摘要
介绍了不确定度的评定步骤,分析了影响NOx比排放量的因素,导出了NOx比排放量不确定度的传播率。分别采用A类、B类评定方法对各影响因素的不确定性进行了计算评价,最终得到了NOx比排放量不确定度。分析了各输入量对发动机功率和NOx质量流量的影响程度,为提高NOx排放的测量的准确性提供了改进方向。
The evaluation procedure of uncertainty was introduced in the paper, the factors influencing NOx specific emission were analyzed, and the uncertainty transfer ratio of NOx emission specific emission was deduced. The uncertainty of those influencing factors was calculated and evaluated with evaluation method A and evaluation method B respectively, and finally the uncertainty of NOx specific emission was acquired. In addition, the influences of input parameters on engine power and NOx mass flow were analyzed, providing method of improving accuracy of NOx emission measurement.
出处
《汽车技术》
北大核心
2009年第11期47-51,共5页
Automobile Technology
