This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Full-System Approach to Maximize Energy Efficiency of a Wheel Bearing
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 05, 2020 by SAE International in United States
Annotation ability available
Environmental sustainability is morphing Automotive technical development strategies and driving the evolution of vehicles with a speed and a strength hardly foreseeable a decade ago. The entire vehicle architecture is impacted, and energy efficiency becomes one of the most important parameters to reach goals, which are now not only market demands, but also based on regulatory standards with penalty consequences. Therefore, rolling drag from all bearings in multiple rotating parts of the vehicle needs to be reduced; wheel bearings are among the biggest in size regardless of the powertrain architecture (ICE, Hybrid, BEV) and have a significant impact.
The design of wheel bearings is a complex balance between features influencing durability, robustness, vehicle dynamics, and, of course, energy efficiency. Whereas the driving efficiency and durability have always been main drivers for wheel hub designs, the upcoming development of BEVs, which use large battery packs, has introduced additional needs for compactness and increased carrying capacity. The ability to extend the range of such electric powered vehicles is much more stringent than for ICEs and Hybrids, and, they still require weight and friction reductions.
The keys to an optimum design are:
CitationRe, P., Lamboglia, F., and Missiaggia, G., "A Full-System Approach to Maximize Energy Efficiency of a Wheel Bearing," SAE Technical Paper 2020-01-1631, 2020, https://doi.org/10.4271/2020-01-1631.
- European Commission , “Internal Market, Industry, Entrepreneurship and SMEs—Environmental Aspects of the Automotive Industry,” https://ec.europa.eu/growth/sectors/automotive/environment-protection_entrepreneurship and SMEs
- Environmetal Protection Agency - Office of Transportation and Air Quality , “EPA and NHTSA Set Standards to Reduce Greenhouse Gases and Improve Fuel Economy for Model Years 2017-2025 Cars and Light Trucks,” Regulatory Announcement EPA-420-F-12-051, Aug. 2012.
- Shevket, C., Ciulla, L., and Re, P. , “Development of Low Friction and Light Weight Wheel Hub Units to Reduce both the Brake Corner Unsprung Mass and Vehicle CO2 Emission (Part 1-Friction),” SAE Technical Paper 2010-01-1706, 2010, doi:10.4271/2010-01-1706.
- Sguotti, L., Olivieri, D., and Bosco, D. , “SKF Contributes to Climate Change Mitigation with Friction Optimized Wheel Bearings,” SAE Int. J. Passeng. Cars - Mech. Syst. 9(3):1270-1278, 2016, doi:10.4271/2016-01-1959.