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. 26, 2009
Filed:
Dec. 13, 2006
Applicants:
Toshinori Tsukamoto, Wako, JP;
Mahito Shikama, Wako, JP;
Inventors:
Toshinori Tsukamoto, Wako, JP;
Mahito Shikama, Wako, JP;
Assignee:
Honda Motor Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A misfire detecting apparatus for an internal combustion engine wherein a rotational speed parameter according to a rotational speed of the engine is detected. A reference value of the rotational speed parameter is then calculated. Next, a difference between the reference value and a rotational speed parameter detected at every predetermined crank angle as a relative speed parameter is calculated. Further, an integrated value of the relative speed parameter is calculated, and a misfire determination is performed based on the calculated integrated value.