瞬态工况对车辆污染物排放的影响

试验室使用的稳态工况和车辆在城区道路行驶时的瞬态工况有很大差异，测试结果不能真正反映车辆的瞬态排放工况，文章主要介绍了CO，HC及NOx的生成机理，阐述了瞬态工况对汽油车和柴油车各个污染物排放的影响，提出车载排放测试技术可以不受这些因素影响，可以在实际道路运行条件下对车辆排放进行实时测量，真实反映车辆实际道路行驶的排放情况，反映外界环境条件的变化对车辆排放的影响。

Influence on Vehicle Pollutant Emissions by Transient Mode

It has differences between steady-state mode in laboratory and urban driving transient mode. The test result can not reflect the emission of vehicles in transient mode. The formation mechanism of CO, HC, NOx and PM is mainly introduced in this paper. The influence of various pollutant emissions from gasoline automobiles and diesel vehicles in the transient mode is studied. It is proposed that on-board emission test technology can not influenced by these factors. The vehicles emission can be measured in real-time in the actual road. The actual vehicle emissions on road can be truly reflected. And the influence of environmental condition change on vehicle emissions can be reflected.