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:
Aug. 18, 2020
Filed:
Jan. 31, 2017
Jatco Ltd, Fuji-shi, Shizuoka, JP;
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Takahiro Yamada, Ebina, JP;
Kunihiro Takahashi, Atsugi, JP;
Syunsuke Iwamoto, Isehara, JP;
Yuji Okamoto, Atsugi, JP;
Toshiaki Noda, Atsugi, JP;
JATCO LTD, Fuji-Shi, JP;
NISSAN MOTOR CO., LTD., Yokohama-Shi, JP;
Abstract
A lockup control device for a vehicle includes: a torque converter, and a lockup control configured to increase a lockup pressure difference command to an initial pressure difference, when a turbine rotation speed variation amount of the torque converter becomes smaller than a predetermined value during a ramp control in which the lockup pressure difference command is increased by a ramp pressure difference, the lockup control section being configured to switch to a second increase gradient having an increase gradient lower than a first increase gradient of the ramp pressure difference when the turbine rotation speed variation amount is equal to or greater than the predetermined value.