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:
Aug. 07, 2007
Filed:
May. 12, 2003
Takashi Sasaki, Shioya-gun, JP;
Hiroyuki Abe, Utsunomiya, JP;
Tsuyoshi Eguchi, Utsunomiya, JP;
Yasushi Kojima, Utsunomiya, JP;
Takashi Saito, Shioya-gun, JP;
Akihiro Suzuki, Utsunomiya, JP;
Takashi Sasaki, Shioya-gun, JP;
Hiroyuki Abe, Utsunomiya, JP;
Tsuyoshi Eguchi, Utsunomiya, JP;
Yasushi Kojima, Utsunomiya, JP;
Takashi Saito, Shioya-gun, JP;
Akihiro Suzuki, Utsunomiya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A degradation diagnosis method for simply performing degradation diagnosis of a gas sensor such as a hydrogen sensor. The hydrogen sensor has a reference detector member and common detector member, with each detector member respectively constituted of a detector element and temperature compensating element that form a pair. Power is normally supplied to the common detector member, which performs concentration detection of the hydrogen gas. When performing degradation diagnosis of this common detector member, concentration detection is performed simultaneously by each detector member for the gas of the prescribed hydrogen concentration by supplying power to both the common detector member and reference detector member and comparing the output value of the common detector member and the output value of the reference detector member.