公开(公告)号：US20240166178A1

公开(公告)日：2024-05-23

申请号：US18283078

申请日：2022-03-09

Applicant: Hitachi Astemo, Ltd.

Inventor： Masayuki KIKAWA ,  Norikazu MATSUZAKI ,  Naoshi YAMAGUCHI

IPC: B60T8/172 ,  B60T1/06 ,  B60T8/171 ,  B60T13/74 ,  F16D55/226 ,  F16D65/18 ,  F16D121/04 ,  F16D121/24 ,  F16D125/06

CPC classification number: B60T8/172 ,  B60T1/065 ,  B60T8/171 ,  B60T13/746 ,  F16D55/226 ,  F16D65/18 ,  B60T2220/04 ,  F16D2121/04 ,  F16D2121/24 ,  F16D2125/06

Abstract: A parking brake control apparatus acquires a first physical amount indicating a change in a current applied to an electric motor (for example, a gradient of a change in a current) at the time of an application operation. The parking brake control apparatus sets a second physical amount indicating completion of the application operation so as to make it smaller when the first physical amount (for example, the gradient of the change in the current) exceeds a predetermined threshold value, compared to when the first physical amount is equal to or smaller than the threshold value. The parking brake control apparatus determines the completion of the application operation when a physical amount indicating the application operation (for example, a current value) reaches the second physical amount.