Performance Improvement of a Two Speed EV through Combined Gear Ratio and Shift Schedule Optimization

Paper #:
  • 2013-01-1477

Published:
  • 2013-04-08
Citation:
Zhou, X., Walker, P., Zhang, N., and Zhu, B., "Performance Improvement of a Two Speed EV through Combined Gear Ratio and Shift Schedule Optimization," SAE Technical Paper 2013-01-1477, 2013, https://doi.org/10.4271/2013-01-1477.
Pages:
9
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.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2010-10-19
Article
2017-03-13