This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Research on Factors to Influence Coasting Resistance for Electric Vehicles
Technical Paper
2020-01-1068
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The research on coasting resistance is vital to electric vehicles, since the smaller the coasting resistance, the longer the coast-down distance. Vehicle coast resistance consists of rolling resistance, vehicle inner resistance and the aerodynamic drag. The vehicle inner resistance is mainly caused by driveline’s friction loss and oil splash loss. The rolling resistance is decided by tire resistance coefficient, which is influenced by tires and road conditions. And the aerodynamic drag is affected by vehicle’s shape and air. In this paper, four factors including tire pressure, road surface condition, atmosphere temperature, and recirculation on or off are examined. Experimental tests have been conducted on three different vehicles: one subcompact sedan, one compact sedan and one subcompact SUV. Then experimental results have been imported to simulation model to investigate the corresponding influence on NEDC range. The outcome shows that, when the tire pressure is 20% less, the average coasting resistance is increased by 1% to 3% depending on vehicle types, which indicates a decrease in NEDC range by around 2%. And with atmosphere temperature in 6 to 32°C range, the resistance is decreased by 0.48% for every 1°C increased. On wet road surface, the average coasting resistance is increased by 10% - 20%, which could decrease the NEDC range by 6% to 12%. As for the recirculation on or off, one vehicle with inside air recirculation on experiences an average 6% coasting resistance reduction. Other two vehicles have similar coasting resistances whether the recirculation is on or off. The overall results give a better understanding on how the coasting resistance is influenced by various factors and can instruct future vehicle’s low coasting resistance development. More factors such as brake calipers, tire size, and other corresponding influences will be studied in future tests.
Recommended Content
Authors
- Guan Gong - Chongqing Changan New Energy Auto Co., Ltd.
- Chen Zhao - Chongqing Changan New Energy Auto Co., Ltd.
- Xiaohang Zhou - Chongqing Changan New Energy Auto Co., Ltd.
- Chenghao Deng - Chongqing Changan New Energy Auto Co., Ltd.
- Cheng Yu - Chongqing Changan New Energy Auto Co., Ltd.
- Fuyong Yu - Chongqing Changan New Energy Auto Co., Ltd.
- Anjian Zhou - Chongqing Changan New Energy Auto Co., Ltd.
- Yong Ren - Changan Mazda Auto Company
- Hanli Jiang - Chongqing University
Topic
Citation
Gong, G., Zhao, C., Zhou, X., Deng, C. et al., "Research on Factors to Influence Coasting Resistance for Electric Vehicles," SAE Technical Paper 2020-01-1068, 2020, https://doi.org/10.4271/2020-01-1068.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Beuving , E. , Jonghe , D.E. , Goos , T. , Lindahl , T. , and Stawiarski , A. Fuel Efficiency of Road Pavements Proceedings of the 3rd Eurasphalt and Eurobitume Congress Held Vienna 2004 983 992
- Lynn , D.K. , McCormick , J.B. , Bobbett , R.E. , Derouin , C.R. , Nachamkin , J. , and Kerwin , W. Determination of Vehicle Rolling Resistance and Aerodynamic Drag 29th IEEE Vehicular Technology Conference, IEEE 1979 292 295 10.1109/VTC.1979.1622705
- White , R.A. and Korst , H.H. The Determination of Vehicle Drag Contributions from Coast-Down Tests SAE Technical Paper 720099 1972 https://doi.org/10.4271/720099
- Roussillon , G. Contribution to Accurate Measurement of Aerodynamic Drag on a Moving Vehicle from Coast-Down Tests and Determination of Actual Rolling Resistance Journal of Wind Engineering and Industrial Aerodynamics 9 1-2 33 48 1981 10.1016/0167-6105(81)90076-3
- Petrushov , V.A. Improvement in Vehicle Aerodynamic Drag and Rolling Resistance Determination from Coast-Down Tests Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 212 5 369 380 1998 10.1243/0954407981526037
- Dayman , B. Tire Rolling Resistance Measurements From Coast-Down Tests SAE Technical Paper 760153 1976 https://doi.org/10.4271/760153
- Nielsen , L. and Sandberg , T. A New Model for Rolling Resistance of Pneumatic Tires SAE Technical Paper 2002-01-1200 2002 https://doi.org/10.4271/2002-01-1200
- Walter , J.D. and Conant , F.S. Energy Losses in Tires Tire Science and Technology 2 4 235 260 1974 10.2346/1.2167188
- DeRaad , L.W. The Influence of Road Surface Texture on Tire Rolling Resistance SAE Technical Paper 780257 1978 https://doi.org/10.4271/780257
- Laganier , R. and Lucas , J. The Influence of Pavement Evenness and Macrotexture on Fuel Consumption Meyer , W. , Reichert , J. Surface Characteristics of Roadways: International Research and Technologies West Conshohocken, PA ASTM International 1990 454 459 10.1520/STP23381S 978-0-8031-5110-9
- Ministry of Ecology and Environment of China Dec. 2016