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Effects of injection strategies on the flow and fuel behavior characteristics in port dual injection engine

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  • Lee, Seung Yeob
  • Lee, Ho Jun
  • Kang, Yong Tae
  • Chung, Jin Taek

Abstract

The port dual injection (PDI) technology is proposed to improve the fuel efficiency and emission characteristics of the downsized SI engine by adding an injector to the intake port. For effective design of the PDI engine, the effects of additional design parameters on the engine performance due to the added injector should be taken in to account. In this study, we analyze the effects of the fuel injection timing and injection targeting related to the injection strategies of the PDI engine on the internal flow and fuel behavior characteristics using computational fluid dynamics (CFD). The CFD analysis is conducted using the STAR-CD, a three-dimensional unsteady simulation program. To confirm the accuracy of CFD analysis, the experimental verification is carried out. The liquid fuel films, evaporated fuel and air-fuel mixture uniformity affecting the fuel efficiency and emissions of the engine are analyzed at various injection conditions. It is concluded that the fuel film amount decreases by approximately 73.04% compared to the standard injection method when the engine is operated at the optimum conditions selected in this study.

Suggested Citation

  • Lee, Seung Yeob & Lee, Ho Jun & Kang, Yong Tae & Chung, Jin Taek, 2018. "Effects of injection strategies on the flow and fuel behavior characteristics in port dual injection engine," Energy, Elsevier, vol. 165(PA), pages 666-676.
    • Handle: RePEc:eee:energy:v:165:y:2018:i:pa:p:666-676
    DOI: 10.1016/j.energy.2018.09.026
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    References listed on IDEAS

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    1. Moon, Seoksu & Li, Tianyun & Sato, Kiyotaka & Yokohata, Hideaki, 2017. "Governing parameters and dynamics of turbulent spray atomization from modern GDI injectors," Energy, Elsevier, vol. 127(C), pages 89-100.
    2. Thangavel, Venugopal & Momula, Sai Yashwanth & Gosala, Dheeraj Bharadwaj & Asvathanarayanan, Ramesh, 2016. "Experimental studies on simultaneous injection of ethanol–gasoline and n-butanol–gasoline in the intake port of a four stroke SI engine," Renewable Energy, Elsevier, vol. 91(C), pages 347-360.
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    Cited by:

    1. Chen, Lin & Pan, Jiaying & Liu, Changwen & Shu, Gequn & Wei, Haiqiao, 2020. "Effect of rapid combustion on engine performance and knocking characteristics under different spark strategy conditions," Energy, Elsevier, vol. 192(C).
    2. Huang, Yuhan & Surawski, Nic C. & Zhuang, Yuan & Zhou, John L. & Hong, Guang, 2021. "Dual injection: An effective and efficient technology to use renewable fuels in spark ignition engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).

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