In the above equation we assume that Drf
d and Drr
dare
deformations of front and rear tires. The Eq. (5) shows that
a 4WD tractor, working with front-mounted loader, will be
subjected to slip/skid of wheels when deformations of its
front and rear tires do not correspond to the specified proportions.
Tire deformation depends on the vertical wheel loads
and inflation pressure of the tires.
For the study of how vertical loads and tire pressures
affected slip/skid of driving wheels of 4WD tractor working