Ventilation check valve for internal combustion engines

Details Ventilation check valve for internal combustion engines Ventilation check valve for internal combustion engines

1981-08-21

1983-02-15

Lazarus, Ronald H.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

251 611, 137110, F02M 2700

Patent

active

043734995

ABSTRACT:
A suction-limiting check valve for a crankcase ventilating line which is connected to the engine intake downstream of the carburetor, the valve having two valve devices arranged for parallel operation, each including a spring-biased diaphragm which closes against a valve mouth at a predetermined level of negative pressure, one valve mouth being much smaller than the other to produce an earlier reopening of that valve device under elevated suction on the outlet side of the valve.

REFERENCES:
patent: 1286930 (1918-12-01), Buckner
patent: 3635248 (1972-01-01), Klee
patent: 3754538 (1973-08-01), Ephraim
patent: 3766898 (1973-10-01), McMullen

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