International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

This article offers the new procedure of a general-purpose tractor mass and power calculation which is oriented on performance of certain kinds technological operations (sowing, plowing). Optimality criterions are total energy expenses considering yield energy which was lost because of wrong chosen tractor parameters. By multiple parameter optimization of a tractor parameters and the unit it is found out that there are optimum values of a tractor weight and power during the sowing and plowing, which do not coincide on size and remain stable at considerable change of environmental factors (properties of soil, parameters of field). Weight and power of a multi-purpose tractor providing the minimum total energy expenses during the complex of operations were indicated.