Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1988-03-11
1989-05-02
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
123440, F02D 4114
Patent
active
048258385
ABSTRACT:
In an internal combustion engine, in which, during the lean-burn region of its operation, fuel supplied for the engine is controlled so as to make an acutal air/fuel ratio follow a predetermined lean air/fuel ratio, an air/fuel ratio control apparatus detects the amplitude of a pulsating component in an output voltage of an oxygen sensor. The pulsating component is caused by the occurence of a misfire. The control apparatus corrects a reference for the sensor output voltage in a feedback control of the air/fuel ratio in accordance with the detected amplitude of the pulsating component, whereby the stable operation of the engine can be secured irrespective of the aged change of the stable combustion limit of the engine.
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Osuga Minoru
Oyama Yoshishige
Hitachi , Ltd.
Wolfe Willis R.
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