Air-fuel ratio control system for an internal combustion engine

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

1985-02-07

1986-10-21

Cuchlinski, Jr., William A.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, 123589, F02M 2304

Patent

active

046179003

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine having an oxygen concentration sensor disposed in the exhaust system of the engine is provided with means for detecting a high load operation of the engine and an air-fuel ratio control signal is produced by comparing an output signal of the oxygen sensor with a first reference level corresponding to a stoichiometric value of the air-fuel ratio when the engine is operating under medium or low load condition and with a second reference level corresponding to an air-fuel ratio which is on the leaner side of the stoichiometric value when the engine is operating under the high load condition.

REFERENCES:
patent: 4434768 (1984-03-01), Ninomiya
patent: 4478191 (1984-10-01), Kinoshita et al.
patent: 4478192 (1984-10-01), Kinoshita et al.
patent: 4561403 (1985-12-01), Oyama et al.

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