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Energies 2018, 11(1), 247; doi:10.3390/en11010247

Reducing Energy Demand Using Wheel-Individual Electric Drives to Substitute EPS-Systems

Schaeffler Technologies AG & Co., KG, Rintheimer Querallee 2, 76131 Karlsruhe, Germany
Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Kaiserstr. 12, 76131 Karlsruhe, Germany
Author to whom correspondence should be addressed.
Received: 18 December 2017 / Revised: 11 January 2018 / Accepted: 16 January 2018 / Published: 20 January 2018
(This article belongs to the Special Issue Methods to Improve Energy Use in Road Vehicles)
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The energy demand of vehicles is influenced, not only by the drive systems, but also by a number of add-on systems. Electric vehicles must satisfy this energy demand completely from the battery. Hence, the use of power steering systems directly result in a range reduction. The “e2-Lenk” joint project funded by the German Federal Ministry of Education and Research (BMBF) involves a novel steering concept for electric vehicles to integrate the function of steering assistance into the drive-train. Specific distribution of driving torque at the steered axle allows the steering wheel torque to be influenced to support the steering force. This provides a potential for complete substitution of conventional power steering systems and reduces the vehicle’s energy demand. This paper shows the potential of wheel-individual drives influencing the driver’s steering torque using a control technique based on classical EPS control plans. Compared to conventional power-assisted steering systems, a reduced energy demand becomes evident over a wide range of operating conditions. View Full-Text
Keywords: torque vectoring; power steering; electric vehicles; energy demand; powertrain; simulation torque vectoring; power steering; electric vehicles; energy demand; powertrain; simulation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Römer, J.; Kautzmann, P.; Frey, M.; Gauterin, F. Reducing Energy Demand Using Wheel-Individual Electric Drives to Substitute EPS-Systems. Energies 2018, 11, 247.

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