ISSN1006-7167CN31-1707/TRESEARCHANDEXPLORATIONINLABORATORY第42卷第2期Vol.42No.22023年2月Feb.2023DOI:10.19927/j.cnki.syyt.2023.02.020基于LII技术的发动机缸内碳烟测量平台设计张玉林,苏岩,李小平,解方喜,姜北平(吉林大学汽车底盘集成与仿生全国重点实验室,汽车工程学院,长春130022)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,45.5mg/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10mm2个测量平面,缸内碳烟分别在32°CAATDC和42°CAATDC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。关键词:碳烟;激光诱导炽光法;层流扩散火焰;汽油直喷发动机中图分类号:TK39;TK41文献标志码:A文章编号:1006-7167(2023)02-0092-06DevelopmentofSootMeasurementPlatforminEngineCylinderBasedonLIITechnologyZHANGYulin,SUYan,LIXiaoping,XIEFangxi,JIANGBeiping(NationalKeyLaboratoryofAutomotiveChassisIntegrationandBionics;CollegeofAutomotiveEngineering,JilinUniversity,Changchun130022,China)Abstract:AquantitativesootmeasurementsystemcombiningLIIandtwo-colormethodwasestablished,andtheaccuracyoftheLIImeasurementsystemwasverifiedbyalaminardiffusionflametestplatform.Thein-cylindersootvolumefractiondistributionwasmeasuredonanopticalenginewithdifferentcyclicinjectionvolumes,andthegenerationanddevelopmentprocessofin-cylindersootingasolinedirectinjection(GDI)engineswereinvestigated.Theresultsshowthatthemostsootismeasuredat45.5mg/conthesamemeasurementplane,andthesootismainlyconcentratednearthetopsurfaceofthepistonandneartheinjectorside.Forthetwomeasurementplanesof5mmand10mm,thein-cylindersootreachesthemaximumvalueat32°CAATDCand42°CAATDC,respectively,andthengraduallydecreasesduetotheeffectofoxidation.TheLIIin-cylindersootmeasurementsystemcanrealizethequantitativemeasuremen...