Modeling and simulation of the common rail fuel injection system of the diesel engine

This study represents a simulation modelling of the high-pressure common rail fuel injection system (HPCRIS) in s diesel engine. Moreover, the effect of applying simple proportional integral derivative PID controller on the pressure of common rail and the injection process is demonstrated. The developed model includes four sub-systems; they are the high-pressure pump sub-system, the common rail sub-system, the pressure control valve (PCV) subsystem and the injector sub-system. The injector sub-system contains three sub-models, they are the solenoid model, the working chamber model, and the needle model. All these sub-models including mechanical, hydraulic and electrical subsystems are based on Kirchhoff's law, conservation equations, and Newton's motion low. For this complicated nonlinear system, MATLAB/Simulink software environment is used as it achieves a high degree of flexibility and allows simulation for nonlinear systems. The results of the simulation are investigated for checking validation of the developed HPCRIS model. The results show that the simulation model can meet the control demand of the HPCRIS.