System for controlling air-fuel ratio of combustible mixture fed

Details System for controlling air-fuel ratio of combustible mixture fed System for controlling air-fuel ratio of combustible mixture fed

1988-08-08

1990-04-17

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123489, F02D 4114

Patent

active

049170678

ABSTRACT:
There is disclosed a system for controlling air-fuel ratio of a combustion mixture fed to an internal combustion engine. The system comprises an oxygen sensor disposed in an exhaust system of the engine, the oxygen sensor exhibiting a sudden characteristic change when exposed to an exhaust gas produced by a combustible mixture of stoichiometic air-fuel ratio, the oxygen sensor issuing a signal representative of the oxygen concentration in the exhaust gas; first means for substantially linearizing the signal to produce a semi-linearized signal; and second means for controlling the amount of fuel fed to the engine in accordance with the semi-linearized signal.

REFERENCES:
patent: 4019474 (1977-04-01), Nishimiya et al.
patent: 4116170 (1978-09-01), Anzai
patent: 4337745 (1982-07-01), Pomerantz

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