may have one or more holes therethrough and be rotatable in order to place the holes in the disk in varying degrees of alignment with the passage to allow respective, varying amounts of fuel to flow through the passage.

Abstract: For a pressure relief device of an injection system of an internal combustion engine, for an injection system of an internal combustion engine having a pressure relief device and in a pressure relief method of an injection system of an internal combustion engine, a defined fuel pressure of the injection system is reduced to a defined fuel residual pressure upon exceeding a pressure limit above a defined fuel pressure, permitting emergency operation of the internal combustion engine.

Abstract: A diesel fuel feed system comprises a diesel engine (100); a fuel cooler (102); a fuel tank (106); and a makeup valve (104).

Abstract: The present invention relates to a fuel metering device for a fuel injection system for internal combustion engines having a plastic housing. According to the invention, the fuel metering device includes a control valve having a valve piston which is actuated by an actuating device. Furthermore, the plastic housing can be produced by spray-coating.

Abstract: A fuel feed system which causes liquid fuel to evaporate so as to feed gaseous fuel, provided with an evaporator which includes a heater which heats the liquid fuel to vaporize it and an electric heater which adjusts the temperature of the heater. The heater has a heat conduction surface which supplies heat to the liquid fuel. A difference between the temperature of the heat conduction surface of the heater and the boiling point of the fuel at the evaporator is used as the basis to change the temperature of the heater and adjust the heat flux at the heat conduction surface.

Abstract: In a fuel supply system for heavy oil common-rail injection systems for internal combustion engines, including a tank (1), a primary feed pump (3) for delivering heavy oil from the tank (1) to a high-pressure pump (5), wherein the high-pressure pump (5), via at least one high-pressure line (12), is connected to a high-pressure accumulator (rail) (6) feeding at least one injector (8), and, furthermore, a purge valve (9), which is connected to the high-pressure accumulator via a separate high-pressure line (15) for directing at least a portion of the heavy oil back into the tank (1) via a return line, the purge valve (9) includes a valve member (28) which is movable between an opened and a closed position, a high-pressure connection for a high-pressure line (15) communicating with a heavy oil high-pressure accumulator (rail) (6), a low-pressure connection for a return line, and actuating means for actuating the valve member (28), wherein the valve seat (29) of the valve member (28) is designed as a sliding seat

Abstract: A generator including an enclosure, an internal combustion engine provided within the enclosure, an alternator provided within the enclosure and driven by the internal combustion engine, a fuel supply line for providing fuel to the internal combustion engine, a valve for selectively closing the fuel supply line, the valve biased to a normally closed position, a controller configured to provide a signal to maintain the valve in an open position, and a temperature responsive device configured to interrupt the signal from the controller to the valve upon exposure to a threshold temperature, thereby resulting in the closing of the valve.

Abstract: A pressure control device controls a pressure of fuel supplied from a fuel tank to an engine via a fuel pump. The pressure control device includes a valve device, a first force-applying device and a second force-applying device. The valve device is provided in a path of the fuel from the fuel pump to the engine and comprising a valve and a spring. The valve is movable in an opening direction and a closing direction for permitting and preventing flow of the fuel from the fuel pump to the engine, respectively. The spring applies a first force to the valve in the closing direction. The first force-applying device is operable to apply a second force to the valve in the opening direction depending on the pressure of the fuel supplied from the fuel pump.

Abstract: A fluid pressure regulating device is i) provided with a pressure regulating member that forms a pressure regulating chamber inside a housing having introduction side and discharge side fuel passages, and communicates these passages according to introduced fuel pressure, and ii) is able to regulate the fuel pressure introduced into a fuel passage to a set pressure. The housing is provided with outer and inner annular valve seat portions that separate the fuel passages inside the pressure regulating chamber, and form another fuel passage inside the pressure regulating chamber. Different clearances are set between the pressure regulating member, and the outer annular valve seat portion and the inner annular valve seat portion, such that when the pressure regulating member abuts against one of the valve seat portions, a small gap is formed between the other valve seat portion and the pressure regulating member.

Abstract: A zero-governor fitting structure for a gas engine, configured in such a manner that the lower half of a fuel tank for a gasoline engine is utilized as a support box for supporting the zero-governor in which a gas supply inlet pipe and a zero governor can be reliably mounted with vibration and heating of the zero-governor avoided. A zero-governor mounting structure for a gas engine equipped with a zero-governor is provided with a support box fixed to the upper part of the gas engine. The support box is formed as a box having two depths. The zero-governor is supported, through a vibration insulation gasket, on the bottom plate of the shallower depth space of the support box. A gas supply inlet pipe and an elbow joint which is connected to the gas supply inlet pipe and can be bent the direction of the gas flow at a right angle toward the zero-governor are received in the deeper depth space, and the elbow joint is connected to the bottom inlet of the zero-governor.

Abstract: An internal combustion engine has a fuel system that has a fuel valve with a housing, wherein in the housing a fuel chamber is formed. A fuel pump pumps fuel from a fuel tank into the fuel chamber. A conveying pump provides forced conveyance of fuel into the fuel system. A feed line is connected to the fuel chamber of the fuel valve. The conveying pump is arranged in the feed line and supplies fuel to the fuel chamber. A relief line is connected to the fuel chamber of the fuel valve and a first valve is arranged in the relief line.

