摘要
设计并建立了LII技术结合双色法的碳烟定量测量系统,通过层流扩散火焰测试平台验证了LII测量系统的准确性。在光学发动机上应用该技术测量了不同循环喷油量下缸内碳烟体积分数分布,并研究了汽油直喷(GDI)发动机缸内碳烟的生成及发展历程。结果表明,45.5 mg/c工况下所测得的碳烟最多,并且碳烟主要集中在活塞顶面附近且靠近喷油器一侧。对于5和10 mm 2个测量平面,缸内碳烟分别在32℃A ATDC和42℃A ATDC时刻达到最大值,之后由于氧化作用而逐渐减少。该LII缸内碳烟测量系统可以实现发动机燃烧过程中缸内碳烟分布的定量测量,为控制发动机微粒排放提供技术支持。
A quantitative soot measurement system combining LII and two-color method was established,and the accuracy of the LII measurement system was verified by a laminar diffusion flame test platform.The in-cylinder soot volume fraction distribution was measured on an optical engine with different cyclic injection volumes,and the generation and development process of in-cylinder soot in gasoline direct injection(GDI)engines were investigated.The results show that the most soot is measured at 45.5 mg/c on the same measurement plane,and the soot is mainly concentrated near the top surface of the piston and near the injector side.For the two measurement planes of 5 mm and 10 mm,the in-cylinder soot reaches the maximum value at 32℃A ATDC and 42℃A ATDC,respectively,and then gradually decreases due to the effect of oxidation.The LII in-cylinder soot measurement system can realize the quantitative measurement of in-cylinder soot distribution during engine combustion,which canprovide the theoretical basis and direction in realizing engine particulate emission control.
作者
张玉林
苏岩
李小平
解方喜
姜北平
ZHANG Yulin;SU Yan;LI Xiaoping;XIE Fangxi;JIANG Beiping(National Key Laboratory of Automotive Chassis Integration and Bionics,College of Automotive Engineering,Jilin University,Changchun 130022,China)
出处
《实验室研究与探索》
CAS
北大核心
2023年第2期92-97,共6页
Research and Exploration In Laboratory
基金
吉林省教育厅项目(JJKH20221002KJ)
吉林大学本科教学改革研究项目(2021XYB091)
吉林大学实验技术项目(SYXM2021b018)
汽车仿真与控制国家重点实验室自由探索项目(ascl-zytsxm-202014)。
关键词
碳烟
激光诱导炽光法
层流扩散火焰
汽油直喷发动机
soot
laser induced incandescence(LII)
laminar diffusion flame
gasoline direct injection(GDI)engine
