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:
Aug. 11, 2020
Filed:
Mar. 13, 2019
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Denso Ten Limited, Kobe-shi, Hyogo, JP;
Kyohei Suzumura, Nagoya, JP;
Shinya Toyoda, Nisshin, JP;
Masayuki Tsujita, Okazaki, JP;
Tetsuya Okumura, Kobe, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
DENSO TEN LIMITED, Kobe, JP;
Abstract
A controller of a power transmission system for a vehicle includes an electronic control unit. When a difference between a secondary pressure set by use of a command pressure of the electromagnetic control valve for the secondary pulley, and an actual pressure obtained by a hydraulic pressure sensor, is larger than a predetermined pressure difference, the electronic control sets a primary pressure and the secondary pressure such that a speed ratio of a continuously variable transmission becomes substantially equal to a maximum value. The electronic control unit determines that there is an abnormality that an output pressure of the electromagnetic control valve for a secondary pulley is low, when the speed ratio is smaller than a predetermined first determination value, and determines that there is an abnormality in the hydraulic pressure sensor, when the speed ratio is larger than a predetermined second determination value.