| 摘要 |
PROBLEM TO BE SOLVED: To provide a control system of a hybrid construction machine capable of performing efficient regeneration with simple regenerative control.SOLUTION: The control system includes a pressure detector 49 for detecting swing pressure or braking pressure of a swing motor 76, a swing regeneration switching valve 48 which opens when the pressure detected by the pressure detector 49 reaches a swing regeneration starting pressure, conducting a working fluid from a swing circuit 75 to a regenerative motor 88 to perform swing regeneration, an operating state detector 97 for detecting the operating state of a fluid pressure cylinder 77, and a cylinder regeneration switching valve 53 which opens on the basis of the detection results of the operating state detector 97 and conducting the working fluid from the fluid pressure cylinder 77 to the regenerative motor 88 to perform cylinder regeneration. When performing only swing regeneration, the working fluid from the swing circuit 75 is conducted to the regenerative motor 88 without reduced in pressure. When swing regeneration and cylinder regeneration are simultaneously performed, the working fluid from the swing circuit 75 is merged with the working fluid from the fluid pressure cylinder 77, while reduced in pressure, and conducted to the regenerative motor 88. |
