From tyre measurements on low µ surface to full vehicle ESC simulations under winter conditions

The testing of the ESC (Electronic Stability Control) on snow and ice is restricted to winter time and special proving ground locations. Due to this fact, tyre models for snow and ice are always under investigation at the Vehicle Dynamics team of the Ford Motor Company. This could help to test the ESC in simulation more independent from the winter season. To achieve this goal, different tyres were measured with a tyre test trailer on a frozen lake in Sweden. From these measurements, Pacejka coefficients for the tyres were identified. Then, full vehicle measurements were done at the same location to validate the identified parameters and to review the quality of the tyre model in full vehicle simulations.