Patent ID: 8655558

Claim:
A control system for hybrid construction machine, comprising: a variable-capacity main pump; a circuit system which is connected to the main pump and includes a plurality of control valves; a regulator which controls a tilting angle of the main pump; a pilot flow path which is provided in the circuit system and introduces a pilot pressure generated when any one of the plurality of control valves is switched to the regulator; an electric motor; a variable-capacity sub-pump which is connected to a discharge side of the main pump and driven by an output power of the electric motor; a regulator which is provided in the sub-pump and controls a tilting angle of the sub-pump; a pressure sensor which is provided in the pilot flow path and detects the pilot pressure; and a controller which is connected to the pressure sensor, controls the regulator of the sub-pump in accordance with a pressure signal from the pressure sensor, detects an output of the main pump and controls the output power of the electric motor according to the output of the main pump based on a table stored beforehand.