| 摘要 |
<p>PURPOSE:To promote energy-saving and to improve work efficiency by minimizing the discharge quantity of a variable capacity hydraulic pump when both levers of remote-controlled valves are not operated, and increasing the discharge quantity to the maximum when one lever is operated. CONSTITUTION:A pilot switch valve 16 which is switched by pilot pressure from respective remote-controlled valves 10, 11 and adapted to selectively connect a flow control portion 1a to a pilot pump 13 and a tank 9 is connected to the flow control portion 1a of a variable-capacity hydraulic pump 1. In this arrangement, the discharge quantity of the variable-capacity pump 1 is minimized when both levers 10c, 11c of the remote-controlled valves 10, 11 are not operated, and increased to the maximum when one of the levers is operated, so that power saving can be promoted, and the respective actuators can be controlled individually to improve work efficiency.</p> |
