Air-fuel ratio control for internal combustion engine

Details Air-fuel ratio control for internal combustion engine Air-fuel ratio control for internal combustion engine

1982-07-14

1984-08-21

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123489, 123480, F02B 300, F02M 700

Patent

active

044664109

ABSTRACT:
In an air-fuel ratio control system for an internal combustion engine, the basic fuel injection amount computed from engine parameters such as engine speed and intake air flow is corrected by using map having air-fuel ratio compensation data stored battery back-up in accordance with the engine parameters. The compensation data is read out of the map in accordance with the parameters at the time of detection of the stable combustion state of the engine. When an output of an oxygen sensor is on lean side, a predetermined amount is added to the data thus read, while when the output of the oxygen sensor is on rich side, a predetermined amount is subtracted from the data thus read, thereby renewing the stored value.

REFERENCES:
patent: 4130095 (1978-12-01), Bowler
patent: 4200064 (1980-04-01), Engele
patent: 4235204 (1980-11-01), Rice
patent: 4271804 (1981-06-01), Bianchi
patent: 4279230 (1981-07-01), Baur
patent: 4319451 (1982-03-01), Tajima et al.

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