Abstract: A system and method are provided for detecting a leak in an automotive fuel system. The functions of vacuum sensing, vacuum relief (high vacuum relief level) and pressure relief (high pressure relief level) are all performed by a single self-actuated diaphragm-seal valve mechanism.

Abstract: In an working machine in which: an engine and a fuel tank for the engine are mounted on a machine body; an air cleaner mounted outside the machine body has a cleaner case including a cylindrical case body and a lid body being mounted on one end of the case body, and a cleaner element being housed in the cleaner case and dividing the inside of the cleaner case into a pre-purification chamber and a post-purification chamber; and an air-outlet pipe is connected to an intake system of the engine with an intake duct interposed therebetween, a canister capable of absorbing a vaporized fuel generated in the fuel tank is attached to the fuel tank or the machine body; a purge joint communicating with the post-purification chamber is provided to the lid body of the air cleaner; and a purge conduit extending from the canister is connected to the purge joint. Accordingly, it is possible to take a vaporized fuel generated in the fuel tank into the engine by utilizing the lid body of the air cleaner.

Abstract: An engine assembly may include an engine defining a cylinder bore, a fuel tank, a fuel supply assembly in fluid communication with the fuel tank and the cylinder bore, a fuel return assembly in fluid communication with the fuel supply assembly and the fuel tank, and a fuel filter assembly. The fuel filter assembly may include a filter casing having an inlet, an outlet and a bypass opening, and a filter media located within the filter casing. The filter media may be located between the inlet and the outlet, defining a dirty fuel region of the filter assembly between the inlet and the filter media and a clean fuel region between the filter media and the filter outlet. The bypass opening may be in fluid communication with the dirty fuel region and the fuel return assembly to draw gases out of the dirty fuel region.

Abstract: A comparator compares the total intake air amount accumulated by an accumulator with a reference value obtained via a selector. If the total intake air amount is smaller than the reference value, the CSS control is determined as being abnormal and a CSS-abnormality signal is output. If the number of times an atmospheric pressure learning value has been updated is equal to or larger than a threshold that is set large enough to determine that the accuracy of the calculated atmospheric pressure learning value is sufficiently high, a reference value is output from a characteristic storage to the comparator. Conversely, if the number of times the atmospheric pressure learning value has been updated is smaller than the threshold, an initial reference value is output from an initial reference value storage to the comparator.

Abstract: The fuel tank venting device is furnished with a full fuel control valve and a rollover valve that are installed on a fuel tank, and a fuel tank valve unit having a pressure valve that is situated between a canister and the two valves. The pressure valve is furnished with a casing that has a valve chamber, a valve body housed within the valve chamber, and a spring. The valve body has a disk-shaped valve part and a side wall that projects with tubular contours from the outside perimeter of the valve part, and has a cup shape defining a spring chamber that is bounded by the valve part and the side wall. The valve part is perforated by an orifice of smaller planar dimensions than the valve aperture.

Abstract: A high-pressure return passage returns excess fuel in a delivery pipe that is connected to an injector to a fuel tank. An upstream end of the high-pressure return passage is connected to the delivery pipe via a high-pressure regulator. A vertically lower portion of the high-pressure return passage is vertically below the upstream end and the downstream end. A low-pressure return passage returns excess fuel in a main passage to the fuel tank. The switch valve switches the open state and the closed state of the low-pressure return passage. A control section controls the switch valve to the closed state after the engine is stopped and drives the fuel pump so as to execute a forced return process that flows fuel into the high-pressure return passage.

Abstract: A device for a venting circuit of a liquid tank provided with a canister and a filling tube including a filling head, this device comprising: a) a control chamber that communicates with: the canister via a main orifice and a smaller-flow-area secondary orifice, both terminating in a ventilation line leading to the canister; the interior of the tank via the venting circuit; and the filling head via a pressure-equalizing line; b) a closure member that is: provided with an opening therethrough which brings the venting circuit into communication with the pressure-equalizing line; able to move in the control chamber between an operating position with the main orifice closed off by gravity and the secondary orifice left open, and a filling position with both orifices left open; and shaped to sealingly conform to at least a control chamber part that includes the main orifice.

