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:
May. 29, 2012
Filed:
Nov. 22, 2006
Seiji Oya, Aichi, JP;
Tomohiro Wakazono, Kounan, JP;
Koji Shiotani, Kasugai, JP;
Tomonori Kondo, Kounan, JP;
Mineji Nasu, Kounan, JP;
Hiroshi Kubota, Wako, JP;
Kazuo Yanada, Wako, JP;
Koichi Awano, Wako, JP;
Seiji Oya, Aichi, JP;
Tomohiro Wakazono, Kounan, JP;
Koji Shiotani, Kasugai, JP;
Tomonori Kondo, Kounan, JP;
Mineji Nasu, Kounan, JP;
Hiroshi Kubota, Wako, JP;
Kazuo Yanada, Wako, JP;
Koichi Awano, Wako, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A gas sensor controllerstops an operation of pumping in or out oxygen that is being performed by a first pump cellin a state that the oxygen concentration (oxygen partial pressure) of a gas to be measured is equal to a status judgment reference value (20%). The gas sensor controllercalculates an oxygen pressure in a second measurement chamberon the basis of a second pump current Ip. If the oxygen pressure in the second measurement chamberis equal to a deterioration judgment reference value, the gas sensor controllerjudges that the second pump cellis in a normal state. If the oxygen pressure in the second measurement chamberis different from the deterioration judgment reference value, the gas sensor controllerjudges that the second pump cellis in a deteriorated state.