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:
Mar. 03, 2020
Filed:
Apr. 17, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Hideki Hagari, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Abstract
To provide a controller and control method for an internal combustion engine capable of estimating a discharge plasma length and the in-cylinder flow speed accurately by easy method. A controller and a control method for an internal combustion engine detects a secondary voltage which is a voltage generated by the secondary coil, calculates a minimum value of secondary voltage during a discharge period, calculates a discharge plasma length based on the secondary voltage and the minimum value of secondary voltage, and calculates an in-cylinder flow speed based on a time change of the discharge plasma length and a Coulomb force.