System for controlling air-fuel ratio in an internal combustion

Details System for controlling air-fuel ratio in an internal combustion System for controlling air-fuel ratio in an internal combustion

1984-06-11

1987-01-06

Lall, Parshotam S.

Boots, shoes, and leggings

123480, 123492, 36443107, F02B 300

Patent

active

046352007

ABSTRACT:
A system for controlling the air-fuel ratio in an internal combustion engine provided with a fuel injector. The system has an O.sub.2 sensor for issuing signals on two levels, one corresponding to a high air-fuel ratio, the other to a low air-fuel ratio, and a feedback control device responsive to the signal from the sensor. The feedback control calculates a correction factor for maintaining the air-fuel ratio to a desired value during steady operation and for indicating the deviation in the ratio from the desired value during transient conditions. This deviation is employed to generate a transient correction value which is selected to minimize the deviation during transient conditions.

REFERENCES:
patent: 4130095 (1978-12-01), Bowler et al.
patent: 4235204 (1980-11-01), Rice
patent: 4270503 (1981-06-01), Pomerantz
patent: 4322800 (1982-03-01), Hisegawa et al.
patent: 4469074 (1984-09-01), Takao et al.
patent: 4481928 (1984-11-01), Takimoto et al.

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