Canister fuel bowl vent valve

Details Canister fuel bowl vent valve Canister fuel bowl vent valve

F - Mech Eng,Light,Heat,Weapons

02

M

123/20

F02M 33/02 (2006.01) F02M 25/08 (2006.01)

Patent

CA 1074637

-- Abstract of the Disclosure -- In a fuel vapor recovery system for an internal combus- tion engine, a canister fuel bowl vent valve is provided with a normally open valve element to control flow in a vent passage be- tween the carburator fuel bowl and a vapor storage canister, the valve element being responsive to engine vacuum to effect closing movement thereof whereby to block the flow of fuel vapors from the fuel bowl to the canister and, an electrical switch, responsive to engine oil pressure, energizes a solenoid which holds the valve element in a closed position, after it has been moved to a closed position in response to engine vacuum, whereby full venting of fuel vapors from the carburator fuel bowl to the canister occurs only when the engine is not in operation.

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