上海市在用车推行I/M制度中检测方法的研究

对在用车实施I/M制度，采用底盘测功机模拟道路工况检测汽车排放污染物，按美国国家环保局（EPA）推荐的方法有3种：瞬态短工总法（IM240）、稳态加速模拟工况法（ASM）和瞬态短工部简易质量分析检测法（VMAS）。根据上海市的试验结果，对上述3种方法的检测精度、设备投资以及运行维护诸方面进行分析比较，阐明上海市采用VMAS方法的依据和应注意的问题，并对应采用的模拟道路工况提出了看法。

Study On Short Tests Used in Enhancing I/M Program in Shanghai

In order to select a short test used in enhancing I/ M program in Shanghai, introducing three kinds of short tests which proposed by USEPA for enhancing I/M program were presented.Based on the study on correlation coefficient(R2)that is often used to compare of I/M test effectiveness with another,expound the reason why the short test VMAS(Vehicle Mass Analy-sis System) has been selected by Shanghai EPB for enhancing I/M program test in Shanghai,and accord-ing to the result of exhaust test from in-use vehicles in Shanghai proposed the dynamometer driving schedules and the emisssion standards used in Shanghai.