Method of controlling electric parking brake
A method of controlling an electric parking brake of a vehicle includes calculating a desired braking force based on the vehicle condition at an instruction of applying a braking force, and starting a braking motor of the electric parking brake. The method further includes determining whether a braking force is increasing by measuring current applied to the braking motor, calculating a braking correction value based on the measured current when determined that a braking force is not increasing, calculating a load torque based on the braking correction value and the measured current when determined that a braking force is increasing, and stopping the braking motor when the load torque is greater than the desired braking force.
1. A method of controlling an electric parking brake of a vehicle, the method comprising:
calculating a desired braking force based on the vehicle condition at an instruction of applying a braking force;
starting a braking motor of the electric parking brake;
determining whether a braking force is increasing by measuring current applied to the braking motor;
calculating a braking correction value based on the measured current when determined that a braking force is not increasing;
calculating a load torque based on the braking correction value and the measured current when determined that a braking force is increasing; and
stopping the braking motor when the load torque is greater than the desired braking force.
2. The method as defined in claim 1 , further comprising repeating the step of calculating the load torque when the braking motor is operating and the load torque is smaller than the desired braking force.
3. The method as defined in claim 1 , wherein it is determined that that the braking force increases when the current increases.
4. The method of claim 1 , wherein the rotational speed of the braking motor is not measured while the braking motor is operating.
5. An electric parking brake system configured to perform the method of controlling an electric parking brake according to claim 1 .