Study of dual closed-loop control strategy of exhaust gas recirculation for diesel engines

ABSTRACT

With the rapid development of the global economy, more vehicle ownership leads to the increasing of environmental pollution in recent years. In response to this matter, exhaust gas recirculation (EGR) has been used in most modern diesel engines, to control NO_x emissions effectively. In this work, a dual closed-loop EGR control system was modeled by coupling the one-dimensional cycle simulation and the logic under Matlab/Simulink environment. The intake airflow and EGR valve position are regarded as the control targets in the key control logic concept. The results show that the deviation between simulation and experimental results is smaller than 5%, which can meet the needs of practical application. Moreover, the accuracy and feasibility of the code generated by the Real-Time Workshop module are verified simultaneously.

KEYWORDS:

• Dual closed-loop control
• diesel engines
• EGR
• control strategy
• simulation

Acknowledgments

This work is supported financially by the National Key Research Development Program of China (Grant No.2017YFB0103402), the Six Talent Peaks Project in Jiangsu Province (JXQC-010), Priority Academic Program Development of Jiangsu Higher Education Institutions and the Young Backbone Teachers Training Project of Jiangsu University.

Additional information

Funding

This work was supported by the Six Talent Peaks Project in Jiangsu Province [JXQC-010];National Key Research Development Program of China [Grant No.2017YFB0103402].