Tire measurements, forces and moments. Workpackage 2: analysis of parameters influencing tyre test results

In February 1996 the EC started the TIME Project (TIre MEasurements). The projects aim is the development of a common test procedure that will be reliable and consistent with realistic driving conditions. The facts which lead to this activity are, on the one hand, the deviations between the force and moment properties of a tyre measured on different test benches, on the other hand the non-conformity of test bench results with vehicle tests on the road. The reasons are found in the large difference in test equipments and measurement procedures. For example, the curvature of the track or the preconditioning influence the tyre characteristics such as cornering stiffness. The TIME Project is divided into 5 workpackages. First, the difference between results obtained with the main European tyre test devices were investigated. In a second part a parameter sensitivity study followed in order to explain the difference between the results obtained with the different devices. In Workpackage 3 the force and moment properties of different types of tyres were determined for three different passenger cars under realistic driving conditions in order to establish a set of reference measurements. These reference measurements were used in Workpackage 4 to fix a new tyre measurement procedure. It will be developed further and validated in Workpackage 5 by measurements with all the different tyre test devices used at the beginning of the project. Results obtained with the new test procedure will be used in vehicle dynamic simulation models in order to judge the procedure's validity and usefulness. This report shows some results of Woikpackage 2 coordinated by the University of Karlsruhe. The influence of track surface, ambient and tread temperature on tyre characteristics such as cornering stiffness or maximum values are handled. Furthermore an estimation of the deviations is given when varying these parameters

Wasserabfluss von unebenen Fahrbahnoberflaechen Zusammenfassender Bericht. Bestimmung eines charakteristischen Querprofils. Wasserfilmdicken in Abhaengigkeit von Neigungen, Unebenheiten und Regenintensitaeten. Ermittlung von Reifenkennlinien fuer veraenderliche Wasserfilmdicken. Simulation des Fahrzeugverhaltens auf unebener, nasser Fahrbahn

Summary in EnglishSIGLEAvailable from TIB Hannover: ZA 4681(728)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman