Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1994-11-30
1996-01-02
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
12317916, F02M 3704
Patent
active
054799040
ABSTRACT:
Plural canisters adsorb fuel vapor generating from a fuel tank (and a float chamber) while an engine stops. Purge means purge fuel vapor adsorbed in one or more canisters selected to be purged when the engine has been started. Unselected canister(s) is additionally selected as an object(s) for purging as the time elapses after the starting of the engine. At the initial purging stage, only fuel vapor adsorbed in the selected canister(s) is purged and gradually supplied to an inspire system, so as to prevent the air-fuel ratio from being over-rich especially at the start of the engine. Other canister(s) is subjected to purging thereafter, and eventually the fuel vapors adsorbed in all canisters are purged at the same time. Purging canister(s) is done in a short time and is made rather even.
REFERENCES:
patent: 3515107 (1970-06-01), Joyce
patent: 3575152 (1971-09-01), Wentworth
patent: 4811718 (1989-03-01), Sonoda
patent: 4867126 (1989-09-01), Yonekawa
patent: 4951643 (1990-08-01), Sato
patent: 5224456 (1993-07-01), Hosoda
patent: 5398660 (1995-03-01), Koyama
Fujimori Yoshitomo
Mihara Hiroaki
Honda Giken Kogyo Kabushiki Kaisha
Miller Carl S.
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