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为掌握我国大城市汽车实际行驶时的能耗与排放特征,利用车载测试系统实时记录了北京市内汽车实际道路行驶的速度、油耗和排放数据。解析得到不同种类道路(快速路,主干路,次干路,支路)在不同时间段(高峰期,非高峰期)下的各种特征参数,同时建立起适合北京市汽车油耗与排放测量的四种瞬态行驶工况,并在转毂试验台上进行了模拟测试。结果表明,高峰期比非高峰期车速下降约31%,油耗上升11.1%～13.1%,另外CO排放量升高12.4%～94.4%,HC升高50%～84%,NOx升高9.5%～30%。
In order to grasp the energy consumption and emission characteristics of the actual driving of metropolitan cities in our country, the in-vehicle test system is used to record the real-time speed, fuel consumption and emission data of the actual roads in Beijing. Various characteristic parameters of different types of roads (expressways, trunk roads, secondary roads, and sub-roads) at different time periods (peak and off-peak periods) are analyzed and analyzed, and at the same time, a set of characteristic parameters suitable for automobile fuel consumption and emission measurement in Beijing Four kinds of transient driving conditions, and carried out in the hub test bench simulation test. The results showed that the peak-hour was reduced by about 31% and the fuel consumption by 11.1% -13.1% compared with that at the non-peak. The CO emission increased by 12.4% -94.4%, HC increased by 50% -84% and NOx increased by 9.5% 30%.