柴油机颗粒捕集器再生时机的研究  

A Study on the Right Moment for the Regeneration of Diesel Particulate Filter

作　　者：姜大海[1,2] 宁智[1] 姚广涛[2] 资新运[2] 何锦勇[2] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044 [2]军事交通学院汽车工程系,天津300161

出　　处：《汽车工程》2012年第2期109-115,共7页Automotive Engineering

基　　金：国家高技术研究发展计划项目(2009AA64801);国家自然科学基金项目(50676107);天津市自然基金项目(08JCYBJC13600)资助

摘　　要：提出了确定柴油机颗粒捕集器再生时机的主要原则,同时比较了不同的再生时机判断方法的特点,对过滤体的压力损失进行了数值模拟和试验研究。基于过滤体压力损失模型,根据排气流量、温度和背压计算颗粒沉积量,提出了新的再生时机判断方法。研究表明,在不考虑具体再生控制策略的前提下,堇青石过滤体的累积颗粒物的限值为4g/L,而SiC过滤体为8g/L。The main principles to determine the right moment for the regeneration of diesel particulate filter（DPF） is proposed,the features of different judgment methods on regeneration schedule are compared,and the numerical simulation and experimental study on the pressure drop of filter are carried out.Then a new judgment scheme on regeneration schedule is proposed,in which the right time for DPF regeneration is determined by calculating particulate matters deposition according to the flow rate,temperature and back pressure of exhaust gas,based on the pressure drop model for filter.The results of study show that the soot mass limit is 4g/L for cordierite filters and 8g/L for SiC filters,without considering the specific regeneration control strategy.

关 键 词：柴油机 颗粒捕集器 压力损失 再生时机 

分 类 号：U464.172[机械工程—车辆工程]