汽车动力性与经济性模拟计算分析

Analysis of the simulation for automobile power performance and fuel economy

通过理论分析，采用最小二乘法和曲面拟合法分别建立了发动机外特性和万有特性的数学模型，提出了汽车动力性与经济性各项评价指标的模拟计算方法，编写了汽车动力性与经济性模拟计算程序。通过实例计算对比，结果表明，采用模拟计算方法与试验检测所得结果有较好的一致性，该方法为汽车动力性与经济性模拟计算提供了有意义的理论参考。

The mathematical model for engine external and universal characteristics is produced by using least square method and using surface fitting method, the simulation of evaluation index is proposed and simulation program is compiled for automobile power performance and fuel economy . Compared with an example calculation, the results show that using simulation methods and experimental test results have a good consistency, which provides meaningful theoretical reference for the simulation of automobile power performance and fuel economy.