| 摘要 |
PURPOSE:To provide high responsibility of operation with minimized power consumption by composing the valve operation of solenoidal one which is performed at limited one position and mechanical one which is performed by use of a spring and liquid pressure to change over the fluid course. CONSTITUTION:When a movable iron core 12 is solenoidally moved down in response to the detection of locked wheels at braking a ball 11 is released from being urged to seat at the opening of a control piston 7. Liquid from an output liquid chamber (b) is rushed into a liquid chamber (c) and the lower end of a control piston 7 is thereby subjected to the liquid pressure, on account of which the control piston is hydraulically moved up against the force of a turn spring 8 to bring a valve body part 7a into contact with a valve seat 5a of a fixed sleeve 5. A flow course toward input and output liquid chambers (a) and (b) are cut off. When the liquid pressure flows into a liquid chamber (c) the capacity of a liquid reservoir (d) is increased to recover and drop the liquid pressure in a wheel cylinder. |
