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Dennis Kibalama MS Thesis.pdf (5.65 MB)

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Design and Implementation of a Belted Alternator Starter System for the OSU EcoCAR 3 Vehicle

Kibalama, Dennis Ssebina
http://orcid.org/0000-0001-7373-6455
http://rave.ohiolink.edu/etdc/view?acc_num=osu1499247562822345

Abstract Details

2017, Master of Science, Ohio State University, Electrical and Computer Engineering.
The transportation sector is a great contributor to overall energy consumption and emissions. Stringent regulations have been put in place to curb the emissions and regulate fuel consumption due to dependency on a finite resource, fossil fuels. This has driven OEMs to re-engineer the automotive powertrain which has led to a burst in production of PHEVs, HEVs and EVs. The U.S. D.O.E, General Motors, Argonne National Laboratory (ANL) and other industry sponsors have spearheaded (Advanced Vehicle Technology Competitions) AVTCs with a goal of training the next generation of automotive engineers by challenging collegiate teams to re-engineer stock vehicles to improve fuel consumption, reduce emissions while maintaining consumer acceptability. The latest in this AVTC series is the EcoCAR 3, a 4-year competition which challenges 16 North American university teams to re-engineer a 2016 Chevrolet Camaro into a HEV while maintaining the performance aspects of the iconic American car. The OSU EcoCAR 3 vehicle boasts a Parallel-series post transmission PHEV architecture designed by the team in Year 1 of the competition. To meet the team designed (Vehicle Technical Specification) VTS targets, the architecture includes a motor coupled to the engine, a Belted Alternator Starter (BAS) which performs engine start/stop, series operation, speed matching and torque assist. Due to the versatility of the component in realizing the VTS targets, this thesis sets to outline the design and validation work done with regards to the BAS system. The BAS system consists of the electric machine, the engine, belt transmission, inverter and battery pack. The thesis outlines the design metrics considered in the design of the BAS system ranging from electrical, performance, mechanical and thermal considerations. The BAS chosen is a sponsor donated component that wasn't supplied with an inverter solution. This thesis details the two inverter choices adopted over Years 2 – 3 of the competition and the control, calibration, validation, performance and packaging carried out to realize functionality of the BAS. To accurately model the dynamics of the BAS system during engine startup, a dynamic engine model is developed to model engine, BAS and belt transmission dynamics. The underlying assumptions made to develop an accurate representation of the dynamics while minimizing calibration efforts are also outlined. This model will be used in Year 4 for development and optimization of an engine start/stop controller. The thesis also analyses the two control methods adopted for engine start; an open loop controller and a closed loop controller and evaluates the performance of the controllers in terms of rise time, engine speed overshoot, maximum jerk and root mean square acceleration. This thesis encompasses the design and validation work done to move the BAS system development work from a component/subsystem level to vehicle/system level. This sets the team in a good position heading into Year 4 of the competition to implement engine start/stop functionality in the vehicle, optimize torque assist functionality and use the BAS for speed matching for faster shift times.
Giorgio Rizzoni (Advisor)
Levent Guvenc (Committee Member)
Shawn Midlam-Mohler (Committee Member)
106 p.
Electrical Engineering
BAS; Belted Alternator Starter; EcoCAR

Recommended Citations

Citations

  • Kibalama, D. S. (2017). Design and Implementation of a Belted Alternator Starter System for the OSU EcoCAR 3 Vehicle [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1499247562822345

    APA Style (7th edition)

  • Kibalama, Dennis . Design and Implementation of a Belted Alternator Starter System for the OSU EcoCAR 3 Vehicle. 2017. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1499247562822345.

    MLA Style (8th edition)

  • Kibalama, Dennis . "Design and Implementation of a Belted Alternator Starter System for the OSU EcoCAR 3 Vehicle." Master's thesis, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1499247562822345

    Chicago Manual of Style (17th edition)

osu1499247562822345
2,498
© 2017, some rights reserved.Creative Commons License Design and Implementation of a Belted Alternator Starter System for the OSU EcoCAR 3 Vehicle by Dennis Ssebina Kibalama is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.