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Using a Genetic Algorithm to Achieve Optimal Matching between PMEP and Diameter of Intake and Exhaust Throat of a High-Boost-Ratio Engine

Author

Listed:
  • Yindong Song

    (School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

  • Yiyu Xu

    (School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

  • Xiuwei Cheng

    (China North Engine Research Institute, Tianjin 300400, China)

  • Ziyu Wang

    (China North Engine Research Institute, Tianjin 300400, China)

  • Weiqing Zhu

    (China North Engine Research Institute, Tianjin 300400, China)

  • Xinyu Fan

    (School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

Abstract

With the increasingly stringent CO 2 emission regulations, the degree of strengthening of the engines is increasing. Under high-pressure conditions, the airway throat parts of the intake and exhaust systems have a great influence on the flow loss of the diesel engine. The reasonable distribution of the throat area of the intake and exhaust ports in the limited cylinder headspace is key to improving the performance of supercharged engines. This study took a large-bore, high-pressure ratio diesel engine as the research object. Firstly, the three-dimensional (3D) flow simulation method was used to reveal the influence law of different throat areas on the engine intake and exhaust flow under steady-state conditions, and a steady-flow test bench was built to verify the accuracy of the simulation model and law. Secondly, based on the 3D steady-state calculation and test results, a more accurate one-dimensional simulation model was constructed, and a joint optimization simulation platform was established based on the dynamic data link library. On this basis, the mathematical description of the multi-objective optimization of airway throat size was established using machine learning methods, such as a genetic algorithm, the design domain and boundary conditions of variable parameters were clarified, and the collaborative optimization objective of integrated flow coefficient and flow loss is proposed to achieve the fast and accurate optimization of intake and exhaust throat diameters.

Suggested Citation

  • Yindong Song & Yiyu Xu & Xiuwei Cheng & Ziyu Wang & Weiqing Zhu & Xinyu Fan, 2022. "Using a Genetic Algorithm to Achieve Optimal Matching between PMEP and Diameter of Intake and Exhaust Throat of a High-Boost-Ratio Engine," Energies, MDPI, vol. 15(5), pages 1-17, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:5:p:1607-:d:755251
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    References listed on IDEAS

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    1. Millo, Federico & Arya, Pranav & Mallamo, Fabio, 2018. "Optimization of automotive diesel engine calibration using genetic algorithm techniques," Energy, Elsevier, vol. 158(C), pages 807-819.
    2. Kaushal Nishad & Florian Ries & Yongxiang Li & Amsini Sadiki, 2019. "Numerical Investigation of Flow through a Valve during Charge Intake in a DISI -Engine Using Large Eddy Simulation," Energies, MDPI, vol. 12(13), pages 1-20, July.
    3. Tianyou Wang & Daming Liu & Gangde Wang & Bingqian Tan & Zhijun Peng, 2015. "Effects of Variable Valve Lift on In-Cylinder Air Motion," Energies, MDPI, vol. 8(12), pages 1-18, December.
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