Analysis of dynamic matching factors of high-power diesel engine and hydrodynamic torque converter

In order to study the dynamic matching of hydrodynamic transmission system for armored vehicles, the influence factors of the dynamic matching of high-power diesel engine and hydrodynamic torque converter are analyzed. The reasonable definitions of dynamic matching power and economic indexes of the system consisting of diesel engine and hydrodynamic torque converter are given. A calculation program for dynamic matching performance of diesel engine and hydrodynamic torque converter is established by combining the neural network model of diesel engine based on finite test data with computational fluid dynamics simulation model of converter based on the hybrid flow channel method. The structural factors of influencing the matching performance are analyzed through design of experiment, and the main effect and interaction effect of which the effective diameter of converter and the intermediate drive ratio affect the matching performance are obtained. The influences of throttle opening and torque converter's locking ratio on the optimal dynamic matching region are also analyzed. The results show that the structural factors are the main factors which affect the dynamic matching performance, and the application factors are the relative secondary factors. However, the application factors can cause a change in the location of optimal matching region and the values of optimal indexes to a certain extent.