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Modeling and simulation of hydrostatic transmission system with energy regeneration using hydraulic accumulator

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Abstract

A new hydraulic closed-loop hydrostatic transmission (HST) energy-saving system is proposed in this paper. The system improves the efficiency of the primary power source. Furthermore, the system is energy regenerative, highly efficient even under partial load conditions. It can work in either a flow or pressure coupling configuration, allowing it to avoid the disadvantages of each configuration. A hydraulic accumulator, the key component of the energy regenerative modality, can be decoupled from or coupled to the HST circuit to improve the efficiency of the system in low-speed, high-torque situations. The accumulator is used in a novel way to recover the kinetic energy without reversion of fluid flow. Both variable displacement hydraulic pump /motors are used when the system operates in the flow coupling configuration so as to enable it to meet the difficult requirements of some industrial and mobile applications. Modeling and a simulation were undertaken with regard to testing the primary energy sources in the two configurations and recovering the energy potential of the system. The results indicated that the low efficiency of traditional HSTs under partial load conditions can be improved by utilizing the pressure coupling configuration. The round-trip efficiency of the system in the energy recovery testing varied from 32% to 66% when the losses of the load were taken into account.

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Authors and Affiliations

  1. Graduate School of Mechanical and Automotive Engineering, University of Ulsan, Ulsan, Korea

    Triet Hung Ho

  2. School of Mechanical and Automotive Engineering, University of Ulsan, Ulsan, Korea

    Kyoung Kwan Ahn

Authors
  1. Triet Hung Ho
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  2. Kyoung Kwan Ahn
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Corresponding author

Correspondence to Kyoung Kwan Ahn.

Additional information

This paper was recommended for publication in revised form by Associate Editor Kyungsu Yi

Triet Hung Ho received B.S. and M.S. degrees from Hochiminh City University of Technology in 2002 and 2004, respectively, both in Mechanical En-gineering. He is currently a Doctoral Candidate in the department of Mechanical and Automotive Engineering, University of Ulsan, Ulsan, Korea. His research interests are focused on hydraulic control systems and energy saving in hydraulic systems.

Kyoung Kwan Ahn received a B.S. degree in Mechanical Engineering from Seoul National University in 1990, an M. Sc. degree in Mechanical Engineering from the Korea Advanced Institute of Science and Technology (KAIST) in 1992, and a Ph.D. degree (dissertation title: “A study on the automation of outdoor tasks using 2 link electro-hydraulic manipulator”) from the Tokyo Institute of Technology in 1999, respectively. He is currently a Professor in the School of Mechanical and Automotive Engineering, University of Ulsan, Ulsan, Korea. His research interests are design and control of smart actuator using smart material, fluid power control and active damping control. He is a Member of IEEE, ASME, SICE, RSJ, JSME, KSME, KSPE, KSAE, KFPS, and JFPS.

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Ho, T.H., Ahn, K.K. Modeling and simulation of hydrostatic transmission system with energy regeneration using hydraulic accumulator. J Mech Sci Technol 24, 1163–1175 (2010). https://doi.org/10.1007/s12206-010-0313-8

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  • DOI: https://doi.org/10.1007/s12206-010-0313-8

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