Abstract: The invention relates to a motor vehicle, with a fuel tank which has tank ventilation, the tank ventilation for adsorption of fuel vapors having an activated charcoal filter through which a flushing air flow can flow, and with a vehicle unit which has a vacuum pump, in particular a brake booster. It is provided that the delivery side of the vacuum pump produces compressed air for driving the flushing air flow and/or that the compressed air forms the flushing air flow.

Abstract: An anti-flow interruption system is configured to provide a supply of fuel in the event of a fuel flow interruption from a fuel tank. The anti-flow interruption system includes a reservoir, a reservoir conduit, and a vapor bleed system. The reservoir conduit has an end disposed at the bottom of the reservoir and another connected to a fuel pump. The vapor bleed system includes a vapor bleed conduit and a vapor bleed restrictor. One end of the vapor bleed conduit is attached to the top of the reservoir and the other end is connected to the fuel pump. The vapor bleed restrictor is disposed in the vapor bleed conduit between the fuel pump and the reservoir. If fuel flow is interrupted and results in vapor being present in the reservoir, liquid fuel remaining in the reservoir continues to be supplied to the fuel pump while the vapor bleed system removes the vapor.

Abstract: A system for a vehicle includes an initialization module and a purge control module. The initialization module generates an initialization signal based on a crankshaft speed signal and/or a fuel rail pressure signal. The initialization module also generates the initialization signal based on an initial purge value and an assembly-line monitoring value. The purge control module generates a purge signal to purge air from a fuel injection system of an engine. The purge signal is generated when the crankshaft speed signal indicates that a crankshaft of the engine is stationary and/or the fuel rail pressure signal indicates that a fuel rail pressure is less than a predetermined value. The purge signal is also generated based on the initialization signal.

Abstract: An engine fuel supply system is provided at a reduced cost by using a HC dosing pump that supplies fuel into an exhaust pipe also as a pump for a cylinder fuel supply device. When a signal is generated to command air removal from a cylinder fuel supply passage, the dual-purpose pump is activated, a first on-off valve assumes an open state, and a second on-off valve assumes a close state, so that the fuel is supplied from the dual-purpose pump to the cylinder fuel supply passage via an air-removal fuel supply passage. When a signal is generated to command fuel supply into the exhaust pipe, the dual-purpose pump is activated, the second on-off valve assumes the open state, and the first on-off valve assumes the close state, so that the fuel is supplied from the dual-purpose pump to the exhaust pipe via the exhaust-pipe fuel supply passage.

Abstract: A liquid separator that can be used in a vehicle fuel system can have, among other components, an inlet portion, a deflector surface, and an outlet portion. The inlet portion can receive fluid from a fluid tube that communicates with a fuel tank. The deflector surface may cause a change-in-direction that separates liquid and fuel vapor from the fluid. The outlet portion can carry separated fuel vapor to a vapor tube that communicates with a canister. A space adjacent the inlet portion can be defined by a fuel system component such as partly by a fill tube or by a vessel.

Abstract: A system and method is provided for automatically priming a fuel system by bleeding/purging air or vapor therefrom. The system includes a bleed valve configured to automatically move between three positions in response to the pressure of the fuel in the system. When fuel pressure is in a first pressure range, the bleed valve automatically moves to a first-closed position for preventing fuel from draining to the fuel tank and thereby drawing air into the fuel system. When the fuel pressure moves to a second, higher pressure range, the bleed valve automatically moves to an open position for bleeding air out of the fuel system and into the tank, thereby priming the fuel system. When the fuel pressure moves to a third, still higher pressure range, the bleed valve automatically moves to a second-closed position so as to not interfere with the regulation of the pressure regulating valve.

Abstract: Prior art fuel line check valves remain closed after engine off and cool down. Diurnal heating and the resultant pressure increase in the fuel line causes fuel vapor emissions through small openings in the fuel line (e.g., at the injector tips). The invention provides a check valve for a vehicle fuel line which opens in response to engine cooling and remains open while the engine is off to relieve subsequent increasing pressure in the fuel line due to diurnal heating thereof.

