张全长,冯斌,陈贵升,等.国六新型催化型柴油机微粒捕集器低温被动再生特性研究[J].内燃机工程,2022,43(6):69-77.
国六新型催化型柴油机微粒捕集器低温被动再生特性研究
Research on Low-Temperature Passive Regeneration Characteristics of New Type National Ⅵ Catalytic Diesel Particulate Filter
DOI：10.13949/j.cnki.nrjgc.2022.06.009
关键词:柴油机  柴油机氧化催化器  催化型柴油机颗粒物捕集器  被动再生
Key Words:diesel engine  diesel oxidation catalyst（DOC）  catalytic diesel particulate filter（CDPF）  passive regeneration
基金项目:国家自然科学基金项目（51866004）
作者单位E-mail
张全长* 湖南大学 先进动力总成技术研究中心，长沙 410082 bmd_2007@163.com 
冯斌 湖南大学 先进动力总成技术研究中心，长沙 410082  
陈贵升* 昆明理工大学 云南省内燃机重点实验室，昆明 650500 cgs_yly@163.com 
陈家洪 昆明理工大学 云南省内燃机重点实验室，昆明 650500  
李青 昆明理工大学 云南省内燃机重点实验室，昆明 650500  
彭益源 云内动力股份有限公司，昆明 650501  
摘要点击次数: 813
全文下载次数: 585
摘要:基于自行搭建的柴油机氧化催化器（diesel oxidation catalyst， DOC）+催化型柴油机微粒捕集器（catalytic diesel particulate filter， CDPF）的试验台架，开展了碳化硅（SiC）及堇青石CDPF被动再生平衡点温度试验，并测试了DOC新鲜件及老化件对载体被动再生平衡点温度的影响，对两种材料CDPF进行了低温条件下的被动再生特性试验。试验结果表明：炭载量5 g/L时，SiC CDPF被动再生平衡点温度约为295 ℃，堇青石CDPF约为310 ℃；DOC老化件对SiC CDPF被动再生平衡点温度无明显影响，但会导致其被动再生效率降低；未加装DOC时，SiC CDPF被动再生平衡点温度上升至355 ℃，且会导致载体内部温度轴向及径向上产生较大温差，大大降低其再生效率（仅为5%）；炭载量5 g/L、入口温度325 ℃时，SiC CDPF被动再生效率仅为48.9%，再生速率为2.9 g/h，而堇青石CDPF被动再生效率为75.2%，再生速率为11.5 g/h，后者在该温度附近被动再生特性更优。
Abstract:Based on the self-built test rig of an engine with diesel oxidation catalyst（DOC）+catalytic diesel particulate filter（CDPF）， the passive regeneration equilibrium point temperature tests of SiC and cordierite CDPF were conducted. The effects of DOC fresh and aged parts on the carrier’s passive regeneration equilibrium point temperature were tested. And the passive regeneration characteristics of CDPF of both materials under low-temperature conditions were tested. The test results show that the passive regeneration equilibrium point temperature of SiC CDPF is about 295 ℃ and that of cordierite CDPF is about 310 ℃ when the carbon loading amount is 5 g/L. The aging parts of DOC have no pronounced effect on the passive regeneration equilibrium point temperature of SiC CDPF， but it will lead to the decrease of its passive regeneration efficiency. When no DOC is added， the passive regeneration equilibrium point temperature of SiC CDPF rises to 355 ℃ and it will cause a significant temperature difference between the internal temperature of the carrier axially and radially， which significantly reduces its regeneration efficiency （only 5%）. When the carbon loading amount is 5 g/L and the inlet temperature is 325 ℃， the passive regeneration efficiency of SiC CDPF is only 48.9% and the regeneration rate is 2.9 g/h. The regeneration rate of cordierite CDPF is 75.2% and 11.5 g/h， and the latter has better passive regeneration characteristics near this temperature.
查看全文  HTML   查看/发表评论