US 12,227,158 B2
Electronic parking brake system and control method therefor
Wookhyeon Kim, Suwon-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Appl. No. 17/772,983
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Oct. 14, 2020, PCT No. PCT/KR2020/014036
§ 371(c)(1), (2) Date Apr. 28, 2022,
PCT Pub. No. WO2021/085897, PCT Pub. Date May 6, 2021.
Claims priority of application No. 10-2019-0137844 (KR), filed on Oct. 31, 2019.
Prior Publication US 2024/0149844 A1, May 9, 2024
Int. Cl. B60T 13/74 (2006.01); B60T 8/171 (2006.01); B60T 8/172 (2006.01); B60T 17/22 (2006.01); F16D 65/18 (2006.01); F16D 121/24 (2012.01); H02P 23/14 (2006.01); B60T 8/17 (2006.01); B60T 8/18 (2006.01); B60T 8/24 (2006.01)
CPC B60T 8/172 (2013.01) [B60T 8/171 (2013.01); B60T 13/746 (2013.01); B60T 17/22 (2013.01); F16D 65/18 (2013.01); H02P 23/14 (2013.01); F16D 2121/24 (2013.01); H02P 2205/03 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electric parking brake (EPB) system comprising a motor actuator operated by an electric motor, comprising:
a motor driving circuit configured to drive the electric motor;
a current sensor detecting a current flowing through the electric motor;
a voltage sensor detecting a voltage input to the electric motor;
a timer configured to count a period of use of the EPB system; and
a controller configured to:
determine a total energy consumption based on the current and voltage of the electric motor during a parking operation,
determine whether a target current of a parking operation mode needs to be changed in response to the determined total energy consumption,
determine the period of use from a product launch of the EPB system to the present from the period of use counted through the timer that counts individual or overall operating times of control modes comprising the parking operation mode and a parking operation release mode,
in response to determining that the target current needs to be changed, change the target current based on the period of use and the number of times of operation of the EPB system, and
control the electric motor in response to the changed target current.