Abstract: A manifold for a fuel filter assembly includes a first base, which may define a first inlet passage to direct flow to a first filter element, and a first outlet passage to direct flow from the first filter element to a second base. The manifold includes a second base, which may define a second inlet passage to receive flow from the first base and direct the flow to the second filter element, and a second outlet passage to receive the flow from the second filter element. The manifold includes a diverting module, which may provide flow communication between the first outlet passage and second inlet passage, such that flow in the first inlet passage passes through the first filter element before entering the second inlet passage. The first and second inlet passages may define a common longitudinal axis. The first and second outlet passages may define a common longitudinal axis.

Abstract: A fuel system of an engine is provided with a venting assembly to vent air that accumulates within a fuel filter of the fuel system and provides anti-drainback of clean fuel back toward the fuel filter when the engine is turned off. In one embodiment, the venting assembly includes a piston valve that provides both the vent and anti-drainback. The valve is actuatable by fluid pressure to a first position that restricts drainback, a second position that restricts venting, and intermediate positions between the first and second positions which permit venting.

Abstract: A device for separating gas from liquid includes a housing having an inlet for receiving a flow of liquid and gas. The inlet is positioned such that the flow of liquid and gas enters the housing in a direction substantially tangential to a circumference of an inner surface of the housing. The housing also includes a first outlet for discharging an at least partially gaseous flow from the housing and a second outlet for discharging an at least partially deaerated flow of liquid from the housing. The device also includes a gas separating element disposed inside the housing downstream from the inlet and upstream from the second outlet. The gas separating element forms at least one opening to permit liquid to pass and form the at least partially deaerated flow and to permit the at least partially gaseous flow to separate from the at least partially deaerated flow.

Abstract: A filtration device for filtering air for use with a fuel vapor recovery system. According to one aspect, the device includes a housing defining a chamber having a rotational axis an upper end and a lower end, a cap closes the housing and includes at least one generally helical passageway helically extending generally toward the lower end of the chamber and includes at least one air inlet. According to another aspect, the device includes a non-circular filter element disposed between an air inlet and an air outlet.

Abstract: A fuel injection controller for an internal combustion engine. The engine includes a fuel vapor treatment device having a collector for collecting fuel vapor generating in a fuel tank; a purge line that introduces purge gas into an intake passage of the engine, the purge gas being a mixture of fuel vapor released from the collector and air; and a purge valve provided in the purge line to adjust flow rate of the purge gas. The fuel injection controller corrects an amount of fuel injected from an fuel injection valve based on an amount of fuel vapor contained in the purge gas flowing into a combustion chamber of the engine. The fuel injection controller comprises an estimation section for estimating the inflow amount of the purge gas flowing into the combustion chamber based on a passed amount of purge gas that has passed through the purge valve and a compensation value for compensating transportation delay.

Abstract: A tank ventilating valve is disposed in a regeneration pipe which connects a storage container collecting fuel gas of a fuel tank to an intake pipe of the internal combustion engine. The tank ventilation system is air tightly sealed towards the atmosphere prevailing outside the motor vehicle while the tank ventilating valve is opened to create a negative pressure in the tank ventilation system. The method has the following steps: determining the fuel gas charge of the storage container; determining the volume flow rate through the tank ventilating valve; calculating an intermediate value from the product of the load and the volume flow rate; determining a tank pressure difference between the pressure prevailing in the fuel tank and the atmospheric pressure; and determining the additive corrective value by adjusting the intermediate value to the amount of the tank pressure difference.

Abstract: A flange assembly 10 is provided for a fuel supply unit of a vehicle. The assembly 10 includes a flange 12 constructed and arranged to cover an opening in a fuel tank. The flange has an interior portion constructed and arranged to be exposed to fuel. The interior portion is in communication with an outlet 15 provided at an exterior of the flange. A plastic manifold 16 is mounted to the interior portion of the flange so as to communicate with the outlet. The manifold is constructed and arranged to mount at least one fuel supply component 22 thereon.

