基于LII法醇类燃料GDI发动机的碳烟生成机制  

Soot Formation Mechanism of Alcohol Fuel GDI Engine Based on LII Method

作　　者：张玉林 苏岩[1,2] 解方喜[1,2] 杨鹤[3] 王俊[3] 田华宇 Zhang Yulin;Su Yan;Xie Fangxi;Yang He;Wang Jun;Tian Huayu(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China;College of Automotive Engineering,Jilin University,Changchun 130022,China;Sinopec Research Institute of Petroleum Processing,Beijing 100083,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,吉林长春130022 [2]吉林大学汽车工程学院,吉林长春130022 [3]中国石油化工股份有限公司石油化工科学研究院,北京100083

出　　处：《内燃机学报》2023年第6期498-506,共9页Transactions of Csice

基　　金：国家能源石油炼制技术研发(实验)中心开放基金资助项目(33600000-22-ZC0607-0003)。

摘　　要：为研究醇类燃料对汽油直喷(GDI)发动机缸内燃烧过程中碳烟生成的影响,应用双色激光诱导炽光(TCLII)法,通过一台单缸GDI光学发动机,对燃用甲醇混合燃料(M20)和乙醇混合燃料(E20)的缸内碳烟分布进行了二维定量测量.结果表明:与燃用纯异辛烷(I100)相比,M20和E20的缸内压力峰值和放热率峰值均有所增加,对应的曲轴转角提前.对于LII测量,M20与E20对缸内碳烟生成的影响呈相反的趋势;E20的最高碳烟体积分数略高于I100,M20的碳烟体积分数是3种测试燃料中最低的,显著低于E20和I100;在测量平面上,I100的碳烟分布不均匀,在靠近进气门的一侧碳烟较多,M20和E20的碳烟分布相对比较均匀.根据排气微粒测量结果,M20和E20的微粒总数量浓度均显著减少.In order to investigate the effect of alcohol fuels on soot formation during in-cylinder combustion in gasoline direct injection(GDI)engines,two-dimensional quantitative measurements of in-cylinder soot distribution were performed by applying the two-color laser induced incandescence(TC-LII)method on a single-cylinder GDI optical engine burning methanol-blended fuel(M20)and ethanol-blended fuel(E20)respectively.The results show that,the peak of in-cylinder pressure and the heat release rate increase for both M20 and E20 and the phase of them advances compared to pure isooctane(I100).From LII measurements,different inclinations for soot forma-tion were observed with the two alcohol blends.E20 shows a slightly higher maximum soot volume fraction than I100,and M20 has the lowest soot volume fraction of the three tested fuels,significantly less than E20 and I100.The soot distribution of I100 is uneven on the measurement plane,and there is more soot on the top side close to the intake valves,while the soot distribution of M20 and E20 is relatively uniform.From the exhaust particle measurements,significant reductions were found in total particle number and accumulation mode particle number for both M20 and E20.

关 键 词：汽油直喷发动机 双色激光诱导炽光法 醇类 碳烟 

分 类 号：TK417.1[动力工程及工程热物理—动力机械及工程]