轻型电喷汽油车稳态工况的排放特性  

Emission characteristics of light duty electronic injection gasoline vehicle at steady running condition

作　　者：边浩毅[1] 祁东辉[1] 任学成[1] 宋宝珍[1] 

机构地区：[1]长安大学汽车学院

出　　处：《长安大学学报（自然科学版）》2007年第6期91-94,102,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：浙江省交通科技计划项目(2006T13)

摘　　要：为了研究电喷汽油车运行工况对排放物的影响规律,利用底盘测功机和定容取样方法,测试了稳态下各排放物的浓度,计算了排放因子,分析了车速、载荷和挡位对排放因子的影响。研究结果表明:CO、HC和NOx排放因子大体上随车速的升高而降低,但在高挡、高速时CO和NOx排放因子略有回升,HC排放因子变化不大,CO排放因子随载荷的增大略有升高,HC和NOx排放因子基本没有变化;排放因子随挡位的变化与车速有关,低速时采用低挡排放因子较低,但在高速时应采用高挡;不同运行工况下催化转化器的转化效率也是影响排放因子的因素之一。In order to study the influence of running conditions on emissions of electronic injection gasoline vehicle, the emission concentration under steady running condition was measured by constant volume sampling system on a roller chassis dynamometer. The emission factors and the influence of speed, load and shift on emission factors were calculated and analyzed. The results indicate that CO、 HC and NOx emission factors basically decrease with the increase of speed, but at higher speed and shift, CO and NOx emission factors increase, HC emission factors vary little; CO emission factors slightly increase with the increase of load, but HC and NO~ emission factors keep almost constant. The change of emission factors with shift is related to speed. At lower speed there exists lower emission factors at lower shift, and at higher speed there exists higher emission factors at higher shift. The conversion efficiency of catalytic converter is one of the factors influencing emission factors under different running conditions. 3 figs, 8 refs.

关 键 词：汽车工程 电喷汽油车 定容采样 稳态工况 排放特性 

分 类 号：U461[机械工程—车辆工程] TK411.5[交通运输工程—载运工具运用工程]