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实际道路运行工况下轻型车排放特征研究

Keywords: 车载排放测试,轻型车,速度,加速度,质量排放率

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Abstract:

针对定量评价机动车在特定运行状况下排放状况的问题,采用轻型车在OEM-2100的基础上搭建了车载排放测试试验平台进行实际道路试验.分析了机动车在不同运行工况模式下3种排放污染物的差异;分别分析了速度和加速度对机动车3种排放污染物质量排放率的影响,并获得了速度和加速度联合分布下3种污染物的排放特征.研究结果表明加速工况下的排放值要明显高于其他工况,巡航次之,其次是怠速和减速;速度和加速度对车辆排放都有较大的影响,轻型车的行驶速度控制在30~50km·h-1范围内中速行驶,加速度小于等于0.5m·s-2时,可达到最佳的排放性能.

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