不同初馏点柴油对HCCI发动机燃烧和排放影响的试验  

Experiment on HCCI Engine Combustion and Emissions with Diesel of Various Initial Distillation Temperatures

作　　者：冯洪庆 郑尊清[2] 尧命发[2] 程刚 马帅营[2] 王鑫[2] 

机构地区：[1]中国石油大学热能与动力工程系,山东青岛266555 [2]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机学报》2013年第1期22-25,共4页Transactions of Csice

基　　金：国家自然科学基金资助项目(51106181;51176140);天津大学内燃机燃烧学国家重点实验室开放课题资助项目(K2012-06);山东省优秀中青年科学家科研奖励基金资助项目(BS2012NJ012)

摘　　要：在一台改装的6缸增压直喷式柴油机上进行了不同初馏点柴油均质压燃(HCCI)的试验.结果表明,在HCCI发动机上,随着初馏点的降低,运行范围有所下降,初馏点为125,℃和100,℃的燃料工况范围跟纯柴油相近,而滞燃期变长,有利于燃料的混合过程,但指示热效率会有所下降.在不降低运行范围的前提下,初馏点较低的燃油能很好地降低NOx排放,同时碳烟排放也有所降低,有利于满足排放法规的要求.拓宽燃油馏程为柴油机HCCI燃烧过程的优化提供新的途径.Experimental study was performed on combustion characteristics of HCCI engine in a modified six-cylinder turbocharged direct-injection diesel engine fueled with diesel of various initial distillation tem- peratures. Results show that HCCI operating range is narrowed with the decrease of initial boiling point. Operating range of fuels with initial distillation temperature of 125 ~C and 100 ~C are similar to that of pure diesel. Ignition delay increases with the lowering of initial boiling point which is beneficial to the improvement of mixing process with a penalty of decrease in indicated thermal efficiency. Without chang- ing engine operating range, diesel wide distillation range reduces NOx and PM emissions, and meets the emission regulations. Utilization of wide distillation range fuel is a new way to optimize HCCI combus- tion.

关 键 词：柴油 低温燃烧 初馏点 排放 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]