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. 06, 2019
Filed:
Aug. 12, 2016
Jatco Ltd, Fuji-shi, Shizuoka, JP;
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Toshimitsu Araki, Ebina, JP;
Seiji Kasahara, Atsugi, JP;
Hideshi Wakayama, Hadano, JP;
Kouji Saitou, Machida, JP;
Hiroyasu Tanaka, Atsugi, JP;
JATCO LTD, Fuji-Shi, JP;
NISSAN MOTOR CO., LTD., Yokohama-Shi, JP;
Abstract
In a vehicle on which a torque converter having a lock-up clutch is mounted between an engine and a transmission, a meet point learning controller is provided to perform learning control for obtaining a learning value based on information on a meet point at which the lock-up clutch starts torque transmission. The meet point learning controller estimates a LU transmission torque based on a difference between an engine torque signal value and a torque converter transmission torque when the lock-up clutch moves from a non-engaged state to an engaged state during traveling of the vehicle, and uses, as the meet point information, a meet point detection pressure at a time when the LU transmission torque estimated value is determined to have entered an upward trend.