Air-fuel ratio sensor

Details Air-fuel ratio sensor Air-fuel ratio sensor

1997-02-06

1998-06-09

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204427, G01N 27407

Patent

active

057627711

ABSTRACT:
An air-fuel ratio sensor comprises an oxygen concentration sensing element, a housing for holding this oxygen concentration sensing element, and protecting covers with gas holes. The protecting covers comprises an inside cover disposed closely to the oxygen concentration sensing element, and an outside cover surrounding the outside cover. Flange-like peripheral portions, formed on the protecting covers, are fixed to the abutting face of the housing by a caulking operation. These flange-like peripheral portions are disposed alternately along a same closed curve around the oxygen concentration sensing element, so that they are not overlapped with each other.

REFERENCES:
patent: 4040930 (1977-08-01), Dillon
patent: 4116797 (1978-09-01), Akatsuka
patent: 4569748 (1986-02-01), Yamakawa et al.
patent: 4683049 (1987-07-01), Nakajima et al.
patent: 4915815 (1990-04-01), Shibata et al.
patent: 5073247 (1991-12-01), Weyl
patent: 5238552 (1993-08-01), Kato et al.

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