Abstract: An integrated, modular system for delivering fuel to an engine component in an engine having a fuel tank, as well as engine employing such a system, and methods of implementing such a system, are disclosed herein. In at least one embodiment, the system includes a housing defining a chamber, an in inlet, and a passage leading to an outlet, the inlet receiving fuel from the tank and directing the fuel into the chamber, the outlet capable of providing fuel from the passage toward the engine component. The system also includes both a pump and a pressure regulator supported within the housing, with the pump having a pump input and output, and the pressure regulator having a regulator input and output. The pump input and regulator output are in communication with the chamber and the pump output and regulator input are in communication with the passage.

Abstract: A high-pressure fuel supply circuit, which supplies fuel in a fuel tank to injectors of an internal combustion engine, may includes a fuel pump that is employed so as to feed the fuel in the fuel tank with pressure to the injector, wherein one or more fuel pumps may be employed so as to improve a compression ratio of the fuel; a separator provided with a selective check valve so as to separate air from the fuel supplied by the fuel pump; and an injection pump receiving the fuel from the separator, compressing it, and feeding it with pressure to the injector.

Abstract: A fuel vapor control device include a fuel tank for storing fuel, a canister for adsorbing fuel vapor produced in the fuel tank, and an evaporation path communicating between the fuel tank and the canister. The tank has a resiliently deformable wall portion that can resiliently deform in response to an amount of the fuel vapor in the fuel tank, so that volume of the fuel tank can be varied. A pressure regulating valve can perform a relief function for opening the evaporation path during the expansion of volume of the fuel tank to a set volume. The pressure regulating valve closes the evaporation path if pressure inside the fuel tank is lower than the set value. On the other hand, the pressure regulating valve opens the evaporation path if the pressure inside the fuel tank is equal to or higher than the set value.

Abstract: A marine vessel propulsion device includes an engine, a fuel injection device, an intake system, a vapor separator tank arranged to separate fuel vapor from liquid fuel to be supplied to the engine, a pump unit arranged to transport the fuel from the vapor separator tank to the fuel injection device, a fuel pipe arranged to connect the fuel injection device and the pump unit, a vapor pathway arranged to connect the vapor separator tank and the intake system, a valve disposed in the vapor pathway, and an engine control unit. The engine control unit is arranged to control the opening degree of the valve in accordance with a valve opening speed set based on at least the pressure of the fuel in the fuel pipe when starting the engine.

Abstract: A fuel line air trap for an unmanned aerial vehicle has a vessel in-line with a fuel line, fuel line connectors, and fuel inlet and outlet stems. The vessel contains an inlet at a distal end and an outlet at a proximal end. The fuel line connectors are attached to the vessel at the inlet and at the outlet to connect the fuel line to the vessel. The fuel inlet stem attaches to the vessel at the inlet and a fuel outlet stem attaches to the vessel at the outlet. Both the fuel inlet stem and fuel outlet stem protrude into the vessel a predetermined distance such that a gap exists between them. As air bubbles enter the gap in the fuel line air trap, they separate from the flow of fuel and migrate to the exterior walls of the vessel. The air bubbles are purged during remain trapped refueling.

Abstract: A fuel system includes a fuel tank and a liquid separator. The fuel tank includes an interior in which liquid fuel and fuel vapor are contained, and has at least one vent in fluid communication with a vapor dome in the interior of the fuel tank. The liquid separator is in fluid communication with the at least one vent in the fuel tank, and has a fuel port disposed at a lower elevation than the at least one vent to enable the liquid separator to be passively aspirated under negative pressure conditions within the fuel tank. The liquid separator may be placed inside or outside the fuel tank.

Abstract: An inlet conduit for an engine air induction system, comprising: a plurality of openings located about the inlet conduit; a hydrocarbon vapor-adsorbent member disposed on an exterior surface of the inlet conduit, the hydrocarbon vapor-adsorbent member covering the plurality of openings; and a covering member secured over the hydrocarbon vapor-adsorbent member, the covering member sealing the hydrocarbon vapor-adsorbent member to the inlet conduit, wherein hydrocarbon vapors present in the air induction system after engine shut-down are substantially retained in the hydrocarbon vapor-adsorbent member until air flows through the air induction system after the engine starts.

