针对GDI发动机共轨系统的轨压控制要求,设计了基于模型的轨压控制器。首先推导了GDI发动机燃油喷射系统的非线性模型,并对模型进行了合理简化以便进行控制器设计。为了有效处理系统的非线性特性,采用滑模控制方法设计了具有Lyapunov稳定性的轨压控制器,同时对控制器进行相应处理以便于工程实现。最后,仿真结果验证了控制器的有效性。 Aiming at the rail pressure control requirements of GDI engine common rail system, a model-based rail pressure controller is designed. First, the nonlinear model of GDI engine fuel injection system is deduced, and the model is reasonably simplified for controller design. In order to effectively deal with the non-linearity of the system, a sliding pressure controller with Lyapunov stability was designed by sliding mode control, and the controller was processed accordingly for engineering implementation. Finally, the simulation results verify the effectiveness of the controller.