| 摘要 |
<p>A likelihood of over-adjustment occurring in a drum brake device to be operated by an electric actuator is reduced. When a parking brake signal is switched off (S21: Yes), a parking brake ECU determines whether or not a vehicle stop duration (Ts) indicating how long a vehicle has been stationary is equal to or more than a set duration (T0) (S22). When the vehicle stop duration (Ts) is equal to or more than the set duration (T0), the parking brake ECU estimates that a brake drum is not thermally expanded. In this case, the parking brake ECU drives a motor in reverse, and then stops the motor when a rotation amount (R) of the motor has reached a set rotation amount (R1) from a time point at which a motor current (im) becomes constant (point at which the brake shoes separate from the brake drum) (S23 to S29).</p> |
