Influence of providing tractor units with oil products on the productivity of human-machine systems in crop production

Providing an agricultural producer with petrol, oil fuels and lubricants (POL) is a very important, multi-stage and multivariate process. The timeliness of POL delivery depends on the schedule compliance of agricultural work and the performance of tractor units. Therefore, it can be concluded that providing with oil products directly affects the performance of human-machine systems (HMS).The introduction to the article considers a generalized model of crop production, where we have defined the subsystem «external environment» and the structure of the model of the external environment in the agro-engineering sphere, thanks to which we have detected the block «fuel and oil supply». There has been described the role of providing tractor units with oil products and the goals that we pursued while conducting these studies. The article presents three main directions of research on how to provide an agricultural producer with fuel and lubricants: general structure of the fuel supply system, farm oil regeneration system, influence of the service life of technical means on the fuel consumption. The first direction of research considers «a general structure of the oil products supply system», which has a three-tier model of oil products supply. The second direction of research deals with a «general scheme of the system for oil regeneration and reused oils», as well as gives an example of an installation for the used oils regeneration. The third direction of research presents the dependences characterizing the increase in the fuel and lubricants consumption on the wear of engine components and assemblies, power, operating time and forward speed of the units. There has been presented an informative table «Technical and operational parameters of the tractor unit, depending on the operating time of the tractor», which makes it clear how much fuel consumption increases depending on the operational parameters of the tractor. The result of calculations is shown in form of graphs «Comparative dependence of power and fuel consumption on the total operating time of the tractor K-701». There have been calculated the values and have been tabulated the velocities to determine the forward speed of the tractor unit K-701 + PL-9-35, there has been also given a graphic representation of the forward speed of the tractor unit. Based on this, there have formulated and tabulated the main influences of providing tractor units with oil products on the productivity of the HMS.