Abstract: A fuel reforming catalyst is installed in an internal combustion engine, the catalyst generating a combustible gas from a reforming fuel by using heat of the exhaust gas. In the reforming control, the combustible gas generated by action of the fuel reforming catalyst is refluxed into the intake system. An ECU varies a lower limit temperature of the reforming control depending on a mixture ratio of a gasoline and an ethanol in the reforming fuel. If the temperature of the fuel reforming catalyst is lower than the lower limit temperature, the ECU suspends the injection of the reforming fuel. The device can enlarge a temperature range to perform reforming control as much as possible, and perform the reforming control under suitable temperature conditions.

Abstract: A diesel fuel feed system comprises a diesel engine (100); a fuel cooler (102); a fuel tank (106); and a makeup valve (104).

Abstract: An oil strainer includes a body member which includes a circumferential wall projecting in a first (downward) direction toward an oil pan, and a cover member covering an inside space surrounded by the circumferential wall, and including a suction hole to suck an oil from the oil pan. The body member further includes a communication hole opened into the inside space surrounded by the circumferential wall and adapted to lead to the inlet side of an oil pump, and a discharge hole opened into the inside spaces, and adapted to receive the oil discharged from a pressure regulating valve. The body member further includes a partition wall extending from the circumferential wall, and separating the communication hole and the discharge hole.

Abstract: A fuel pump for a direct-injection system provided with a common rail comprises a pumping chamber defined in a main body. A piston is mounted in a sliding manner inside the pumping chamber to cyclically vary volume of the pumping chamber. A suction channel is connected to the pumping chamber and regulated by a suction valve. A delivery channel is connected to the pumping chamber and regulated by a delivery valve. A flow-rate-adjustment device is mechanically coupled to the suction valve to keep, when necessary, the suction valve substantially open during pumping of the piston and includes a control rod that is coupled to the suction valve and an electromagnetic actuator that acts on the control rod and has a one-way hydraulic brake that is integral to and substantially slows movement of the control rod.

Abstract: A jet pump assembly includes a fuel supply conduit, a first jet pump integrally formed as a single piece with the fuel supply conduit and in fluid communication with the fuel supply conduit, a second jet pump integrally formed as a single piece with the fuel supply conduit and in fluid communication with the fuel supply conduit, and an inlet conduit integrally formed as a single piece with the second jet pump.

Abstract: A fuel system 10 includes a fuel tank 11, a demand valve 12, a primer pump 13, and an internal combustion engine 14. The demand valve 12 closes and prevents fuel flow to the engine and potential fuel spillage when the engine is not running, even if a positive pressure condition exists in the fuel tank 11. The demand valve 12 is opened to allow fuel flow to the engine 14 only when the engine is to be started or is running. This opening of the demand valve is caused by a vacuum in a central cavity 31 of the demand valve 12. The vacuum causes a diaphragm 43 to move laterally and act through a connector 44 against a pin 39 connected to a valve member 37, to tilt or rotate the valve member 37 relative to a valve seat 34.

Abstract: A method of producing a diaphragm damper 1 having a high pressure chamber 3 comprised of two diaphragms 2 with flanges 6 welded together and charged inside with a high pressure gas. The diaphragms 2 are made of magnetically attractable thin metal sheets. A pair of jigs 30, 40 provided to face each other inside the pressure vessel 20 hold the diaphragms 2 by magnetic force. The pressure vessel 20 is sealed and evacuated, then the pressure vessel 20 is charged and pressurized by a mixed gas including helium. After this, the pair of jigs 30, 40 are made to approach each other to make the flanges 6 of the pair of diaphragms 2 come into close contact. Inside the pressure vessel 20, the jigs 30, 40 are simultaneously rotated to rotate the pair of diaphragms 2 and a laser beam is fired at the flanges 6 of the diaphragms 2 to weld the flanges 6 over their entire circumferences.

Abstract: A fuel safety valve arranged in a fuel supply line between a low-pressure pump and a high-pressure pump, is provided with a valve body which defines a cylindrical cavity having a longitudinal axis and being connected to a duct and a portion of a discharge duct in communication with the cylindrical cavity, a piston sliding with respect to the valve body in the cylindrical cavity along the longitudinal axis, and a spring housed in a variable-volume chamber defined by a portion of the cylindrical cavity between the piston and a closure element. The piston is provided with a through hole supplied with the fuel leading into the variable-volume chamber, and the valve body being provided with a fuel discharge hole connecting the variable-volume chamber to the discharge duct.

Abstract: The motorcycle includes a power unit having a crankcase of an internal combustion engine, a throttle body mounted to the power unit, a fuel injection system mounted on the throttle body, a fuel tank, the fuel pump unit by which a fuel in the fuel tank is supplied to the fuel injection system, and the fuel filter device. The fuel supply system for the motorcycle includes the fuel filter device disposed so as to overlap with the throttle body when viewed in the vehicle width direction, an upper portion of an outer case of the fuel filter device is supported by an engine hanger boss for fixing the power unit to a body frame of the motorcycle, and a lower portion of the outer case is supported by the crankcase.

Abstract: An outboard marine engine has vapor vent control apparatus including a fuel inlet in fluid communication with a fuel reservoir of the engine. The fuel inlet is operably attachable to a fuel pin of a fuel connector. When attached, liquid fuel flows to the fuel reservoir and when detached, liquid fuel flow out of the fuel inlet is prevented. A vapor vent passage is configured in fluid communication with the liquid fuel reservoir and an air intake of the engine. A vent pin is disposed in the vapor vent passage. The vent pin moves between a first position upon attaching the fuel connector to the fuel inlet and a second position upon detaching the fuel connector from the fuel inlet. In the first position, the vapor vent passage is open to fuel vapor flow and, when in the second position, the vapor vent passage is closed to fuel vapor flow.