Abstract: An evaporated fuel processing apparatus includes a valve between a canister and a fuel tank, and maintains the fuel tank in hermetic state by closing the valve while a vehicle is stationary, and adsorbs evaporated fuel by the canister by opening the valve during fuel filling, wherein the evaporated fuel occurs in the fuel tank. A diagnostic apparatus includes: a pump connected to a canister-side region with respect to the valve, and configured to pressurize a system of the canister and the fuel tank; and a pressure sensor for sensing an internal pressure of the system. The diagnostic apparatus starts pressurization by the pump with the valve closed; brings the system into a pressurized state by opening the valve with a delay after the start of pressurization; and performs a leakage diagnosis based on a change in the internal pressure of the system from the pressurized state.

Abstract: Systems and methods to control fuel tank pressure to reduce fuel oxidation in plug-in hybrid electric vehicles are disclosed. A method comprises routing vapors from a fuel system canister to the fuel tank to maintain the fuel tank pressure at a desired pressure. In this way, the engine may be maintained off for greater durations while still retaining fuel quality of fuel stored on-board the vehicle.

Abstract: A portable engine-driven system comprising an engine having an air intake passage, a fuel tank operatively coupled to the engine, a valve, and a pressure regulator. The valve may be coupled between the fuel tank and the air intake passage and configured to transition between a first position and a second position. The first position may allow fuel vapor to flow between the fuel tank and the air intake passage and the second position may inhibit the fuel vapor from flowing between the fuel tank and the air intake passage. The pressure regulator may be positioned in line between the fuel tank and the air intake passage.

Abstract: An evaporated fuel treating apparatus, comprising a passage allowing circulation of fluid inside, a tank port and a purge port at one end of the passage, and an atmospheric port at the other end of the passage, and provided with a plurality of adsorption chambers each filled with granular activated carbon or crushed activated carbon in the passage, and a support member set between a first adsorption chamber located closest to the atmospheric port in the plurality of adsorption chambers and a second adsorption chamber located on the tank port side of the first adsorption chamber in the plurality of adsorption chambers, to space the first and second adsorption chambers apart from each other, and at least a part of the support member can adsorb evaporated fuel components. With this configuration, evaporated fuel components escaping to the outside through the atmospheric port are reduced.

Abstract: An evaporated fuel processing apparatus includes a valve between a canister and a fuel tank, and adsorbs evaporated fuel by the canister during fuel filling, and introduces into an intake air line of an internal combustion engine and processes the evaporated fuel while the internal combustion engine is operating. A diagnostic apparatus includes: a pump for pressurizing a system including the fuel tank and the canister; and a pressure sensor for sensing an internal pressure of the system. The diagnostic apparatus diagnoses whether or not leakage is present, based on a change in the internal pressure of the system from a pressurized state, wherein the pressurized state is a state pressurized to a predetermined pressure for diagnosis that is higher than a tank pressure at start of diagnosis; and maintains the fuel tank in the pressurized state by closing the valve after termination of the diagnosis.

Abstract: A liquid vapor separator drain valve includes an outer housing defining upper and lower chambers separated by a divider. An upper housing coupled to the outer housing partitions the upper chamber into inner and outer chambers and defines an upper port for communication with a carbon canister. The outer housing defines an external port in communication with the outer chamber and for communicating with a fill limit valve. Upper and lower valves are positioned in the respective upper and lower chambers such that the valves and upper and lower chambers are arranged in a vertically stacked, concentric manner. The lower valve vents fuel vapor to the upper chamber in a rest position and seals a divider vent passage when liquid fuel reaches a lower threshold. The upper valve vents fuel vapor to the upper port and seals the upper port when liquid fuel reaches an upper threshold.

Abstract: An evaporation fuel processing device is provide including: a passage; a tank port and a purge port on one end side of the passage; an atmospheric air port on the other end side of the passage; and adsorbent layers filled with adsorbent for evaporation fuel components, provided in the passage; a region provided on an atmospheric air port side of the passage, being constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, in which a volume of the adsorbent layer is smaller in the adsorbent layer closer to the atmospheric air port, a volume of the separating part is larger closer to the atmospheric air port, and the volume of the separating part located farthest on a tank port side is larger than that of the adsorbent layer located farthest on the atmospheric air port side.

