Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1985-05-21
1987-03-03
Wolfe, Jr., Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
F02M 5100
Patent
active
046466991
ABSTRACT:
A method for controlling air-fuel ratio of the mixture to be supplied to the engine detects whether or not the amount of the fuel to be supplied to the engine is greater than a reference amount. A feedback control in which the air-fuel ratio is corrected according to an oxygen concentration in the exhaust gas is performed when the amount of the fuel to be supplied to the engine is equal to or smaller than the reference level, while an open loop control in which the air-fuel ratio of the mixture is determined irrespective of the oxygen concentration is performed if the amount of the fuel to be supplied to the engine is greater than the reference level. The reference amount is changed depending on the engine rotational speed so as to eliminate the overlap of a range of the fuel increment control and a range of the feedback control and greatly improve the driveability of the engine during high load operating conditions of the engine.
REFERENCES:
patent: 4454847 (1984-06-01), Isomura et al.
patent: 4467769 (1984-08-01), Matsumura
patent: 4483301 (1984-11-01), Yamada et al.
patent: 4494512 (1985-01-01), Kishi et al.
patent: 4545355 (1985-10-01), Takao et al.
Kiuchi Takeo
Yasuoka Akimasa
Honda Giken Kogyo Kabushiki Kaisha
Wolfe, Jr. Willis R.
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