Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-07-13
1979-04-17
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
137DIG8, F02M 3302
Patent
active
041495047
ABSTRACT:
In a fuel vapor recovery system for an internal combustion engine, a canister fuel bowl vent valve is provided with a normally open valve element to control flow in a vent passage between the carburetor 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 carburetor fuel bowl to the canister occurs only when the engine is not in operation.
REFERENCES:
patent: 2332108 (1943-10-01), Paille
patent: 3618909 (1971-11-01), Toda et al.
patent: 3703165 (1972-11-01), Hansen
patent: 3935850 (1976-02-01), King
patent: 4016848 (1977-04-01), Nagai
Dolinar Andrew M.
General Motors Corporation
Krein Arthur N.
Myhre Charles J.
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