| 摘要 |
PROBLEM TO BE SOLVED: To make a valve side member corresponding to the relative advancing as the part compressed by a disk spring form elastic member, increase the servo ratio smoothly and continuously, prevent to give a physical disorder feeling of the brake feeling owing to a sudden variation of the servo ratio, and facilitate the assembly. SOLUTION: A valve plunger 18 to compose the reaction mechanism of a brake booster is composed of a plunger member 35 at the front side, and a valve side member 36 at the rear side, and a disk spring form elastic member 41 is provided between the plunger member 35 and the valve side member 36. In this disk spring form elastic member 41, its compression is continued from the time the compression is started after the brake booster is operated, to the time the brake booster device is made in the full loading condition. |
