System for Changing the Radial Response on Car Wheels

The paper deals with the possibilities of change in adhesion force for experimental measurement on a road vehicle. The article deals with the ways in which the road vehicle can be brought to skid limit while driving at a safe speed. These are two newly designed systems (SlideWheel and Alternative SkidCar) to complement the experimental car. Both systems allow for the reduction of the adhesion force on car wheels, depending on the reduction of radial force transmitted by the car wheel. Their main difference is in the spatial arrangement and in the method of attachment to a car. The wheel units are mounted under the axles in case of SlideWheel and attached to the experimental car body via a subframe in case of Alternative SkidCar. We implemented an objective finding of their influence on the quantities describing the movement of the car in the two systems designed by the authors. Mutual comparison was made during experimental measurement during a test drive in the form of driving in a circle at a constant steering wheel turning angle. Experimental measurements were made with 50% of the radial response on car wheels. It is clear from the measured results that both systems met expectations and can be used to bring the car to the skid limit at a safe speed. Both systems help to induce any type of car skidding. The advantage of the SlideWheel system compared to Alternative SkidCar is its lower weight; the disadvantage is the size of the support wheels. The paper is focused on objective comparison of ASC and SW in terms of effect on the experimental car’s behaviour.