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:
Oct. 10, 2006
Filed:
Apr. 23, 2004
Applicants:
Akira Kiyomura, Atsugi, JP;
Masanobu Ohsaki, Atsugi, JP;
Hisanori Ozaki, Tokyo, JP;
Inventors:
Assignees:
Hitachi Unisia Automotive, Ltd., Kanagawa, JP;
Fuji Heavy Industries Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Whether a misfire occurred is judged based on a comparison between diagnosis data that indicates a variation of an engine rotation speed and a threshold based on engine operating conditions. The threshold is corrected based on data that indicates an average correlation between the diagnosis data and the threshold.