Air-fuel ratio feedback control system

Details Air-fuel ratio feedback control system Air-fuel ratio feedback control system

1981-08-21

1984-01-17

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02D 500

Patent

active

044258950

ABSTRACT:
An air-fuel ratio feedback control system for the internal combustion engine produces a fuel supply control signal by delaying a rich or lean signal obtained by comparing the oxygen concentration in the exhaust gas with a reference value. The turning on of an idle switch operatively connected with the engine throttle valve, a predetermined time after the turning off of the idle switch and the engine speed included in a predetermined region are detected in order to delay the rich or lean signal to rich or lean side by an optimum delay time as selected according to the engine operating conditions, thus feedback controlling the amount of fuel supply.

REFERENCES:
patent: 4040394 (1977-08-01), Wahl et al.
patent: 4111162 (1978-09-01), Norimatsu et al.
patent: 4131091 (1978-12-01), Asano et al.
patent: 4173952 (1979-11-01), Asano
patent: 4178884 (1979-12-01), Norimatsu et al.
patent: 4251989 (1981-02-01), Norimatsu et al.

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