Air-fuel ratio control apparatus

Details Air-fuel ratio control apparatus Air-fuel ratio control apparatus

1983-05-04

1985-06-11

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02D 3300

Patent

active

045221804

ABSTRACT:
An air-fuel ratio control apparatus in which air-fuel ratio detecting signal represents air-fuel ratio in a combustion chamber and an integrated amount increased or decreased in relation to the air-fuel ratio detecting signal is calculated from the air-fuel ratio detecting signal on the basis of parameters to correct fuel amount supplied to an intake system on the basis of the integrated amount. The frequency of the air-fuel ratio detecting signal when the air-fuel ratio in the combustion chamber reaches a predetermined value is defined as the basic frequency. To compensate for change with the passage of time in the output characteristics of an air-fuel ratio detecting sensor, said parameter value is corrected so that the frequency of the air-fuel ratio detecting signal becomes the basic frequency.

REFERENCES:
patent: 4167925 (1979-09-01), Hosaka et al.
patent: 4324218 (1982-04-01), Hattori et al.
patent: 4338900 (1982-07-01), Dilger et al.

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