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Energies 2018, 11(1), 247;

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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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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