| 摘要 |
The present invention provides a construction machine capable of restricting the generation of a hunting in controlling the operation of an engine. The construction machine comprises: a load estimating part (45); a restoration retrogression request calculation part (46); an engine request calculation part (47); and an electric generator control part (48). The load estimating part (45) estimates a pump absorption power (P). The restoration retrogression request calculation part (46) calculates a restoration retrogression request power (Q) depending on the charged state of a battery (34). The engine request calculation part (47) calculates the engine request power (L) based on the pump absorption power (P) and the restoration retrogression request power (Q). The electric generator control part (48) performs a revolutions per minute control or a torque control. The electric generator control part (48) includes a control conversion part (48A) performs a conversion between the revolutions per minute control and the torque control depending on the engine request power (L) and the revolutions per minute of the engine (15). The control conversion part (48A) converts from the torque control to the revolutions per minute control when the engine request power (L) is increased such that the revolutions per minute of the engine (15) are less than the revolutions per minute N min, while the torque control is performed. |
