The present invention relates to an electromagnetic device (10) comprising: —an electromagnetic system (60), —a fuel vapour outlet conduit (30) extending the electromagnetic system (60), —a first housing (61), in which the electromagnetic system (60) is arranged. The invention is characterized in that the fuel vapour outlet conduit (30) is arranged in an intermediate housing (71).

A vehicle, a vehicle fuel reactant leak detection system, a computer program product, and a computer implemented method of detecting leakage of a fuel reactant from a vehicle. The vehicle includes one or more fuel cell modules, a fuel supply source to supply a fuel reactant to the one or more fuel cell modules via a high-pressure fuel supply line, a fuel supply valve configured to open and close fuel reactant flow through the high-pressure fuel supply line, and a computing device, operatively connected to the fuel supply source. The computing device includes one or more processors caused to conduct, in response to a detection as sensor data of pressure in the high-pressure fuel supply line when the vehicle engine is in a non-operating state, fuel pressure analysis of the sensor data, and detect, based on the fuel pressure analysis, leakage of the fuel reactant at the fuel supply valve.

In a fuel tank system, a control unit diagnoses a failure of a fuel storage unit and a processing unit. The fuel storage unit includes a vapor passage through which a fuel tank and a sealing valve are communicated with each other, a first pressure detection unit, and a second pressure detection unit disposed at a position different from the first pressure detection unit. The control unit specifies a presence or an absence of a clogging of the vapor passage based on a first pressure value detected by the first pressure detection unit and a second pressure value detected by the second pressure detection unit when the pressure in the fuel tank is changed by the pressure generation unit in a condition that the sealing valve is controlled to be opened.

A tank venting device for a fuel tank that supplies an internal combustion engine with a fuel includes a fuel vapor sorption system that is configured for reversibly storing fuel vapor in, and removing it from, the fuel tank, wherein the tank venting device includes at least one purge device, which is operable independently of the internal combustion engine, for applying a motive flow to the fuel vapor sorption system in the direction opposite from the fuel tank, so that the fuel vapor sorption system can be purged via a purge line, wherein the purge device includes at least one control device for controlling the motive flow.

A system and method for leak check module including first and second solenoid valves. A first solenoid valve is configured to be coupled between a fuel vapor canister and atmospheric air for controlling air flow in a first flow path between the fuel vapor canister and atmospheric air. A pump is configured to be coupled to atmospheric air. A second solenoid valve is configured to be coupled between the pump and the fuel vapor canister for controlling air flow in a second flow path between the fuel vapor canister and atmospheric air through the pump.

A valve, controlling pressure differential by regulating fluid flow between a tank and a canister, includes: a valve opening; a first moving element carrying a first sealing device making a leaktight seal and movable relative to the valve opening between a closed and an opened position allowing a first flow between the tank and the canister, through a first passageway with a first size; a second moving element carrying a second sealing device making a leaktight seal and movable relative to the valve opening between a closed and an opened position allowing a second flow between the tank and the canister, through a second passageway with a second size. The second moving element includes a central hole having a frustoconical surface partly defining the first passageway. The first sealing device has a complementary frustoconical surface cooperating with the frustoconical surface of the central hole of the second moving element.

An engine device is provided with a fuel vapor processor comprising a first supply pipe configured to supply a vaporized fuel gas including fuel vapor generated in a fuel tank, to a downstream side of a compressor in an intake pipe; a first valve provided in the first supply pipe; a second supply pipe configured to supply the vaporized fuel gas to an upstream side of the compressor in the intake pipe; and a second valve provided in the second supply pipe. When a supercharger operates and the first valve is closed, the engine device performs abnormality diagnosis of the second valve, based on a control state of the second valve and a pressure in the fuel tank.

A fuel tank vent valve includes a venting apparatus for regulating discharge of fuel vapor from a fuel tank and admission of outside air into a fuel tank. The vent valve is used to regulate pressure in a fuel tank.

A method of detecting a leak in an evaporative emissions system includes sealing an evaporative emissions system, achieving a first target pressure in the evaporative emissions system, achieving a second target pressure in the evaporative emissions system after achieving the first target pressure, and monitoring a system pressure subsequent to the second target pressure achieving step to determine a leak condition of the evaporative emissions system.

A leak detection module (LDM) includes a housing, a canister valve solenoid (CVS) that is arranged within the housing and in fluid communication along a first fluid passageway between first and second ports. The module also includes a pump that is arranged within the housing and is in fluid communication with the first and second ports, and a pressure sensor that is in fluid communication with at least one of the first and second ports. A first controller is arranged in the housing and is in communication with the pump, the CVS and the pressure sensor. The first controller runs a test procedure using the pump and operating the CVS between open and closed positions to monitor a pressure within the module. The first controller communicates a result based upon the monitored pressure to a second controller that is arranged outside the housing and remotely from the module.