Patent ID: 8622179
Filing Date: 2014-01-07
Classification: B60T,F16D

Abstract:
1. A parking brake control device that includes a locking control means that, by operating a motor such that it rotates in a forward direction, moves a friction-applying member in a direction toward a friction-applied member that is attached to a wheel, causing a braking force to be generated by a parking brake, and thereafter stops the operating of the motor and maintains the braking force, and a releasing control means that, by operating the motor such that it rotates in a reverse direction, moves the friction-applying member in a direction that separates it from the friction-applied member, decreasing the braking force of the parking brake, and thereafter stops the operating of the motor and releases the braking force, the parking brake control device comprising: a determination means that, when the releasing control means acquires a motor electric current that flows when the motor is being operated, determines whether an absolute value of a differential value of the acquired motor electric current has exceeded a threshold value; an operation time setting means that, if it is determined by the determination means that the absolute value of the differential value of the acquired motor electric current has not exceeded the threshold value, sets a releasing operation time, based on the motor electric current at the time that the determination is made, that is a time from when the determination is made until the operating of the motor is stopped; and an operation stopping means that measures the releasing operation time that has been set by the operation time setting means, and stops the operating of the motor when the releasing operation time has elapsed after it is determined by the determination means that the absolute value of the differential value of the acquired motor electric current does not exceed the threshold value.