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14:10 ics Saal 5
Experimental loss analyses of displacement controlled pumps
Jan Lux, RWTH Aachen University, Institute for Fluid Power Drives and Controls (IFAS), Germany
Current efficiency measurements of variable hydraulic axial piston pumps are
performed with the displacement system locked at maximum volume, thus without the
controller. Therefore, the controllers effect on the efficiency is not quantified at state of
the art measurements. Former research on control systems mainly focused on the
dynamic behaviour. This paper aims to quantify the losses in the displacement and
control system and to research the dependencies of those. Therefore, a test rig is built
up at IFAS to measure the control power of displacement controlled pumps.
Furthermore, a simulation tool is developed to increase the understanding of the loss
mechanisms of the investigated control systems. In conclusion, the paper shows the
potential of efficiency improvements for displacement controlled pumps.