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Knock characteristics of SI engine fueled with n-butanol in combination with different EGR rate

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  • Wei, Haiqiao
  • Feng, Dengquan
  • Pan, Jiaying
  • Shao, Aifang
  • Pan, Mingzhang

Abstract

Knock is one of the main obstacles for optimizing combustion process of SI engines fueled with alternative biomass fuel n-butanol. In this paper, knock characteristic of SI engine fueled with n-butanol and RON 92 gasoline is studied on a single cylinder SI engine. The onset timing, intensity and frequency of knock for these two fuels at different EGR rate are compared. Additionally, the effects of different compression ratios and intake pressures on knock intensity of SI engine are also studied and results are presented. The study results show that EGR can decrease knock intensity and delay knock onset timing due to its cooling and dilution effects. It is observed under a low EGR rate of 3%, knock intensity of n-butanol is significantly reduced whereas combustion pressure has negligible change. The probability distribution of n-butanol knock intensity is more concentrated compared with that of gasoline under a given EGR rate, which indicated n-butanol had smaller combustion variations. The application of EGR on high intake pressure and high compression ratio n-butanol engine can effectively suppression knock combustion.

Suggested Citation

  • Wei, Haiqiao & Feng, Dengquan & Pan, Jiaying & Shao, Aifang & Pan, Mingzhang, 2017. "Knock characteristics of SI engine fueled with n-butanol in combination with different EGR rate," Energy, Elsevier, vol. 118(C), pages 190-196.
    • Handle: RePEc:eee:energy:v:118:y:2017:i:c:p:190-196
    DOI: 10.1016/j.energy.2016.11.134
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    Cited by:

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    8. Wei, Haiqiao & Hua, Jianxiong & Pan, Mingzhang & Feng, Dengquan & Zhou, Lei & Pan, Jiaying, 2018. "Experimental investigation on knocking combustion characteristics of gasoline compression ignition engine," Energy, Elsevier, vol. 143(C), pages 624-633.
    9. Tornatore, Cinzia & Bozza, Fabio & De Bellis, Vincenzo & Teodosio, Luigi & Valentino, Gerardo & Marchitto, Luca, 2019. "Experimental and numerical study on the influence of cooled EGR on knock tendency, performance and emissions of a downsized spark-ignition engine," Energy, Elsevier, vol. 172(C), pages 968-976.
    10. Zhen, Xudong & Tian, Zhi & Wang, Yang & Xu, Meng & Liu, Daming & Li, Xiaoyan, 2022. "Knock analysis of bio-butanol in TISI engine based on chemical reaction kinetics," Energy, Elsevier, vol. 239(PC).
    11. Lei Zhou & Xiaojun Zhang & Lijia Zhong & Jie Yu, 2020. "Effects of Flame Propagation Velocity and Turbulence Intensity on End-Gas Auto-Ignition in a Spark Ignition Gasoline Engine," Energies, MDPI, vol. 13(19), pages 1-23, September.
    12. 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.
    13. Janos Lucian Breuer & Juri Scholten & Jan Christian Koj & Felix Schorn & Marc Fiebrandt & Remzi Can Samsun & Rolf Albus & Klaus Görner & Detlef Stolten & Ralf Peters, 2022. "An Overview of Promising Alternative Fuels for Road, Rail, Air, and Inland Waterway Transport in Germany," Energies, MDPI, vol. 15(4), pages 1-65, February.
    14. Chen, Lin & Zhang, Ren & Pan, Jiaying & Wei, Haiqiao, 2020. "Effects of partitioned fuel distribution on auto-ignition and knocking under spark assisted compression ignition conditions," Applied Energy, Elsevier, vol. 260(C).
    15. Zhou, Lei & Kang, Rui & Wei, Haiqiao & Feng, Dengquan & Hua, Jianxiong & Pan, Jiaying & Chen, Rui, 2018. "Experimental analysis of super-knock occurrence based on a spark ignition engine with high compression ratio," Energy, Elsevier, vol. 165(PB), pages 68-75.
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    17. Yuan, Zhipeng & Fu, Jianqin & Liu, Qi & Ma, Yinjie & Zhan, Zhangsong, 2018. "Quantitative study on influence factors of power performance of variable valve timing (VVT) engines and correction of its governing equation," Energy, Elsevier, vol. 157(C), pages 314-326.

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