Methods and systems are provided for a latchable refueling valve designed to reduce noise associated with opening and closing the valve. In one example, a system may include a valve armature with first and second latch indices formed on an outer diameter of the armature. The latch indices may be rounded and configured to engage with a latch guide to enable rotation between the armature and the latch guide.

A control device for a hybrid vehicle including an internal combustion engine includes: a limiting unit configured to limit an output of the internal combustion engine when temperature of cooling water for cooling the internal combustion engine is equal to or higher than a predetermined temperature; a discharging unit configured to discharge, when internal pressure of a fuel tank is equal to or higher than predetermined pressure, fuel evaporative gas in the fuel tank into an intake passage of the internal combustion engine while the internal combustion engine is being driven; and a prioritizing unit configured to prioritize the limiting of the output of the internal combustion engine by the limiting unit over the discharging of the fuel evaporative gas by the discharging unit, when the discharging unit is to discharge the fuel evaporative gas and the limiting unit is to limit the output of the internal combustion engine.

Methods and systems are provided for regulating the flow of fuel vapors exiting a fuel tank. In one example, a method for an engine may include adjusting an amount of fuel vapors flowing through a fuel vapor recirculation line, where the recirculation line may be coupled on a first end to a fuel tank and on an opposite second end to a fuel fill inlet. The valve may be adjusted to a more open position to increase fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from a fuel vapor canister, and to a more closed position to reduce fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from the fuel fill inlet.

A tank sealing valve arranged in a passage network through which a fluid flows between a fuel tank and a canister includes a first valve unit and a second valve unit. A first port and a second port of three ports included in an outer case body of the first valve unit are open toward a first chamber of two chambers divided by a diaphragm or a bellows of the first valve unit, and a third port of the three ports is open toward a second chamber of the two chambers. A valve body of the first valve unit includes a through passage penetrating a valve portion and a column portion of the valve body. The valve portion communicates with the first port and the second chamber through the through passage in a case where the first port is closed. The second valve unit opens and closes the third port.

A fuel tank system constructed in accordance to one example of the present disclosure includes a fuel tank, a purge canister, a valve assembly and a bypass means. The valve assembly can be fluidly coupled between the fuel tank and the purge canister and that selectively controls fuel vapor flow between the fuel tank and the purge canister. The bypass means can selectively bypass fuel vapor around at least a portion of the valve assembly from the fuel tank to the purge canister. The bypass means can include a bypass valve.

A fuel evaporative emission processing system suitable for a hybrid vehicle includes a shut-off valve, a first purge control valve and a second purge control valve. The shut-off valve is selectively opens and closes a fuel vapor passage between a fuel tank and a canister. The first purge control valve selectively opens and closes a purge passage between the canister and the intake passage of an internal combustion engine. The second purge control valve selectively opens and closes a tank opening passage between the canister and the fuel tank. When releasing a pressure for refueling, the second purge control valve with a small diameter opens prior to opening of the shut-off valve so that blow-by of gas associated with opening of the shutoff valve is prevented.

The invention relates to a fuel storage device (1) for a motor vehicle, comprising: a fuel tank (2), a canister (10) fluidically connected to the fuel tank (2), at least one separation unit (14) configured to receive the mixture of air and hydrocarbon vapors from the canister (10) and to separate said mixture into a hydrocarbon-rich fraction and a hydrocarbon-poor fraction, the hydrocarbon-rich fraction being sent to the fuel tank (2), return means (18) for returning the hydrocarbon-poor fraction to the canister (10), a purge pump (16) for purging the canister (10) which is arranged between the canister (10) and the separation unit (14), at least one solenoid valve (24) configured to selectively send the mixture of air and hydrocarbon vapors either to the separation unit (14) or to the fuel tank (2).

A fuel storage device for a motor vehicle that includes a fuel tank, a canister fluidically connected to the fuel tank, at least one separation unit configured to receive the mixture of air and hydrocarbon vapors from the canister and to separate said mixture into a hydrocarbon-rich fraction and a hydrocarbon-poor fraction, the hydrocarbon-rich fraction being sent to the fuel tank, return means for returning the hydrocarbon-poor fraction to the canister, a purge pump for purging the canister which is arranged between the canister and the separation unit, at least one solenoid valve configured to selectively send the mixture of air and hydrocarbon vapors either to the separation unit or to the fuel tank.

The present disclosure relates to the field of automobile valve, specifically to a fuel tank isolation valve. Including: a separating valve main body, the separating valve main body is internally provided with a valve cavity, the valve cavity is internally provided with a clapboard; an electromagnetic valve, the electromagnetic valve is installed on the isolation valve main body, the electromagnetic valve comprises a movable plunger extending into the valve cavity, the front end of the movable plunger is provided with a plug, the plug is opposite to the clapboard, one side of the movable plunger far away from the clapboard is propped against with a first spring; further comprising: a temporary power-off pressure relief device, the temporary power-off pressure relief device comprises a limiting seat, a sliding seat and a conversion device, the sliding seat is set at the front end of the electromagnetic valve body, the limiting seat is set on the movable plunger; the limiting seat and the sliding seat are respectively provided with axially opposite locking projections and convex eaves; the conversion device is used for converting the axial driving force of the movable plunger to the limiting seat to drive the limiting seat to rotate in the circumferential direction in one way; one side of the convex eave is provided with a first sliding groove for containing the convex axial sliding of the lock. It can realize the function of temporary power-off and pressure relief.