发动机工况与行驶挡位对轻型汽油车道路排放的影响  

INFLUENCE OF ENGINE OPERATING CONDITION AND DRIVING GEAR ON ROAD EMISSION OF LIGHT-DUTY GASOLINE VEHICLE

作　　者：李加强[1,2] 葛蕴珊 何超[2] 马志磊 陈剑杰 刘明 LI J1a-qlang;GE Yun-shan;HE Chao;MA Zhi-lei;CHEN Jlan-jle;LIU Ming(School of Mechanical Engineering,Beijing Institute of Technolo.gy,Beijing 100081,China;School of Vel/icle and transportation,Southwest Forestry University,Kunming 550224,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]西南林业大学汽车与交通学院,昆明650224

出　　处：《环境工程》2018年第12期130-134,154,共6页Environmental Engineering

基　　金：云南省科技计划项目(2017FD108);国家自然科学基金(51266015);云南省农业联合专项重点项目(2017FG001(-010))

摘　　要：使用便携式排放测试系统(PEMS)在一辆状态良好的轻型汽油轿车上进行实际道路排放试验,研究发动机不同转速、负荷工况与行驶挡位对排放的影响。结果表明:NO_x、CO、CO_2排放速率随着发动机转速与负荷的升高有增加的趋势。市区工况中,NO_x、CO、CO_2排放因子随着行驶挡位的升高有下降的趋势。全工况中以最高挡行驶时,发动机在中、高转速与大负荷、最大负荷条件下运行的比例上升,NO_x、CO排放速率与排放因子有增加的趋势。:In this study,a portable emission measurement system (PEMS)was used to carry out actual road emissions tests in a well-conditioned light-duty gasoline vehicle,so as to study the effects of engine speed,load condition and driving gear on emission.The results show that the emission rates of NOx,CO and CO2 tend to increase with the increasing of engine speed and load.In urban conditions,the emission factors of NOx ,CO and CO2 tend to decrease with the increasing of the driving gear. When driving in the top gear in overall working conditions,the proportion of the engine running at medium and high speeds with heavy load and maximum load will increase,due to which the emission rates and emission factors of NOx,CO tend to increase.

关 键 词：汽油车 挡位 发动机工况 PEMS 排放 

分 类 号：X734.2[环境科学与工程—环境工程]