Abstract: A recoil starter for an internal combustion engine has a housing with a pulley carried at least in part for rotation therein. The pulley is arranged in operable communication with a crankshaft of the engine. A pull cord is wound about the pulley with one end of the cord being arranged to be pulled by a user to rotate the pulley. An actuator is carried for rotation in response to rotation of the pulley. A pump is arranged for actuation in response to rotation of the actuator to provide fresh liquid fuel to a carburetor and remove fuel vapor and stale fuel from the carburetor and deliver it to a fuel tank prior to starting the engine.

Abstract: A fuel tank has phase change material located within its interior and in a heat transferring relationship with the contents of the tank. Thermal energy is transferred from the contents of the tank to the phase change material (PCM) when tank temperatures increase to the phase transition temperature (PTT) of the PCM. The PCM then transforms from solid to liquid to absorb substantial thermal energy and thereby helps to reduce vapor emissions. PCM also can be applied to the exterior of the tank. The fuel tank is particularly useful in automotive applications and also can be used in boats, motorcycles, and smaller powered equipment.

Abstract: In a fuel injection system, a fuel tank is disposed below an electronically controlled fuel injection apparatus. A fuel reservoir chamber for supplying fuel from the fuel tank is disposed above the electronically controlled fuel injection apparatus, and the fuel stored in the fuel reservoir chamber is supplied to the electronically controlled fuel injection apparatus via a fuel supply passage. The fuel reservoir chamber and the fuel tank are connected by a first fuel return passage through which vapor is ejected and fuel in the fuel reservoir chamber overflows. A second fuel return passage for returning surplus fuel from the electronically controlled fuel injection apparatus is connected to either of the fuel reservoir chamber and the first fuel return passage at the position above the connecting position at which the fuel reservoir chamber connects with the first fuel return passage.

Abstract: A method, fuel system, and components for facilitating the delivery of liquid fuel from a fuel tank in fluid communication with a float bowl carburetor of an internal combustion engine, wherein evaporative emissions of the fuel from the fuel tank and float bowl carburetor are mitigated. During operation of the engine, fluid communication is permitted between the fuel tank and the carburetor, and fuel vapors at a predetermined threshold superatmospheric pressure are permitted to vent outwardly from the fuel tank. During inoperation of the engine, fluid communication is prevented between the fuel tank and the carburetor, and fuel vapors at a predetermined threshold superatmospheric pressure are permitted to vent outwardly from the fuel tank.

Abstract: The present invention is directed to the use of an improved hydrocarbon adsorbent coating for the treatment of evaporative emissions from a motor vehicle. More specifically, one or more hydrocarbon adsorbents, in accordance with the present invention, can be coated to any surface area of an air intake system to trap hydrocarbon vapors before they can escape to the atmosphere, through said air intake system. In another embodiment, one or more hydrocarbon adsorbents can be incorporated in the air filter of an air intake system.

Abstract: A fuel property determining apparatus is provided to a fuel vapor treatment apparatus. The fuel vapor treatment apparatus controls purging of mixture containing fuel vapor, which is generated in a fuel tank and temporarily adsorbed in a canister, into an intake pipe of an internal combustion engine when the internal combustion engine operates. The fuel vapor treatment apparatus controls the purging on the basis of a fuel vapor state of the mixture. The fuel property determining apparatus includes a fuel vapor state determining unit for determining the fuel vapor state The fuel property determining apparatus further includes a fuel property determining unit for determining a fuel property, which is relevant to volatility of fuel, on the basis of change in the fuel vapor state, the change in the fuel vapor state being caused by the purging.

Abstract: A rotodynamic fuel pump in a fuel delivery system for an internal combustion engine including a pump housing, a pump inlet channel extending through the housing allowing fuel to be drawn into the pump, a purge orifice extending through the housing and spaced away from the pump inlet channel, the purge orifice allowing fuel vapor to exit the pump, the purge orifice including a purge inlet, a purge outlet, and a purge channel, where the purge inlet is axially offset from the purge outlet.

