This work aims to analyze a complete hydraulic system of a medium size agricultural tractor, in order to perform an energy dissipation analysis and to suggest possibly alternative configurations and solutions. The fuel consumption and energy dissipation in off road vehicles have in fact become a key feature, given the great attention devoted to the need of reducing pollutant emissions, in order to satisfy the future emission limits. In this work the focus is on the fluid power supply group and the standard architecture of this unit has been compared with an alternative solution, called variable pump margin strategy and compared on the basis of the power consumption to perform the same duty cycle, showing that a relevant percentage of energy may be saved with simple modifications in the hydraulic power generator group.
Keyword: agricultural tractor
A methodological approach has been developed that allows to assess the performance and functional possibilities of systems, assemblies and mechanisms of the agricultural tractor taking part in the formation and implementation of its power potential and, if necessary, to determine requirements for modules with similar purposes by which they could be replaced in order to improve efficiency in the operation of а tractor model and machine-tractor combinations formed on its basis.
An example of practical application of the methodological approach for improving the utilization of power potential of an agricultural tractor by optimizing its ballast is presented in the article, too.