Methods of Measuring Regenerative Braking Efficiency in a Test Cycle

Features
Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
In Hybrid Electric Vehicles, Regenerative Braking is an essential function to convert vehicle kinetic energy into electrical energy, which charges the battery during a braking event to make a portion of captured kinetic energy available for use later. In comparison, conventional vehicles use friction brakes only and kinetic energy is dissipated as heat and not made available for later use. This paper introduces methods of evaluating Regenerative Braking Efficiency, including multiple efficiency definitions that lead to different attributes. The paper proposes regenerative brake event definitions during the FTP cycle and how they are used for control strategy and calibration updates. Also, we apply the efficiency metrics to four different vehicles from four automotive manufacturers for comparison. The paper presents a sample comparison result. Finally, we compare our efficiency metrics with the Environmental Protection Agency (U.S.EPA) official Brake Energy Recovery efficiency evaluation process.
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DOI
https://doi.org/10.4271/2017-01-1168
Pages
10
Citation
Liu, Z., Ortmann, W., Nefcy, B., Colvin, D. et al., "Methods of Measuring Regenerative Braking Efficiency in a Test Cycle," Alternative Powertrains 6(1):103-112, 2017, https://doi.org/10.4271/2017-01-1168.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-1168
Content Type
Journal Article
Language
English