Oxygen sensor deterioration-detecting device for internal combus

Details Oxygen sensor deterioration-detecting device for internal combus Oxygen sensor deterioration-detecting device for internal combus

1993-07-28

1995-03-14

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 123688, F01N 320

Patent

active

053967658

ABSTRACT:
The air-furl ratio of an air-fuel mixture supplied to an internal combustion engine is controlled in response to an output from at least one oxygen sensor arranged in an exhaust passage for detecting concentration of oxygen present in exhaust gases. The deterioration of the at least one oxygen sensor is detected based on the output therefrom. When the engine is detected to be in a predetermined abnormal operating state, it is not permitted to monitor the output from the oxygen sensor for detecting deterioration thereof.

REFERENCES:
patent: 5158059 (1992-10-01), Kuroda
patent: 5212947 (1993-05-01), Fujimoto

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