DPF不同累炭方式对比研究  

Comparative Study on Different Soot Accumulation Modes of DPF

作　　者：于津涛 邢博[2] 高鑫磊 YU Jintao;XING Bo;GAO Xinlei(Tianjin University,Tianjin 300072,China;China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]天津大学,天津300072 [2]中国汽车技术研究中心有限公司,天津300300

出　　处：《车用发动机》2023年第1期39-43,共5页Vehicle Engine

摘　　要：研究了柴油车用颗粒物捕集器(DPF)采用不同累炭方式进行加载时,累炭速率、积炭分布和颗粒物排放随工况和炭载量的变化规律。试验结果表明:对于累炭速率曲线较为平缓的工况,更适合通过控制时间长度来制备不同累炭比例的DPF,对于累炭速率不稳定的工况,不适宜制备低比例累炭量的DPF;DPF内部颗粒物的分布与工况呈现很强的相关性,相似的稳态工况下,无论是用发动机台架试验还是整车试验,DPF内部颗粒物分布规律相似;稳态和瞬态累炭工况下,颗粒物数量和质量排放均随着炭载量的增加出现先高后低的变化规律。The variation laws of soot accumulation rate,distribution and particulate matter emissions with working conditions and soot load were studied based on different soot accumulation modes of DPF.The test results show that the stable-relatively soot accumulation curve is fit to prepare the DPF of different soot accumulation rates by controlling the time.It is difficult to prepare DPF with a small amount of soot under the unstable soot accumulation rate conditions.The distribution of particulate matter in the DPF has a strong correlation with the working conditions.Whether for the engine bench test or vehicle test,the distribution of particulate matter is similar under similar steady state conditions.With the increase of soot load,the number and weight of PM firstly increase and then decrease under steady and transient working conditions of soot accumulation.

关 键 词：颗粒捕集器(DPF) 炭载量 加载工况 颗粒 排放 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]