Abstract: Methods and systems for passively purging a hydrocarbon trap in an engine intake in a vehicle are disclosed. In one example approach, a method comprises, in response to an ambient temperature decrease during an engine off condition while a fuel tank is sealed from atmosphere, delivering fuel stored in a hydrocarbon trap in an intake of the engine to a fuel vapor canister coupled to the fuel tank in an emission control system.

Abstract: A vehicle fuel system includes a vapor recovery canister containing at least two carbon beds. Each carbon bed is configured to capture hydrocarbon material associated with fuel vapor discharged from a vehicle fuel tank into the canister.

Abstract: An evaporative emissions control system for reducing the amount of fuel vapor emitted from a vehicle includes a canister containing a sorbent material and a cartridge heater disposed at least partially within the canister in direct contact with the sorbent material. Electrical terminals for applying power to a heating element within the heater are disposed external to the canister. At least one heat sink may be included within the canister in direct contact with the heater. A method of manufacturing an evaporative emission control system that includes a cartridge heater disposed in a canister is also presented.

Abstract: Methods and systems are provided for monitoring a fuel vapor recovery system including a fuel tank isolation valve coupled between a fuel tank and a canister. During selected conditions, the valve is modulated and pressure pulsations in the fuel vapor recovery system are monitored. Valve degradation is identified based on correlations between the valve modulation and the resultant pressure pulsations.

Abstract: A filter device for venting a fuel tank on a motor vehicle may include a filter module attached to the filter device. The filter module may have a module housing having at least two series-connected filter chambers.

Abstract: A tank ventilation system of a fuel tank (2) has at least one housing (20) with a tank-side fuel vapor inlet opening (22), an engine-side fuel vapor outlet opening (26) and an atmosphere opening (24). The housing (20) has at least one first adsorption region (32) and a second adsorption region (34) upstream of the fuel vapor outlet opening (26). The second adsorption region (32) has a substantially lower absorption capacity than the first adsorption region (32), which is placed in a direction of flow toward the atmosphere opening (24).

Abstract: The present invention enables a canister in a fuel tank with the canister to be separately subjected to a product inspection and enables the canister to be replaced. The fuel tank according to the present invention includes: a tank body (10m) configured by joining a plurality of shells (12) and (14) to each other; and a canister (20) configured to enable absorption of fuel vapor generated in the tank body (10m), wherein, in one (12) of the shells that constitute the tank body (10m), and engaging portion (120) formed to be integral with the shell (12) is provided, and the canister (20) is configured to be mounted to the tank body (10m) by engaging an engaged portion (20r) of the canister (20) with the engaging portion (120).

Abstract: An engine includes a fuel tank with a fuel tank body defining an internal fuel tank volume for containing a fuel, a vent conduit integrally formed with the fuel tank body, and an air cleaner system including an air cleaner housing defining an internal air cleaner volume. The vent conduit extends between an inlet aperture and an outlet aperture. The inlet aperture is in fluid communication with the internal fuel tank volume. An opening is formed in the air cleaner housing and the vent conduit extends through the opening. The outlet aperture of the vent conduit is positioned within the internal air cleaner volume and the vent conduit provides fluid communication between the internal fuel tank volume and the internal air cleaner volume.

Abstract: A microcondenser device for an evaporative emission control system includes a housing having an inlet for receiving fuel vapor and a condensation outlet for discharging condensed fuel vapor, and a porous element disposed in the housing and fluidly interposed between the inlet and the condensation outlet for absorbing the fuel vapor received through the inlet. The microcondenser device further includes a thermoelectric element in thermal contact with the porous element for removing heat from the fuel vapor absorbed by the porous element to condense the fuel vapor.

Abstract: The present invention provides an evaporation fuel processing device including: a passage formed inside so as to allow a fluid to flow through the passage; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side of the passage; and adsorbent layers filled with adsorbent which can adsorb evaporation fuel components, the adsorbent layers being provided in the passage, wherein a region which is constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, and in which a total volume of the adsorbent layers is set smaller than a total volume of the separating parts, is provided on an atmospheric air port side of the passage.

