The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2002
Filed:
Jul. 07, 1999
Nobuhide Kato, Ama-Gun, JP;
Kunihiko Nakagaki, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
Disclosed are a gas sensor and a nitrogen oxide sensor each comprising a first diffusion rate-determining section for giving a predetermined diffusion resistance to a measurement gas to be introduced into a first chamber, the first diffusion rate-determining section being formed with a slit having a laterally extending aperture formed at a front end portion of a second spacer layer to make contact with the lower surface of a second solid electrolyte layer in which the aperture is formed to extend with an identical aperture width up to the first chamber, and a slit having a laterally extending aperture formed at a front end portion of the second spacer layer to make contact with the upper surface of a first solid electrolyte layer in which the aperture is formed to extend with an identical aperture width up to the first chamber. The slits have a substantially identical cross-sectional configuration, in which the length in the vertical direction is not more than 10 &mgr;m, and the length in the lateral direction is about 2 mm. Accordingly, it is possible to avoid the influence of the pulsation of the exhaust gas pressure generated in the measurement gas, and it is possible to improve the measurement accuracy obtained on the detecting electrode.