缸内喷射CO_2对柴油机均质压燃影响的初步研究  

Effects of CO_2 In-Cylinder Injection on Diesel Homogeneous Charge Compression Ignition Combustion-Preliminary Study

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：《内燃机学报》2007年第6期488-492,共5页Transactions of Csice

基　　金：国家重点基础研究发展规划资助项目(2007CB210003);国家自然科学基金项目(50406016)

摘　　要：采用气体喷射系统向气缸内喷射CO2,研究了CO2喷射始点和循环喷射量对均质压燃(HCCI)柴油机燃烧特性和排放特性的影响。试验结果表明:CO2缸内喷射可以有效控制燃烧始点和降低NOx排放。随着CO2喷射始点提前和循环喷射量增大,爆发压力和缸内温度降低,低温和高温放热始点推迟,压力升高率降低;NOx排放降低,碳烟、HC和CO排放升高。另外,燃烧相位的改善,减小了压缩负功,使指示热效率也比未喷射CO2时增大。Using a gas injection system to directly inject CO2 in cylinder,the effects of CO2 injection timings and quantities on diesel homogeneous charge compression ignition(HCCI) combustion and emissions were studied.The experimental results revealed that,in-cylinder injection of CO2 can control starts of combustion and effectively reduce NOx emission.Either advancing CO2 injection timing or increasing CO2 injection quantity can reduce the peak cylinder pressure and the cylinder temperature,postponing the starts o...

关 键 词：均质压燃 气体喷射系统 CO2 喷射始点 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]