Patent ID: 6058970
Filing Date: 2000-05-09
Classification: B60K,F16K,Y10T

Abstract:
A fuel vapor control apparatus comprising:a fuel tank;a filler pipe having one end connected with said fuel tank and another end cooperable with a filler cap;a canister for adsorbing fuel vapor generated in said fuel tank;a fuel vapor control valve disposed in a passage that allows communication between said fuel tank and the canister and divided into an upper chamber and a lower chamber, said fuel vapor control valve being opened or closed due to a difference in pressure between the upper chamber and the lower chamber;a fuel drop passage allowing communication between said upper chamber and said lower chamber; anda line connecting an inside of said upper chamber with a portion close to an end of said filler pipe near the filler cap,wherein said fuel vapor control valve has a valve mechanism that opens said fuel drop passage when substantially equal pressures are applied to said upper chamber and said lower chamber and closes said fuel drop passage when said lower chamber is higher in pressure than said upper chamber, before the fuel vapor control valve is opened.