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:
Jul. 13, 2010
Filed:
Jun. 25, 2007
Yoichi Iihoshi, Tsuchiura, JP;
Shin Yamauchi, Hitachinaka, JP;
Toshio Hori, Hitachinaka, JP;
Yoshikuni Kurashima, Mito, JP;
Yoichi Iihoshi, Tsuchiura, JP;
Shin Yamauchi, Hitachinaka, JP;
Toshio Hori, Hitachinaka, JP;
Yoshikuni Kurashima, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a diagnosis apparatus for an internal combustion engine which determines the abnormality of a linear A/F sensor which is disposed on the upstream side of a catalyst of the engine and detects the A/F of exhaust gas, the apparatus includes a response/gain deterioration detection unit that separately detects the response deterioration in which the response of the linear A/F sensor is delayed and the gain deterioration in which the detection sensitivity of the linear A/F sensor is abnormal.