Patent ID: 11970150
Assignee: HL MANDO CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 6:
7. An electronic parking brake system comprising a motor actuator operated by an electric motor, the electronic parking brake system comprising:
a motor drive circuit configured to drive the electric motor;
a current sensor configured to detect a current flowing through the electric motor;
a communication interface configured to communicate with a system mounted on a vehicle to receive a wheel pressure and a longitudinal acceleration of the vehicle; and
a controller configured to receive the wheel pressure and the longitudinal acceleration of the vehicle until a parking operation is started from a time of service braking during driving from the communication interface, estimate a weight of the vehicle based on the received wheel pressure and longitudinal acceleration of the vehicle, change a target current based on the estimated weight of the vehicle during the parking operation, and drive the electric motor through the motor drive circuit so that a motor current detected by the current sensor reaches the changed target current.