NOTCHED DOOR VALVE FOR CONTROL OF CARBURETOR AIR AND CRANKCASE VAPORS

摘要

An air cleaner snorkel having an inlet for heated air in addition to the usual ambient air inlet at its open end and also including an inlet for vapors from the crankcase. A door-like valve controls the flow of ambient and heated air through the snorkel into the air cleaner. The door is notched to assure the presence of at least a small amount of ambient air flow through the snorkel when the door is closed or partially so with respect to the ambient air inlet thereby directing vapors from the crankcase into the air cleaner and preventing their escape out of the ambient air inlet to the atmosphere.