ELECTRONIC PARKING BRAKE SYSTEM AND CONTROL METHOD THEREOF
Disclosed are an electronic parking brake system and a control method thereof. An aspect is to protect an electronic parking brake system by judging whether it enters a control mode based on results of monitoring a peripheral temperature of the electronic parking brake system and a motor temperature after operation. The electronic parking brake system includes a locking/unlocking switch to lock or unlock an electronic parking brake, a motor to drive the electronic parking brake, a temperature sensor to measure a peripheral temperature around the motor, and a controller that limits a locking function of the electronic parking brake when the repetition number of locking/unlocking operations of the electronic parking brake is zero for a predetermined short time under assumption that the temperature sensor breaks down, so as to prevent occurrence of breakdown due to overload and overheating of the motor.
1 . An electronic parking brake system comprising:
a locking/unlocking switch to lock or unlock an electronic parking brake;
a motor to drive the electronic parking brake;
a temperature sensor to measure a peripheral temperature around the motor; and
a controller that limits a locking function of the electronic parking brake when the repetition number of locking/unlocking operations of the electronic parking brake is zero for a predetermined short time under assumption that the temperature sensor breaks down, so as to prevent occurrence of breakdown due to overload and overheating of the motor.
2 . The system according to claim 1 , wherein the controller reduces a count value when the temperature sensor is not normally operated and the locking/unlocking switch is turned on.
3 . The system according to claim 2 , wherein the controller increases the count value when the temperature sensor is not normally operated and the locking/unlocking switch does not generate a locking/unlocking input.
4 . The system according to claim 1 , wherein the controller limits the locking function of the electronic parking brake system when the temperature sensor is not normally operated and a temperature measured by the temperature sensor is deviated from a preset normal temperature range, so as to prevent occurrence of breakdown due to overload and overheating of the motor.
5 . A control method of an electronic parking brake system comprising a locking/unlocking switch to lock or unlock an electronic parking brake, a motor to drive the electronic parking brake, and a temperature sensor to measure a peripheral temperature around the motor, the control method comprising:
counting the repetition number of locking/unlocking operations of the electronic parking brake for a preset short time when the temperature sensor breaks down; and
limiting a locking function of the electronic parking brake when the repetition number is zero, so as to prevent occurrence of breakdown due to overload and overheating of the motor.
6 . The method according to claim 5 , further comprising reducing a count value when the temperature sensor is not normally operated and the locking/unlocking switch is turned on.
7 . The method according to claim 6 , further comprising increasing the count value when the temperature sensor is not normally operated and the locking/unlocking switch does not generate a locking/unlocking input.
8 . The method according to claim 5 , further comprising limiting the locking function of the electronic parking brake system when the temperature sensor is not normally operated and a temperature measured by the temperature sensor is deviated from a preset normal temperature range, so as to prevent occurrence of breakdown due to overload and overheating of the motor.