Supplemental air valve for internal combustion engine
A valve for attachment in the PCV system of an internal combustion engine for regulating the admission of supplemental air to the crank case blow-by return, comprising: (a) a valve body defining a bore, the body having an inlet and an outlet connection defining a passageway through the valve for the blow-by return, the body further defining a port for air; (b) a valve member reciprocal within the bore having a piston member dividing at least a portion of the bore into two pressure chambers, the pressure chambers having means for connection of each to a source of engine vacuum; (c) the valve member being shiftable from and open position permitting air to enter through the port to the passageway and having a closed position blocking admission of air through the port to the passageway; and (d) resilient means normally urging the valve body to the closed position, the resilient means being selectively adjustable to provide a predetermined biasing force whereby the piston is shiftable to the open position in response to changes in engine vacuum to admit supplemental air to the engine.
- Assignee:
- NOV; NOV-88-001156; EDB-88-072991
- Patent Number(s):
- US 4715351
- OSTI ID:
- 5313301
- Resource Relation:
- Patent File Date: Filed date 25 Aug 1986
- Country of Publication:
- United States
- Language:
- English
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