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:
Jan. 13, 2026
Filed:
Jun. 02, 2022
Mitsubishi Heavy Industries Engine & Turbocharger, Ltd., Kanagawa, JP;
Ryo Sase, Tokyo, JP;
Ko Takayanagi, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER. LTD., Sagamihara, JP;
Abstract
A misfire detecting device for an internal combustion engine, having a plurality of cylinders is provided with: a pulsation component acquiring unit for performing a frequency analysis of operating parameter data indicating a change over time in an operating parameter correlated with an overall operating state of the plurality of cylinders, and for acquiring a pulsation component spectrum, which is a frequency spectrum of pulsations of the internal combustion engine; a difference parameter acquiring unit for acquiring a difference parameter correlated with a degree of difference between the operations of each of the plurality of cylinders; and all-cylinder misfire determining unit for determining that an all-cylinder misfire has occurred in the internal combustion engine if the pulsation component spectrum acquired by the pulsation component acquiring unit falls below a first threshold and the difference parameter acquired by the difference parameter acquiring unitfalls below a second threshold.