车用内燃机尾气排放是主要的大气污染源之一。在城市中各种车辆的工况变化频繁,加速、怠速等是比较典型工况,而瞬态过程的排放与稳态过程又有较大差距。欧Ⅲ排放法规也已对此作出了规定。本文简要介绍了瞬态工况排放测量的发展现状。同时提出了现有条件下我国研究瞬态排放的一些测试方面设想。 Vehicle internal combustion engine exhaust emissions is one of the major sources of air pollution. In cities, the working conditions of various vehicles change frequently, and acceleration, idle speed and so on are typical working conditions, and there is a big gap between the emissions and steady-state processes of transient processes. Europe Ⅲ emission regulations have also made this provision. This article briefly introduces the current status of emission measurement in transient conditions. At the same time, some tentative suggestions on transient emissions in China under current conditions are put forward.