Potential analysis of cold braking distance performance - adaptation of the ABS to the tyre temperature

Inhalt:
This study evaluates the braking distance potential to be exploited when adapting an antilock braking system (ABS) to cold tyre conditions. The stopping distance performance of vehicles is of outstanding importance in vehicle development. In this context, the introduction of the ABS represents a milestone in driving safety. But changing environmental conditions are still a major challenge for ABS systems today. In particular, tyre properties can change significantly due to varying tyre-temperatures. In this paper, the focus is on the adaptation of the pre-control phase of an ABS control to cold tyre conditions. Therefore, braking tests are carried out under defined test conditions with three different tyre sets and with a test vehicle having a tunable ABS-control unit. In addition to the stopping distances and the mean decelerations of the vehicle, wheel-specific parameters are also used as evaluation criteria. As the results demonstrate, averaged over the first three cold braking tests of a series, the braking distance can be improved by at least half a meter to over a meter. Whereby the very first cold braking shows the greatest potential for each tyre variant.