实际道行驶中汽车排放特性的研究(英文)

Investigation of Motor Vehicle On Road Exhaust Emissions Behavior

建立了一套用于道路行驶中气体排放测量的数据采集系统。利用这套系统可以直接和连续地测量道路行驶中气体排放的浓度。实验中还测量了发动机转速，燃油油耗，记录了车的档位。从这些测量数据中计算出了汽车尾气排放的排放因子（ｇ／ｋｍ），得到了废气排放量与车速，加速度，负载和档位的关系，发现了一些稳态实验中观察不到的排放特性。

An exhaust gas measurement system for on road use has been developed,which enables the direct and continuous determination of the exhaust gas mass emission rate from motor vehicles on the road.Using this system the instantaneous volume fraction of exhaust gases,air fuel ratio,engine speed,vehicle speed,fuel consumption rate and gear position were recorded during the test under realistic road conditions.The test was repeated many times.From the test results,a very informative view of the exhaust emissions behavior of a motor vehicle on the road was obtained,which is difficult to be simulated in laboratory tests.