Abstract: An inlet conduit for an engine air induction system is provided, the inlet conduit having a plurality of openings located about a portion of the inlet conduit, the plurality of openings being disposed in a cavity of the inlet conduit; a hydrocarbon vapor-adsorbent member disposed in the cavity, the hydrocarbon vapor-adsorbent member covering the plurality of openings; and a covering member secured to the inlet conduit, the covering member being configured to cover and seal the hydrocarbon vapor-adsorbent member within the cavity, the covering member having an interior surface and an exterior surface, the interior surface facing the hydrocarbon vapor-adsorbent member while the exterior surface is flush with an exterior surface of the inlet conduit when the covering member is secured to the inlet conduit and wherein hydrocarbon vapors present in the air induction system after engine shut-down are substantially retained in the hydrocarbon vapor-adsorbent member until air flows through the air induction system af

Abstract: A system of mechanical components that operate cooperatively to control evaporation of fuel or hydrocarbon leakage from engines is disclosed. In at least some embodiments, the system of mechanical components comprises a first valve assembly and a second valve assembly. The first valve assembly, which functions as a fuel-shut off valve assembly, governs whether fuel can proceed from a fuel bowl into a carburetor, and when closed, prevents fuel vapors from developing within the carburetor. The second valve assembly, which functions as a “vapor venting control valve assembly,” has an input port that is coupled by way of a fuel tank vapor hose to both a fuel tank and to the fuel bowl. When in a closed state, the second valve assembly controls the fuel vapors, which are provided to its input port from the fuel tank and the fuel bowl, from being communicated to an output port of the second valve assembly.

Abstract: A manufacturing method for an actuator including a casing and a housing. The method includes setting a metallic ring in a molding die; injection molding a first flange portion of the casing using one annular hooking piece of the metallic ring as a part of a surface of the molding die so as to outsert-mold the metallic ring on a molded surface of the first flange portion, the molded surface being opposite to a first connecting end surface of the first flange portion; engaging the first flange portion with a second flange portion of the housing so as to be opposed to each other; and applying force to bend the metallic ring to form an other annular hooking piece, thereby crimping and fixing the first connecting end surface of the casing with a second connecting end surface of the housing.

Abstract: A fuel system (1) for a vibratory rammer (2) includes a tank arrangement (3), a diaphragm carburetor (4), a fuel line arrangement (5) and a venting line arrangement (6) for complementary venting of air from the fuel system (1) to the atmosphere. The fuel system (1) also includes a venting valve (7) which is open and closeable to the atmosphere. The tank arrangement (3) includes a primary fuel tank (8) and a secondary fuel tank (11).

Abstract: An engine with a high pressure common rail fuel system includes a bleed line to tank to facilitate evacuation of air and vapor from the fuel lines to assist in priming the fuel system. An anti-drainback valve prevents fuel vapor from migrating in a reverse direction through the bleed line toward the fuel pump during long periods of engine shut down. The inclusion of the anti-drainback valves helps facilitate short cranking times on the order of three seconds or less during engine start up, even after prolonged periods of engine shut down.

Abstract: A fuel delivery system for supplying liquid gas fuel to an engine is disclosed. The fuel can be supplied solely to the engine or together with diesel fuel. The fuel delivery system includes an injector (20) for receiving the liquid gas, and for ejecting the liquid gas in vapour form to the engine E. A bubble preventing mechanism (40, 44, 48; 8, 203, 209, 208) is supplied for preventing the liquid gas from bubbling or boiling in the injector which would impair the ejection of fuel from the injector. The preventing means comprises cooling means which may use a coolant to cool the injector. In one embodiment, the coolant is in the form of bubbled vapour which is directed away from the injector (20) and enters a chamber (206) in which the injector (20) is located, so that the vapour cools the injector (20). The vapour (20) can pass to a vapour block (208) for supply to the intake air of the engine so the vapour is supplied back to the engine together with fuel ejected by the injector (20).

Abstract: A vapor separator includes a fuel pump, and a container at least partially defining a fuel reservoir to hold fuel and a pump chamber to hold the fuel pump. A closure is carried by the container to close the fuel reservoir and at least partially defines a vapor chamber above a level of fuel in the fuel reservoir and in fluid communication with the pump chamber. A vapor vent device is carried by the closure to allow fuel vapor to vent out of the vapor separator from the vapor chamber and prevent liquid fuel from flowing therethrough when the vapor separator is declined.

