Patent ID: 9291175
Filing Date: 2016-03-22
CPC Classification: B60T,F15B

Claim Text:
1. An electrically actuated booster comprising: a master cylinder that generates a brake fluid pressure; an input member that moves forward and backward in response to an operation of a brake pedal; a booster piston configured to control the brake fluid pressure in the master cylinder by moving in the master cylinder; an electrically-operated actuator that causes the booster piston to move; a target displacement setting unit that sets a target value of a relative displacement between the booster piston and the input member based on an operation amount of the brake pedal, or that sets a target value of an absolute displacement of the booster piston based on the operation amount of the brake pedal; a controller that controls the electrically-operated actuator so that the relative displacement between the booster piston and the input member becomes equal to the target value of the relative displacement set by the target displacement setting unit or the absolute displacement of the booster piston becomes the target value of the absolute displacement.