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Effect of injection timing on mixture formation and combustion in an ethanol direct injection plus gasoline port injection (EDI+GPI) engine

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  • Huang, Yuhan
  • Hong, Guang
  • Huang, Ronghua

Abstract

Ethanol direct injection plus gasoline port injection (EDI+GPI) is a new technology to utilise ethanol fuel more effectively and efficiently in spark-ignition engines by taking the advantages of ethanol fuel and direct injection, such as the cooling effect and anti-knock ability. A full cycle numerical modelling including both port and direct injection sprays was performed to understand the mechanisms behind the experimental results of the EDI+GPI engine. The turbulence-chemistry interaction of the two-fraction-mixture partially premixed combustion was solved by a five-dimensional presumed Probability Density Function table. Effects of direct injection timing on fuel evaporation, mixing, wall-wetting, combustion and emission processes were investigated. The results showed that when the direct injection timing was retarded, the mixture around the spark plug became leaner and the distribution of equivalence ratio became more uneven. Moreover, late direct injection resulted in severe fuel impingement and caused local over-cooling effect and over-rich mixture. Consequently, the combustion speed and temperature were decreased by retarded direct injection timing, leading to reduced NO emission and increased HC and CO emissions. Finally, numerical modelling was performed to investigate the strategy of injecting small amount of ethanol fuel on reducing the fuel impingement and incomplete combustion caused by late direct injection.

Suggested Citation

  • Huang, Yuhan & Hong, Guang & Huang, Ronghua, 2016. "Effect of injection timing on mixture formation and combustion in an ethanol direct injection plus gasoline port injection (EDI+GPI) engine," Energy, Elsevier, vol. 111(C), pages 92-103.
    • Handle: RePEc:eee:energy:v:111:y:2016:i:c:p:92-103
    DOI: 10.1016/j.energy.2016.05.109
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    Cited by:

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    5. Fan, Baowei & Pan, Jianfeng & Yang, Wenming & Pan, Zhenhua & Bani, Stephen & Chen, Wei & He, Ren, 2017. "Combined effect of injection timing and injection angle on mixture formation and combustion process in a direct injection (DI) natural gas rotary engine," Energy, Elsevier, vol. 128(C), pages 519-530.
    6. Feng, Dengquan & Wei, Haiqiao & Pan, Mingzhang & Zhou, Lei & Hua, Jianxiong, 2018. "Combustion performance of dual-injection using n-butanol direct-injection and gasoline port fuel-injection in a SI engine," Energy, Elsevier, vol. 160(C), pages 573-581.
    7. Yu, Xiumin & Guo, Zezhou & Sun, Ping & Wang, Sen & Li, Anshi & Yang, Hang & Li, Zhe & Liu, Ze & Li, Jingyuan & Shang, Zhen, 2019. "Investigation of combustion and emissions of an SI engine with ethanol port injection and gasoline direct injection under lean burn conditions," Energy, Elsevier, vol. 189(C).
    8. Zhiyue Mu & Jianqin Fu & Feng Zhou & Kainan Yuan & Juan Yu & Dan Huang & Zhuangping Cui & Xiongbo Duan & Jingping Liu, 2023. "A Comparatively Experimental Study on the Performance and Emission Characteristics of a Diesel Engine Fueled with Tung Oil-Based Biodiesel Blends (B10, B20, B50)," Energies, MDPI, vol. 16(14), pages 1-15, July.
    9. Yang, Jinxin & Ji, Changwei & Wang, Shuofeng & Wang, Du & Ma, Zedong & Zhang, Boya, 2018. "Numerical investigation on the mixture formation and combustion processes of a gasoline rotary engine with direct injected hydrogen enrichment," Applied Energy, Elsevier, vol. 224(C), pages 34-41.
    10. Zhen Shang & Yao Sun & Xiumin Yu & Ling He & Luquan Ren, 2023. "Effect of Hydrogen-Rich Syngas Direct Injection on Combustion and Emissions in a Combined Fuel Injection—Spark-Ignition Engine," Sustainability, MDPI, vol. 15(11), pages 1-15, May.
    11. Jiang, Chenxu & Li, Zilong & Qian, Yong & Wang, Xiaole & Zhang, Yahui & Lu, Xingcai, 2018. "Influences of fuel injection strategies on combustion performance and regular/irregular emissions in a turbocharged gasoline direct injection engine: Commercial gasoline versus multi-components gasoli," Energy, Elsevier, vol. 157(C), pages 173-187.
    12. 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).
    13. Kumar, T. Sathish & Ashok, B., 2021. "Critical review on combustion phenomena of low carbon alcohols in SI engine with its challenges and future directions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 152(C).
    14. Shi, Weibo & Li, Zihang & Zhao, Zhe & Yu, Xiumin & Sun, Ping & Sang, Tao & Dong, Wei & Li, Ming, 2024. "A renewable clean energy application: Oxyhydrogen negative pressure inhalation for enhancing the combustion and emission characteristics of isopropanol/gasoline dual-fuel combined injection engine," Energy, Elsevier, vol. 290(C).
    15. Duan, Xiongbo & Liu, Jingping & Tan, Yonghao & Luo, Baojun & Guo, Genmiao & Wu, Zhenkuo & Liu, Weiqiang & Li, Yangyang, 2018. "Influence of single injection and two-stagnation injection strategy on thermodynamic process and performance of a turbocharged direct-injection spark-ignition engine fuelled with ethanol and gasoline ," Applied Energy, Elsevier, vol. 228(C), pages 942-953.
    16. Seifi, Mohammad Reza & Desideri, Umberto & Ghorbani, Zahra & Antonelli, Marco & Frigo, Stefano & Hassan-Beygi, Seyed Reza & Ghobadian, Barat, 2019. "Statistical evaluation of the effect of water percentage in water-diesel emulsion on the engine performance and exhaust emission parameters," Energy, Elsevier, vol. 180(C), pages 797-806.

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