Triple controls of variable displacement pumps

The paper reports upon numerical simulation tests carried out on a variable displacement axial piston pump equipped with multiple automatic controls. The swashplate control circuit includes three 3-way valves: the pressure compensator, the flow compensator and the torque limiter. The dynamic response of the system is evaluated for both separate and combined control functions. The effect of changes in the design parameters is discussed in terms of both sensitivity analysis and conventional discrete search.