Electric parking brake control apparatus, electric parking brake system, and method for controlling electric parking brake system

An electric parking brake system, comprising:

• an electric parking brake actuator that pulls cables connected to respective parking brake units of wheels;
• a brake actuator that controls braking pressures applied to the wheels by service brakes;
• and
• an electric parking control device which includes a pressure-increase control unit that controls the brake actuator to increase the braking pressures to a predetermined value, when a tension of the cables falls below a predetermined target tension after the cables are pulled until the target tension is achieved, and a tension-increase control unit that controls the electric parking brake actuator to pull the cables until the tension of the cables exceeds the target tension, after the braking pressures are increased by the pressure-increase control unit.

A method for controlling an electric parking brake system including an electric parking brake actuator that pulls cables connected to respective parking brake units of wheels, and a brake actuator that controls braking pressures applied to the wheels by service brakes,

• the method comprising:
• controlling the brake actuator to increase the braking pressures to a predetermined value, when a tension of the cables falls below a predetermined target tension after the cables are pulled until the target tension is achieved;
• and
• controlling the electric parking brake actuator to pull the cables until the tension of the cables exceeds the target tension, after the braking pressures are increased.