Brake pedal stroke simulator

• Main Authors: TAKENOUCHI, KAZUYA, UNO, YOKO, NISHIKAWA, YUTAKA, KATO, MASAIE, NISHIMURA, MASATSUGU, TANI, KAZUHIKO
• Format: Patent
• Language: English; French; German
• Published: 01.05.2013
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

Object To provide a stroke simulator in a brake system which can make the operation feel on a brake operation member moderately hard and can also ensure the stroke of the brake operation member. Solving Means Disclosed herein is a stroke simulator (28) in a brake system including a cylinder body (101), a piston (102) movably inserted in the cylinder body (101), and a second elastic member (154) adapted to be pressed by the piston (102), and functioning to give a simulative operation feel to a brake lever by operating the brake lever to generate a fluid pressure in a front wheel master cylinder and transmit this fluid pressure to the cylinder body (101), thereby deforming the second elastic member (154) through the piston (102), wherein recesses (154d) are formed on the outer circumferential surface (154g) of the second elastic member (154). With this arrangement, the elastic member (154) is pressed by the piston (102) to increase in diameter in the cylindrical body (101), so that the outer circumferential surface (154g) of the elastic member (154) comes into contact with the inner circumferential surface (101a) of the cylindrical body (101) to thereby gradually increase the spring constant of the elastic member (154).