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Influence of the Tyre Characteristics on the Braking and Steering Performance of Commercial Vehicles
JUMV_SMV_09/21

Authors

Prof. Dr. Egon-Christian von Glasner - Association for Accident Research and Accident Analysis (EVU)

Abstract

According to Section 22 of the German Road Traffic Regulations StVO, the load is to be "stowed and secured in such a manner so that it will not slip, fall over, roll backwards and forwards, be shed or generate avoidable noise even in the event of an emergency stop or if violent manoeuvres are undertaken to avoid an accident. Approved technical practice is also to be observed". Fundamental technical practice for load securing includes the VDI 2700 guidelines. These describe the maximum forces of load mass to be taken into account for load securing during transport.

They stipulate a maximum deceleration of 0.8 g for braking manoeuvres and for moving-off a maximum acceleration of 0.5 g. VDI 2700 states that the maximum lateral acceleration during cornering is 0.5 g.

For the new VDI 2700 guidelines to be developed partially higher demands concerning longitudinal decelerations and lateral accelerations for vehicles up to 7,5t permissible gross vehicle weight are under discussion.

These general assumptions are based on the results of dynamic driving tests. The following will give an overview of the preferred driving dynamic procedures conducted in appropriate tests by the vehicle manufacturers, the results they have obtained and how these can be interpreted as regards load securing.

In the process it will be analysed whether the prevailing acceleration and deceleration figures need to be changed or raised, too. The precondition for this would be greater driving dynamic performances that could be based on an enhancement in the performance of the tyres, braking systems or other driving dynamic assistance systems.

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