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Graphic Method to Evaluate Power Requirements of a Hydraulic System Using Load-Holding Valves

Author

Listed:
  • Luis Javier Berne

    (IHBER, Polígono Malpica, Calle F, Nave 65, 50016 Zaragoza, Spain)

  • Gustavo Raush

    (CATMech, Department of Fluid Mechanics, Universitat Politcnica de Catalunya, Colom 7, 08222 Terrassa, Spain)

  • Pedro Roquet

    (ROQCAR, Antonio Figueras 68, 08551 Tona, Spain)

  • Pedro-Javier Gamez-Montero

    (CATMech, Department of Fluid Mechanics, Universitat Politcnica de Catalunya, Colom 7, 08222 Terrassa, Spain)

  • Esteban Codina

    (CATMech, Department of Fluid Mechanics, Universitat Politcnica de Catalunya, Colom 7, 08222 Terrassa, Spain)

Abstract

It is very well known that the use of a load-holding valve (LHV) in a hydraulic system introduces additional energy consumption. This article presented a simplified graphical method for analyzing the power requirements of hydraulic systems equipped with load-holding valves for overrunning load control. The method helps to understand the performance of load-holding valves during actuator movement. In addition, it allows visualization of the influence on the overall system consumption of the main parameters (pilot ratio, set pressure) and others such as flow rate, back pressure, and load force. The method is attractive because, with only the pressures at the three ports and the valve relief function curve, it is sufficient to evaluate the energy consumption and to define the power ratio as an index indicating the percentage of energy that is to be used to open the LHV valve. The method was applied to real cases, in particular to two types of lifting mobile machines. It was validated following several outdoor tests on two mobile machines where experimental data were obtained. During tests, both machines were equipped with a set of seven different performance LHV valves. The described method could be beneficial for hydraulic machine manufacturers engaged in designing lifting devices when selecting a suitable valve for energy efficiency applications, especially now that the trend towards electrification is a reality.

Suggested Citation

  • Luis Javier Berne & Gustavo Raush & Pedro Roquet & Pedro-Javier Gamez-Montero & Esteban Codina, 2022. "Graphic Method to Evaluate Power Requirements of a Hydraulic System Using Load-Holding Valves," Energies, MDPI, vol. 15(13), pages 1-23, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4558-:d:845008
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    References listed on IDEAS

    as
    1. Pedro Roquet & Gustavo Raush & Luis Javier Berne & Pedro-Javier Gamez-Montero & Esteban Codina, 2022. "Energy Key Performance Indicators for Mobile Machinery," Energies, MDPI, vol. 15(4), pages 1-16, February.
    2. Milos Vukovic & Roland Leifeld & Hubertus Murrenhoff, 2017. "Reducing Fuel Consumption in Hydraulic Excavators—A Comprehensive Analysis," Energies, MDPI, vol. 10(5), pages 1-25, May.
    3. Luis Javier Berne & Gustavo Raush & Pedro Javier Gamez-Montero & Pedro Roquet & Esteban Codina, 2021. "Multi-Point-of-View Energy Loss Analysis in a Refuse Truck Hydraulic System," Energies, MDPI, vol. 14(9), pages 1-24, May.
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