汽油-天然气双燃料汽车高原道路CO2排放特性研究  

CO2 Real Drive Emission Characteristics of CNG and Gasoline Dual Fuel Vehicle at Plateau

作　　者：马志磊 何超 刘明 邹浪 张荣柱 MA Zhilei;HE Chao;LIU Ming;ZOU Lang;ZHANG Rongzhu(School of Vehicle and Transportation,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学汽车与交通学院

出　　处：《车用发动机》2019年第6期71-77,共7页Vehicle Engine

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：为研究高原地区双燃料汽车分别燃用天然气和汽油时的温室气体CO2排放特性,参考实际行驶污染物排放试验(RDE)要求,在海拔为1110 m,1330 m,1960 m的3个城市分别使用天然气与汽油进行道路排放测试,并使用移动平均窗口法处理数据。结果表明:使用天然气在1100-2000 m的高原环境下行驶时,CO2排放因子与海拔呈较好的线性关系,海拔每上升100 m,CO2排放因子升高3.38 g/km,总行程CO2排放因子比使用汽油时平均降低20.33%。海拔较低时,发动机负荷随节气门打开提升更为迅速,随着海拔上升,负荷提升变缓。车速低于50 km/h时,随着车速升高使用挡位的传动比下降,单位行驶里程中的发动机工作循环次数减少,使CO2排放因子随车速升高迅速降低。车速高于50 km/h时,CO2排放因子主要随负荷升高而上升。In order to study the greenhouse gas CO2 emission characteristics of dual fuel vehicle fueled with CNG and gasoline at plateau,the road driving emission tests were conducted in three cities with altitudes of 1110 m,1330 m and 1960 m and emissions data were then processed by using the moving average window method according to the real driving emission(RDE)test requirements.The results show that the CO2 emission factor for CNG has a good linear relationship at the altitude of 1100 m to 2000 m,which increases by 3.38 g/km per 100 m and decreased by 20.33%on average compared with that of gasoline from the view of total distance.At low altitude,the response of load acceptance is faster with the throttle opening,but becomes slow with the increase of altitude.With the increase of vehicle speed within 50 km/h,the transmission ratio decreases and the number of engine work cycle per mileage decreases so that the CO2 emission factor decreases with the increase of vehicle speed.The CO2 emission factor increases mainly with the increase of load when the vehicle runs beyond 50 km/h.

关 键 词：双燃料发动机 便携式排放测试系统 二氧化碳 排放因子 移动平均窗口法 

分 类 号：TK411.5[动力工程及工程热物理—动力机械及工程]