| 摘要 |
PROBLEM TO BE SOLVED: To suppress colliding of a pressing member energized to a moving member side according to decreasing of W/C (Wheel Cylinder) pressure with the moving member with a great impact.SOLUTION: When an EPB (Electronic Parking Brake) 2 performs a locking operation when a parking brake is operated, a pressure-decreasing limit control is executed until a driving shaft 22 contacts a piston 23. Accordingly, even when the time of decreasing the W/C pressure by a service brake 1 is equal to the time of bringing the driving shaft 22 having moved by the motor driving of the EPB 2 into contact with the piston 23, it is possible to prevent the piston 23 energized to the driving shaft 22 side with decreasing of the W/C pressure from colliding with the driving shaft 22 with the great impact, and a large load can be prevented from being applied to the driving shaft 22. |
