喷油策略对双喷射系统汽油机燃烧排放的影响研究
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摘要
以一台装有双喷射系统的汽油机为对象进行实验,研究不同喷油策略时直喷比例RDI对汽油机燃烧和排放特性的影响。结果显示:直喷比例RDI=50%为分界点,当RDI小于50%时,缸压和瞬时放热率基本不变,CO排放增加而HC排放减少;当RDI大于50%时,缸压和瞬时放热率有显著降低,CO和HC排放趋势与上述相反;而NOX排放整体呈降低趋势。
The test on a gasoline engine equipped with dual-injection system is conducted to investigate the effect of direct-injection ratio RDIon the combustion and emission of that engine with stoichiometric mixture under different injection time. The results show that the release rate of pressure and heat in cylinder are almost kept unchanged when RDIis less than 50%,and they obviously fall when RDIis more than 50%. HC emission decreases first and then increases,and the trend of CO emission is just the opposite,while the trend of NOXemission is constantly lower.
The test on a gasoline engine equipped with dual-injection system is conducted to investigate the effect of direct-injection ratio RDIon the combustion and emission of that engine with stoichiometric mixture under different injection time. The results show that the release rate of pressure and heat in cylinder are almost kept unchanged when RDIis less than 50%,and they obviously fall when RDIis more than 50%. HC emission decreases first and then increases,and the trend of CO emission is just the opposite,while the trend of NOXemission is constantly lower.
引文
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[2]李岳林.交通运输环境污染与控制[M].北京:机械工业出版社,2010.
[3]蒋茂玎,张汉桥,马标,等.欧Ⅵ轻型汽油车排放法规发展及后处理应对技术[J].汽车实用技术,2017(14):197-199.
[4]武和全,姜水生,高国珍.汽油机缸内直喷的研究现状与发展[J].能源研究与管理,2005(3):9-11.
[5]黄琪涛.论汽油汽车国五排放控制技术发展状况[J].科技风,2017(13):122-123.
[6]李文熙,王猛猛.现代汽油机燃油喷射技术的发展及应用[J].林业机械与木工设备,2017,45(5):9-11.
[7]王建昕,王志.高效清洁车用汽油机燃烧的研究进展[J].汽车安全与节能学报,2010,1(3):167-178.
[8]逸锋.雷克萨斯新款进气道喷射与缸内直喷组合汽油机[J].汽车与配件,2008(9):46-49.
[9]IKOMA T,ABE S,SONODA Y,et al. Development of V-6 3. 5-liter engine adopting new direct injection system[C]//SAE 2006 World Congress&Exhibition,2006:43-48.
[10]王子玉,王雷,李云广,等.优化进气道改善高强化柴油机燃烧与性能的试验研究[J].现代车用动力,2018(2):30-33.
[11]刘辉,宋涛,王志,等.甲醇-汽油双燃料双喷射系统抑制爆震的试验研究[C]//中国内燃机学会燃烧净化节能分会2013年学术年会,2013.
[12]LIU H,WANG Z,WANG J. Methanol-gasoline DFSI(dual-fuel spark ignition)combustion with dual-injection for engine knock suppression[J]. Energy,2014,73(3):686-693.
[13] HUANG Y,HONG G,HUANG R. Investigation to charge cooling effect and combustion characteristics of ethanol direct injection in a gasoline port injection engine[J]. Applied Energy,2015,160:244-254.
[14]ZHUANG Y,HONG G. Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine[J]. Fuel,2014,135(11):27-37.
[15]ZHUANG Y,HONG G,et al. Primary investigation to leveraging effect of using ethanol fuel on reducing gasoline fuel consumption[J]. Fuel,2013,105(2):425-431.
[16]于秀敏,王野,李盛成,等.直喷比例对双喷射汽油机燃烧和排放影响的试验研究[J].汽车工程,2017,39(9):989-996.
[17]李兴虎.汽车环境污染与控制[M].北京:国防工业出版社,2011.
[18]韩永强,刘佳会,刘忠长,等.双阶段燃烧低温阶段HC及CO排放的优化路径[J].内燃机学报,2017(4):313-319.
[19]沈照杰,刘忠长,田径,等.高压共轨柴油机瞬变过程试验与模拟分析[J].内燃机学报,2013(5):407-413.