Performance improvement of a two speed EV through combined gear ratio and shift schedule optimization

Zhou, X; Walker, P; Zhang, N; Zhu, B

Performance improvement of a two speed EV through combined gear ratio and shift schedule optimization

Zhou, X Walker, P

Zhang, N

Zhu, B

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Publication Type:: Conference Proceeding
Citation:: SAE Technical Papers, 2013, 2
Issue Date:: 2013-01-01

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Field	Value	Language
dc.contributor.author	Zhou, X	en_US
dc.contributor.author	Walker, P https://orcid.org/0000-0003-3988-3966	en_US
dc.contributor.author	Zhang, N https://orcid.org/0000-0001-6408-0044	en_US
dc.contributor.author	Zhu, B	en_US
dc.date.issued	2013-01-01	en_US
dc.identifier.citation	SAE Technical Papers, 2013, 2	en_US
dc.identifier.issn	0148-7191	en_US
dc.identifier.uri	http://hdl.handle.net/10453/26712
dc.description.abstract	This paper proposes an approach to optimize the economy performance of a two-speed electric vehicle (EV) by combining gear shifting schedule design and gear ratios selection. Mathematic models for the two-speed EV subsystems are developed, including those of the battery module, electric machine, the driver, transmission and vehicle. Then a procedure for obtaining the optimal gear ratio pairs and corresponding shift schedule for the two-speed EV is presented in detail. The optimized EV powertrain parameters can not only ensure that basic requirements in dynamic performance are achieved, but realize the optimal economic performance of the EV as well. In order to investigate the effectiveness of the proposed method for EV design, simulations based on the developed powertrain model is conducted using different test driving cycles, including NEDC and constant speed. Results of these simulations validate the effectiveness of the proposed optimization method. Copyright © 2013 SAE International.	en_US
dc.relation.ispartof	SAE Technical Papers	en_US
dc.relation.isbasedon	10.4271/2013-01-1477	en_US
dc.title	Performance improvement of a two speed EV through combined gear ratio and shift schedule optimization	en_US
dc.type	Conference Proceeding
utslib.citation.volume	2	en_US
utslib.for	090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)	en_US
utslib.for	0902 Automotive Engineering	en_US
utslib.for	0910 Manufacturing Engineering	en_US
dc.location.activity	Detroit, Michigan	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	2	en_US

Abstract:

This paper proposes an approach to optimize the economy performance of a two-speed electric vehicle (EV) by combining gear shifting schedule design and gear ratios selection. Mathematic models for the two-speed EV subsystems are developed, including those of the battery module, electric machine, the driver, transmission and vehicle. Then a procedure for obtaining the optimal gear ratio pairs and corresponding shift schedule for the two-speed EV is presented in detail. The optimized EV powertrain parameters can not only ensure that basic requirements in dynamic performance are achieved, but realize the optimal economic performance of the EV as well. In order to investigate the effectiveness of the proposed method for EV design, simulations based on the developed powertrain model is conducted using different test driving cycles, including NEDC and constant speed. Results of these simulations validate the effectiveness of the proposed optimization method. Copyright © 2013 SAE International.

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http://hdl.handle.net/10453/26712