| 摘要 |
PURPOSE:To improve brake operation feeling after the start of power pressure introduction to the power pressure chamber of a fluid pressure booster in a fluid pressure booster. CONSTITUTION:A movable member 100 energized with a spring 108 is laid between a reaction piston 86 and a power piston 66. Furthermore, the movable member 100 is coupled to the reaction piston 86 after the start of power pressure introduction to the power pressure chamber of a fluid pressure booster, thereby causing an increase in reaction acting on the reaction piston 86. According to construction, the easy extension of stepping stroke for a brake pedal can be prevented, after the start of power pressure introduction to the power pressure chamber 72 of a fluid pressure booster 10. |
