Patent ID: 8171924

Claim:
A variable open-closed crankcase breather system for a vehicle having an engine emitting blow-by gas and a turbocharger compressor, the system comprising: a valve disposed in downstream fluid communication with the engine to receive blow-by gas, a closed system outlet of the valve in upstream fluid communication with respect to the turbocharger compressor; an open system outlet of the valve in upstream fluid communication with an atmosphere; and a valve actuator configured to actuate the valve, wherein the valve is selectively moveable to a closed system position permitting a flow of blow-by gas out the closed system outlet and to the turbocharger compressor, and is selectively moveable to an open system position permitting a flow of blow-by gas out the open system outlet and to the atmosphere, wherein the valve actuator switches the valve to the open system position when the pressure in the turbocharger compressor reaches a predetermined level.