Air/fuel ratio sensor

Details Air/fuel ratio sensor Air/fuel ratio sensor

1988-07-29

1993-03-16

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, 204427, G01N 2741, G01N 27409

Patent

active

051941350

ABSTRACT:
An air/fuel ratio sensor is described, comprising an oxygen concentration electrochemical cell and an oxygen pump disposed in a face-to-face relationship with a gap being formed therebetween, the side of said electrochemical cell opposite the side facing said oxygen pump being in contact with the atmosphere, said gap forming a gas diffusion compartment that communicates with a gas to be analyzed by a gas diffusion limiting means, wherein the gap existing between said oxygen concentration electrochemical cell and said oxygen pump has a width of no more than 0.22 mm and no less than 0.01 mm.

REFERENCES:
patent: 4294679 (1981-10-01), Maurer et a.l.
patent: 4502939 (1985-03-01), Holfelder et al.
patent: 4505806 (1985-03-01), Yamada
patent: 4505807 (1985-03-01), Yamada
patent: 4568443 (1986-02-01), Asayama et al.
patent: 4591421 (1986-05-01), Yamada et al.
patent: 4610741 (1986-09-01), Mase et al.
patent: 4769123 (1988-09-01), Mase et al.

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