Air-to-fuel ratio control apparatus for an internal combustion e

Details Air-to-fuel ratio control apparatus for an internal combustion e Air-to-fuel ratio control apparatus for an internal combustion e

1996-06-21

1998-06-09

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123688, 123696, 60276, 60277, 60284, F02D 4104, F02D 4114, F01N 320

Patent

active

057620555

ABSTRACT:
An air-to-fuel ratio control apparatus for an internal combustion engine includes an air-to-fuel ratio sensor of a current limiting type for detecting an air-to-fuel ratio of an air-fuel mixture from a condition of exhaust gas originating from the air-fuel mixture. An air-to-fuel ratio controlling device is operative for performing feedback control in response to an output signal of the air-to-fuel ratio sensor so that the detected air-to-fuel ratio will be substantially equal to a target air-to-fuel ratio. A gain setting device is operative for setting a feedback gain of the air-to-fuel ratio feedback control in response to an atmospheric pressure.

REFERENCES:
patent: 4501242 (1985-02-01), Nimi et al.
patent: 4651700 (1987-03-01), Kobayashi et al.
patent: 4656829 (1987-04-01), Creps et al.
patent: 4694803 (1987-09-01), Asakura et al.
patent: 4814997 (1989-03-01), Matsumura et al.
patent: 4926828 (1990-05-01), Fujimoto et al.
patent: 5475975 (1995-12-01), Nasu

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