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

Jürgen Römer, Philipp Kautzmann, Michael Frey and Frank Gauterin
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Jürgen Römer: Schaeffler Technologies AG & Co., KG, Rintheimer Querallee 2, 76131 Karlsruhe, Germany
Philipp Kautzmann: Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Kaiserstr. 12, 76131 Karlsruhe, Germany
Michael Frey: Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Kaiserstr. 12, 76131 Karlsruhe, Germany
Frank Gauterin: Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Kaiserstr. 12, 76131 Karlsruhe, Germany

Energies, 2018, vol. 11, issue 1, 1-11

Abstract: 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 “e 2 -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.

Keywords: torque vectoring; power steering; electric vehicles; energy demand; powertrain; simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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