| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the regeneration efficiency and the energy efficiency while preventing the defective action of a fluid pressure actuator by the simple constitution regarding the fluid pressure circuit of a working machine. <P>SOLUTION: It has a fluid pressure source of supply 4, a fluid pressure actuator 5, an operation means 7 to set up the stroke volume, a control valve 2 to adjust the supply fluid of the working fluid to the fluid pressure actuator 5, a regeneration circuit 17 to regenerate the working fluid discharged from the fluid pressure actuator 5, a regeneration valve 8 to adjust the regeneration fluid, a pilot circuit 19 to control the open degree of the control valve 2, the second pilot circuit 20 that branches from a pilot circuit 19 and adjusts the open degree of the regeneration valve 8, a control means 11 to output a control signal according to the supply quantity of the working fluid from the supply source of the fluid pressure 4 and an electromagnetic proportional pilot pressure control valve 10 to adjust the pilot pressure arranged on the second pilot circuit 20 on the open degree control of regeneration valve 8 on the basis of the control signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