Abstract: A fuel vapor processing apparatus including: a passage for fluid; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side; and four or more adsorption layers filled with a fuel adsorbing material, wherein the main adsorption layer, and a region provided on the atmospheric air port side of the main adsorption layer are provided; the adsorption layers other than the main adsorption layer, and separation parts which separate the adjacent adsorption layers are provided in the region, and in the at least two separation parts inside the region, when the cross-sectional area of each of the at least two separation parts perpendicular to a flow direction of the passage is converted into a circular cross-sectional area, a distance between the adjacent adsorption layers is larger than the mean value of diameters of the each separation part.

Abstract: An urea solution venting system for a vehicle which passes an ammonia component produced from an urea solution supplied for post-processing on an exhaust gas of the vehicle may include an urea solution tank, an urea solution injection pipe that communicates with the urea solution tank to replenish the urea solution tank, a first venting pipe to send an ammonia component produced in the urea solution tank to the urea solution injection pipe, a valve module that has a first outlet for sending the ammonia component in the first venting pipe to the urea solution injection pipe, and has a second outlet through which the ammonia component in the urea solution injection pipe is discharged to the outside, an urea solution injection port to receive an injection gun for injecting an urea solution into the urea solution injection pipe, and a flap that closes the urea solution injection port.

Abstract: The invention relates to a device for aeration and ventilation of a fuel system of a motor vehicle, with a pipe union for connecting the device to the fuel system, the pipe union being connected via a connecting element to a three-way valve via which the pipe union can be fluid-connected alternately to an air inlet opening or an air outlet opening of the device. Furthermore, there is a filter element which is located in the flow path between the air inlet opening and the three-way valve. The filter element, the three-way valve, and the connecting element are accommodated in a common housing. An especially compact and space-saving device is devised by the integration of the three-way valve, connecting element, and filter element into one unit.

Abstract: A fuel vapor processing apparatus may include a container including an atmospheric introduction portion, through which the atmospheric air can be introduce into the container. An adsorption material may be contained in the container and configured to adsorb feel vapor and to allow the adsorbed fuel vapor to be desorbed as the atmospheric air introduced into the container flows through the adsorption material. A heater may directly or indirectly heat a part of the adsorption material located at an upstream end with respect to the flow of the atmospheric air.

Abstract: A method for a fuel system coupled to an engine comprising: under vacuum conditions, opening the fuel vapor canister purge valve, and generating pressure pulsations in a conduit coupled to the fuel vapor canister purge valve by opening and closing a fuel vapor canister vent valve one or more times while maintaining the fuel vapor canister purge valve open. In this way, contaminants and/or debris that may prevent the canister purge valve from closing completely may be dislodged and evacuated to the intake manifold.

Abstract: A vehicle system comprises an internal combustion engine including a PCV system fluidly coupled to a gaseous fuel source via a flow control valve. The gaseous fuel source may be fluidly coupled to an air inflow line of the PCV system, and the flow control valve may be configured to control a flow of gaseous fuel into the PCV system.

Abstract: A fuel vapor processing apparatus may include a case defining therein a first adsorption chamber, a second adsorption chamber and a non-adsorption chamber communicating between the first adsorption chamber and the second adsorption chamber. The cross sectional flow area of the first adsorption chamber may be smaller than the cross sectional flow area of the second adsorption chamber.

Abstract: In an FFV (flexible fuel vehicle) on which an internal-combustion engine using alcohol blended fuel in mounted, the remaining amount of fuel vapor presumed to remain in a canister in accordance with a usual purge processing is presumed based on an alcohol concentration in the alcohol blended fuel. According to this remaining amount, the size of the tank side channel which is a channel in a canister near the connection section with a connection pathway (tank line) with a fuel tank is adjusted by a canister throttle control means, and/or, the timing of opening and closing of an intake valve is changed by a variable valve timing mechanism. Thereby, the desorption rate (the amount of desorption) of fuel vapor from adsorption material in a canister is adjusted, and the concentration of the fuel included in purge gas is adjusted.

