Apparatus for controlling air-fuel ratio in internal combustion

Details Apparatus for controlling air-fuel ratio in internal combustion Apparatus for controlling air-fuel ratio in internal combustion

1985-07-22

1986-11-25

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, 123480, 123486, F02M 5100

Patent

active

046242325

ABSTRACT:
In an apparatus for the feedback control of the air-fuel ratio in an internal combustion engine using the output signal of an air-fuel ratio sensor, a degree of deterioration of the functioning of the air-fuel ratio sensor is detected by using successive measurements of a differential waveform of an output signal of the air-fuel ratio sensor over a predetermined period of time, and an air-fuel ratio feedback control constant is controlled in accordance with the degree of functional deterioration of the air-fuel ratio sensor to correct the air-fuel ratio.

REFERENCES:
patent: 4121548 (1978-10-01), Hattori et al.
patent: 4177787 (1979-12-01), Hattori et al.
patent: 4344317 (1982-08-01), Hattori et al.
patent: 4502444 (1985-03-01), Rubbo et al.
patent: 4509489 (1985-04-01), Hasegawa et al.
patent: 4517948 (1985-05-01), Kaji et al.
patent: 4528957 (1985-07-01), Jundt et al.
patent: 4542729 (1985-09-01), Yamato et al.

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