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:
Apr. 03, 2007
Filed:
Apr. 04, 2005
Koichiro Matsumoto, Kariya, JP;
Naoki Kokubo, Nukata-gun, JP;
Eiji Kogiso, Mizunami, JP;
Takashi Kawashima, Nagoya, JP;
Koichiro Matsumoto, Kariya, JP;
Naoki Kokubo, Nukata-gun, JP;
Eiji Kogiso, Mizunami, JP;
Takashi Kawashima, Nagoya, JP;
Denso Corporation, Kariya, JP;
Abstract
A misfire detector detects a misfire in a cylinder based on a maximum value and the minimum value of the angular speed. A first crank angle range is defined in such a manner as to include a crank angle in which the angular speed is maximum during a power stroke. A second crank angle range is defined in such a manner as to include a crank angle in which the angular speed is minimum during the power stroke. The maximum value of the angular speed is calculated within the first crank angle range, and the minimum value of the angular speed is calculated within the second crank angle range. The calculated maximum and minimum values are brought close to actual values to enhance a reliability of the misfire detector.