Title:
ELECTRIC FRICTION ENGAGEMENT DEVICE, AND TOUCH POINT DETECTION METHOD AND ANOMALY DETECTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/014343
Kind Code:
A1
Abstract:
The present invention addresses the problem of implementing a structure capable of detecting a piston touch point and a clutch touch point. To solve the problem, when an electric friction engagement device (7) is switched from a connection mode to a disconnection mode, a phase (θ) related to the direction of rotation of a drive cam (34) at the time when the output torque (T) or current value (A) of a shift motor (66) starts increasing at an increase rate that is at least a first threshold is detected as a piston touch point (θp), and a phase (θ) related to the direction of rotation of the drive cam (34) at the time when the increase rate becomes equal to or lower than a second threshold is detected as a clutch touch point (θf).
Inventors:
YAMAMOTO AKIHIRO (JP)
KIMURA SHINGO (JP)
KIMURA SHINGO (JP)
Application Number:
PCT/JP2023/024660
Publication Date:
January 18, 2024
Filing Date:
July 03, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16D25/12; F16D13/52; F16D48/06
Domestic Patent References:
| WO2011096540A1 | 2011-08-11 | |||
| WO2022209634A1 | 2022-10-06 |
Foreign References:
| JP2018189207A | 2018-11-29 |
Attorney, Agent or Firm:
KIWA INTERNATIONAL (JP)
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