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:
Apr. 30, 2013
Filed:
Mar. 26, 2010
Tomohiro Wakazono, Konan, JP;
Seiji Oya, Niwa-gun, JP;
Tomohiro Wakazono, Konan, JP;
Seiji Oya, Niwa-gun, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A gas sensor includes a gas sensor element. The gas sensor element includes a first detection chamber; a first oxygen pumping cell including a first solid electrolyte body and a pair of first electrodes; a second detection chamber; a second oxygen pumping cell including a second solid electrolyte body and a pair of second electrodes; and an oxygen-concentration sensing cell including a third solid electrolyte body and a pair of third electrodes. A sensing electrode of the third electrodes is disposed downstream beyond a first inner electrode of the first electrodes relative to a gas flow direction. A cross-sectional area of a space of the first detection chamber which faces the first inner electrode falls within a range from 0.03 mmto 0.22 mm. A center of the sensing electrode is located downstream beyond a downstream end of the first inner electrode to cause a distance between the center of the sensing electrode and the downstream end of the first inner electrode to be greater than or equal to ten times magnitude of a height of the space.