Tire properties play an important role in two-wheeled vehicle dynamics. Hence, tire properties have to be measured both to compare objectively the performances of different tires and to develop tire models that are necessary for multi-body simulation. The measurement of motorcycle tires requires particular testing facilities because the camber angle (which is the angle between the symmetry plane of the tire and the plane perpendicular to the road surface) reaches large values (>50°) and has a large influence on the forces and torques exerted by the road on the tire. In particular in many actual conditions the lateral force due to camber (camber force) may be larger than the sideslip force. The component of the yaw moment due to camber (twisting torque) does not tend to align and in many conditions may be larger than the self-aligning moment due to tire trail.
Motorcycle tire testing on a rotating disc machine
COSSALTER, VITTORE;DORIA, ALBERTO;
2002
Abstract
Tire properties play an important role in two-wheeled vehicle dynamics. Hence, tire properties have to be measured both to compare objectively the performances of different tires and to develop tire models that are necessary for multi-body simulation. The measurement of motorcycle tires requires particular testing facilities because the camber angle (which is the angle between the symmetry plane of the tire and the plane perpendicular to the road surface) reaches large values (>50°) and has a large influence on the forces and torques exerted by the road on the tire. In particular in many actual conditions the lateral force due to camber (camber force) may be larger than the sideslip force. The component of the yaw moment due to camber (twisting torque) does not tend to align and in many conditions may be larger than the self-aligning moment due to tire trail.
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