Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1992-02-28
1992-12-15
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123519, F02M 3302
Patent
active
051707659
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.
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Hidano Koichi
Hoshino Hideki
Udagawa Masatoshi
Watanabe Hideo
Argenbright Tony M.
Honda Giken Kogyo Kabushiki Kaisha
Moulis Thomas N.
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