重型车湿式桥非线性传动能量流耗分析

Analyzing on Nonlinear Transmission Energy Flows and Loss for the Wet Axle in the Heavy Vehicle

重型车湿式桥传动系统能量流动与损耗研究是车辆经济性、安全性及动力性的基础。现有研究主要简单分析单工况下齿轮箱的能量损耗,缺乏复杂工况下基于人车路的传动系统能量流耗精细综合研究。针对典型重型车辆循环作业下的湿式桥传动系统能量流耗进行综合分析,建立不同能量损耗类型的数学模型。考虑车辆循环作业能量流耗影响因素,基于键合图理论分析总成及系统能量流耗情况后,建立整个传动系统的能量流耗模型。此动力学模型与实车试验数据结合不但可以研究一般工况下的人车路湿式桥非线性能量流耗,还可以分析驱动滑转、制动滑移、转弯、轮荷及重心转移等复杂工况,这为今后研究和精确实车复杂工况下的能量流耗情况提供了一套可行的方法。

The study on transmission energy flows and loss for the wet axle in the heavy vehicle are the base of economy, security, power performance of vehicle. The existing researches focus on gear box energy loss under simple operating model, and the fine comprehensive study of transmission system energy flows and loss based on diver vehicle road under complicated operating model is scarce. The energy flows and loss of transmission system in wet axle under typical cycle operation of heavy vehicle are analyzed, and the mathematical models of different energy loss style are built. The influencing factors of energy flows and loss under vehicle cycle operating are considered, after the assemblies and system energy flows and loss are analyzed based on bond graph theory, the total transmission system energy flows and loss models are built in the end. The nonlinear energy flows and loss in wet axle on driver vehicle road under general operating model can be analyzed on the combination of this dynamic model with vehicle experimental data, even under complicated operating model as drive slipping, brake slipping, steering, wheels load and gravity center changing, etc. which provide the feasible method for energy flows and loss study and accurate calculation under complicated operating model.