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. 24, 2010
Filed:
Dec. 01, 2006
Osamu Ishikawa, Tokyo, JP;
Keiichi Enoki, Tokyo, JP;
Hideki Takubo, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In an air-fuel ratio feedback control device for a fuel injection control system, a catalyst deterioration diagnosing means for carrying out deterioration diagnosis of the catalyst is equipped with a diagnosis permission judging means for judging permission of the deterioration diagnosis of the catalyst on the basis of a driving area of the internal combustion engine, an air-fuel ratio varying means for varying the target upstream air-fuel ratio at the catalyst deterioration diagnosis time, a catalyst deterioration judging means for judging the deterioration of the catalyst on the basis of the downstream air-fuel ratio detection output at the catalyst deterioration diagnosis time, and a catalyst deterioration diagnosis prohibiting means for setting a deterioration diagnosis prohibition time of the catalyst after the catalyst deterioration diagnosis.