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Evaluation of the energy efficiency of electric vehicle drivetrains under urban operating conditions
Abstract
In electric vehicles, as in hybrids vehicles, a very important factor affecting the energy efficiency of the powertrain is the ability to use the regenerative braking energy. Depending on the settings available in electric vehicles, the driver can choose different modes of operation: switch off the regenerative braking mode altogether, select the intensity of regenerative braking, or leave the control system in automatic mode. The last mode is often the only one available on eclectic vehicles, so the driver cannot decide whether to switch off or increase intensity of the regenerative braking. This paper presents a new method for evaluating the energy efficiency of electric vehicle powertrains under urban operating conditions. The presented method uses a procedure for mapping the operating conditions allowing to determine the reference level of energy consumption in relation to those recorded during the identification tests. Identification tests were carried out in the Tri-City area using electric vehicles of different purposes and operating parameters. Performed tests allowed to evaluate the regenerative braking efficiency of tested vehicle, which varies over a relatively wide range, for vehicle A from 33 to 77%, for vehicle B from 27 to 55% and for vehicle C from 36 to 58%. It can be concluded that one of the main factors determining the regenerative braking efficiency is the level of state of charge of the accumulator and the management algorithm used by the vehicle for controlling this parameter.
Citations
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Authors (2)
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Tomasz Gawłas
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.19206/CE-169492
- License
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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Combustion Engines
no. 195,
pages 28 - 34,
ISSN: 2300-9896 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Kropiwnicki J., Gawłas T.: Evaluation of the energy efficiency of electric vehicle drivetrains under urban operating conditions// Combustion Engines -Vol. 195,iss. 4 (2023), s.28-34
- DOI:
- Digital Object Identifier (open in new tab) 10.19206/ce-169492
- Sources of funding:
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- COST_FREE
- Verified by:
- Gdańsk University of Technology
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