农业机械学报2017，Vol.48Issue(6)：349-355,7.DOI:10.6041/j.issn.1000-1298.2017.06.046
柴油机微粒捕集器碳载量估计与分布特性研究
Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter
摘要
Abstract
A particulate matter estimation model was established to calculate the particulate retained in diesel particulate filter with consideration of catalytic reaction in filter.The filtration and catalytic regeneration parameters were identified by engine dynamometer test data,including permeability of carrier and activation energy and pre-exponential factors of the NO2 catalytic reaction and thermal catalytic reaction.The estimation model was validated under different operation conditions and model error was less than 10％.Analysis based on the catalytic reaction sub-model approved that the weight of catalytic regeneration was increased with the rise of temperature.At 442℃,percentage of regeneration mass in all engine emission was risen to 45.42％.The regeneration during filtration can effectively prolong the active regeneration cycle.After thorough analysis of the model,most of the particulate mass was distributed in cake layer,accounting more than 98％.The particulate mass in deep bed was discrete in five slabs and mass distribution in deep bed was mainly in the first slab.Under different test conditions,the mass in the first slab accounted more than 85％.And the permeability of the first slab was less than half of those of the other slabs.At 272℃,the particulate mass in different slabs remained stable quickly and the second to the fifth slabs were decreased more than 35％ at 442℃.Chemical catalytic reaction at high temperature was the reason for decreasing.For the first slab,cake layer can effectively replenish the regeneration mass.After the theoretical analysis and practical verify,the estimation model included NO2 catalytic reaction and thermal catalytic reaction can effectively predict the retained particulate mass in filter.关键词
柴油机/微粒捕集器/加载量/温度/再生/估计Key words
diesel engine/particulate filter/loading capacity/temperature/regeneration/estimation分类
能源科技引用本文复制引用
刘洪岐,高莹,姜鸿澎,陈金军,裴卡斯,郑德源..柴油机微粒捕集器碳载量估计与分布特性研究[J].农业机械学报,2017,48(6):349-355,7.基金项目
“十二五”国家科技支撑计划项目(2014BAG11B00) （2014BAG11B00）
