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Research on a Hydraulic Cylinder Pressure Control Method for Efficient Traction Operation in Electro-Hydraulic Hitch System of Electric Tractors

Author

Listed:
  • Zhenhao Luo

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Jihang Wang

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Jing Wu

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Shengli Zhang

    (BYD Company Limited, Shenzhen 518122, China)

  • Zhongju Chen

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Bin Xie

    (College of Engineering, China Agricultural University, Beijing 100083, China)

Abstract
The tractor is the primary power device of the agricultural production process. For the problem that the traditional electro-hydraulic hitch control method for tractors cannot simultaneously meet the requirements of maintaining a constant ploughing depth and improving traction performance and electric tractor overall efficiency, this paper proposes a hydraulic cylinder pressure control method of the electro-hydraulic hitch system for electric tractors. We establish a tractor-implement system dynamic model, calculate the rear axle load of the tractor in real-time according to the actual working parameters under the premise of ensuring the constant ploughing depth, construct a traction performance objective optimization function, and use the genetic algorithm to solve the optimal hydraulic cylinder pressure value of the electro-hydraulic hitch system. Hardware-in-the-loop (HIL) simulation results show that the electric tractor under the traditional position control method and the hydraulic cylinder pressure control method has an average wheel slip of 18.50% and 16.93%, an average traction efficiency of 71.35% and 73.08%, and an average overall efficiency of 50.81% and 52.40%. The hydraulic cylinder pressure control method proposed in this paper reduces the wheel slip by 9.27%, increases the traction efficiency by 2.42%, improves the electric tractor overall efficiency by 3.13%, and reduces the electric tractor overall energy loss by 7.67% compared with the traditional position-control method. Therefore, the hydraulic cylinder pressure control method of the electro-hydraulic hitch system proposed in this paper can achieve the purpose of effectively improving tractor traction performance and reducing tractor energy loss while maintaining a constant ploughing depth. This study offers technological references for electric tractors to improve traction performance and reduce the overall energy loss of electric tractors.

Suggested Citation

  • Zhenhao Luo & Jihang Wang & Jing Wu & Shengli Zhang & Zhongju Chen & Bin Xie, 2023. "Research on a Hydraulic Cylinder Pressure Control Method for Efficient Traction Operation in Electro-Hydraulic Hitch System of Electric Tractors," Agriculture, MDPI, vol. 13(8), pages 1-18, August.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:8:p:1555-:d:1210001
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    References listed on IDEAS

    as
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    Cited by:

    1. Adam Szabo & Daniel Karoly Doba & Szilard Aradi & Peter Kiss, 2024. "Model Development for Off-Road Traction Control: A Linear Parameter-Varying Approach," Agriculture, MDPI, vol. 14(3), pages 1-16, March.

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