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. 25, 2018
Filed:
May. 08, 2015
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Takashi Miura, Nisshin, JP;
Tomohiro Chinbe, Kariya, JP;
Shuji Toyokawa, Toyota, JP;
Tomohiro Asami, Nisshin, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
There is provided an abnormality determining apparatus for a hydraulic circuit of a vehicle including: a torque converter; a hydraulic clutch; a mechanically-driven hydraulic pump (); an electrically-driven hydraulic pump (); and a solenoid valve. The abnormality determining apparatus includes an electronic control unit configured to determine which of the electrically-driven hydraulic pump and the solenoid valve has an abnormality, and configured to determine that the electrically-driven hydraulic pump has an abnormality when a turbine speed of the torque converter becomes equal to or higher than a first determination value within a prescribed period of time from rise-up of an engine speed, and determine that the solenoid valve has an abnormality when the turbine speed becomes equal to or higher than a second determination value higher than the first determination value, after a lapse of the prescribed period of time.