Estimation Model of Pump Wheel Dynamic Torque Based on Load of Torque Converter

Abstract:

In order to solve the non association between the traditional torque converter pump wheel static model and its actual load characteristics, and to achieve the dynamic performance matching between the torque converter and the engine in initial configuration design, a pump wheel dynamic torque estimation model based on the load characteristics of torque converter was proposed. Based on the analysis of the existing torque converter model, the one dimension flow theory model, which took the load characteristics of the torque converter into account, was more comprehensive than the mass spring damper system model. Besides, the concept of load fluctuations of torque converter pump wheel torque model was proposed. The validity of pump wheel dynamic torque estimation model based on the load characteristics of torque converter was proved by comparing the analysis of load fluctuations through the method of controlling the variables with the results of the comprehensive CFD simulation experiments. This model provides guidance for the torque converter dynamic initial configuration design, which is associated with the load characteristics of the machine.