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:
May. 27, 2008
Filed:
Feb. 13, 2006
Kazutoshi Nozaki, Aichi-gun, JP;
Atsushi Tabata, Okazaki, JP;
Atsushi Honda, Seto, JP;
Akiharu Abe, Toyota, JP;
Yuji Inoue, Nisshin, JP;
Hirofumi Ota, Toyota, JP;
Atsushi Kamada, Toyota, JP;
Kazutoshi Nozaki, Aichi-gun, JP;
Atsushi Tabata, Okazaki, JP;
Atsushi Honda, Seto, JP;
Akiharu Abe, Toyota, JP;
Yuji Inoue, Nisshin, JP;
Hirofumi Ota, Toyota, JP;
Atsushi Kamada, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
Engagement, disengagement, and slip of a lock-up clutch can be controlled using two valves that are a lock-up relay valve and a linear solenoid valve. A lock-up control valve employed in a conventional hydraulic control apparatus can be eliminated, which simplifies the configuration, and reduces the size of a hydraulic control apparatus for a torque converter with a lock-up clutch. When the lock-up clutch is engaged, hydraulic pressure output from the linear solenoid valve is supplied to a disengagement-side oil chamber of the torque converter, and a pressure difference between the engagement-side oil chamber and the disengagement-side oil chamber is applied to a spool valve element of the linear solenoid valve. Therefore, the spool valve element is driven such that an electromagnetic force applied from a linear solenoid becomes equal to the pressure difference.