Modeling and Estimation of Long Route EGR Mass Flow in a Turbocharged Gasoline Engine
Due to the continuous work in the automobile industry to reduce the environmental
impact, reduce fuel consumption and increase efficiency, new technologies
need to be developed and implemented in vehicles. For spark ignited engines,
one technology that has received more attention in recent years is long route Exhaust
Gas Recirculation (EGR), which means that exhaust gases after the turbine
are transported back to the volume before the compressor in the air intake system
of the engine.
In this work, the components of the long route EGR system is modeled with mean
value engine models in Simulink, and implemented in a existing Simulink engine
model. Then different methods for estimating the mass flow over the long route
EGR system are compared, and the transport delays for the recirculated exhaust
gases in the engines air intake system are modeled. This work is based on measurements
done on an engine rig, on which a long route EGR system was installed.
Finally, some ideas on how a long route EGR system on a gasoline engine can be
controlled are presented based on the results in this thesis work.
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Last updated: 2019-12-17