| 摘要 |
A hybrid-type construction machine is provided which permits swing operation without a sense of awkwardness compared with conventional construction machines and which allows the amount of stored electricity in an electrical storage device to be controlled within an appropriate range of use in consideration of the service life of the electrical storage device without enlarging its capacity. The hybrid-type construction machine includes an electric motor and a hydraulic motor for driving a swing structure, an electrical storage device, and a controller for controlling charging and discharging of the electrical storage device. The controller includes a storage unit which stores a discharge command region to be set in accordance with the swing speed of the swing structure with regard to the amount of stored electricity in the electrical storage device, and a computing unit which, if the amount of stored electricity in the electrical storage device reaches the discharge command region stored in the storage unit, computes an additional drive torque command value for increasing the amount of powering of the electric motor in accordance with the amount of stored electricity in the electrical storage device, the computing unit further outputting the additional drive torque command value to the electric motor to drive the swing structure. |
