| 摘要 |
<P>PROBLEM TO BE SOLVED: To arrange only one hydraulic regeneration motor to a plurality of hydraulic actuators which can regenerate power, and secure excellent regeneration efficiency. <P>SOLUTION: Power regeneration oil passages 22a or the like included in respective basic circuits are merged and are connected to the one hydraulic regeneration motor 23. A flow rate of a flow flowing in the power regeneration oil passage 22a or the like is obtained based on a differential pressure between a pressure detected by a third pressure gauge 32a or the like and a pressure detected by a second pressure gauge 31a or the like and previously set differential pressure and flow rate characteristics. Hydraulic power of the power regeneration oil passage 22a or the like is obtained from a product of the obtained flow rate and the pressure detected by the second pressure gauge 31a or the like. The hydraulic actuator which carries out regeneration is determined based on the obtained respective hydraulic power. A controller 10 for controlling a regeneration limiting valve 24a or the like is arranged so as to guide operating oil flowing in an operating oil discharge oil passage 20a or the like of the determined hydraulic actuator to the hydraulic regeneration motor 23. <P>COPYRIGHT: (C)2013,JPO&INPIT |
