Optimal Energy Efficiency, Vehicle Stability and Safety on the OpEneR EV with Electrified Front and Rear Axles

Abstract

This paper relates to the European publicly funded project OpEneR. A central field of research and development in this co-operative project, is energetically optimal operation of the twin electric axle drivetrain of the fully electrified OpEneR prototype cars. Advanced operation strategies for the two 50 kW e-machines are being developed, which consider both energetically optimal propulsion and energetically optimal braking of the vehicle. Both e-machines are used in such a way, that the maximum possible amount of energy can be electrically recovered. However, during electrical recuperation the impact of the brake force distribution on the vehicle’s stability, e.g. during braking on split–μ surfaces, and thus safety, has to be carefully considered. In this work, an advanced co-simulation approach which allows the virtual evaluation of different electrical recuperative braking, frictional braking and related control strategies is described.

OpEneR: Optimal Energy consumption and Recovery based on a system network, grant agreement number 285526, funded by the EC Seventh Framework Programme FP7-2011-ICT-GC [1]