面向控制的汽油机颗粒捕集器温度模型

Control-Oriented Temperature Model for Gasoline Particulate Filter

结合汽油机颗粒捕集器(GPF)内部对流换热和放热与吸热化学反应,基于能量守恒和热平衡方程分别建立了包含分项反应热和综合反应热的零维数学模型,以GPF入口温度、排气质量流量、碳载量和含氧量为输入,构建面向控制的MATLAB/Simulink模型,并利用不同初始碳烟载荷下汽油直喷发动机减速断油试验的动态数据检验模型。结果表明,包含综合反应热的温度模型更简单、实时性更好,适用于GPF控制中的温度预测。

Take into consideration of the convection heat transfer with exothermic and endothermic chemical reactions inside the gasoline particulate filter,a zero-dimensional mathematical model with the itemized and combined reaction heat is established based on the energy conservation and thermal equilibrium equations.With the inlet temperature,exhaust mass flow,soot load and oxygen content as inputs,a control-oriented MATLAB/Simulink model is constructed and verified by use of dynamic data from the GDI engine deceleration&fuel cutoff tests under different initial soot loads.The results show that the temperature model with combined reaction heat is simpler and better real-time,which is suitable for temperature prediction in GPF control strategy.