Method for controlling air/fuel ratio of fuel supply system for

Details Method for controlling air/fuel ratio of fuel supply system for Method for controlling air/fuel ratio of fuel supply system for

1986-11-20

1988-06-28

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, F02M 5100

Patent

active

047532084

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 an operational state of the engine in which the amount of the fuel to be supplied to the engine is greater than the reference level has continued for more than a predetermined time period.

REFERENCES:
patent: 4359029 (1982-11-01), Furuhashi et al.
patent: 4375797 (1983-03-01), Otsuka et al.
patent: 4467769 (1984-08-01), Matsumura
patent: 4483301 (1984-11-01), Yamada et al.
patent: 4494512 (1985-01-01), Kishi et al.

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