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摘要: 搭建了机动车车载排放测试平台, 获取了实际排放数据。对轻型车比功率进行了分区, 得到了3种排放污染物的质量排放率。基于OD数据反推, 将速度和加速度作为输入参数, 采用排放模型和交通仿真模型, 计算了城市区域的机动车排放总量与排放比例。计算结果表明: 在晚高峰时段, CO、HC、NOx3种排放污染物的小时排放量分别为163.364 7、19.453 9、77.701 8kg; 轻型车、中型车和公交车的CO排放比例分别为65.45%、29.57%、4.98%;轻型车、中型车和公交车的HC排放比例分别为57.68%、26.03%、16.29%;轻型车、中型车和公交车的NOx排放比例分别为48.11%、4.63%、47.26%;轻型车和中型车是CO和HC排放控制的重点, 而公交车为NOx排放控制的重点。Abstract: The on-board emission test platform of vehicles was put up, and the actual emission data were obtained.The specific power divisions of light-duty vehicles were carried out, and the quality emission ratios of three emission pollutants were gotten.Based on OD data back-stepping, speed and acceleration were taken as input parameters, and the total emissions and emission ratios of vehicles in urban region were calculated by using emission model and traffic simulation model.Calculation result indicates that during late-peak period, the hour emissions of CO, HC and NOx are 163.364 7, 19.453 9 and 77.701 8 kg respectively.CO emission ratios of light-duty vehicles, middle-duty vehicles and busses are 65.45%, 29.57% and 4.98% respectively.HC emission ratios of light-duty vehicles, middle-duty vehicles and busses are 57.68%, 26.03% and 16.29% respectively.NOx emission ratios of light-duty vehicles, middle-duty vehicles and busses are 48.11%, 4.63% and 47.26% respectively.Light-duty and medium-duty vehicles are the emission control emphases of CO and HC, and busses are the emission control emphasis of NOx.
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表 1 车辆参数
Table 1. Vehicle parameters
车型 出厂年份 行驶里程/km 发动机排量/L 捷达Gix 2001 42 000 1.6 红旗CA7201 2004 35 000 2.0 捷达Gix 2002 23 000 1.6 海狮锐驰 2002 28 000 2.4 海狮锐驰 2006 20 000 2.4 哈弗H3 2008 18 000 2.4 表 2 轻型车的比功率分区与质量排放率
Table 2. Specific power divisions and quality emission ratios of light-duty vehicles
mg·s-1 分区 比功率/(kW·t-1) 污染物 CO HC NOx 1 V < -10 1.902 5 0.067 3 0.343 7 2 -10≤V < -2 2.091 8 0.103 0 0.504 6 3 -2≤V < 0 2.541 9 0.159 3 0.556 2 4 0≤V < 2 1.823 7 0.232 3 0.585 5 5 2≤V < 5 2.353 3 0.189 6 0.691 6 6 5≤V < 9 2.245 1 0.259 2 0.821 6 7 9≤V < 13 2.696 4 0.318 0 1.090 6 8 13≤V < 17 4.072 5 0.438 3 1.176 4 9 17≤V < 20 3.997 9 0.547 2 1.358 8 10 20≤V 4.513 5 0.517 4 1.451 4 表 3 OD数据
Table 3. OD data
veh 区域 1 2 3 4 5 6 7 8 9 10 11 12 13 行和 1 390 50 150 30 20 90 20 20 20 20 20 20 850 2 150 20 100 10 10 80 60 40 40 200 335 200 1 245 3 88 120 110 10 10 46 40 80 40 20 40 20 624 4 50 140 50 110 80 188 120 200 100 230 324 180 1 772 5 10 10 10 30 108 60 200 68 40 20 20 20 596 6 10 10 10 10 10 10 10 10 10 10 10 10 120 7 35 70 30 200 10 10 0 80 60 60 80 60 695 8 0 0 0 0 0 0 0 0 0 0 0 0 0 9 114 160 180 350 20 10 80 60 180 244 330 160 1 888 10 54 120 80 160 10 10 10 10 160 204 260 180 1 258 11 35 120 80 210 20 15 140 60 120 20 120 100 1 040 12 120 380 180 410 60 20 80 60 170 90 218 210 1 998 13 95 140 40 180 10 10 150 40 230 190 110 150 1 345 列和 761 1 660 730 1 910 300 303 934 680 1 178 790 1 336 1 689 1 160 表 4 交通状况
Table 4. Traffic conditions
参数 取值 轻型车及中型车平均速度/(km·h-1) 11.82 公交车平均速度/(km·h-1) 8.81 所有车辆平均速度/(km·h-1) 11.69 轻型车及中型车平均延误/s 438.00 公交车平均延误/s 769.21 所有车辆平均延误/s 451.94 表 5 质量排放率
Table 5. Quality emission ratios
mg·s-1 车型 污染物 CO HC NOx 轻型车 2.224 0 0.223 3 0.665 5 中型车 3.192 4 0.320 2 0.203 4 公交车 4.843 5 1.805 3 18.708 5 表 6 排放总量
Table 6. Total emissions
kg·h-1 污染物 CO HC NOx 排放总量 163.364 7 19.453 9 77.701 8 -
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