基于逐步回归分析法的整车热平衡试验数据研究

Research on data of vehicle thermal balance test based on gradual regression analysis method

基于大量转毂热平衡试验数据,选取环境温度、中冷器前后空气温升、增压气体温度与环境温度的平均温差、中冷器后温度与环境温度差、散热器进出水温差、散热器前后空气温升等10个参数作为自变量,以整车许用环境温度作为因变量,运用逐步线性回归分析方法,确定其中7个对许用环境温度有显著影响的主要参数,建立其与许用环境温度之间的等效关系,定量分析各主要参数对许用环境温度的贡献量,明确各主要参数的推荐值,为试验数据分析和整车冷却系统的改进设计提供参考。

Base on a large number of thermal balance test results and10 parameters such as ambient temperature,pre-and post air temperature rise of the intercooler,average temperature difference of turbocharged air and ambient temperature,difference of the post intercooler temperature and ambient temperature,in-and out temperature differenceof radiator and pre-and post air temperature rise of the radiator selected as independent variables and the allowable ambient temperature as the dependent variable,the gradual linear regression analysis method is used to determine 7 mainones of 10 parameters which greatly influence the allowable ambient temperature,establish the equivalent relationship with the allowable ambient temperature,make the quantitative analysis of the contribution of the main parameters to the allowable ambient temperature,and definethe recommended values for each key parameter,which provides reference for the test data analysis and the improved design of the vehicle cooling system.