基于简易瞬态工况法的在用汽油车排放特性试验研究  

Emission Characteristics of In-Use Gasoline Vehicle Based on Short Transient Driving Cycle

作　　者：高冬冬 罗马吉[1] 刘成[1] GAO Dongdong;LUO Maji;LIU Cheng(Hubei Provincial Key Laboratory of Modern Auto Parts Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070

出　　处：《车用发动机》2021年第1期87-92,共6页Vehicle Engine

摘　　要：以2009年捷达车1.6 L自然吸气汽油机为研究对象,搭建汽车尾气测试转鼓试验台架,安装自主研发的EGR系统和市售的三元催化器控制装置,结合GB 18285—2018《汽油车污染物排放限值及测量方法(双怠速法及简易工况法)》中简易瞬态工况法进行排放试验,综合评价了以上排放控制技术对在用轻型汽油车排放特性的影响。结果表明:发动机引入EGR气体后,NO x排放明显下降,随着EGR阀开度不断增大,NO x排放下降幅度也逐渐增加,CO和HC排放呈现先降低后升高趋势;更换三元催化器后,有害排放污染物中CO、HC和NO x明显降低,CO排放近乎零排放,催化转化效果极其明显;三元催化器结合EGR系统后,有害污染物排放均有所降低,在EGR阀开度2%~10%范围内,随着EGR阀开度增大,NO x排放明显减低,CO和HC排放略有上升的负面效果因三元催化器净化而抵消。Taking the 2009 Jetta 1.6 L naturally aspirated gasoline engine as the research object,a rotating drum test bench for automobile exhaust gas testing was set up,and the self-developed EGR system and commercially available three-way catalysts were configured.The emission experiments were conducted according to the short transient driving cycle in the legislation of GB 18285-2018 named"Limits and Measurement Methods for Emissions from Gasoline Vehicles under Two-Speed Idle Conditions and Short Driving Mode Conditions".The effects of above-mentioned emission control technologies on emission characteristics of light-duty gasoline vehicle were comprehensively evaluated.The results show that the NO x emission reduces significantly after the introduction of EGR.The NO x emission reduces gradually and the CO and HC emissions decrease first and then increase with the increase of EGR valve opening.The CO,HC and NO x emissions reduce significantly and the CO emission is near to 0 after the using of new three-way catalyst.The combination of three-way catalyst and EGR system also promotes the reduction of harmful pollutant emissions.In the range of 2%-10%EGR valve opening,the NO x emission reduces significantly and the negative effects of slightly increasing of CO and HC emissions are counteracted due to the purification of three-way catalyst with the increase of EGR valve opening.

关 键 词：汽油车 简易瞬态工况法 废气再循环 催化转化器 排放特性 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]