| 摘要 |
<p>PURPOSE:To intend to diversify control by making a first pilot pressure control mechanism and a second pilot pressure control mechanism into separated channels, while respective mechanisms control a meter-in spool and meter-out valves respectively. CONSTITUTION:High speed change over valves HV1, HV2 to be a pilot pressure control mechanism controlling a meter-in spool S and high speed change over valves HV3, HV4 to be a second pilot pressure control mechanism controlling meter-out valves V1, V2 are separated into different channels. It can be done thereby to control meter-in character and meter-out character separately, there fore diverse control can be performed on various combinations of character in meter-in with character in meter-out.</p> |
