车辆动力传动系模型库的开发与应用

研究基于面向对象物理系统建模语言Modelica的车辆动力传动系模型库的开发。利用模型库的面向对象、多重继承、可重用等特点，采用充排法建立了一个四缸汽油机模型，并且结合某变速箱的具体结构和换档规律图，建立了适用于前／后向仿真的车辆动力传动系模型，即可以按照驾驶员的驾驶意图来分析系统的换档动态特性，也可以根据不同的车辆行驶工况考察动力传动系的转矩响应，为动力传动系的性能研究提供了一种建模方法。

Development and Application of Model Library for Vehicle Powertrain

The method for developing powertrain library based on the object -oriented physical modeling language Modelica is presented. A four cylinder gasoline engine model has been developed with filling and emptying method using the library characteristics of object - oriented, multi - inheritance, reusability. Through a transmission model and shift rule, the powertrain model which will be suite for forward/backward simulation is achieved. The shift dynamic character and the compatibility of the powertrain torque under different driving cycle can be analysed with the model. The result shows that it is an exacter and more feasible method for researching performance of powertrain.