METHOD OF SWITCHING FROM A PRESSURIZED TO NON-PRESSURIZED FUEL SYSTEM WHEN AN EVAPORATIVE EMISSIONS LEAK IS DETECTED

A method of operating a fuel tank system in a non-hybrid vehicle is provided. The fuel tank system has a fuel tank, a carbon canister, a canister vent valve, a vapor management valve and an isolation valve fluidly connected between the fuel tank and the carbon canister. The fuel tank system is opera...

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Bibliographische Detailangaben
1. Verfasser:	Memmer Matthew
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	A method of operating a fuel tank system in a non-hybrid vehicle is provided. The fuel tank system has a fuel tank, a carbon canister, a canister vent valve, a vapor management valve and an isolation valve fluidly connected between the fuel tank and the carbon canister. The fuel tank system is operated in a pressurized mode wherein the fuel tank is pressurized and the isolation valve is closed. The method determines whether a leak has been detected. The fuel tank system is operated in a non-pressurized mode based on the leak being detected.