This research investigates the effects of an electric turbocharger in a hybrid electric
powertrain. First generic vehicle models are created and run to understand the
overall powertrain requirements of torque, power and energy of a performance
consumer vehicle. Then a low fidelity baseline model of a conventional vehicle is
created in Simulink to serve as a baseline measure.
To analyze an electric turbocharger system a high-fidelity model in AMESIM of a 4
cylinder turbocharged engine was modified. This engine model was analyzed using
virtual dynamometer tests and a simplified look-up table based controller was
developed for the electric motor within the electric turbocharger. Next this engine
model was inserted within three different types of hybrid powertrain architectures
models in AMESIM. Each hybrid powertrain required a unique supervisory
controller which was developed using Stateflow in Simulink. These controller
algorithms were imported into AMESIM and the model was simulated over standard
drive cycles. Since a very wide variation of electrification level exists within hybrid
powertrains the supervisory controllers are calibrated for charge-sustaining
simulations. This allows for impartial comparisons across the hybrid architectures.
Lastly a track drive cycle was developed to understand electric turbocharger effects
under high performance loading conditions / Thesis / Master of Applied Science (MASc) / Turbochargers on internal combustion engines can utilize a portion of waste
exhaust energy to pump more air into the cylinder leading to greater power and
efficiency. A modern high performance 4-cylinder turbocharged engine is capable of
replacing a V6 engine of much higher cylinder displacement. However turbocharged
engines suffer from ‘turbo lag’ when the engine cannot immediately produce power.
An electric turbocharger can virtually eliminate this ‘turbo lag’ as well as generate
electricity from excess energy the turbocharger does not use. Electric turbochargers
have been development by researchers and various automotive manufacturers.
However the potential effects of such a system within the framework of a hybrid
electric powertrain in a consumer vehicle has not been quantified. The objective of
this research is to use high fidelity models to investigate the effects of an electric
turbocharger system within a hybrid powertrain.
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/18039 |
| Date | 11 1900 |
| Creators | Arshad-Ali, Syed Kamran |
| Contributors | Emadi, Ali, Habibi, Saeid, Mechanical Engineering |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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