Abstract: An internal combustion engine having a plurality of combustion cylinders and a fuel delivery system. The plurality of combustion cylinders are configured to receive a mixture of gasoline and air and combust such mixture, where some of the combustion cylinders are configured to operate in a spark ignition mode, with the remaining cylinders being configured to operate in a compression ignition mode. The engine may be configured to operate so that fuel vapor purge is added only to cylinders operating in the spark ignition mode. Alternatively, the engine may be operated in either a first purge mode, in which fuel vapor purge is added only to spark ignition cylinders, or a second purge mode, in which fuel vapor purge is added to spark ignition cylinders and compression ignition cylinders.

Abstract: A fuel supply system for an outboard marine engine includes a vapor separator (28) having a uni-directional vapor vent device (36) for preventing fuel leakage when the engine (12) is tipped on its side. The vapor separator (28) includes an enclosed interior chamber (50) which is filled with liquid fuel by a suction pump. A separate, high pressure pump transfers the liquid fuel from the interior chamber (50) to a fuel injection system (32) of the engine (12). The vapor vent device (36) includes a generally tubular casing having an enclosed top end permeated by an escape passage (84), and a float (94) slidably disposed within the casing (82) for movement toward and away from sealing engagement with the escape passage (84).

Abstract: The invention relates to a motor vehicle, with a fuel tank which has tank ventilation, the tank ventilation for adsorption of fuel vapors having an activated charcoal filter through which a flushing air flow can flow, and with a vehicle unit which has a vacuum pump, in particular a brake booster. It is provided that the delivery side of the vacuum pump produces compressed air for driving the flushing air flow and/or that the compressed air forms the flushing air flow.

Abstract: A fuel vapor treatment apparatus includes a canister, a fuel vapor supply tube and a booster pump. The booster pump compresses fuel vapors retained in the canister and feeds the fuel vapors in the form of a compressed gas to fuel injectors of an engine via the fuel vapor supply tube.

Abstract: A pressure management apparatus (10) includes a housing (30) defining a fluid communication passage between first and second fluid ports (46, 48). A poppet (40) is disposed in the housing and is movable between first and second positions. The first position prevents fluid communication between the first and second ports and the second position permits fluid communication between the first and second ports. The poppet includes a structure (75) translatable along an axis relative to the housing. At least a portion of the structure includes a permanent magnet (72). A member (78) is fixed with respect to the housing and is associated with the structure. At least a portion of the member is of ferrous material such that the magnet is attracted to the member so that at least a portion of the poppet frictionally engages the member to create a dashpot damping of resonance of the poppet in the second position.

Abstract: A system and method is provided for automatically priming a fuel system by bleeding/purging air or vapor therefrom. The system includes a bleed valve configured to automatically move between three positions in response to the pressure of the fuel in the system. When fuel pressure is in a first pressure range, the bleed valve automatically moves to a first-closed position for preventing fuel from draining to the fuel tank and thereby drawing air into the fuel system. When the fuel pressure moves to a second, higher pressure range, the bleed valve automatically moves to an open position for bleeding air out of the fuel system and into the tank, thereby priming the fuel system. When the fuel pressure moves to a third, still higher pressure range, the bleed valve automatically moves to a second-closed position so as to not interfere with the regulation of the pressure regulating valve.

Abstract: Prior art fuel line check valves remain closed after engine off and cool down. Diurnal heating and the resultant pressure increase in the fuel line causes fuel vapor emissions through small openings in the fuel line (e.g., at the injector tips). The invention provides a check valve for a vehicle fuel line which opens in response to engine cooling and remains open while the engine is off to relieve subsequent increasing pressure in the fuel line due to diurnal heating thereof.

Abstract: The invention relates to a fuel supply device (2) for a motor vehicle, which comprises a fuel tank (1). An intake connection (24) of a fuel pump (7) is located in a ventilation device (4). The fuel pump (7) simultaneously takes in fuel from the fuel tank (1) and from the ventilation device (4). For this purpose, the fuel pump (7) and a bubble removal container (8) of the ventilation device (4) are configured as a single structural unit.