现代柴油机燃烧过程中微粒质量的变化规律  

Mass Histories of In-Cylinder Particulates in Modern Diesel Engine

作　　者：魏国东[1] 杨铁皂[1] 董素荣[2] 宋崇林[2] 张宾[2] 裴毅强[2] 

机构地区：[1]河南科技大学车辆与动力工程学院,洛阳471003 [2]天津大学内燃机燃烧学国家重点实验室

出　　处：《燃烧科学与技术》2007年第4期360-364,共5页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2002CB21603);国家自然科学基金资助项目(50576067)

摘　　要：利用全气缸取样技术，对不同工况下的柴油机燃烧过程中微粒组分质量生成历程进行了研究．实验结果表明，燃烧形成的干碳烟质量曲线呈单峰状，峰值出现在上止点后10～15°CA之间，在燃烧后期，约有81％～92％的干碳烟被氧化．随着燃空当量比从φ=0．41增大到φ=0．53，缸内干碳烟质量峰值增加了4．57％～45．42％；喷油压力升高，虽然干碳烟质量峰值增大，但氧化比例也明显提高．此外，在燃烧初期，微粒中可溶有机物SOF的含量超过80％．Using a total cylinder sampling system, the mass formation histories of in-cylinder particulates under different diesel engine operating conditions were investigated. The experimental results indicated that the mass concentration of dry soot （DS） was of unimodal distribution, and that the peak point appeared at 10-15 °CA ATDC. About 81%-92% of the DS was oxidizedin the late combustion phase. With the fuel-air equivalence ratio rising from φ = 0.41 to φ = 0.53, the peak of mass concentration of incylinder DS increased by 4.57%-45.42%. Much more formation and oxidation of DS occurred at high fuel injection pressure than that at low fuel injection pressure. In addition, at the beginning of combustion, the soluble organic fraction （SOF） of particulates was up to 80 %.

关 键 词：现代柴油机 缸内微粒 干碳烟 可溶性有机物 形成历程 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]