Abstract: A fuel vapor processing apparatus may include a container including an atmospheric introduction portion, through which atmospheric air is introduce into the container. An adsorption material may be contained in the container and may be configured to adsorb fuel vapor and to allow the adsorbed fuel vapor to be desorbed from the adsorption material as the atmospheric air introduced into the container flows through the adsorption material. A heater may heat the adsorption material for promoting desorption of fuel vapor and may have a heating value decreasing along a length of the heater in a flow direction of the atmospheric air through the adsorption material for desorption of fuel vapor.

Abstract: A canister for a vehicle, and more particularly, a canister with dual air flow paths is configured to divide an inner space of an air entrance of the canister into two spaces and allow air to flow in from an outdoor atmosphere through one space between two spaces in a purging operation and discharge fuel evaporation gas to the outdoor atmosphere through the other space when the fuel evaporation gas is discharged in order to prevent pressure in a fuel tank from being raise raised.

Abstract: A fuel vapor processing apparatus may include a canister capable of adsorbing fuel vapor produced in a fuel tank, a closing valve provided in a vapor passage connecting the canister and the fuel tank, a purge passage connecting the canister and an intake passage of an engine, and a control device. The closing valve may include a movable valve member movable along a linear path and an actuator coupled to the movable valve member. The control device may be coupled to the actuator and may be configured to control the actuator such that the position of the movable valve member along the linear path changes according to a deviation of an actual tank internal pressure of the fuel tank from a target tank internal pressure.

Abstract: Methods and systems are provided for controlling a fuel system in a hybrid vehicle. Before canister purging is stopped by closing a purge valve, a canister vent valve is closed to hold fuel tank vacuum. Then, during a subsequent canister purge, the purge valve is opened before opening the vent valve, allowing canister purge to initiate under fuel tank vacuum conditions.

Abstract: Systems and methods are provided for engine systems including a vacuum-powered multiple tap aspirator coupled between atmospheric, an engine crankcase, or another source and a vacuum source such as a compressor inlet or engine intake manifold. The multiple tap aspirator includes a suction tap arranged in a throat of the aspirator, a suction tap arranged in a diverging cone of the aspirator, and a suction tap arranged in a straight exit tube downstream of the diverging cone of the aspirator. The aspirator provides vacuum generation and suction flow over a range of vacuum levels at the suction taps, and suction flow only passes through a single check valve before entering the aspirator.

Abstract: Systems and methods for separating higher octane fuel from a fuel mixture are presented. In one example, fuel vapors may be limited or constrained from migrating to fuel tanks storing lower octane fuels. The systems may vent fuel vapors from a plurality of fuel tanks to a single fuel vapor storage canister. Alternatively, the systems may vent fuel vapors from the plurality of fuel tanks to a plurality of fuel vapor storage canisters.

Abstract: Systems and methods are provided for engine systems including a first multiple tap aspirator with a motive inlet coupled to an intake upstream of an air induction system throttle and a mixed flow outlet coupled to an intake manifold, and a second multiple tap aspirator with a motive inlet coupled to the intake upstream of a main throttle and a mixed flow outlet coupled to the intake downstream of the air induction system throttle. During non-boost conditions, intake air may be selectably diverted around a compressor and through the first and/or second aspirator based on desired vacuum generation. During boost conditions, the first and second aspirators may function as compressor bypass valves, and intake air may be selectably directed from downstream of the compressor to upstream of the compressor via the first and/or second aspirator based on a desired compressor bypass flow.

Abstract: A heat storage member housed in a canister together with an adsorbent capable of adsorbing fuel vapor has a sealed container and a phase-change material housed in the sealed container. The phase-change material becomes semisolid gel state at the melting point of the phase-change material. The phase-change material is disposed along an entire inner surface of the sealed container such that a space capable of compensating for volume alteration of the phase-change material caused by phase-change is formed at a center of an inner space of the sealed container.

