Influence of Misuse in Tyres on Driving Dynamics During Emergency Braking

More information

Main author

Olga Nikolsky Liad; Avner Rosengarten; Uzi Raz

Co-Authors

-

Type of media

PDF

Publication type

Lecture

Publication year

2015

Publisher

24. EVU Conference, Edinburgh

Citation

-

edinburg2015 24bThis work evaluates the influence of tyre parameters on the dynamics of vehicles. This paper investigates the effect of the following tyre parameters: low air pressure, different tyre speed limits and old tyres. The braking efficiency and stability during emergency braking were tested with different tyres assembled on the same axle.

These evaluations are intended to help in the reconstruction of accidents where problems with the stability of a vehicle were apparent but no visual tyre problem was found.

Vehicle and tyre manufactures are working on the improvement of vehicle dynamics and safety. But, due to maintenance cost, a large volume of vehicles use the road with faulty tyres, causing conditions that significantly change the properties of the dynamics and stability of these vehicles.

In this evaluation five different vehicles where used. The vehicles were tested and the values of braking and road holding coefficient were measured on three different road surfaces and on three different dynamometers. The examination was repeated as follows:

  1. Each of the vehicles with the same tyres but with air pressures of: 32 psi, 25 psi, 20 psi and 15 psi.
  2. The same vehicles and the same above conditions, but with tyres of different ages mounted on the same axle.
  3. The same vehicles and the same above conditions, but with tyres of different speed limit mounted on the same axle.

edinburg2015 24a

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