摘要
为使某型柴油机排放达到国-Ⅳ的需求,进行了电控单体泵柴油机供油系统仿真匹配分析及供油凸轮型线、单体泵柱塞直径和喷孔直径对发动机排放特性影响的试验研究。仿真分析和试验结果表明:供油系统采用优化降速凸轮型线能够提高平均喷油压力并缩短喷油持续期,从而有效提升供油系统性能;同时匹配11mm柱塞直径单体泵及0.21mm喷孔直径喷油器后,发动机的排放性能得到了明显改善,使发动机标定工况颗粒排放降低80%以上,实现了该型发动机的排放改进目标。
In a DI diesel engine equipped with electronic unit pump （EUP）, simulation analysis and ex perimental investigation were conducted to examine influences of cam profile, diameters of plunger and nozzle hole on engine emission characteristics. Results show that obvious improvement in original engine emissions are obtained by adopting optimized combination of optimized decelerating cam profile with plunger diameter of 11 mm and nozzle hole diameter of 0.21 mm, particulate emission decreases by over 80%, satisfying China IV emission regulation , and realizing the expected objective.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2014年第6期42-46,53,共6页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
柴油机
电控单体泵
排放特性
供油系统
IC engine
diesel engine
electronic unit pump（EUP）
emission characteristics
fuel injection system
