Abstract: In order to implement the dynamics matching between the working condition characteristics of vehicles and the type selection of hydraulic torque converters,an integral weighted evaluation method (IWEM) for the cus- tom-made type selection of torque converters is proposed.In this method,on the basis of the load characteristics of the vehicle,the speed ratio interval-efficiency weights of the torque converter are set correspondingly,the efficien- cy characteristic curve is segmented and integrated,and the corresponding integral weighted evaluation value is calculated and used as the evaluation standard of the economic performance of torque converters.Then,two exist- ing torque converter models are used as the objects to verify the effectiveness of the proposed IWEM for the custom- made type selection of torque converters.The results indicate that IWEM helps to set up the dynamic mapping rela- tionship between the vehicle and the accessories with ease.Thus,the custom-made type selection of hydraulic torque converters with engineering significance can be successfully implemented.

Key words: hydraulic torque converter, economic performance, evaluation standard, custom-made type selection