Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1993-03-30
1994-07-26
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123518, F02M 3704
Patent
active
053319389
ABSTRACT:
An evaporative emission control system for an internal combustion engine controls purging of evaporative fuel into the intake pipe of the engine. A first control valve is arranged in a communication passage communicating between a charcoal canister and the intake pipe, for supplying the evaporative fuel to the engine at a flow rate dependent on load on the engine. A second control valve is arranged in a bypass passage bypassing the first control valve for supplying the evaporative fuel to the engine at a predetermined flow rate. When a temperature of the engine is below a predetermined value, the first control valve is closed and at the same time the second control valve is made open, to thereby supply the evaporative fuel to the engine at the predetermined i.e. small flow rate. For a predetermined time period after the engine has been warmed up, the first and second control valves are controlled in the same manner. When the engine is idling as well, the same control of the two valves is carried out.
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Kitagawa Hiroshi
Kitajima Shinichi
Kobayashi Yoshihiko
Muramatsu Hiroaki
Takanohashi Toshikatu
Honda Giken Kogyo K.K.
Lessler Arthur L.
Miller Carl S.
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