| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric booster device capable of suppressing invalid tread force during loss stroke in brake pedal operation.SOLUTION: An electric booster device 16 actuates an actuator 20 according to movement of an input rod 18 by a brake pedal 5. Thereby the electric booster device 16 generates thrust on a booster piston 19, and generates brake liquid pressure P in a master cylinder 8. In a stroke area of the input rod 18 since start of operation of the brake pedal 5 until generation of the brake liquid pressure P in the master cylinder 8, the booster piston 19 is moved by the actuator 20 so that force for cancelling force by a pedal return spring 5A for energizing the brake pedal 5 to an initial position is generated on neutral springs 26A, 26B. |
