Abstract

Standardized driving cycles (e.g. WLTC) define speed points for a straight driving road load calculation in simulation and on roller chassis dynamometers. Within real rides on public roads, straight driving road loads are increased by curve resistances during curve driving. Furthermore, for curve driving the wheels has to be steered, so that the steering system needs to be actuated to overcome the necessary steering torque at the steered wheels. This extra loads increase the energy or fuel consumption and the resulting emis-sions especially during rides on curvy country or urban roads. Therefore, curve loads have to be considered when developing new inner city vehicles for delivery, public transport or individuals. Trends like boom of online trade with increased parcel deliv-ery, urbanization, expansion and modernization (electrification) of local road bound public transport and last but not least emission standards increase the need to consider curve loads within the vehicle development process. Within this publication the authors present the theory on consumption relevant curve loads. This loads have been simulated on the full vehicle test bench VEL (Vehicle in the Loop) of the Institute of Vehicle System Technology at the Karlsruhe Institute of Technology (KIT). Selected test results on the influence of curve loads performed on the VEL are finally presented.