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:
Jun. 27, 2017
Filed:
Feb. 29, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Akihide Ito, Nagoya, JP;
Daisuke Inoue, Toyota, JP;
Mitsuhiro Fukao, Toyota, JP;
Kenji Matsuo, Toyota, JP;
Hiroki Kondo, Miyoshi, JP;
Motonori Kimura, Toyota, JP;
Kazuya Sakamoto, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo, JP;
Abstract
When there is a failure in a speed ratio control linear solenoid valve, or the like, a controller for a vehicle power transmission system establishes a state where torque is transmitted via a gear mechanism, and, in this state, determines whether the speed ratio control linear solenoid valve, or the like, has returned to a normal state by comparing a target speed ratio and actual speed ratio of a continuously variable transmission with each other. It is determined whether the speed ratio control linear solenoid valve, or the like, has returned to the normal state by changing the target speed ratio of the belt-type continuously variable transmission and then comparing the target speed ratio with the actual speed ratio. Thus, when the speed ratio control linear solenoid valve, or the like, has returned from a fail-safe state to the normal state, a feeling of strangeness of a driver is suppressed.