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. 14, 2017
Filed:
Sep. 03, 2014
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Yuzuru Tohta, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A lock-up clutch control device is provided for a vehicle, in which, when the accelerator pedal is released in a slip engagement mode, lock-up re-engagement with reduced engagement shock is performed, thereby improving fuel economy. A torque converter having a lock-up clutch is disposed between an engine and a continuously variable transmission. The vehicle is provided with a coast lock-up control unit configured to bring the engine in a fuel cut-off state when the accelerator pedal is released in a slip engagement mode in which a differential rotation is present in the lock-up clutch with the accelerator pedal being depressed. Upon accelerator fool release operation, the coast lock-up control unit performs an engine torque control to synchronize engine rotation speed and turbine rotational speed, re-engages the lock-up clutch in a rotation synchronization state, and, after the re-engagement, and performs fuel cut-off.