| 摘要 |
PURPOSE:To inform a kick feeling of the driver, by forming a piston (valve) reducing fluid pressure of a rear wheel to a stepped shape to contract an input oil pressure chamber at operation and removing a pedal kick back at front wheel control while providing the kick back at rear wheel control. CONSTITUTION:A front control valve Vf and a rear control valve Vr are provided between a master cylinder M and each wheel cylinder Ff, Br. Control pressure is received to control pressure oil chambers 22, 53 in each control valve when a wheel is locked, and force acting on valve pistons 6a, 36a is reduced. In this way, the valve piston is moved backward to close valves 14, 45, and output pressure oil chambers 10, 41 are enlarged to reduce force of a wheel brake. Here the piston 36a for a rear wheel is formed to stepped shape, in consequence an input pressure oil chamber 40 is contracted to provide a kick back to the master cylinder. Because the piston for a front wheel is formed in an equal diameter, a kick back is not caused at front wheel control, and the driver can detect these kick back feelings. |
