中文摘要：

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NO，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．

英文摘要：

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.