Stroke simulator, master cylinder having stroke simulator and brake system using master cylinder

摘要

First and second reaction force simulator pistons 18, 20 move downward due to a hydraulic pressure that is generated inside a simulator hydraulic fluid chamber 15 by a simulator operation piston being operated by an input of an input shaft 4. At this time, due to urging forces of first and second reaction force simulator springs 19, 21, the hydraulic pressure inside the hydraulic fluid chamber 15 is a hydraulic pressure based on the input, and this hydraulic pressure is transmitted to the input shaft 4 via the simulator operation piston 14, as a reaction force. Due to the downward movement of the second reaction force simulator piston 20, a sliding resistance applying member deformation operation portion 20a of the second reaction force simulator piston presses and deforms a reaction force simulator piston sliding resistance applying member 29. Thus, sliding resistance that changes in accordance with operation of the second reaction force simulator piston 20 is applied to the second reaction force simulator piston 20.