预喷对2-甲基呋喃/柴油混合燃料低温燃烧及排放的影响  

Effects of Pilot Injection on Combustion and Emissions Characteristics of Mixed Fuel with 2-Methylfuran and Diesel at Low Temperature

作　　者：肖合林[1,2] 杨小龙 薛琪 曾鹏飞 侯贝贝[1,2] XIAO Helin;YANG Xiaolong;XUE Qi;ZENG Pengfei;HOU Beibei(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan 430070,China)

机构地区：[1]现代汽车零部件技术湖北省重点实验室,武汉430070 [2]汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《武汉理工大学学报（交通科学与工程版）》2018年第3期363-367,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目资助(21377101)

摘　　要：研究了2-甲基呋喃(MF)与柴油混合燃料在一台改装过的四缸四冲程水冷增压直喷高压共轨柴油机上低温燃烧时的燃烧和排放特性.结果表明,燃用柴油中掺混MF可以升高缸内压力峰值和燃烧放热率峰值,降低HC以及CO的排放,但NOx排放有所升高;随着MF质量分数的增大,核模态粒子的数目有所升高,聚集态粒子的数目有所降低.相比单次喷射,引入预喷策略后,缸内压力峰值升高,放热率峰值下降.较小的预喷射提前角有利于降低HC,CO及NOx排放.随着预喷射角度的增大,核模态粒子的数目有所升高,聚集模态粒子的数目有所下降.Effects of 2-methylfuran（MF）addition on combustion and emissions were investigated on a modified four-cycle,4-storke,water-cooled,DICI engine coupled with a common rail fuel injection system.The results show that the cylinder pressure and heat release rate increase in peak and the emissions of CO and HC are decreased while the emission of NOxincreased when the diesel is blended with MF.With the increase of mass fraction MF,the number of nuclear modal particles has increased and the number of accumulative particles has decreased.Compared to the single injection,pre-injection can raise the peak of cylinder pressure and reduce the peak of heat release rate effectively.The smaller pre-injection angle is benefited to the reduction of HC,CO and NOxemissions.As the pilot injection timing is advanced,the PM number in nucleation mode is increased while the PM mass in accumulation mode is reduced.

关 键 词：预喷射 2-甲基呋喃(MF) 燃烧 排放 核模态 

分 类 号：U262.11[机械工程—车辆工程]