The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
Feb. 28, 1992
Hideki Hoshino, Tochigi, JP;
Masatoshi Udagawa, Tochigi, JP;
Hideo Watanabe, Tochigi, JP;
Koichi Hidano, Tochigi, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A fuel storage canister includes a fuel storage chamber defined in a housing and connected to a fuel tank, a first activated carbon layer disposed in said housing for adsorbing fuel vapor, a first passageway connected to said housing for venting said fuel storage chamber through said first activated carbon layer to the atmosphere, a second activated carbon layer disposed in said housing for adsorbing fuel vapor, and a second passageway connected to said housing for venting said fuel storage chamber through said first and second activated carbon layers to the atmosphere. A directional control valve is connected to said first and second passageways for selectively opening said first and second passageways depending on an operating condition of the engine. When the engine is out of operation, requiring a large amount of fuel vapor to be stored in the canister, the fuel storage chamber is vented to the atmosphere through the first and second activated carbon layers by the second passageway for thereby adsorbing the fuel vapor with the first and the second activated carbon layers. When the engine is in operation, the fuel storage chamber is vented to the atmosphere through only the first activated carbon layer by the first passageway for thereby adsorbing the fuel vapor with the first activated carbon layer, with no fuel vapor adsorbed by the second activated carbon layer.