Crankcase ventilating system, flow control device therefor and method of making the same

摘要

A crankcase ventilating system for an internal combustion engine, a flow control device therefor and method of making the same are provided, the device comprising a valve housing having an inlet and an outlet and an annular valve seat therein intermediate the inlet and the outlet, a movable valve member disposed in the housing and having a body portion disposed on the inlet side of the valve seat and a generally frusto-conical flow metering portion for cooperating with the valve seat to control fluid flow therethrough, and a spring disposed in the housing and being operatively associated with the housing and the valve member to tend to urge the body portion of the valve member away from the valve seat, the valve member having fin structure adjacent the metering portion and on the outlet side of the valve seat that cooperates with the housing to tend to prevent vibration of the valve member during fluid flow through the valve seat.