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. 05, 2019
Filed:
Dec. 18, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Masayoshi Nakagawa, Mishima, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An electronic control unit executes a deposit removal operation of removing a deposit accumulated in an intake port of an internal combustion engine. In the deposit removal operation, the temperature of an EGR gas that is recycled to an intake passage is measured or estimated. Then, a variable valve mechanism is operated such that an intake valve is opened in an expansion stroke or an exhaust stroke and the lift amount of the intake valve becomes larger as the measured or estimated temperature of the EGR gas becomes lower. Further, an external EGR device is operated such that the amount of the EGR gas that is recycled to the intake passage becomes larger as the measured or estimated temperature of the EGR gas becomes lower.