Oxygen concentration detector

Details Oxygen concentration detector Oxygen concentration detector

1982-05-20

1985-03-19

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204412, 204426, 204427, 219505, 219553, G01N 2746

Patent

active

045058024

ABSTRACT:
An oxygen concentration detector comprises an oxygen ion conductive solid electrolyte and electrodes provided thereon to form an oxygen concentration cell for detecting oxygen partial pressure in a gas such as exhaust gas from an internal combustion engine. The oxygen concentration detector according to the invention further comprises an AC power source supplying to the electrodes an AC having a frequency at which a polarization of AC component is caused mainly due to a polarization of the solid electrolyte to detect an impedance of the solid electrolyte and the electromotive force of the oxygen concentration cell.

REFERENCES:
patent: 3924098 (1975-12-01), Dunn
patent: 4101454 (1978-07-01), Kulwicki et al.
patent: 4107019 (1978-08-01), Takao et al.
patent: 4145272 (1979-03-01), Nakamura
patent: 4167163 (1979-09-01), Moder
patent: 4265724 (1981-05-01), Haecker
patent: 4293838 (1981-10-01), Wahlers et al.
patent: 4321577 (1982-03-01), Carlson
patent: 4407704 (1983-10-01), Mase et al.

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