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:
Dec. 10, 2024
Filed:
Jun. 15, 2023
Honda Motor Co., Ltd., Tokyo, JP;
Satoshi Kozuka, Tokyo, JP;
Jun Iida, Tokyo, JP;
Nobukazu Asano, Tokyo, JP;
Hayato Watanabe, Tokyo, JP;
Naoyuki Tanaka, Tokyo, JP;
Bumpei Nakayama, Tokyo, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
A misfire determination device, for an internal combustion engine, according to the present invention detects a combustion state parameter of the internal combustion engine, retrieves an extreme value of the combustion state parameter in an extreme value retrieval section from a start timing of a combustion stroke to a predetermined crank angle (step 5), upon retrieval of the extreme value, sets a predetermined crank angle section subsequent to a crank angle corresponding to the extreme value as a misfire determination parameter calculation section (step 6, expression 5), calculates a misfire determination parameter based on the combustion state parameter that has been detected in the misfire determination parameter calculation section (step 6), and determines a misfire based on the misfire determination parameter (steps 7 to 9).