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Technical Paper

Model of a Supercharged Diesel Engine with High and Low-Pressure EGR as Part of an NMPC for ECU Implementation

2007-09-16
2007-24-0084
The paper focuses on a system and an appropriate controller concept for advanced air management of a turbo-charged passenger car diesel engine. The proposed air management system consists of a VTG turbocharger and two separate Exhaust Gas Recirculation (EGR) loops, a cooled or non-cooled high-pressure EGR (HP EGR) and a cooled low-pressure EGR (LP EGR) loop. In the LP EGR loop, the exhaust gas leaving the particulate filter is mixed with fresh air just in front of the compressor inlet. A main model (MM) was created in Simulink to design a Nonlinear Model-based Predictive Controller (NMPC). This model is mainly founded on physical equations, allowing easy adaptation to various systems. MM is a detailed model which was developed first and which is also used for software-in-the-loop (SIL) tests of the controller with the simulated engine.
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