| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control circuit for energy regeneration intended to save space and reduce cost in an energy recovery system. <P>SOLUTION: The control circuit 40 for energy regeneration includes: an output port 38 for a main control valve 33; and a regeneration control valve block 20 for boom energy regeneration which is disposed between the juxtaposed first cylinder 17c1 and second cylinder 17c2 of a boom. The regeneration control valve block 20 has a plurality of valves built into the interior of a block body 42, including a main spool 43 that consolidates a plurality of control characteristics related to energy regeneration. The regeneration control valve block 20 has a function to capture the potential energy that the boom in a raised state has from the first cylinder 17c1 of the boom and store the energy in an accumulator 41 when the boom is lowered, and to directly discharge the stored pressurized oil in the accumulator 41 when the boom is raised, to the first cylinder 17c1 and the second cylinder 17c2 of the boom. <P>COPYRIGHT: (C)2012,JPO&INPIT |
