Wide range air fuel ratio sensor

Details Wide range air fuel ratio sensor Wide range air fuel ratio sensor

1986-08-18

1988-01-19

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, 204291, 204292, 204421, 204427, 427404, 4274192, G01N 2746

Patent

active

047203358

ABSTRACT:
An air-fuel ratio sensor for detecting the air-fuel ratio in intake gas introduced into an engine by way of the oxygen concentration in engine exhaust comprises an oxygen ion transmissive solid electrolyte body and first and second porous electrodes provided on opposite sides of the solid electrolyte body, the first porous electrode being adapted to be brought into contact with the exhaust. The first porous electrode is formed of a material which exhibits semi-catalytic property. Metal oxide which oxidizes HC to produce CO is provided near three-phase points at which said first electrode, the solid electrolyte body and the exhaust adjoin each other when the first electrode is brought into contact with the exhaust.

REFERENCES:
patent: 3481855 (1969-12-01), Kolodney et al.
patent: 3914169 (1975-10-01), Horowitz
patent: 3989614 (1976-11-01), Tien
patent: 4021326 (1977-05-01), Pollner et al.
patent: 4040929 (1977-08-01), Bauer
patent: 4097353 (1978-06-01), Kishida et al.
patent: 4514277 (1985-04-01), Sakurai et al.

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