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Numerical Investigation of the Effects of Split Injection Strategies on Combustion and Emission in an Opposed-Piston, Opposed-Cylinder (OPOC) Two-Stroke Diesel Engine

Author

Listed:
  • Lei Zhang

    (College of Mechatronic Engineering, North University of China, University Road No. 3, Taiyuan 030051, China)

  • Tiexiong Su

    (College of Mechatronic Engineering, North University of China, University Road No. 3, Taiyuan 030051, China)

  • Yangang Zhang

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

  • Fukang Ma

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

  • Jinguan Yin

    (College of Mechatronic Engineering, North University of China, University Road No. 3, Taiyuan 030051, China)

  • Yaonan Feng

    (College of Mechatronic Engineering, North University of China, University Road No. 3, Taiyuan 030051, China)

Abstract

In opposed-piston, opposed-cylinder (OPOC) two-stroke diesel engines, the relative movement rules of opposed-pistons, combustion chamber components and injector position are different from those of conventional diesel engines. In this study, the combustion and emission characteristics of the OPOC which is equipped with a common-rail injection system are investigated by experimental and numerical simulation. Different split injection strategies involving different pilot injection/fuel mass ratios and injection intervals were compared with a single injection strategy. The numerical simulation was applied to calculate and analyze the effect of split injection strategies on the combustion and emission after validation with the same experimental result (single injection strategy). Results showed that using split injection had a significant beneficial effect on the combustion process, because of the acceleration effect that enhances the air-fuel mixture. Additionally, the temperature of the split injection strategies was higher than that of single strategy, leading to the nitrogen oxides (NO x ) increasing and soot decreasing. In addition, it has been found that the split injection condition with a smaller pilot injection/fuel mass ratio and a medium injection interval performed better than the single injection condition in terms of the thermo-atmosphere utilization and space utilization.

Suggested Citation

  • Lei Zhang & Tiexiong Su & Yangang Zhang & Fukang Ma & Jinguan Yin & Yaonan Feng, 2017. "Numerical Investigation of the Effects of Split Injection Strategies on Combustion and Emission in an Opposed-Piston, Opposed-Cylinder (OPOC) Two-Stroke Diesel Engine," Energies, MDPI, vol. 10(5), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:5:p:684-:d:98534
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    References listed on IDEAS

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    1. Wang, Xiangang & Huang, Zuohua & Zhang, Wu & Kuti, Olawole Abiola & Nishida, Keiya, 2011. "Effects of ultra-high injection pressure and micro-hole nozzle on flame structure and soot formation of impinging diesel spray," Applied Energy, Elsevier, vol. 88(5), pages 1620-1628, May.
    2. Fukang Ma & Changlu Zhao & Fujun Zhang & Zhenfeng Zhao & Zhenyu Zhang & Zhaoyi Xie & Hao Wang, 2015. "An Experimental Investigation on the Combustion and Heat Release Characteristics of an Opposed-Piston Folded-Cranktrain Diesel Engine," Energies, MDPI, vol. 8(7), pages 1-17, June.
    3. Li, Xiangrong & Gao, Haobu & Zhao, Luming & Zhang, Zheng & He, Xu & Liu, Fushui, 2016. "Combustion and emission performance of a split injection diesel engine in a double swirl combustion system," Energy, Elsevier, vol. 114(C), pages 1135-1146.
    4. Mohan, Balaji & Yang, Wenming & Chou, Siaw kiang, 2013. "Fuel injection strategies for performance improvement and emissions reduction in compression ignition engines—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 664-676.
    5. Fukang Ma & Changlu Zhao & Fujun Zhang & Zhenfeng Zhao & Shuanlu Zhang, 2015. "Effects of Scavenging System Configuration on In-Cylinder Air Flow Organization of an Opposed-Piston Two-Stroke Engine," Energies, MDPI, vol. 8(6), pages 1-19, June.
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    Cited by:

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    2. Zhongbo Zhang & Lifu Li, 2018. "Investigation of In-Cylinder Steam Injection in a Turbocharged Diesel Engine for Waste Heat Recovery and NO x Emission Control," Energies, MDPI, vol. 11(4), pages 1-22, April.

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