Abstract: A purge vapor system, which includes a fuel tank, a fuel tank isolation valve in fluid communication with the fuel tank, and a carbon canister in fluid communication with the fuel tank isolation valve. The purge vapor system also includes a canister vent valve in fluid communication with the carbon canister, an air filter in fluid communication with the canister vent valve, and a latching mechanism for changing the canister vent valve between an open position and a closed position, where the latching mechanism is part of the canister vent valve. The latching mechanism is energized as the latching mechanism changes the canister vent valve between the open position and the closed position, and the latching mechanism is de-energized as the canister vent valve is held in the open position or the closed position.

Abstract: Embodiments of the invention are directed towards a trap canister for adsorbing fuel vapor contained in breakthrough gas discharged from a main adsorbent canister. The main adsorbent canister is connected to a fuel tank has a case defining an adsorption chamber therein and an adsorbent filled in the adsorption chamber. The case has a first end open to the atmosphere and a second end for introducing breakthrough gas into the adsorption chamber. The adsorbent filled in the adsorption chamber adsorbs the fuel vapor contained in the breakthrough gas. The trap canister further has a bypass path for bypassing the adsorption chamber and a valve configured to block the bypass path and to allow for opening during refueling. This prevents the fuel vapor from flowing into the atmosphere during normal operation while also decreasing pressure loss during refueling.

Abstract: The present invention includes a fuel vapor processing apparatus including a communication passage connecting between a first space and a second space each containing an adsorption material capable of adsorbing fuel vapor. The communication passage includes a dissipation delaying space capable of delaying dissipation or transmission of the fuel vapor between the first and second spaces. The communication passage further includes throttles positioned to oppose to each other across the dissipation delaying space.

Abstract: Disclosed in certain embodiments are methods of improving efficiencies of adsorbed gas fuel systems and to recover vapors from gasoline containers.

Abstract: A hydrocarbon trap assembly for use in an intake system of a motor vehicle engine includes a first duct having an interior recess adjacent an end thereof, the recess having a blind end; a second duct overlapping the first duct's end and closing off a second end of the recess; and a thermoformed hydrocarbon-adsorbing sleeve inside the recess and having a first edge adjacent the blind end and a second edge adjacent the second end of the recess. One or both ends of the sleeve may engage a hook formed on the respective first and/or second ducts. The second end of the sleeve may have a flange that fits into a gap between the ducts.

Abstract: Methods and systems are provided for monitoring a fuel vapor recovery system including a fuel tank isolation valve coupled between a fuel tank and a canister. During selected conditions, the valve is modulated and pressure pulsations in the fuel vapor recovery system are monitored. Valve degradation is identified based on correlations between the valve modulation and the resultant pressure pulsations.

Abstract: The control device of an internal combustion engine of the present invention is a control device of an internal combustion engine in which a bypass channel (25) for bypassing a throttle valve (6) of an engine intake system (5) via an evaporated fuel adsorption device is provided as a fuel emission path to an evaporated fuel adsorption device (22) for adsorbing evaporated fuel in a fuel tank (19), and exhaust gas recirculation is implemented for recirculating exhaust gas via an exhaust gas recirculation passage (17) connected upstream of the entrance of the bypass channel of the engine intake system.

Abstract: When fuel tank internal pressure is at a first predetermined pressure P1 or above over a first predetermined time length t1, a fuel tank shutoff valve is opened and a vapor solenoid valve is closed to make piping internal pressure equal to the fuel tank internal pressure. Then, a purge control valve is opened to emit fuel evaporative gas from the fuel tank into an intake passage. When the fuel tank internal pressure is continuously at a second predetermined pressure P2 or below over the first predetermined time length t1, the fuel tank shutoff valve is closed, and when accumulated volume in high-pressure purge finishing phase reaches a second predetermined volume iv2 or above, the vapor solenoid valve is opened. When the accumulated volume in high-pressure purge finishing phase reaches a first predetermined volume iv1 or above, the purge control valve is opened and the engine is stopped.

