Title:
ELECTRIC PARKING BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/181808
Kind Code:
A1
Abstract:
An electric parking brake device in which a drum brake has a braking gap automatic adjustment means and a parking brake lever, and a control unit controls operation of an electric actuator that drives the parking brake lever, wherein when the application operation time of the electric actuator (38) until a parking brake state is achieved has exceeded a predetermined application operation end determination time (T2), the control unit (C) determines that there is an anomaly in the braking gap automatic adjustment means (18). This makes it possible to determine, when achieving the parking brake state, whether or not there is an anomaly in the braking gap automatic adjustment means.
Inventors:
PURANE SANDIP (JP)
YAMAMOTO YASUHIRO (JP)
TAKAHASHI MARI (JP)
YAMAMOTO YASUHIRO (JP)
TAKAHASHI MARI (JP)
Application Number:
PCT/JP2020/047372
Publication Date:
September 16, 2021
Filing Date:
December 18, 2020
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
NISSIN BRAKE SYSTEMS CO LTD (JP)
NISSIN BRAKE SYSTEMS CO LTD (JP)
International Classes:
F16D66/00; B60T8/17; B60T13/74; B60T17/22; F16D65/22; F16D65/54
Foreign References:
| JP2016175587A | 2016-10-06 | |||
| US20050236234A1 | 2005-10-27 | |||
| JP2007203821A | 2007-08-16 | |||
| JP2016043798A | 2016-04-04 | |||
| JP2018184093A | 2018-11-22 |
Other References:
See also references of EP 4119812A4
Attorney, Agent or Firm:
OCHIAI & CO. (JP)
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