由示功图数据计算NO_X浓度中有关计算精度若干问题的探讨

Study on the Accuracy of NOx Emission Calculation Based on the Data from Indicator Diagram

汽车有害排放浓度数值计算，影响因素众多，有设计参数、运行参数、燃烧参数、测试参数、程序的调整参数等，要提高计算精度，就要抓住影响计算精度的主要因素，找出其变化规律。这样，可以缩短计算时间，提高计算精度。

The Accuracy in the calculation of harmful exhaust emission desity for automobile is affected by a number of param parameters, such as design, operation, combustin, measurement and etc. In order to improve the calculation accuracy it -is necessary to find out the main factors and the rule of change. In this way the calculation time can be reduced and the calculation accuracy improved .