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Investigation on performance of a spark-ignition engine fueled with dimethyl ether and gasoline mixtures under idle and stoichiometric conditions

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  • Ji, Changwei
  • Shi, Lei
  • Wang, Shuofeng
  • Cong, Xiaoyu
  • Su, Teng
  • Yu, Menghui

Abstract

This study investigated effects of dimethyl ether addition on the gasoline engine combustion and emissions performance under idle and stoichiometric conditions. The engine was first modified to be fueled with gasoline and dimethyl ether simultaneously. The experimental results showed that, with the increase of dimethyl ether energy fraction in the total fuel, the total fuel energy flow rate was decreased, and the flame development and propagation periods were shortened. The cycle-to-cycle variation was reduced and the degree of constant volume combustion was increased after the dimethyl ether addition. The dimethyl ether blending was beneficial for reducing hydrocarbon and nitrogen oxide emissions from 1951 and 95 ppm of the original engine to 552 and 34 ppm of pure dimethyl ether, respectively. Meanwhile, with the increase of dimethyl ether addition level, the peak cylinder pressure and carbon monoxide emission were decreased at first, whereas increased when the dimethyl ether energy fraction exceeded 49%. Furthermore, heat release rate during the low temperature reaction was enhanced with the increase of dimethyl ether addition level. The maximum heat release rate was heightened and its relevant crank angle was advanced during the high temperature reaction period after the dimethyl ether enrichment.

Suggested Citation

  • Ji, Changwei & Shi, Lei & Wang, Shuofeng & Cong, Xiaoyu & Su, Teng & Yu, Menghui, 2017. "Investigation on performance of a spark-ignition engine fueled with dimethyl ether and gasoline mixtures under idle and stoichiometric conditions," Energy, Elsevier, vol. 126(C), pages 335-342.
    • Handle: RePEc:eee:energy:v:126:y:2017:i:c:p:335-342
    DOI: 10.1016/j.energy.2017.03.045
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    5. Huang, Haozhong & Liu, Qingsheng & Teng, Wenwen & Pan, Mingzhang & Liu, Chang & Wang, Qingxin, 2018. "Improvement of combustion performance and emissions in diesel engines by fueling n-butanol/diesel/PODE3–4 mixtures," Applied Energy, Elsevier, vol. 227(C), pages 38-48.
    6. Sun, Yao & Yu, Xiumin & Dong, Wei & Chen, Hong & Hu, Yunfeng, 2018. "Effect of split injection on particle number (PN) emissions in GDI engine at fast-idle through integrated analysis of optics and mechanics," Energy, Elsevier, vol. 165(PB), pages 55-67.
    7. 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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