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:
Feb. 26, 2019
Filed:
Dec. 14, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Yukihiro Nakasaka, Suntou-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
An internal combustion engine having a plurality of cylinders comprises a variable compression ratio mechanism A able to change a mechanical compression ratio. The control device comprises a compression ratio detector for detecting a mechanical compression ratio based on a value of the relative position parameter representing a relative positional relationship between the cylinder blockand a pistonand a compression ratio controller for feedback controlling the mechanical compression ratio so that the mechanical compression ratio becomes a target mechanical compression ratio. In feedback controlling the variable compression ratio mechanism, the compression ratio controller does not use the mechanical compression ratio detected by the compression ratio detector when a crank angle is in a predetermined crank angle range including a time period where the cylinder pressure is equal to or greater than a preset predetermined pressure at least at one cylinder among the plurality of cylinders.