多轴车辆动力传动系统建模与仿真

Modeling and simulation of multi-axle vehicle powertrain system

为了研究多轴车辆动力传动系统动态载荷特性,开发了多轴车辆动力传动系统动力学仿真模型。根据柴油发动机负荷特性试验数据构建循环供油量-转速-扭矩MAP图,通过模糊PI控制器对发动机循环供油量进行调节,建立了发动机动态特性模型;建立了液力变矩器模型、换挡离合器模型以及分动箱、过桥齿轮箱、主减速器、轮边减速器等传动部件模型。利用MATLAB/Simulink建立了多轴车辆动力传动系统动力学仿真模型,并进行了仿真分析,实车试验结果表明,仿真模型可有效模拟车辆动力传动系统的速度特性和动态载荷特性。

In order to study the dynamic load characteristics,the multi-axle vehicle powertrain system dynamics simulation model was developed. First,the engine dynamic characteristic model was built by obtaining the cycle fuel injection quantity-rotate speed-torque MAP according to the load characteristic test data and establishing a fuzzy PI controller to adjust the cycle fuel injection quantity. Second,the transmission system was built with modeling of the torque converter,the simplified clutch model,the transfer case,the interaxle differential,the main reducer,the wheel-side reducer,etc. Finally,the multi-axle vehicle powertrain system dynamics simulation model was established in Simulink. The comparison results between simulation and test data show that the model effectively simulates the dynamic load characteristics and the speed characteristics.