重型货运汽车排放状况分析

Analysis of Heavy-Duty Trucks Emission Status

以广州市重型货运汽车加载减速排放数据为分析样本,通过引入最大值均值参数和功率比参数,分析了重型货运汽车的总体排放状况、各测量工况排放状况及发动机功率衰减状况等,并对占比较大、代表性较强的4个主要品牌车辆之排放与功率衰减情况进行了比较分析,得出了广州市重型货运汽车的整体排放状况较好,功率衰减程度整体较轻,部分车辆的加载减速排放最大值并不处于车辆发出最大轮边功率(Max HP)测量工况,黄标车的最大值均值约为国Ⅲ车的近2.5倍,国Ⅳ车的近4倍等结论。

Taking Lug Down emission test data of Guangzhou heavy-duty trucks as the analysis samples, the general emission and the different speed mode emission and the power attenuationwere analyzed for engines of heavy-duty trucks andthe emission and the power attenuations were compared between the 4 main brand trucks that the proportion was larger and representative was better by introducing average of maximum value and power ratio parameters. The results was that the Guangzhou heavy-duty trucks had generally good emission status and the lower power attenuation, and the Lug Down emission maximum values were not emitted in the vel Max HP test mode for part heavy-duty trucks, and the average of maximum value of the yellow mark trucks was nearly 2.5 times for China III trucks and 4 times for China IV truck, and so on.