CO_2进气道和缸内喷射对柴油准HCCI燃烧的影响  

Effect of CO_2 Intake and Cylinder Injection on Diesel Quasi-Homogeneous Charge Compression Ignition Combustion

作　　者：曲栓[1] 邓康耀[1] 石磊[1] 崔毅[1] 

机构地区：[1]上海交通大学动力机械与工程教育部重点实验室,上海200240

出　　处：《燃烧科学与技术》2009年第2期177-181,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(2007CB210003);国家自然科学基金资助项目(50406016)

摘　　要：通过开发的气体喷射系统,研究并对比了进气道和缸内喷射CO2对准均质压燃燃烧排放的影响.准HCC I燃烧由两段喷油实现.结果表明:随着缸内和进气道CO2循环喷射量的增大,缸内最高平均温度降低,燃烧相位推迟,最大压力升高率变化不大;NOx排放减小,HC和CO排放增大.等CO2喷射量下,NOx随着缸内CO2喷射始点的提前而减小;缸内喷射的HC和CO排放较进气道喷射的大.随着CO2循环喷射量的增大,进气道喷射的烟度开始变化不大,然后急剧上升;而缸内喷射的烟度变化不大.By using a gas injection system, CO2 was injected into the intake pipe and cylinder, respectively, and its effect on quasi-homogeneous charge compression ignition （HCCI） with two-pulse diesel injection was studied. The results revealed that, as CO2 cyclic injection quantities of both in-cylinder and intake injection increased, maximum average cylinder temperature decreased, combustion timing was delayed, while peak cylinder pressure rise rate slightly changed; NOx emission decreased, while HC and CO emissions increased. With the same CO2 injection quantity, NOx decreased as CO2 injection timing advanced; HC and CO emissions of in-cylinder injection were greater than those of intake injection. As CO2 injection quantity increased, smoke of intake injection first changed little and then increased dramatically; In contrast, smoke of in-cylinder injection remained nearly unchanged.

关 键 词：准均质压燃 气体喷射系统 CO2 循环喷射量 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]