Internal Contour of a Tractor Tyre on Firm and Soft Ground

Abstract

The prediction of the forces and moments which a tyre can transmit to the ground requires precise knowledge of the contact area. At Hohenheim University, a laser measuring set was integrated into the existing single wheel tester. A laser sensor in the wheel allows the distance to the internal contour in the tread and in the sidewall area to be measured. Initial results show a significant deformation of the tyre even outside the contact area, which are not taken into account by existing models for contact area calculation.