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:
Jan. 29, 2013
Filed:
Dec. 23, 2008
Yusuke Ogata, Toyota, JP;
Toshihiro Aoyama, Okazaki, JP;
Yusuke Ogata, Toyota, JP;
Toshihiro Aoyama, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve () that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve () that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley () at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (); and an orifice () that is provided in an oil passage () between the fail-safe valve () and the drive pulley (). Then, a hydraulic pressure in the oil passage () on the drive pulley () side of the orifice () is supplied to the first sheave pressure regulating valve () as a feedback pressure.