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:
Nov. 22, 2011
Filed:
Jun. 16, 2008
Katsunori Satou, Sagamihara, JP;
Masaya Kubota, Fuji, JP;
Hiroyuki Takenaka, Yamato, JP;
Kan Yagi, Fuji, JP;
Seiji Totsuka, Kakegawa, JP;
Katsunori Satou, Sagamihara, JP;
Masaya Kubota, Fuji, JP;
Hiroyuki Takenaka, Yamato, JP;
Kan Yagi, Fuji, JP;
Seiji Totsuka, Kakegawa, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A lock-up control system including a lock-up differential pressure generator and a controller that is programmed to: when increasing a lock-up differential pressure command value with time to establish the lock-up state of the torque converter, switch a gradient of the lock-up differential pressure command value from a first gradient to a predetermined gradient larger than the first gradient when an actual slip rotation speed is decreased to a predetermined slip rotation speed value or less; and switch the gradient of the lock-up differential pressure command value from the predetermined gradient to a second gradient smaller than the predetermined gradient when the actual slip rotation speed exceeds the predetermined slip rotation speed value again after being decreased to the predetermined slip rotation speed value or less.