Patent ID: 7669413

Claim:
A hybrid construction machine comprising: an engine; a hydraulic pump connected to an output shaft of the engine; a hydraulic actuator driven by the hydraulic pump; a generator motor connected to the output shaft of the engine to perform a generator function and a motor function; an electric actuator; operating means for operating the hydraulic actuator and the electric actuator; an electric storage device which supplies and receives electric power to and from the generator motor and the electric actuator; and control means for controlling outputs of the hydraulic pump and the electric actuator, wherein the control means detects power consumption of each of the hydraulic pump and the electric actuator, and controls the outputs of the hydraulic pump and the electric actuator so that the sum of the detected power consumption does not exceed a maximum supply power set as the sum of power that can be supplied to the hydraulic pump and the electric actuator, wherein the control means determines the maximum power supply by detecting a charging state of the electric storage device and an engine revolution speed, and setting the maximum supply power on the basis of actual maximum system power that can be obtained from the actual charging state of the electric storage device and the actual engine revolution speed.