【摘要】 针对增压中冷柴油机构建了燃烧模型,并进行燃烧机理分析,研究了EGR率对降低柴油机NOx排放的影响,模拟计算与试验结果较好吻合,表明在进气量一定的前提下,添加EGR可降低NOx排放;在低扭矩下使用较高的EGR对燃烧影响较小;在高扭矩下应使用较小的EGR率。更多还原

【Abstract】 A combustion model of supercharged-inter cooled diesel engine was build up and its combustion mechanism was analyzed.The effect of EGR on reducing NOx emission is studied.Simulation calculation tallied well with the experiments results.It can be concluded that when the air intake flow is specific,the use of EGR can reduce NOx emission.Under the condition of small torque,a relatively higher EGR rate doesn’t have a big influence on combustion.However,when the torque is large,it’s better to use lower EGR rate.更多还原