Classification and Review of Pump-Controlled Differential Cylinder Drives

Søren Ketelsen, Damiano Padovani, Torben O. Andersen, Morten Kjeld Ebbesen and Lasse Schmidt
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Søren Ketelsen: Fluid Power and Mechatronic Systems, Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Damiano Padovani: Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway
Torben O. Andersen: Fluid Power and Mechatronic Systems, Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
Morten Kjeld Ebbesen: Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway
Lasse Schmidt: Fluid Power and Mechatronic Systems, Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark

Energies, 2019, vol. 12, issue 7, 1-27

Abstract: Pump-controlled hydraulic cylinder drives may offer improved energy efficiency, compactness, and plug-and-play installation compared to conventional valve-controlled hydraulic systems and thus have the potential of replacing conventional hydraulic systems as well as electro-mechanical alternatives. Since the late 1980s, research into how to configure the hydraulic circuit of pump-controlled cylinder drives has been ongoing, especially in terms of compensating the uneven flow requirements required by a differential cylinder. Recently, research has also focused on other aspects such as replacing a vented oil tank with a small-volume pressurized accumulator including the consequences of this in terms of thermal behavior. Numerous references describe the advantages and shortcomings of pump-controlled cylinder drives compared to conventional hydraulic systems or electro-mechanical drives. This paper presents a throughout literature review starting from the earliest concepts based on variable-displacement hydraulic pumps and vented reservoirs to newer concepts based on variable-speed electric drives and sealed reservoirs. By classifying these drives into several proposed classes it is found that the architectures considered in the literature reduce to a few basic layouts. Finally, the paper compares the advantages and shortcomings of each drive class and seek to predict future research tasks related to pump-controlled cylinder drives.

Keywords: pump-controlled cylinder drives; direct-driven hydraulics; throttleless hydraulics; valveless hydraulic drive; linear hydraulic actuation (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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