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. 30, 2007
Filed:
Mar. 24, 2005
Tatsuya Imamura, Machida, JP;
Hiroshi Sekiya, Atsugi, JP;
Toshiji Iida, Sagamihara, JP;
Koji Dohi, Machida, JP;
Nobuo Kurogo, Isehara, JP;
Tatsuya Imamura, Machida, JP;
Hiroshi Sekiya, Atsugi, JP;
Toshiji Iida, Sagamihara, JP;
Koji Dohi, Machida, JP;
Nobuo Kurogo, Isehara, JP;
JATCO Ltd, Shizuoka, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
A lock-up clutch control device controls a lock-up clutch provided in a torque converter mounted between an engine and a transmission of a vehicle. The lock-up clutch control device switches between a converter state and a lock-up state by controlling a differential pressure supplied to the lock-up clutch. The lock-up clutch control device has a controller and a differential pressure generator for generating the differential pressure in response to a differential pressure command value. The controller calculates a first differential pressure command value which decreases at a predetermined rate, after the vehicle speed becomes a first predetermined speed; sets the differential pressure command value to a second differential pressure command value, before the vehicle speed becomes a second predetermined speed; and sets the differential pressure command value to a value at which the lock-up clutch is immediately released, when the vehicle speed becomes the second predetermined speed.