The choice of the most profitable mode of operation of tractor engines always worries the operators of agricultural machinery. When completing machine-tractor aggregates (MTA), the question becomes how to choose a farm machine to a tractor in order to obtain higher productivity of the unit with less fuel consumption and ensure the reliable operation of the tractor engine. Research by many scientists has shown a lot of criteria or methods for determining the load level of tractor engines when performing fieldwork. They recommended the coefficient of permissible and possible overload of the engine, the displacement of the torque of the engine, the degree of irregularity of the traction resistance of the unit, the average engine power at the given time, the engine speed, nominal, idling speed and the minimum, the mean square deviation of the moments of resistance of the unit. Practically these indicators to determine for the optimal mode of operation of the MTA on various agricultural work is difficult for the mechanics. Modern tractors have powerful engines, with a large number of revolutions of the crankshaft. The owners of the technology are most concerned about the performance and cost-effectiveness of the ATS, so that each engine power in kW brings more benefits. Therefore, we recommend the minimum specific energy consumption as an optimization criterion (ATA operation mode selection), this is the minimum ratio of the tractor's nominal tractor power to the unit's performance, which depends on the width of the unit's capture and speed of its movement. The less this relationship, the more profitable and more economical it will be to use the work of the MTA. And the owner of the machinery will always know what kind of benefits he brings to each kilowatt tractor engine power.
A Method for Selecting Enterprise’s Logistics Operation Mode Based on Ballou Model
