Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-11-07
1979-11-27
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
261 72R, F02M 5942
Patent
active
041755260
ABSTRACT:
Apparatus for venting fuel vapors present in the fuel bowl of a carburetor for an internal combustion engine, the carburetor having a passage through which air is drawn into the engine and a throttle valve positioned in the passage and movable between an open and a closed position to control the flow of air therethrough. The apparatus comprises an evacuable chamber and a first fluid flow path extends between the air passage and the chamber and a second fluid flow path extends between the chamber and the fuel bowl. The first fluid flow path is unblocked and the second fluid flow path is blocked when the engine is running whereby the chamber is evacuated and a vacuum is created therein and the first fluid flow path is blocked and the second fluid flow path is unblocked when the engine is not running whereby fuel vapors in the fuel bowl are drawn off to the chamber by the vacuum created therein thereby venting the fuel bowl.
REFERENCES:
patent: 2986133 (1961-05-01), Mattson
patent: 3001519 (1961-09-01), Dietrich et al.
patent: 3460522 (1969-08-01), Kittler et al.
patent: 3545418 (1970-12-01), Ballou
patent: 3548797 (1970-12-01), Hagibara
patent: 3759234 (1973-09-01), Bucklon et al.
patent: 4013054 (1977-03-01), Balsley et al.
patent: 4085721 (1978-04-01), Vardi et al.
"Evaporative Control Device," Esso Research & Engr. Co., paper on Hot Soak.
ACF Industries Incorporated
Casey Edward H.
Myhre Charles J.
Nelli R. A.
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