柴油机微粒捕集器再生中灰分沉积机理及影响研究  

A Research on the Mechanism and Influence of Ash Deposition in DPF Regeneration

作　　者：侯献军[1,2] 马义[1,2] 彭辅明[1,2] 颜伏伍[1,2] 

机构地区：[1]武汉理工大学汽车工程学院 [2]现代汽车零部件技术湖北省重点实验室,武汉430070

出　　处：《汽车工程》2012年第4期316-319,共4页Automotive Engineering

基　　金：深圳市政府采购项目-柴油车污染控制技术应用研究课题(SZCG2008011018)资助

摘　　要：利用GT-Power软件建立柴油机微粒捕集器再生仿真模型,并进行仿真,以分析再生中形成的灰分沉积对捕集器过滤效率和再生过程的影响。结果表明,灰分沉积不但会减小过滤体有效过滤面积,增大排气背压,从而降低载体的过滤性能;还会加剧微粒的燃烧,增大载体温度梯度。在再生平衡过程中,排气背压会缓慢上升,而再生平衡点温度会随着灰分沉积量的增加而下降。The regeneration simulation model for diesel particulate filter（DPF） is established by using software GT-Power,and a simulation is conducted to analyze the effects of ash deposition produced in regeneration on the efficiency of DPF and the process of regeneration.The results show that ash deposition can not only reduce the effective area of filter,increase exhaust back pressure,and hence lower the filtering performance of filter,but also intensify the combustion of particulate and increase the temperature gradient of filter.In the course when regeneration keeps balance,exhaust back pressure may rise slowly and the balance point temperature（BPT） goes down with the increase of ash deposition.

关 键 词：柴油机微粒捕集器 再生 灰分沉积 GT-POWER 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]