Fuel tank for use in a motor vehicle

Claim 1

A fuel tank for use in a motor vehicle, comprising: a canister housing located at a fuel inlet position of said fuel tank and having a thick wall at an upper end thereof, said thick wall having a threaded bore formed therein and a flat inner face defining a first valve seat, said canister housing having an activated carbon contained therein; a fuel inlet pipe connected to said fuel tank and having an upper portion located in said canister housing and aligned with said threaded bore, said upper portion having an upper end portion which is slightly spaced from said first valve seat and has a diameter larger than that of said threaded bore, said upper end portion defining a second valve seat; a cap removably screwed into said threaded bore; and a valve body made of a resilient material and arranged in said upper portion of said fuel inlet pipe, said valve body having a lower end portion fixed to an inner wall of said fuel inlet pipe and having an annular flat upper end valve portion which is located between said first valve seat and said second valve seat and cooperating with a lower end portion of said cap for seating said valve portion on said second valve seat when said cap is screwed into said threaded bore and for seating said valve portion on said first valve seat due to the resiliency of said valve body when said cap is unscrewed, said upper portion of said fuel inlet pipe and said valve body defining therebetween a fuel vapor passage which is continuously connected to an interior of said fuel tank and is connected to said canister housing via a clearance formed between said valve portion and said second valve seat when said cap is unscrewed.