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Control of an 8L45 transmission inside the Colorado State University EcoCAR 3 2016 Chevrolet Camaro

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dc.contributor.authorKnackstedt, Clinton, author
dc.contributor.authorQuinn, Jason, advisor
dc.contributor.authorBradley, Thomas, committee member
dc.contributor.authorMarchese, Anthony, committee member
dc.date.accessioned2022-01-07T11:28:13Z
dc.date.available2022-01-07T11:28:13Z
dc.date.issued2021
dc.description.abstractThe hybridization and electrification of vehicles brings new challenges to the engineering and development of automotive control systems. Parallel, single motor pre-transmission hybrid electric vehicles are a preferred design for hybrid vehicles because of the mechanical simplicity, in that the electric motor and engine are on a common axis, connected to the transmission. Mechanically, this configuration enables the electric motor to take advantage of the torque multiplication of the final drive gear and transmission. From a controls perspective, this configuration is complicated because the engine, motor and transmission must work together to achieve the system-level objectives of fuel economy and driveability. These challenges are exemplified in the development of the hybrid 2016 Chevy Camaro developed by the Colorado State University (CSU) EcoCAR 3 team. The results of this thesis demonstrate model development, model validation, and controls development to control the operation of the electric motor and engine together for driveability and performance during transmission gear changes. A model was developed in MATLAB Simulink to predict the behavior and performance of the 8-speed automatic transmission 8L45 that is stock to the 2016 Chevrolet Camaro. The performance of this model was validated by comparison to on-track vehicle data with <0.3m/s average error in prediction of the vehicle speed trace. A control system was developed to enable control of electric motor torque during shifts which eliminates ignition timing-based torque requests while maintaining driveability-derived shift dynamics. This work has implications for the design of automatic transmission hybrid electric vehicles with discussion focusing on the potential for integration of learning technologies and minimization of gear lash.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierKnackstedt_colostate_0053N_16690.pdf
dc.identifier.urihttps://hdl.handle.net/10217/234141
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2020-
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectautomotive control systems
dc.subjecthybrid electric vehicles
dc.subjecttransmission
dc.subjectfuel economy
dc.subjectdriveability
dc.subjectEcoCAR 3D
dc.subjectgears
dc.titleControl of an 8L45 transmission inside the Colorado State University EcoCAR 3 2016 Chevrolet Camaro
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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