Speed-responsive valve control for intake manifold to crankcase in internal combustion engine

Claim 1

In an internal combustion engine for driving a vehicle: said engine having an intake manifold and a crankcase, said crankcase being substantially sealed off from the atmosphere; conduit means interconnecting the intake manifold and the crankcase; a normally closed valve means in said conduit means for controlling communication between the intake manifold and the crankcase; an electro-magnetic actuator coupled to said valve means for moving said valve means to an open or closed position; switch means for energizing said actuator to move said valve to a desired position, said switch means including a switch member movable between an activating and deactivating position; means responsive to vehicle speed for activating and deactivating said switch means and for controlling communication between said intake manifold and the crankcase, said means responsive to vehicle speed comprising a speed responsive device having a shaft rotatable responsive to vehicle speed and a disc cam adjustably secured to said shaft, said disc cam having a peripheral surface which is disposed for cooperative operative engagement with said switch member, said disc cam having a lobed peripheral surface portion to move said switch member to an activating position so as to, in turn, energize the actuator to close the valve means at a predetermined vehicle speed.