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:
Sep. 26, 2017
Filed:
Nov. 16, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Koji Hokoi, Toyota, JP;
Takaharu Hori, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
In motor double-drive mode, a first rotation speed and a second rotation speed as a drive shaft rotation speed are calculated from rotation speeds of motors on the assumption that an engine rotation speed is zero. A state where a difference between the first rotation speed and the second rotation speed is larger than a threshold continues, and, when a malfunction counter becomes larger than a threshold, it is determined that there is a malfunction in a one-way clutch or pinion gears. At a start of the engine, it is determined that there is a malfunction in the one-way clutch when the engine rotation speed is normally increasing, and it is determined that there is a malfunction in the pinion gears when the engine rotation speed is not normally increasing.