Dynamic Response of a Digital Displacement Motor Operating with Various Displacement Strategies

Sondre Nordås, Michael M. Beck, Morten K. Ebbesen and Torben O. Andersen
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Sondre Nordås: Department of Engineering and Science, University of Agder, 4879 Grimstad, Norway
Michael M. Beck: Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark
Morten K. Ebbesen: Department of Engineering and Science, University of Agder, 4879 Grimstad, Norway
Torben O. Andersen: Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark

Energies, 2019, vol. 12, issue 9, 1-25

Abstract: Digital displacement technology has the potential of revolutionizing the performance of hydraulic piston pumps and motors. Instead of connecting each cylinder chamber to high and low pressure in conjunction with the shaft position, two electrically-controlled on/off valves are connected to each chamber. This allows for individual cylinder chamber control. Variable displacement can be achieved by using different displacement strategies, like for example the full stroke, partial stroke, or sequential partial stroke displacement strategy. Each displacement strategy has its transient and steady-state characteristics. This paper provides a detailed simulation analysis of the transient and steady-state response of a digital displacement motor running with various displacement strategies. The non-linear digital displacement motor model is verified by experimental work on a radial piston motor.

Keywords: digital displacement motor; displacement strategies; transient response; steady-state response; modeling; experimental validation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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