| 摘要 |
Construction machinery that can achieve a great fuel reduction effect through an efficient use of recovered energy is provided. The Construction machinery includes at least two actuators 7 and 8, a main pump 3 that generates hydraulic energy for driving the actuators 7 and 8, flow control means 4 disposed between the main pump 3 and the actuators 7 and 8, an additional energy generating means 11 that generates energy to be added to the hydraulic energy, and a control means 20 that reduces hydraulic energy generated by the main pump 3 when the additional energy generating means 11 generates energy. The construction machinery further comprises changeover means 12d, 12e, and 12f that selectively change a location at which the energy from the additional energy generating means 11 is to be added according to the actuators 7 and 8. The control means 20 changes a reduction rate of the hydraulic energy generated by the main pump 3 depending on a specific actuator 7 or 8 to which the energy is to be added. |
