| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly energy-efficient hybrid construction machine with better operability of a slewing structure, the machine improved from an energy-saving construction machine that uses both a slewing oil-pressure motor and a slewing motor.SOLUTION: Based on an operation amount of a slewing operation lever, a ratio of the torque of a slewing motor to that of a slewing oil-pressure motor is changed. Further, based on the operation amount of the slewing operation lever, the pressure of the slewing oil-pressure motor and the rotation speed of the slewing motor, the torque of the motor and relief pressure are controlled. |
