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:
Oct. 16, 2007
Filed:
Oct. 03, 2005
Hiroshi Sekiya, Fuji, JP;
Tatsuya Imamura, Fuji, JP;
Koji Dohi, Fuji, JP;
Kouji Saitou, Fuji, JP;
Jatco Ltd, Shizuoka, JP;
Abstract
A lock-up clutch control device, which controls a lock-up clutch () installed in a torque converter () interposed between an engine () and a transmission () used with a vehicle, is disclosed. The lock-up clutch control device has a differential pressure generating device () which engages or disengages the lock-up clutch by adjusting a differential pressure supplied to the lock-up clutch, a sensor () which detects a vehicle speed, and a controller. The controller is programmed to: determine whether or not the vehicle speed is equal to or larger than a first threshold value (V) corresponding to a lock-up ON vehicle speed; command the differential pressure generating device to engage the lock-up clutch, when the vehicle speed is equal to or larger than the first threshold value (V); determine whether or not the vehicle speed has reached a second threshold value (V) larger than the first threshold value (V); set a lock-up OFF threshold value (V/V) which depends on whether the vehicle speed has reached the second threshold value (V); and command the differential pressure generating device to disengage the lock-up clutch, when the vehicle speed is equal to or less than the lock-up OFF threshold value.