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1. (WO2018143249) DEVICE AND METHOD FOR CONTROLLING LOCK-UP CLUTCH

Pub. No.:    WO/2018/143249    International Application No.:    PCT/JP2018/003149
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Thu Feb 01 00:59:59 CET 2018
IPC: F16H 61/14
Applicants: JATCO LTD
ジヤトコ株式会社
Inventors: IIZUMI, Takehiro
飯泉 岳大
NODA, Toshiaki
野田 俊明
YAMADA, Takahiro
山田 隆宏
KOGUCHI, Takashi
古口 幸司
ISHIYAMA, Yuichi
石山 雄一
Title: DEVICE AND METHOD FOR CONTROLLING LOCK-UP CLUTCH
Abstract:
A torque converter (21) provided between an engine (1) and an automatic transmission (2) is provided with a lock-up clutch (21). A device (11) for controlling the lock-up clutch (21) performs control such that the lock-up clutch (21) reaches a first slip amount in a low-vehicle-speed region. If the slip amount remains in a state of being equal to or greater than a second slip amount that is greater than the first slip amount, it is determined that there is an abnormality and the lock-up clutch (21) is released. When there is a request to change the automatic transmission (2) to a lower speed during coasting, the abnormality determination is prohibited in order to avoid an erroneous determination accompanying the change in speed.