Method for controlling air-fuel ratio in internal combustion eng

Details Method for controlling air-fuel ratio in internal combustion eng Method for controlling air-fuel ratio in internal combustion eng

1985-01-10

1987-01-06

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, 123493, F02D 4114

Patent

active

046338403

ABSTRACT:
Air-fuel ratio control of an internal combustion engine is performed using sensors for detecting operating conditions of the engine, such as the intake air amount, engine rotational speed, or air-fuel ratio; a fuel injection valve driven by an electrical signal to inject fuel; and a control circuit for receiving signals from the operating condition sensors, performing predetermined operations and generating an electrical signal for driving the fuel injection valve. The control circuit performs a step of calculating an air-fuel ratio variation D(A/F) with respect to an optimum air-fuel ratio based on the ratio of a change .DELTA.F, of an air-fuel ratio correction signal F during acceleration under air-fuel ratio feedback control based on a signal from the air-fuel ratio sensor, to an acceleration amount A, and a step of controlling a transient fuel correction ratio f(AEW) based on the obtained air-fuel ratio variation D(A/F).

REFERENCES:
patent: 4235204 (1980-11-01), Rice
patent: 4245605 (1981-01-01), Rice et al.
patent: 4270503 (1981-06-01), Pomerantz
patent: 4356803 (1982-11-01), Miyagi
patent: 4416237 (1983-11-01), Aoki et al.
patent: 4437446 (1984-03-01), Isomura et al.
patent: 4467769 (1984-08-01), Matsumura
patent: 4499882 (1985-02-01), Saito et al.

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