Air-fuel ratio controlling method and apparatus for an internal

Details Air-fuel ratio controlling method and apparatus for an internal Air-fuel ratio controlling method and apparatus for an internal

1985-01-18

1987-07-21

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123491, F02D 4114

Patent

active

046810773

ABSTRACT:
A method and apparatus for controlling an air-fuel ratio for an engine, in which a closed-loop control and an open-loop control are performed selectively in accordance with the operating condition of the engine. The closed-loop control determines an air-fuel ratio of the mixture to be supplied to a combustion chamber on the basis of the oxygen concentration within the exhaust gas. The open-loop control determines an air-fuel ratio of the mixture by modifying the air-fuel ratio determined in the closed-loop control in a manner that the former one is lean by a predetermined ratio than the latter one.

REFERENCES:
patent: 4321903 (1982-03-01), Kondo et al.
patent: 4392471 (1983-07-01), Miyagi et al.
patent: 4498445 (1985-02-01), Hasegawa et al.
patent: 4526001 (1985-07-01), Burns et al.

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