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Simulation about the Effect of the Height-to-Stroke Ratios of Ports on Power and Emissions in an OP2S Engine Using Diesel/Methanol Blends

Author

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  • Wei Yang

    (School of Energy and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

  • Lei Zhang

    (School of Energy and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

  • Fukang Ma

    (School of Energy and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

  • Dan Xu

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

  • Wenjing Ji

    (School of Energy and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

  • Yangyang Zhao

    (School of Energy and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

  • Jianing Zhang

    (School of Energy and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

Abstract

Zero carbon emissions will dominate the future of internal combustion engines (ICEs). Existing technology has pushed the performance of ICEs operating on traditional working principles to almost reach their limit. The new generation of ICEs needs to explore new efficient combustion modes. For new combustion modes to simplify the emission after treatment, the opposed-piston, two-stroke (OP2S) diesel engine is a powertrain with great potential value. Combined with dual-fuel technology, the OP2S diesel engine can effectively reduce carbon emissions to achieve clean combustion. Hence, methanol/diesel dual fuel was burnt in the OP2S engine to create a clean combustion mode for future demands. In the present work, a 1D simulation model of an OP2S diesel engine was established and verified. We investigated the influence of port height to stroke ratio (HSR) on power and emission performances of the OP2S diesel engine under different methanol ratios. The results show that the methanol ratio extremely influences the indicated power (IP) with the HSR of intake ports increasing. The IP decreases by about 1.8–2.0% for every 5% increase in methanol. Correspondingly, the methanol ratio extremely influences the indicated thermal efficiency (ITE), with the HSR of exhaust ports increasing. The ITE increases by about 2.1–3.1% for every 5% increase in methanol. The increasing methanol ratio reduces the HSR of ports for the optimal IP and ITE. To balance power performance and emission performance, the methanol ratio should be kept to 10–15%.

Suggested Citation

  • Wei Yang & Lei Zhang & Fukang Ma & Dan Xu & Wenjing Ji & Yangyang Zhao & Jianing Zhang, 2022. "Simulation about the Effect of the Height-to-Stroke Ratios of Ports on Power and Emissions in an OP2S Engine Using Diesel/Methanol Blends," Energies, MDPI, vol. 15(8), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:8:p:2942-:d:795819
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    References listed on IDEAS

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