深圳市乘用车道路行驶工况构建

Construction of driving cycle for passenger vehicles in Shenzhen

选取深圳市代表性测试路线,采用平均车流法,对测试车辆车载GPS连续20 d、每天3个采样时间段进行数据采集,累计行驶里程达6 022 km.用短行程分析法构建深圳市城区乘用车行驶工况.结果显示,深圳市城区乘用车平均车速为28.63 km/h,匀速工况占时间比例为24.4%,加速和减速工况所占时间两者之和为52.9%,与国内其他城市相比,表现出较好的车辆排放工况.与欧美日标准工况相比,深圳市的平均车速比欧洲NEDC、美国FTP75、日本Japan15标准工况分别低14.8%、16.3%和15.5%,在加速、减速和各工况所占时间比例等其他参数上也有较大的差距.

By using the traffic flow averaging method,the data acquisition for the representative test routes in the city of Shenzhen is performed by an automotive GPS three times per day for 20 consecutive days,and the total mileage recorded is over 6 022 km. The typical car driving cycle in Shenzhen is constructed by short-range drive analysis method. The results show that the average speed of passenger vehicles in Shenzhen city is 28. 63 km / h. The proportion of the uniform speed is about 24. 4%,and the proportion of the acceleration and deceleration time is52. 9%. The vehicle emission conditions in Shenzhen are found to be better than those in other domestic cities. The passenger vehicle average speed in Shenzhen is found to be lower than those of Europe NEDC,US FTP75 and Japan15 standard conditions by 14. 8%, 16. 3% and 15. 5%, respectively. And significant differences in acceleration,deceleration,ratio of different modes and other characteristic values are also observed.