CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE

摘要

A control system for a hybrid construction machine is provided with: an operation valve for boom operation; a variable capacity fluid pressure motor; a distribution mechanism for adjusting the flow rate ratio distributed to the fluid pressure motor; a motor generator that integrally rotates with the fluid pressure motor; a variable capacity assist pump that integrally rotates with the motor generator; a distribution mechanism control unit for controlling the distribution mechanism; a tilt angle control unit for controlling the tilt angle of the fluid pressure motor and the assist pump; and a motor generator control unit for keeping the speed of a motor generator at a target speed. The target speed during boom regenerative control is set to be higher than the target speed when only assist control is carried out.