摘要
基于复合进气道喷射与缸内直喷两套喷射系统的汽油机,使用进气道喷射(PFI)、缸内直喷(GDI)及复合喷射(PDI)方式,研究不同喷射模式对汽油机冷起动首循环及前10循环的燃烧以及颗粒物数量排放的影响.研究结果表明:复合喷射可大幅降低直喷发动机冷起动首循环颗粒物数量排放;基于离子电流缸内诊断技术可实现冷起动首循环失火诊断与补火控制,避免失火,失火循环补火再燃后的颗粒物数量排放与GDI模式冷起动基本相同,但可避免HC排放恶化.
A gasoline direct injection（GDI）engine was modified with a port fuel injection（PFI）system to achieve both injection modes simultaneously.The effects of different parameters on combustion and particulate number（PN）emissions of the first cycle were studied in detail in the cold start process.The results show that PN emissions of the first cycle can be mitigated by the combined fuel injection strategy.Misfire cycle can be avoided in the first cycle at cold start based on ion current signal diagnosis and feedback control.Therefore,for the survival combustion cycle from misfire,the deterioration of hydrocarbon emissions will not occur and simultaneously PN emissions are also at the same level of normal GDI engines.
作者
晁岳栋
陈歆叶
邓俊
龚元明
李理光
Chao Yuedong;Chen Xinye;Deng Jun;Gong Yuanming;Li Liguang(School of Automotive Studies,Tongji University,Shanghai 200092,China;School of Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Chinesisch-Deutsches Hochschulklog,Tongji University,Shanghai 200092,China)
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2018年第5期417-423,共7页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(51376139)
KSPG汽车发动机教席基金资助项目
