Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1978-03-17
1979-12-18
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123136, F02M 2506
Patent
active
041788940
ABSTRACT:
Inside the fuel tank of a small engine liquid fuel system is a buffer chamber that has its interior communicated with the rest of the tank interior only through a small upper air vent and a restricted bottom fuel port. During fueling, fuel enters the buffer chamber slowly and continues to enter it after the tank is apparently full, lowering the fuel level sufficiently to prevent seepage through the tank cap. The engine crankcase is vented to the carburetor air induction passage through a breather check valve in the carburetor body. A first valve, responsive to pressure differences between the atmosphere and the tank interior, vents overpressures in the tank to the crankcase. A second valve, responsive to the difference between tank pressure and subatmospheric cranckcase pressure, admits air to the tank when the engine is running.
REFERENCES:
patent: 3172348 (1965-03-01), Berg
patent: 3511218 (1970-05-01), Lazaros
patent: 3517654 (1970-06-01), Sarto et al.
patent: 3673997 (1972-07-01), Sawada
patent: 3675634 (1972-07-01), Tatsutomi et al.
patent: 3695376 (1972-10-01), Fiedler et al.
patent: 3731665 (1973-05-01), Garcea
patent: 3779224 (1973-12-01), Tagawa et al.
patent: 3884204 (1975-05-01), Krautwurst et al.
patent: 4000727 (1977-01-01), Walker
Briggs & Stratton Corporation
Burns Wendell E.
Jones Ira Milton
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