Patent ID: 8103421

Claim:
A parking brake control device for executing a parking brake control by using a brake system including an electric parking brake and a service brake, the electric parking brake generating a pressing force for moving a first friction material toward a second friction material by rotating an electric motor in a first direction, the electric parking brake accordingly generating a brake force by using friction between the first friction material and the second friction material, the service brake operating based on operation to a brake pedal and generating a brake force by moving the first friction material to the second friction material, the parking brake control device comprising: a lock control means for executing a lock control in which the lock control means causes the electric parking brake to generate a brake force by rotating the electric motor to rotate in the first direction so as to move the first friction material toward the second friction material and then stops rotation of the electric motor to maintain the brake force; and a release control means for executing a release control in which the release control means causes the electric parking brake to decrease the brake force by rotating the electric motor in the second direction so as to decrease the pressing force and to move the first friction material apart from the second friction material and then stops rotation of the electric motor after the pressing force decreases to a target value, wherein the target value is a value at which the brake force generated by the electric parking brake is supposed to be removed, wherein the release control means includes: an operation determination means for determining whether or not the service brake is operating; and a first delay means for setting a stop timing of stopping the rotation of the electric motor to a timing which is later by a first predetermined time than a target timing at which the pressing force becomes the target value, if the operation determination means determines that the service brake is operating after the pressing force becomes the target value.