Air/fuel ratio sensor

Details Air/fuel ratio sensor Air/fuel ratio sensor

1986-02-25

1990-06-19

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204412, 204426, 204429, G01N 2746

Patent

active

049351192

ABSTRACT:
An air/fuel ratio sensor is described, comprising an oxygen pump element composed of a solid electrolyte having a pair of electrodes on opposite sides thereof, a gas diffusing section section that is in contact with one electrode on said oxygen pump element and which accepts a limited inflow of a gas to be analyzed, and an oxygen gas detecting element that is based on a transition metal oxide disposed within said gas diffusing section, the resistance of which varies in proportion to the partial pressure of oxygen gas in the gas to be analyzed.

REFERENCES:
patent: 3791936 (1974-02-01), Pebler et al.
patent: 4225559 (1980-09-01), Achari et al.
patent: 4304652 (1981-12-01), Chiba et al.
patent: 4322383 (1982-03-01), Yashda et al.
patent: 4416763 (1983-11-01), Fujishiro
patent: 4498968 (1985-02-01), Yamada et al.
patent: 4502939 (1985-03-01), Holfelder et al.
patent: 4505803 (1985-03-01), Mase et al.
patent: 4578172 (1986-03-01), Yamada et al.

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