| 摘要 |
PURPOSE:To increase the response when a pedal is returned and simplify the construction by providing passages in a stepped piston, which are closed in a state of being brought in contact with the end surface of a liquid chamber on the actuating cylinder side by means of the pressing force of a spring. CONSTITUTION:In a cylinder 21 is housed a stepped piston 22, having a stepped construction with a small diametral shaft part 22a being extended in an integrated form in a liquid chamber B on the actuating-cylinder 3 side, while a vibration isolating spring 24 is installed in a liquid chamber A on the master- cylinder 2 side. The first passage 25 is provided in the center of the stepped piston 22 in the axial direction, and plural number of the second passages 26 are axially formed on the outer side in the large diameter part, and valve seats 27 are fitted in these passages 26. A narrow orifice 28 is provided for permanently connecting the liquid chambers A, B through the first passage 25. Very slight movement of the stepped piston 22 against the spring 24 on returning a clutch pedal 1, opens a flow route to the master cylinder 2, flowing liquid, thereby providing good response and simplifying the construction. |
