The driving force of the tractor

It is the horizontal reaction force of the road facing the drive wheels. Therefore, the magnitude of the drive torque Mk transmitted by the internal combustion engine to the drive wheel through the transmission system indicates that the driving force Pk of the tractor is also greater. But since Mk is determined by the power of the internal combustion engine, Pk is also limited by the power of the internal combustion engine. At the same time, Pk is limited by soil conditions and cannot be increased indefinitely, because when the reaction force of the soil, that is, the driving force Pk increases to a certain extent, the soil is destroyed, the driving wheel is seriously slippery, and the driving force Pk can no longer be increased. We call the maximum reaction force that the soil can produce on the drive wheel "adhesion". It can be seen that the maximum value of the driving force Pk is limited by the internal combustion rate in addition to the internal combustion rate, but also limited by the soil adhesion, and cannot be increased indefinitely.