Device for controlling hydrocarbon emissions from air suction line of internal combustion (IC) engine, opens or closes butterfly valve in suction line when butterfly valve temperature is below or above given temperature

摘要

A butterfly valve (2) in a suction line (1) is turned to closed or opened positions when the detected valve temperature is above or under a given temperature, at time of engine stop. A spring-biased locking piston (13) with pointed tip engages the notch of the butterfly valve, keeping the valve completely closed. A mounting plate (9), supported relative to the valve via spring (8), resists the locking action to force the valve into a freeze protection position. An independent claim is also included for a method for controlling hydrocarbon emissions from air suction line of IC engine.