In February 1996 the EC started the TIME Project (TIre MEasurements). The aim of the project is the development of a common tyre test procedure that will be reliable and consistent with realistic driving conditions. The facts which led 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 nonconformity of test bench results with vehicle tests on the road. The reasons are found in the large differences 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 five workpackages. First, the differences 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 differences 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 Workpackage 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.
EC research project TIME - Tire measurements, forces and moments
Das EC-Forschungsprojekt TIME - Reifenmessungen, Kräfte, Momente. Arbeitspaket 2: Untersuchung der die Ergebnisse der Reifenprüfung beeinflussenden Parameter
1998
8 Seiten, 15 Bilder, 2 Tabellen, 4 Quellen
Conference paper
English
EC-Research Project TIME -Tire Measurements, Forces and Moments-
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