Invention Publication
- Patent Title: ELECTRIC PARKING BRAKE DEVICE
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Application No.: US17910635Application Date: 2020-12-18
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Publication No.: US20230166703A1Publication Date: 2023-06-01
- Inventor: Sandip PURANE , Yasuhiro YAMAMOTO , Mari TAKAHASHI
- Applicant: Hitachi Astemo, Ltd. , Hitachi Astemo Ueda, Ltd.
- Applicant Address: JP Ibaraki
- Assignee: Hitachi Astemo, Ltd.,Hitachi Astemo Ueda, Ltd.
- Current Assignee: Hitachi Astemo, Ltd.,Hitachi Astemo Ueda, Ltd.
- Current Assignee Address: JP Ibaraki
- Priority: JP 20043290 2020.03.12
- International Application: PCT/JP2020/047372 2020.12.18
- Date entered country: 2022-09-09
- Main IPC: B60T8/88
- IPC: B60T8/88 ; B60T1/06 ; F16D65/52 ; F16D65/22 ; B60T13/74 ; F16D51/22 ; B60T17/22 ; F16D66/00

Abstract:
Provided is an electric parking brake device in which a drum brake includes braking gap automatic adjustment means and a parking brake lever, and the operation of an electric actuator that drives the parking brake lever is controlled by a control unit. When an application operation time of the electric actuator (38) by the time when a parking brake state is obtained has exceeded a predetermined application operation end determination time (T2), the control unit (C) determines that the braking gap automatic adjustment means (18) is abnormal. With this configuration, at the time of obtaining the parking brake state, the presence or absence of abnormality in the braking gap automatic adjustment means can be determined.
Information query
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