Patent ID: 6253744
Filing Date: 2001-07-03
Classification: F02D,F02M

Abstract:
A fuel vapor control apparatus for combusting fuel vapor generated in a fuel tank by an engine, comprising:a canister for adsorbing and collecting fuel vapor generated in said fuel tank;a pair of purge pipings arranged in parallel for supplying the fuel vapor from said canister to an intake system of the engine;two purge control valves mounted to said pair of purge pipings respectively, said two purge control valves being different in flow rate size from each other; anda flow control device for controlling a purge flow rate to a target purge flow rate, by varying a flow rate of a purge control valve having the larger flow rate size in a step mode, and controlling a flow rate smaller than a variation quantity in the step mode, by the purge control valve having the smaller flow rate size.