Impact of coolant temperature on piston wall-wetting and smoke generation in a stratified-charge DISI engine operated on E30 fuel
Impact of coolant temperature on piston wall-wetting and smoke generation in a stratified-charge DISI engine operated on E30 fuel
复制标题
使用 E30 燃料运行的分层充气 DISI 发动机中冷却剂温度对活塞壁润湿和烟雾产生的影响
DOI:
10.1016/j.proci.2018.07.073
复制
发表时间:
2019
影响因子:
3.4
通讯作者:
Xiangrong Li
中科院分区:
文献类型:
--
作者:
Xu He;YanKai Li;Magnus Sjöberg;David Vuilleumier;Carl-Philipp Ding;Fushui Liu;Xiangrong Li
A late-injection strategy is typically adopted in stratified-charge direct injection spark ignition (DISI) engines to improve combustion stability for lean operation, but this may induce wall wetting on the piston surface and result in high soot emissions. E30 fuel, i.e.,gasoline with 30% ethanol, is a potential alternative fuel that can offer a high Research Octane Number. However, the relatively high ethanol content increases the heat of vaporization, potentially exacerbating wall-wetting issues in DISI engines. In this study, the Refractive Index Matching (RIM) technique is used to measure fuel wall films in the piston bowl. The RIM implementation uses a novel LED illumination, integrated in the piston assembly and providing side illumination of the piston-bowl window. This RIM diagnostics in combination with high-speed imaging was used to investigate the impact of coolant temperature on the characteristics of wall wetting and combustion in an optical DISI engine fueled with E30. The experiments reveal that the smoke emissions increase drastically from 0.068 FSN to 1.14 FSN when the coolant temperature is reduced from 90 °C to 45 °C. Consistent with this finding, natural flame luminosity imaging reveals elevated soot incandescence with a reduction of the coolant temperature, indicative of pool fires. The RIM diagnostics show that a lower coolant temperature also leads to increased fuel film thickness, area, and volume, explaining the onset of pool fires and smoke.
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影响因子:
3.8
作者:
S. Henkel;F. Beyrau;Y. Hardalupas;A. M. Taylor
通讯作者:
S. Henkel;F. Beyrau;Y. Hardalupas;A. M. Taylor
DOI:
10.4271/2001-01-1203
发表时间:
2001-03
期刊:
--
影响因子:
--
作者:
Eric J. Stevens;R. Steeper
通讯作者:
Eric J. Stevens;R. Steeper
DOI:
10.4271/2004-01-1900
发表时间:
2004-06
期刊:
SAE transactions
影响因子:
--
作者:
Magnus Sjöberg;J. Dec
通讯作者:
Magnus Sjöberg;J. Dec
DOI:
10.4271/2011-01-1215
发表时间:
2011-04
期刊:
--
影响因子:
--
作者:
D. Maligne;G. Bruneaux
通讯作者:
D. Maligne;G. Bruneaux
影响因子:
7.4
作者:
Ma, Xiao;Wang, Zhi;Wang, Jianxin
通讯作者:
Wang, Jianxin