| 摘要 |
PURPOSE:To increase a supply amount of hydraulic pressure to a brake cylinder via a relatively small brake valve without causing a driver to feel unnatural at the time of brake control. CONSTITUTION:A cylinder 19 is provided with an introduction port 27 continuous to a brake valve, a pressure oil feed port 21 continuous to an accumulator, an oil discharge port 22 and an oil feed/discharge port 23 continuous to a brake cylinder. Continuity state among each port is selected with the displacement of a spool 20. A check valve 35 is fitted inside the spool 20, and positioned between the introduction port 27 and the oil feed/discharge port 23. The check valve 35 is opened after the displacement of the spool 20 due to pressure introduction from the introduction port 27. |
