Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1993-05-19
1995-08-15
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123520, 137202, F02D 4122
Patent
active
054410312
ABSTRACT:
A vent passage communicated to an upper space of a fuel tank mounted on an automobile is connected to a canister. A two-way valve, which includes a pair of one-way valves disposed oppositely and in parallel to each other, is provided in the vent passage. One one-way valve is adjusted its valve opening pressure in a two-staged manner according to the operational state of an internal combustion engine. In another method, a bypass passage bypassing the two-way valve is provided in the vent passage. A solenoid valve and a one-way valve are interposed in the bypass passage. The above one one-way valve of the two-way valve is set at a first valve opening set-up pressure, and the other one-way valve is set at a second valve opening set-up pressure lower than the first valve opening set-up pressure. The solenoid valve is opened or closed according to the operational state of the internal combustion engine.
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Baba Shigeki
Kaseyama Hideki
Kitagawa Hiroshi
Kiyomiya Takashi
Sawada Kenichi
Honda Giken Kogyo Kabushiki Kaisha
Moulis Thomas N.
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