Air fuel ratio sensor

Details Air fuel ratio sensor Air fuel ratio sensor

1990-10-12

1992-12-29

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204424, 204426, 204427, 204428, 204429, G01N 2726

Patent

active

051748851

ABSTRACT:
The invention provides an air/fuel ratio sensor, including an electrochemical sensor cell and an electrochemical pump cell, which shows both a quick response and a stable limiting current. This is realized by limiting the ratio of the area a of a region A to the area b of a region B on the inner electrode of the electrochemical sensor within a specified range, 0<a/b.ltoreq.0.1. Here, the region A corresponds to a region C within a 0.5 mm distance from the end of the gas diffusion hole except on the 0.5 mm distance line on the inner electrode of the electrochemical pump cell, and the region B corresponds to a region D or the complement of the region C on the inner electrode of the electrochemical pump cell.

REFERENCES:
patent: 4505807 (1985-03-01), Yamada
patent: 4568443 (1986-02-01), Asayama et al.
patent: 4722779 (1988-02-01), Yamada et al.
patent: 4836906 (1989-06-01), Yamada et al.

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