基于伪键合图的内燃机建模与仿真

IC Engine Modeling and Simulation Based on Pseudo-Bond Graph

内燃机是一个热力系统和机械系统耦合的动力装置,由于热力学系统的复杂性,真键合图的内燃机建模受到了一定限制。为此,提出了基于伪键合图的内燃机建模方法,建立了内燃机全工作过程的键合图模型,导出了此模型的状态方程。并结合某混合动力汽车的内燃机结构参数,对该模型进行了动力学仿真,得到了理想的仿真结果。

IC engine is a power source with thermodynamics and dynamics phenomena. Because of the complexity of the thermodynamics system, the true bond graph modeling method can not be adopted conveniently. Pseudo-bond graph modeling method was put forward, according to which, a simulating model describing the whole working process of an IC engine was set up. On principle of bond graphs, the normal state equation was deduced. Based on the model and the structure parameters of an actual engine mounted on a hybrid vehicle, the sound simulation result was achieved.