Abstract: An electronic compressor bypass valve (eCBV) module includes a pedestal housing, and a compressor bypass valve mounted to the pedestal housing. An inlet port, a first outlet port, and a second outlet port are integrally formed as part of the pedestal housing, where pressurized air flows into the inlet port. The eCBV module also includes a venturi device at least partially disposed in the second outlet port. When the compressor bypass valve is in an open position, a portion of the pressurized air flows through the first outlet port, and a portion of the pressurized air flows from the inlet port through the venturi device and through the second outlet port. When the compressor bypass valve is in the closed position the pressurized air is prevented from flowing into the first outlet port, and all of the pressurized air flows through the venturi device and through the second outlet port.

Abstract: An electronic compressor bypass valve (eCBV) module includes a pedestal housing, and a compressor bypass valve mounted to the pedestal housing. An inlet port, a first outlet port, and a second outlet port are integrally formed as part of the pedestal housing, where pressurized air flows into the inlet port. The eCBV module also includes a venturi device at least partially disposed in the second outlet port. When the compressor bypass valve is in an open position, a portion of the pressurized air flows through the first outlet port, and a portion of the pressurized air flows from the inlet port through the venturi device and through the second outlet port. When the compressor bypass valve is in the closed position the pressurized air is prevented from flowing into the first outlet port, and all of the pressurized air flows through the venturi device and through the second outlet port.

Abstract: A valve assembly providing flow control between a fuel tank and a carbon canister, which includes two valves providing two different flow paths, where the first valve provides active vacuum relief along the first flow path, and the second valve provides passive vacuum relief along the second flow path. A reservoir is added to the cap which is common for both flow paths. The second valve has a sealing valve member and a biasable member that passively relieves fuel tank vacuum pressure at a predetermined vacuum level.

Abstract: An active purge system module which includes a passive bypass valve assembly that allows for purge of a canister with engine vacuum or through the use of a pump, and also provides the functions of allowing air to escape the fuel tank during refueling. The valve assembly includes two valve members, which are moved between open and closed positions to direct air through the valve assembly during periods of engine vacuum, or when the valve assembly receives positive pressure from a pressure pump. The module is also used to perform a leak check when the valves are both in a closed position.

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: A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position, and a diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The diagnostic test is performed using the tank isolation valve and the canister vent valve under different operating conditions.

Abstract: A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position. A diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The tank isolation valve reduces power consumption from the battery, while the valve is being held in either an open position or a closed position by the latching mechanism, and uses only a single pulse of voltage to change the state of the valve.

Abstract: A system and method controls a ratio of fuel to gas delivered to an internal combustion engine. Fuel for the engine is stored in a fuel supply. The fuel supply generates fuel vapor that is retained in a canister. The canister is in fluid communication with the engine via a flow path. Hydrocarbon concentration of fuel vapor in the flow path is determined. Pressure drop across a restrictive orifice provided in the flow path is measured to determine a flow rate of the fuel vapor in the flow path. A flow of the fuel vapor through the flow path and to the engine is controlled and injection valves that inject fuel into the engine are controlled so that an amount of fuel injected into the engine is based on the determined concentration of hydrocarbons in the fuel vapor.

Abstract: A valve assembly providing flow control between a fuel tank and a carbon canister, which includes two valves providing two different flow paths, where the first valve provides active vacuum relief along the first flow path, and the second valve provides passive vacuum relief along the second flow path. A reservoir is added to the cap which is common for both flow paths. The second valve has a sealing valve member and a biasable member that passively relieves fuel tank vacuum pressure at a predetermined vacuum level.

Abstract: An evaporative emission control system for a vehicle includes a fuel tank, a vapor collection canister in communication with the fuel tank so as to receive hydrocarbons, a fuel cell in communication with the canister, and a pump constructed and arranged to pump hydrocarbons from the canister to the fuel cell so that the fuel cell can purge the canister by converting the hydrocarbons to water, carbon dioxide and electricity.

Abstract: An active purge system module which includes a passive bypass valve assembly that allows for purge of a canister with engine vacuum or through the use of a pump, and also provides the functions of allowing air to escape the fuel tank during refueling. The valve assembly includes two valve members, which are moved between open and closed positions to direct air through the valve assembly during periods of engine vacuum, or when the valve assembly receives positive pressure from a pressure pump. The module is also used to perform a leak check when the valves are both in a closed position.

Abstract: A system and method controls a ratio of fuel to gas delivered to an internal combustion engine. Fuel for the engine is stored in a fuel supply. The fuel supply generates fuel vapor that is retained in a canister. The canister is in fluid communication with the engine via a flow path. Hydrocarbon concentration of fuel vapor in the flow path is determined. Pressure drop across a restrictive orifice provided in the flow path is measured to determine a flow rate of the fuel vapor in the flow path. A flow of the fuel vapor through the flow path and to the engine is controlled and injection valves that inject fuel into the engine are controlled so that an amount of fuel injected into the engine is based on the determined concentration of hydrocarbons in the fuel vapor.

Abstract: A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position, and a diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The diagnostic test is performed using the tank isolation valve and the canister vent valve under different operating conditions.

Abstract: A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position. A diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The tank isolation valve reduces power consumption from the battery, while the valve is being held in either an open position or a closed position by the latching mechanism, and uses only a single pulse of voltage to change the state of the valve.

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: A vapor purge system having a tank isolation valve and a canister vent valve, where each valve includes a latching mechanism for maintaining the valves in an open position, and a diagnostic test is performed on the purge system to prove that each of the valves are functioning correctly. Using latching valves in these applications reduces electricity draw from the battery and reduces electrical interference with integrated pressure sensors. The fuel tank is sealed by the tank isolation valve between the fuel tank and a vapor storage canister, and the canister vent valve provides sealing between the canister and the atmosphere, and controls venting of the canister. The diagnostic test is performed using the tank isolation valve and the canister vent valve under different operating conditions.

Abstract: An evaporative emission control system for a vehicle includes a fuel tank, a vapor collection canister in communication with the fuel tank so as to receive hydrocarbons, a fuel cell in communication with the canister, and a pump constructed and arranged to pump hydrocarbons from the canister to the fuel cell so that the fuel cell can purge the canister by converting the hydrocarbons to water, carbon dioxide and electricity.