| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic apparatus capable of performing energy regenerative control. <P>SOLUTION: This hydraulic apparatus 20 comprises a first hydraulic pump motor 16 having a specified amount of inertia moment incorporating therein or added from the outside, a second hydraulic pump motor 108 driven by oil power generated by the first hydraulic pump motor, a flywheel 104 connected to the rotating shaft of the second hydraulic pump motor, and an oil passage 120 connected between the outflow port of the second hydraulic pump motor and the inflow port of the first hydraulic pump motor. An unload oil passage with an opening/closing valve 122, a check valve 126, an accumulator 128, an opening/closing valve 130, and an oil passage with a check valve 33 are connected to the oil passage 120 in this order toward the first hydraulic pump motor. By this configuration, energy accumulated in the flywheel can be efficiently utilized by the openable switching control of the opening/closing valve. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
