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Effect of injection strategy on cold start firing, combustion and emissions of a LPG/methanol dual-fuel spark-ignition engine

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  • Gong, Changming
  • Liu, Zilong
  • Su, Hang
  • Chen, Yulin
  • Li, Junbo
  • Liu, Fenghua

Abstract

The spark ignition (SI) methanol engine is particularly difficult for cold start at low ambient temperature. Adding liquefied petroleum gas (LPG) can ensure a successful cold start of SI methanol engine. Based on a single-cycle fuel injection strategy, the effects of the amount and injection timings of methanol and LPG per cycle were experimentally investigated on cold start firing and emissions of a LPG/methanol dual-fuel SI engine. The results show that the minimum amount of LPG injected per cycle is the key factor to determine the reliable firing of LPG/methanol engines at low ambient temperatures. In order to form an ideal mixture in the firing cycle, 300 °CA injection interval between methanol and LPG is feasible to be used. Fuel injection parameters have great influences on the HC emissions, which are 74.4% lower under critical firing than that of misfiring mode. By altering injection parameters, unburned methanol shows opposite tendencies with formaldehyde emissions and similar tendencies with HC emissions.

Suggested Citation

  • Gong, Changming & Liu, Zilong & Su, Hang & Chen, Yulin & Li, Junbo & Liu, Fenghua, 2019. "Effect of injection strategy on cold start firing, combustion and emissions of a LPG/methanol dual-fuel spark-ignition engine," Energy, Elsevier, vol. 178(C), pages 126-133.
    • Handle: RePEc:eee:energy:v:178:y:2019:i:c:p:126-133
    DOI: 10.1016/j.energy.2019.04.145
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    References listed on IDEAS

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    1. Zhen, Xudong & Wang, Yang & Xu, Shuaiqing & Zhu, Yongsheng, 2013. "Study of knock in a high compression ratio spark-ignition methanol engine by multi-dimensional simulation," Energy, Elsevier, vol. 50(C), pages 150-159.
    2. Gong, Changming & Liu, Jiajun & Peng, Legao & Liu, Fenghua, 2017. "Numerical study of effect of injection and ignition timings on combustion and unregulated emissions of DISI methanol engine during cold start," Renewable Energy, Elsevier, vol. 112(C), pages 457-465.
    3. Li, Zhaohui & Gong, Changming & Qu, Xiang & Liu, Fenghua & Sun, Jingzhen & Wang, Kang & Li, Yufeng, 2015. "Critical firing and misfiring boundary in a spark ignition methanol engine during cold start based on single cycle fuel injection," Energy, Elsevier, vol. 89(C), pages 236-243.
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    6. Gong, Changming & Wei, Fuxing & Si, Xiankai & Liu, Fenghua, 2018. "Effects of injection timing of methanol and LPG proportion on cold start characteristics of SI methanol engine with LPG enriched port injection under cycle-by-cycle control," Energy, Elsevier, vol. 144(C), pages 54-60.
    7. Gong, Changming & Huang, Kuo & Deng, Baoqing & Liu, Xunjun, 2011. "Catalyst light-off behavior of a spark-ignition LPG (liquefied petroleum gas) engine during cold start," Energy, Elsevier, vol. 36(1), pages 53-59.
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    Cited by:

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    2. Gong, Changming & Yi, Lin & Wang, Kang & Huang, Kuo & Liu, Fenghua, 2020. "Numerical modeling of plasma-assisted combustion effects on firing and intermediates in the combustion process of methanol–air mixtures," Energy, Elsevier, vol. 192(C).
    3. Fekadu Mosisa Wako & Gianmaria Pio & Ernesto Salzano, 2020. "The Effect of Hydrogen Addition on Low-Temperature Combustion of Light Hydrocarbons and Alcohols," Energies, MDPI, vol. 13(15), pages 1-14, July.
    4. Jeyaseelan, Thangaraja & Ekambaram, Porpatham & Subramanian, Jayagopal & Shamim, Tariq, 2022. "A comprehensive review on the current trends, challenges and future prospects for sustainable mobility," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).
    5. Dinesh, M.H. & Pandey, Jayashish Kumar & Kumar, G.N., 2022. "Effect of parallel LPG fuelling in a methanol fuelled SI engine under variable compression ratio," Energy, Elsevier, vol. 239(PC).
    6. Pandey, Jayashish Kumar & Kumar, G.N., 2022. "Effects of hydrogen assisted combustion of EBNOL IN SI engines under variable compression ratio and ignition timing," Energy, Elsevier, vol. 246(C).
    7. Gong, Changming & Yi, Lin & Wang, Kang & Huang, Kuo & Liu, Fenghua, 2020. "Numerical study on electron energy distribution characteristics and evolution of active particles of methanol-air mixture by non-equilibrium plasma," Energy, Elsevier, vol. 193(C).

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