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Numerical evaluation of ignition timing influences on performance of a stratified-charge H2/methanol dual-injection automobile engine under lean-burn condition

Author

Listed:
  • Gong, Changming
  • Li, Dong
  • Liu, Jiajun
  • Liu, Fenghua

Abstract

Influences of ignition timing (IT) on combustion, carbon monoxide (CO) and nitric oxide (NO) regulated emissions and formaldehyde (HCHO) and unburned methanol (CH3OH) unregulated emissions in a hydrogen (H2)/methanol dual-injection automobile engine under lean-burn condition were studied numerically. The results demonstrate that at lean-burn (excess air ratio = 2.0) condition, the peak cylinder pressure (PCP), peak heat release rate (PHRR) and peak cylinder temperature (PCT) all decrease with delayed IT, and their corresponding crank angles are also late; ignition delay (ID) and combustion duration (CD) decrease with delayed IT; CO, HCHO and CH3OH emissions increase with delayed IT, while NO emission decreases with delayed IT. At a fixed IT, PCP, PHRR and PCT for with adding 5 % H2 (RH2 = 5 %) are higher than those for without adding H2 (RH2 = 0 %), and their corresponding crank angles for RH2 = 5 % are earlier than those for RH2 = 0 %; ID and CD for RH2 = 5 % are lower than those for RH2 = 0 %. CO, HCHO and unburned CH3OH emissions for RH2 = 5 % are also much lower than those for RH2 = 0 %, while NO emission for RH2 = 5 % is also higher than that for RH2 = 0 %. The influence order of adding H2 to reduce emissions of engine is: CO > HCHO > unburned CH3OH.

Suggested Citation

  • Gong, Changming & Li, Dong & Liu, Jiajun & Liu, Fenghua, 2024. "Numerical evaluation of ignition timing influences on performance of a stratified-charge H2/methanol dual-injection automobile engine under lean-burn condition," Energy, Elsevier, vol. 290(C).
    • Handle: RePEc:eee:energy:v:290:y:2024:i:c:s0360544223036034
    DOI: 10.1016/j.energy.2023.130209
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    References listed on IDEAS

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