Title:
LOCK-UP CLUTCH CONTROL DEVICE FOR VEHICLE, AND LOCK-UP CLUTCH CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/043380
Kind Code:
A1
Abstract:
In a vehicle equipped with a torque converter 4 having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. When the lock-up clutch (3) experiences a transition to an engaged state during travel, a meet-point learning control unit (12c) calculates an LU transmission torque estimate on the basis of the difference between the engine torque (engine torque signal value Te) and the torque converter transmission torque (τ×Ne2). Excess clutch capacity is detected when the LU transmission torque estimate is greater than an excess capacity determination transmission torque threshold within a prescribed amount of time after an initial pressure (P_n) based on the learning value (L_n) is instructed. When excess clutch capacity is detected, a learning value correction that reduces the learning value (L_n) is carried out.
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Inventors:
ARAKI TOSHIMITSU (JP)
WAKAYAMA HIDESHI (JP)
SAITOU KOUJI (JP)
KASAHARA SEIJI (JP)
IZUMI TETSUYA (JP)
WAKAYAMA HIDESHI (JP)
SAITOU KOUJI (JP)
KASAHARA SEIJI (JP)
IZUMI TETSUYA (JP)
Application Number:
PCT/JP2016/075394
Publication Date:
March 16, 2017
Filing Date:
August 31, 2016
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H61/14; F16D48/02; F16H59/14
Foreign References:
| JP2012021549A | 2012-02-02 | |||
| JP2015051726A | 2015-03-19 | |||
| JP2012047301A | 2012-03-08 | |||
| JP2013133878A | 2013-07-08 | |||
| JP2011064291A | 2011-03-31 |
Other References:
See also references of EP 3348878A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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