| 摘要 |
A parking brake control device 20 drives an electric motor 43B to propel a piston 39 due to an apply request signal from a parking brake switch 19. The parking brake control device 20 has a travel state detection unit for calculating a travel state of whether the vehicle is traveling or stopped, on the basis of a vehicle wheel signal from a vehicle wheel speed sensor 18. When the travel state cannot be calculated by the travel state detection unit, the parking brake control device 20 controls the electric motor 43B so that the rate of change over time in the thrust of the piston 39 is less than when the travel state can be calculated. |
