| 摘要 |
PURPOSE:To increase the reactive force to operation to a proper level by forming a throttle, having orifice action, in the passage for working liquid leading from the inlet port of liquid pressure booster to the boosting chamber. CONSTITUTION:Stepping on the brake pedal 45 will push the spool 15 to the left, being pushed by an input rod 37, through No.1 rod 33 of the operating rod 4. This will approach a land 15d to the shoulder 2c, and the opening area of a throttle valve 20 composed of these will decrease to restrict the flow of working liquid from the groove 2a to groove 15a. The simultaneous movement of the spool 15 to the left will shut a return valve 22 and open a control valve 21, and further the opening area of the throttle valve 20 will decrease to permit the liquid pressure generated at the upper flow, i.e. in the groove 2a, to reach the boosting chamber 17 through the control valve 21, groove 15b, radial hole 15g, hollow 15f and radial direction 15h. |
