Air-fuel ratio control system for internal combustion engines

Details Air-fuel ratio control system for internal combustion engines Air-fuel ratio control system for internal combustion engines

1997-08-28

2000-02-29

Solis, Erick R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123685, 123696, F02D 4114

Patent

active

060296410

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor arranged in the exhaust system of the engine. An ECU determines activation of the air-fuel ratio sensor and carries out feedback control of the air-fuel ratio of a mixture supplied to the engine in response to the output from the air-fuel ratio sensor. An intermediate state of the air-fuel ratio sensor corresponding to a transient state of the air-fuel ratio sensor from an inactive state thereof to an active state thereof is determined. The output from the air-fuel ratio sensor for use in execution of the feedback control is corrected when the air-fuel ratio sensor is in the intermediate state.

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