Air-fuel ratio sensor for an internal combustion engine and an a

Details Air-fuel ratio sensor for an internal combustion engine and an a Air-fuel ratio sensor for an internal combustion engine and an a

1990-10-30

1993-04-20

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204424, 204425, 204428, G01N 2726

Patent

active

052039838

ABSTRACT:
An air-fuel ratio sensor which includes a sensing portion made of a solid electrolyte exposed to exhaust gas from an internal combustion engine and a microprocessor for executing a predetermined processing on the basis of an output voltage of the sensing portion to identify an air-fuel ratio of fuel mixture supplied to the engine, in which a voltage deviation is obtained between the output voltage of the sensing portion and a reference voltage, which is provided for every temperature of the sensing portion and in accordance with a target air-fuel ratio preset in advance for an air-fuel ratio control, whereby the air-fuel ratio of the fuel mixture is identified on the basis of the thus obtained voltage deviation.

REFERENCES:
patent: 4276600 (1981-06-01), Hartford et al.
patent: 4664773 (1987-05-01), Suzuki et al.
patent: 4891122 (1990-01-01), Damno et al.

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