Abstract
Environmental concern has recently led to severe regulations on exhaust emissions and fuel consumption in automotive engines. Direct fuel injection systems have attracted attention as new technology for meeting these regulations. This system needs exhaust gas recirculation in order to reduce NOx components on exhaust emissions.
This paper presents an exhaust gas recirculation model for control design and evaluation in direct injection systems. The proposed model is constructed based on physical laws such as the mass conversation law and the ideal gas equation. This enables the model to simulate the engine process accurately.
Comparison between simulation results and experimental results shows that the model has high accuracy. Moreover, a few examples in which the proposed model is applied to control design are shown.
