加载减速法分析柴油车NO_(x)与烟度净化效果  

An Analysis of NO_(x) and Smoke Purification Effect for Diesel Vehicles Based on Lugdown Cycle

作　　者：彭美春[1] 叶伟斌 邹康聪 李君平 黄文伟[2] Peng Mei-chun;Ye Wei-bin;Zou Kang-cong;Li Jun-ping;Huang Wen-wei(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China;School of Automotive and Transportation Engineering,Shenzhen Polytechnic,Shenzhen 518055,China)

机构地区：[1]广东工业大学机电工程学院,广东广州510006 [2]深圳职业技术学院汽车与交通学院,广东深圳518055

出　　处：《广东工业大学学报》2022年第2期84-90,共7页Journal of Guangdong University of Technology

基　　金：深圳市环境科研课题资助项目(2019XY1368STZF)。

摘　　要：研究简易工况加载减速法判别选择性催化还原系统(Selective Catalyst Reduction,SCR)、废气再循环(Exhaust Gas Recirculation,EGR)、颗粒捕集器(Diesel Particulate Filter,DPF)、氧化催化器(Diesel O_(x)idation Catalyst,DOC)净化柴油车的氮氧化物(NO_(x))与烟度排放的效果。对116辆次匹配上述净化技术的国V、国VI重型柴油货车进行加载减速排放检测,比较NO_(x)、烟度排放值,评价净化技术的净化效果,分析最大的轮边功率对应的转鼓线速度点(100%Actual Velocity of Maximum Wheel Power,100%VelHPMax)、最大的轮边功率对应的转鼓线速度80%点(80%VelHPMax)两种测试工况下排放的差异。发现EGR与SCR集成技术对NO_(x)的净化效果明显优于单一SCR或EGR技术,SCR技术优于EGR技术。配置EGR与SCR集成技术、单SCR技术车辆在100%VelHPMax工况下NO_(x)体积分数高于80%VelHPMax工况,单EGR技术则相反。配置DOC与DPF集成技术的柴油车辆烟度排放显著低于单DOC技术的车辆。测试的柴油车辆排气烟度光吸收系数,100%VelHPMax工况下均高于80%VelHPMax工况。结果表明,加载减速法能有效分辨净化技术对柴油车排放净化效果的差异。The purification effect of selective catalyst reduction(SCR),exhaust gas recirculation(EGR),diesel particulate filter(DPF)and diesel oxidation catalyst(DOC)on nitrogen oxide(NO_(x))and smoke of diesel vehicles was studied by short cycle lugdown.It was performed lugdown emission test of NO_(x) and smoke opacity for 116 heavy-duty diesel trucks in line with China V and China VI emission standards,equipped with the above exhaust purification technologies.It was compared the emission data of vehicles,the purification effect of the purification technology evaluated,the difference of emissionsbetween100%VelHPMax and 80%VelHPMax test condition analyzed.It is found that the purification effect of EGR and SCR integrated technology on NO_(x) is obviously better than single technology SCR or EGR,and the SCR is better than EGR.For vehicles equipped with EGR and SCR integrated technology and single technology SCR,the NO_(x) volume concentration is higher at 100%VelHPMax than 80%VelHPMax,while with single technology EGR is opposite.The smoke opacity value of diesel vehicles equipped with DOC and DPF integrated technology is significantly lower than single technology DOC.The smoke optical absorption coefficient of diesel vehicles inspected is higher at 100%VelHPMax than 80%VelHPMax.The results show that lugdown cycle test can distinguish effective the difference of purification effect of emission purification technologies of diesel vehicles.

关 键 词：柴油车 氮氧化物 烟度 排气净化技术 加载减速法 

分 类 号：U467.12[机械工程—车辆工程]