内燃机工程2025，Vol.46Issue(2)：44-51,8.DOI:10.13949/j.cnki.nrjgc.2025.02.006
预燃室湍流射流点火增压直喷发动机稀薄燃烧试验研究
Experimental Study on Lean Combustion of Pre-Chamber Turbulent Jet Ignition Gasoline Direct Injection Engine
摘要
Abstract
Based on high-compression-ratio four-cylinder turbo-charged gasoline-direct-injection(GDI)engine and pre-chamber turbulent jet ignition(TJI)system,experimental study of lean combustion characteristics under low and medium loads was carried out.The results show that the combustion stability of TJI has obvious load boundary.Under light load of indicated mean effective pressure(IMEP)0.4 MPa the cylinder pressure and peak transient heat release rate of TJI decrease significantly and the ignition delay is long compared with conventional spark ignition(SI).The coefficient of variation(COV)is deteriorated to 5%at IMEP 0.7 MPa.The combustion boundary and indicated fuel consumption and emission of TJI is close to SI at IMEP 1.1 MPa.With increasing of load during light and medium load,the ignition delay is shortened,50%mass fraction burn crank angle(CA50)is moving forward,the combustion stability is improved,and emissions of total hydrocarbon(THC)and CO are reduced.For TJI application,high-energy ignition is benefit for shortening the ignition delay period,accelerating combustion process,and improving the combustion stability and emission performance.关键词
预燃室/湍流射流点火/高能点火/稀燃/热效率Key words
pre-chamber/turbulent jet ignition/high-energy ignition/lean combustion/thermal efficiency分类
能源与动力引用本文复制引用
赵校伟,孙跃东,张振东,尹丛勃,秦文瑾..预燃室湍流射流点火增压直喷发动机稀薄燃烧试验研究[J].内燃机工程,2025,46(2):44-51,8.基金项目
上海市科技计划项目(21010503000) Shanghai Science and Technology Plan Project(21010503000) （21010503000）
