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Research into Energy-Saving Control Strategies of a Bulldozer Driven by a Torque Converter Based on the Minimum Fuel Consumption Rate of the Whole Machine

Author

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  • Hongbin Qiang

    (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China
    Jiangsu Provincial Engineering Research Center for Advanced Fluid Power and Equipment, Changzhou 213001, China)

  • He Li

    (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China)

  • Shaopeng Kang

    (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China
    Jiangsu Provincial Engineering Research Center for Advanced Fluid Power and Equipment, Changzhou 213001, China)

  • Kailei Liu

    (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China
    Jiangsu Provincial Engineering Research Center for Advanced Fluid Power and Equipment, Changzhou 213001, China)

  • Jing Yang

    (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China
    Jiangsu Provincial Engineering Research Center for Advanced Fluid Power and Equipment, Changzhou 213001, China)

  • Lian Wang

    (School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China)

Abstract

In order to address the issue of poor fuel efficiency in hydraulic bulldozers during operation, this paper proposes a speed–load control strategy aimed at minimizing the overall fuel consumption rate of the machine. First, input–output models of the engine, hydraulic torque converter and the entire vehicle were established. Then, based on the bulldozer’s output power and fuel consumption rate, a performance metric for the overall fuel consumption rate was proposed to reflect the machine’s working efficiency. The characteristics of the overall fuel consumption rate were analyzed under different load, speed, and gear conditions. Next, a work point optimization control strategy was proposed for the whole machine energy-saving mode and constant power mode, aiming to minimize the overall fuel consumption rate while using the load, speed, and gear as control variables. To verify the feasibility of the work point optimization control strategy, simulations were conducted for both the energy-saving and constant power modes. The simulation results showed that in the whole machine energy-saving mode, this control strategy resulted in the lowest fuel consumption compared to constant speed control strategies at 1500, 1700, and 2000 rpm, with significant reductions in most cases. In the constant power mode, a comparison between four optimal operating points and the whole machine energy-saving mode revealed that while the former had slightly higher fuel consumption, it ensured a stable power output. Finally, experimental testing demonstrated that the proposed control strategy reduced the overall fuel consumption rate by 12.5% compared to the constant speed mode, verifying the effectiveness of the strategy. The study concludes that the energy-saving control strategy, through the coordinated switching between the two modes in complex operating conditions, not only ensures a stable power output for the bulldozer but also significantly improves fuel efficiency, providing an important reference for optimizing the efficiency of transmission systems in construction machines.

Suggested Citation

  • Hongbin Qiang & He Li & Shaopeng Kang & Kailei Liu & Jing Yang & Lian Wang, 2024. "Research into Energy-Saving Control Strategies of a Bulldozer Driven by a Torque Converter Based on the Minimum Fuel Consumption Rate of the Whole Machine," Sustainability, MDPI, vol. 16(22), pages 1-19, November.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:22:p:10111-:d:1524813
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    References listed on IDEAS

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    1. Li, Zhenhe & Khajepour, Amir & Song, Jinchun, 2019. "A comprehensive review of the key technologies for pure electric vehicles," Energy, Elsevier, vol. 182(C), pages 824-839.
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