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:
Sep. 29, 2020
Filed:
Nov. 02, 2018
Denso Corporation, Kariya-shi, Aichi, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Iwata-shi, Shizuoka, JP;
Minoru Hotta, Kariya, JP;
Yoshihiko Nonogaki, Kariya, JP;
Hisatoshi Kinoshita, Iwata, JP;
Yo Aramaki, Iwata, JP;
Kazuteru Iwamoto, Iwata, JP;
DENSO CORPORATION, Kariya-shi, Aichi, JP;
YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata-shi, Shizuoka, JP;
Abstract
A misfire determination device includes: a combustion fluctuation canceled value acquisition unit that acquires a first combustion fluctuation canceled value corresponding to a first angle position and a second combustion fluctuation canceled value corresponding to a second angle position; a combustion fluctuation manifested value calculation unit that calculates a first fluctuation manifested value by removing the first combustion fluctuation canceled value from a rotation speed at the first angle position, and calculates a second fluctuation manifested value by removing the second combustion fluctuation canceled value from a rotation speed at the second angle position; a first-order difference calculation unit that calculates a first-order difference between the first fluctuation manifested value and the second fluctuation manifested value; and a specific cylinder misfire determination unit that determines a misfire in a specific cylinder by using the first-order difference.