Abstract: A method and device for detecting the blocking of a bleed valve (4) of a gasoline vapor filter (3) for a vehicle internal combustion engine (1), the method includes a step of controlling the maintenance of the internal combustion engine at a constant non-idle speed during a start or pre-stop phase, and at least one sequence of the following steps when maintaining the constant speed of the internal combustion engine: a step of changing the state of the bleed valve (4), a step of measuring at least one operating parameter of the internal combustion engine associated with the mixture fed into the engine, a step of comparing the values of the parameter measured before and after the change of state of the bleed valve and of determining if the variation of the parameter is greater than a pre-determined threshold.

Abstract: The invention relates to an activated charcoal filter (10) for storing and releasing gaseous hydrocarbons which originate from a fuel supply means of a motor vehicle. The activated charcoal (14) can be supplied with gaseous hydrocarbons via an inlet (16). A heating means for heating of the activated charcoal (14) is made available by a tank shutoff valve (18) by means of which the inlet (16) can be shut off. Since the tank shutoff valve (18) is being operated as a heating means, an additional heating means for regenerating the activated charcoal (14) can be omitted. Furthermore, the invention relates to a motor vehicle with such an activated charcoal filter (10) and a method for operating an activated charcoal filter (10).

Abstract: A canister arrangement structure in a fuel vapor recovery device includes a canister that has built therein an adsorbent for adsorbing fuel and temporarily collects fuel vapor generated in a fuel tank of an internal combustion engine, the canister is arranged between an exhaust pipe of the internal combustion engine and the fuel tank.

Abstract: A fuel system, in particular of a motor vehicle, includes a fuel tank and a ventilation device for ventilating the fuel tank, wherein the ventilation device has at least one separation device which has a temporary accumulator for liquid fuel and a fuel delivery device which is configured as jet pump for delivering fuel out of the temporary accumulator. In an operating medium line of the jet pump a pressure reducing element or a pressure adjustment element is provided.

Abstract: A method for detecting the blockage of the purge valve (4) of a vapor filter (3) for a hybrid fuel drive vehicle including at least one internal combustion engine (1) and one electric generator/motor, includes a step of making the electric motor drive the internal combustion engine (1) so as to keep the internal combustion engine (1) at a constant speed, during a start-up phase or a phase preliminary to stopping, and at least one sequence of the following steps during this time that the internal combustion engine is kept at a constant speed: a step of opening the purge valve (4); a step of measuring at least one operating parameter of the electric motor; a step of comparing the values of the measured parameter before and after opening the purge valve (4) and of determining whether the variation in the parameter is above a predetermined threshold.

Abstract: A valve assembly is disclosed for controlling fluid flow between two reservoirs. The valve assembly includes a relief valve arranged inside the housing and configured to open a first fluid flow path when the first reservoir is above a first predetermined pressure value.

Abstract: An isolation valve includes a flow restrictor disposed in a passage and having a piston with a first orifice and a depressurization valve with a second orifice. The valve also includes a solenoid valve assembly having a coil that is selectively energized by a signal from a controller and an armature that is moveable between first and second positions to open and close the first orifice and/or the second orifice. When the coil is energized, the armature moves to the second position to allow vapor to flow through the first orifice, the depressurization valve selectively opens to allow vapor to flow through the first orifice, the second orifice, or both. The two orifices work together to provide controlled vapor flow.

Abstract: Methods and systems for detecting a refueling event for diagnostics are disclosed. In one example approach a method comprises discontinuing leak diagnostics in response to a temperature change in a fuel vapor canister coupled to a fuel tank in an emission control system while the leak diagnostics are being performed in the emission control system.

Abstract: The invention relates to a tank venting system for a fuel tank (12) of a vehicle, having a vent line (14) for discharge of gaseous hydrocarbons from the fuel tank (12) during refueling thereof. Gaseous hydrocarbons originating from the fuel tank (12) can be introduced in a filler pipe (20) of the fuel tank (12) via a recirculation line (24). A control device (34) controls a proportional valve (32) and changes in this way a pass-through cross section of the recirculation line (24). In this way, a load of an activated charcoal filter (16) which is coupled with the vent line (14) can be minimized. The control device (34) can especially determine a pressure in the fuel tank (12). Furthermore, the invention relates to a method of venting a fuel tank (12) during refueling thereof.