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The performance of machine-tractor units depends on many factors and production conditions, and primarily on the energy intensity of the process. The main indicator of the energy intensity of the process is the traction resistance of the aggregated agricultural machine. The absence of a simple and reliable method for determining this indicator leads to the heterogeneity of the devices used, often manufactured on their own, and this entails different reliability of the results. Therefore, the development of methods and means of determining the traction resistance of agricultural machines, acceptable not only for testing stations, but also for specific farms, is very relevant and of considerable interest. In this paper, we propose an operational method for determining the traction resistance of mounted agricultural machines, based on the analysis of parameters of transient acceleration modes of machine-tractor units with an instantaneous increase in fuel flow. The aim of the work is to develop and complete the measuring and computing complex, as well as to conduct experimental studies to determine the values of acceleration of the tractor and its reduced weight on one of the increased gears, allowing to implement this method of determining the resistance of agricultural machines. For the realization of left targets was developed and assembled measuring and computing complex determine the dynamic characteristics of machine-tractor units, through which with the aid of patented techniques on the base station «Kislyakovskaya» Kushchevskaya district of Krasnodar region was carried out experimental studies to determine the acceleration values of the tractor MTZ-80 and its given mass in one of the elevated gear. The obtained results allow to implement the proposed method for determining the traction resistance of agricultural machinery.

One of the most important ways to improve the efficiency of agricultural production is to improve methods and means of determining the main indicators of tractors. Their performance directly affects the efficiency, economy and environmental safety of machine and tractor units. To assess the traction-dynamic and fuel-economic indicators of the tractor in various modes and soil backgrounds, its traction tests are performed. However, traction tests require expensive equipment, as well as a significant cost of funds and time to prepare and conduct it, which determines their performance only in conditions of machine testing stations. In this regard, the improvement of methods and means for determining the traction-dynamic and fuel-economic indicators of tractors that are acceptable not only for machine testing stations, but also for specific farms, is a very pressing problem and is of considerable interest. The aim of the work is to improve the methods and means for determining the traction-dynamic and fuel-economic indicators of tractors, by justifying and developing a technique for determining the reduced mass of the tractor, which makes it possible to reduce the laboriousness of measurements under operating conditions. As the object of research in this paper, the process of determining the traction-dynamic and fuel-economic parameters of tractors in operating conditions was chosen. The subject of the study in this paper was the establishment of regularities inherent in this process. The proposed method for determining the traction-dynamic and fuel-economic indicators of tractors and the measuring and computing complex that implements it, make it possible to obtain a traction characteristic (the dependence of speed, slippage, traction, hour and specific fuel consumption on the load on different transmissions on a given soil background) in operational conditions, ensuring a reduction in time and cost.

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