PCV system with a check valve device

Details PCV system with a check valve device PCV system with a check valve device

1990-08-02

1991-07-02

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

137854, 13751613, F02M 2500

Patent

active

050277847

ABSTRACT:
A PCV system with a check valve device oriented in a vertical direction and including a valve body, a seat member, and a stopper plate. The valve body includes a valve head constructed of elastomer. The seat member includes a valve seat surface on a lower surface thereof. The seat member further includes at least one perforation which opens into the lower surface. The valve head of the valve body is disposed below the valve seat surface so as to resiliently contact the valve seat surface when no differential pressure acts on the valve. A stopper plate is disposed between the lower surface of the seat member and the valve head of the valve body. The stopper plate prevents the valve head from being excessively deformed into the perforation to cause cracks to develop in the valve head. As a result, the durability of the check valve device is improved.

REFERENCES:
patent: 4513784 (1985-04-01), Farrand et al.
patent: 4549520 (1985-10-01), Tamba et al.
patent: 4593672 (1986-06-01), Barone
patent: 4711224 (1987-12-01), Eckhardt

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