微粒捕集器喷油助燃再生喷油与补气的优化控制  

Optimum control on fuel injection and air supply for burner-type diesel particulate filter regeneration

作　　者：伏军[1] 龚金科[2] 左青松[2] 袁文华[1] 唐维新[1] 唐宁[1] 

机构地区：[1]邵阳学院机械与能源工程系,邵阳422004 [2]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《农业工程学报》2012年第17期11-18,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：湖南省科技厅科研项目(2012SK3162);湖南省高校科技创新团队支持计划项目(小型风冷柴油机性能提高与优化);湖南省自然科学基金项目(09JJ6077);国家自然科学基金项目(50876027)

摘　　要：为实现柴油机微粒捕集器喷油助燃再生的优化控制,该文基于原喷油量优化控制模型,在考虑补气的前提下,结合过滤体再生入口临界温度模型对其边界终止温度条件的强化,对微粒捕集器再生过程烟气最优升温速度曲线予以了改进,并获得了喷油量/补气量的最优控制目标函数。从其在线优化控制结果来看,喷油量最优值随再生时间变化呈先减小后增加的趋势。相应补气量变化趋势与最佳喷油量的变化一致,受排气氧含量富余程度影响,对应的补气量在越过最低点后增长的速度不一致。试验结果表明,对喷油量/补气量予以最优控制后,整个再生过程油耗可降低34.6%～40.2%。为提高整个微粒捕集器喷油助燃再生过程的操作水平和经济效益提供了参考。In order to realize the optimum control of a burner-type diesel particulate filter（DPF） regeneration,based on the original optimum control model of fuel injection,with the boundary conditions of terminate temperature strengthened by the critical temperature model of inlet channel regeneration,the optimal temperature rising velocity curve of fume gas and the objective functions of optimum control about the fuel injection and air supply were obtained in consideration of the air supply.From the results of online optimization control,the optimal values of fuel injection quantity decreased first and then increased with regeneration time.The trend of corresponding air supply was consistent with that of the optimal fuel injection quantity,but affected by oxygen content in exhaust,the corresponding air supply quantity increased differently over the lowest point.The test results showed：the fuel consumption could be reduced by 34.6% to 40.2% by the optimal control.It provides references on improving the operation level and economic effectiveness in the regeneration process of burner-type diesel particulate filters.

关 键 词：柴油机 燃油 喷射 优化控制 微粒捕集器 再生 补气 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]