Linköping University

Abstract

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Control Oriented Modeling of Engine Out Temperatures

To have knowledge about the exhaust temperature is of great importance in sev- eral ways. Knowing the exhaust temperature means that it is easier to protect the catalyst and turbine from too high temperatures but it also important in control- ling the turbine power. In this thesis a physically based model of the engine out temperature is devel- oped. The model is built up by two different cylinder pressure models and one engine out temperature model. Measurements has been made using a test engine at Linköping University. These measurement has then been used to parameterize and validate the model. Since the measurements of the engine out port temperature are not showing rea- sonable temperatures, the temperatures in the pipes has been used for validation. That makes the results less reliable since no heat transfer between the port and pipe are considered in the model.

Lars Malm

2018

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Last updated: 2021-11-10