Air-fuel ratio control apparatus for internal combustion...

Details Air-fuel ratio control apparatus for internal combustion... Air-fuel ratio control apparatus for internal combustion...

2005-12-13

2005-12-13

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C073S023320, C123S681000, C123S688000

Reexamination Certificate

active

06973926

ABSTRACT:
In a low rotation speed and low load operation region of an internal combustion engine, the heating of an air-fuel ratio sensor by a heater is stopped, and also an air-fuel ratio feedback control is stopped, and just after the heating of the air-fuel ratio sensor by the heater and the air-fuel ratio feedback control are started, a smoothing degree of a detection signal of the air-fuel ratio sensor is set to be small, to perform the air-fuel ratio feedback control based on the smoothed detection signal.

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U.S. Appl. No. 10/895,369, filed Jul. 21, 2004, Ohkuma.

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