Holistic approach increases the knowledge of hybrid vehicles and emissions

Wednesday, October 24, 2018

Olov Holmér is a PhD student at the Department of Electrical Engineering at Linköping University and studies hybrid vehicles together with Professor Lars Eriksson, among others.

What is unique in your research?

“In our research we look at the interaction between electrical operation, combustion engine operation and the thermally inert and slow systems in the form of aftertreatment systems with sub-components such as particle filters and catalysts. Usually, the different systems are treated quite separately, but we study the entire system as a whole, with the goal of designing control systems with more integration between the systems.”

What are the challenges in the area?

“It is building the right models that capture the most important features, so that system studies can be performed. A large part of all available models have been designed for conventional vehicles and it is not sure that these capture the phenomena that arise in a hybrid vehicle, where, for example, the engine is switched off for a long time. For science and university research it is difficult to get measured data that isolates and captures the phenomena to be modeled.

What have you done so far?

“We have developed simulation models for various vehicle components and integrated them into new complete hybrid vehicle models.”

What will this result in?

“It will be an analysis of how much you can earn in fuel consumption and reduce NOx emissions if you were to hybridize a heavy truck that runs on the Swedish highway. We have also begun looking at new control strategies to warm up the aftertreatment system as quickly as possible.

What benefit can this have in a broader context?

“We learn more about hybrid vehicles and emissions so that we can develop better vehicles, which will utilize the electric mobility potential and reduce emissions.”

Where are the needs of further research?

“There is a need to continue to ensure the quality of existing models and to develop new models describing new phenomena that we want to study. An important part of this is to identify the most important effects of the thermal systems.”

/ Daniel Karlsson