Research ArticleHigh pressure common rail injection system modeling and control

- A complete mathematical model of HPCRIS is provided.
- The proposed HPCRIS mathematical model is simulating in Matlab/Simulink and validated by AMESim softwares.
- An ESO-based iPI controller is designed, and provides simple structure, easy parameter tuning and excellent performance.
- The proposed ESO-based iPI controller compared with PID and ADRC is validated both by MATLAB/Simulink and AMESim softwares.

In this paper modeling and common-rail pressure control of high pressure common rail injection system (HPCRIS) is presented. The proposed mathematical model of high pressure common rail injection system which contains three sub-systems: high pressure pump sub-model, common rail sub-model and injector sub-model is a relative complicated nonlinear system. The mathematical model is validated by the software Matlab and a virtual detailed simulation environment. For the considered HPCRIS, an effective model free controller which is called Extended State Observer - based intelligent Proportional Integral (ESO-based iPI) controller is designed. And this proposed method is composed mainly of the referred ESO observer, and a time delay estimation based iPI controller. Finally, to demonstrate the performances of the proposed controller, the proposed ESO-based iPI controller is compared with a conventional PID controller and ADRC.