ENERGY EFFICIENCY OF THREE-CHAMBER CYLINDER WITH DIGITAL VALVE SYSTEM

Authors

  • Mikko Huova Tampere University of Technology, Department of Intelligent Hydraulics and Automation P.O.Box 589, FI-33101 Tampere, Finland
  • Arto Laamanen Tampere University of Technology, Department of Intelligent Hydraulics and Automation P.O.Box 589, FI-33101 Tampere, Finland
  • Matti Linjama Tampere University of Technology, Department of Intelligent Hydraulics and Automation P.O.Box 589, FI-33101 Tampere, Finland

Keywords:

digital cylinder, multi-chamber cylinder, energy efficiency

Abstract

Commonly used hydraulic cylinders have a piston and a piston rod. The piston divides the inside of the cylinder in two chambers and pressures which affect how the piston generates the linear motion. Use of distributed valve system enables several control modes in a system of this type because different control edges can be controlled independently. These control modes can be used for decreasing energy consumption and improving controllability. The traditional hydraulic cylinder has only a limited number of control modes, but by utilizing a multi-chamber cylinder the number of control modes can be increased. In this paper, a three-chamber cylinder is studied using measurements and simulations. The control of the cylinder is presented and measurements are done in a 1-DOF boom mock-up to show the operation of the system in practice. A simulation model is built to investigate further the energy saving capability of the system. The studies show that losses can be significantly reduced by replacing traditional cylinder drives with multi-chamber cylinders.

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Author Biographies

Mikko Huova, Tampere University of Technology, Department of Intelligent Hydraulics and Automation P.O.Box 589, FI-33101 Tampere, Finland

Commonly used hydraulic cylinders have a piston and a piston rod. The piston divides the inside of the cylinder in two chambers and pressures which affect how the piston generates the linear motion. Use of distributed valve system enables several control modes in a system of this type because different control edges can be controlled independently. These control modes can be used for decreasing energy consumption and improving controllability. The traditional hydraulic cylinder has only a limited number of control modes, but by utilizing a multi-chamber cylinder the number of control modes can be increased. In this paper, a three-chamber cylinder is studied using measurements and simulations. The control of the cylinder is presented and measurements are done in a 1-DOF boom mock-up to show the operation of the system in practice. A simulation model is built to investigate further the energy saving capability of the system. The studies show that losses can be significantly reduced by replacing traditional cylinder drives with multi-chamber cylinders.

Arto Laamanen, Tampere University of Technology, Department of Intelligent Hydraulics and Automation P.O.Box 589, FI-33101 Tampere, Finland

Arto Laamanen Born on January 20th 1977 in Taipalsaari (Finland). He received his PhD degree from Tampere University of technology (TUT) in 2009. His dissertation was dealing with the minimization of state transition uncertainty in digital valve system. He is now working as a Postdoctoral Research Fellow at the Department of Intelligent Hydraulics and Automation (IHA).

Matti Linjama, Tampere University of Technology, Department of Intelligent Hydraulics and Automation P.O.Box 589, FI-33101 Tampere, Finland

Matti Linjama (Born 4th July 1971) is Adjunct professor and works at the Department of Intelligent Hydraulics and Automation (IHA), Tampere University of Technology (TUT), Finland. He graduated as Dr. Tech in 1998. He started the study of digital hydraulics in 2000 and has focused on the topic since. Currently he is leader of digital hydraulics research group in IHA and his professional interests include the study of hydraulic systems with high energy efficiency. He is also teaching at IHA and subjects include simulation of hydraulic systems and digital hydraulics.

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Published

2010-11-01

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Original Article

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