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:
Jul. 28, 2020
Filed:
Aug. 21, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Hideki Hagari, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Abstract
To provide a controller and a control method for an internal combustion engine capable of detecting misfire with good accuracy by simple calculation, even when a vibration in a period of about several strokes occurs in the crankshaft. A controller and a control method for an internal combustion engine detects crank angle based on an output signal of the specific crank angle sensor, and calculates a crank angle speed, a crank angle acceleration, and a crank angle jerk which is a time change rate of the crank angle acceleration; calculates a fluctuation amount of the crank angle jerk in a determination period which is set corresponding to a one combustion stroke based on the crank angle jerk; and determines a presence/absence of misfire in the one combustion stroke based on the fluctuation amount of the crank angle jerk.