车用大功率柴油机与液力变矩器动态匹配影响因素分析

Analysis of Dynamic Matching Factors of High-power Diesel Engine and Hydrodynamic Torque Converter

为研究装甲车辆液力传动系统的动态匹配问题,对车用大功率柴油机与液力变矩器动态匹配的影响因素进行了分析。对柴油机和液力变矩器所组成系统动态匹配的动力性和经济性指标进行了合理定义。将基于有限试验数据的柴油机神经网络模型和基于混合流道法的变矩器计算流体力学仿真模型相结合,构建了柴油机与液力变矩器动态匹配性能计算程序。依据该计算程序对影响匹配性能的结构性因素进行试验设计分析,找出了变矩器有效直径和中间传动比对匹配性能影响的主效应和交互效应;分析了油门开度和变矩器闭锁速比等使用性因素对最优动态匹配区域的影响规律。结果表明:结构性因素是影响动态匹配性能的主要因素,使用性因素是相对次要因素,但使用性因素会在一定程度上造成最优匹配区域的位置和最优指标数值的变化。

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 opti-mal matching region and the values of optimal indexes to a certain extent.