CONTROL SYSTEM FOR CONTROLLING INPUT POWER TO VARIABLE DISPLACEMENT HYDRAULIC PUMPS OF A HYDRAULIC SYSTEM

摘要

The control system is for input power to hydraulic pumps of a hydraulic system including a prime mover and variable displacement hydraulic pumps driven by the prime mover. The control system comprises a first computing unit for each of the hydraulic pumps, an input torque control value concerning a distribution of input torques of the hydraulic pumps from a representative pressure obtained on the basis of a discharge pressure of at least one other hydraulic pump. A second computing unit determines an input torque for each of the hydraulic pumps on the basis of a corresponding one of the input torque control values.