The design of SCR controller for national fifth emission standard in light diesel vehicle

Abstract

With the implementation of the national fifth emission standard around the country, the post-processing system of diesel truck will become more stringent. In this paper, the controller of the selective catalytic reduction(SCR) system will be designed to meet the national fifth emission standard. The main method is to study the injection control strategy of SCR system. Then the catalyst model of SCR system and the open loop control system model are established in MATLAB/Simulink and the accuracy of the control model is verified by experiments. The layer code of algorithm is generated by MATLAB/Simulink automatically. Additionally, the paper transplants the preparation of related underlying module with the algorithm layer to achieve the software layer of SCR system. Finally, the diesel engine with SCR system will be tested in the European test steady-state cycle(ESC) and Europe transient test cycle(ETC).

Keywords

• catalyst model of SCR
• open loop control model
• underlying module
• ESC
• ETC