Working Principle and Compensation Control of Komatsu Hydraulic Closed Center Load

Functions of Komatsu Hydraulics 

Komatsu hydraulics working principle is to control  the variable of the main pump to optimally match the absorbed power of the hydraulic system with the output power of the engine to save energy; Function 2: Komatsu hydraulic will not be affected by the load, realizing precise control for smoother digging; Function 3: Komatsu hydraulics has the performance of determining the flow distribution in compound operation only according to the opening area of the slide valve.

CLSS Working Principle (⒈ swashplate tilt angle control)

Komatsu hydraulic closed working principle-LS valve differential pressure △ PLS = PP - PLS; Komatsu hydraulic closed working principle when △ PLS is greater than the set pressure of LS valve, the servo piston moves to the small end, the main pump displacement decreases; Komatsu hydraulic closed working principle when △ PLS is less than the set pressure of LS valve, the servo piston moves to the large end, the main pump displacement increases.

CLSS working principle (2 peal pressure compensation control)

The pressure compensation valve is installed on the outlet side of the main control valve, Komatsu Hydraulic Closed Compensation Control is used to balance the load. When the two actuators work together, the pressure difference between the inlet and outlet pressure of each slide valve is made equal by the pressure compensation valve, Komatsu Hydraulic Closed Compensation Control ensures that the flow of the pump is distributed proportionally according to the opening area of each valve without the influence of different loads.

• The  main pump consists of two variable swashplate piston pumps, two PC valves, two LS valves, one LS-EPC valve and one PC-EPC valve.

  
  

• The main pump converts the mechanical energy generated by the engine into hydraulic energy and then adjusts the hydraulic oil output according to the load.

  
  

• The main pump displacement reaches the minimum volume when the load reaches overflow pressure.