МОДЕЛИРОВАНИЕ РАСХОДА ТОПЛИВА ЗЕРНОУБОРОЧНЫМИ КОМБАЙНАМИ НА УБОРКЕ СОИ

Abstract

The model for estimating the fuel consumption of a combine harvester for harvesting soybeans is considered in the article. The model is based on predicting fuel consumption during the periods of operating time of the combine, during which the engine is running. Such periods include the time spent on the main work, unloading soybean grains, moving to the place of unloading and idle moving. A general equation for the specific fuel consumption of a combine harvester in these periods of time is obtained. A distinctive feature of the model is that it takes into account the impact on fuel consumption of the combine thresher loading in terms of throughput. The model allows predicting the fuel consumption of each combine and for the whole agricultural enterprise. Approbation of the model was carried out in a specific agricultural enterprise of the Tambov region. Based on the model, the required amount of diesel fuel for soybean harvesting was 4901 liters. In fact, 5488 liters were used up. The relative error in forecasting the total fuel consumption for harvesting soybeans for the whole enterprise was 10.7%. The dependences of the specific fuel consumption on the operating speed are obtained using the example of the ACROS 550 and KZS-1218A-1 combine. For both brands of combines, a decrease in specific fuel consumption with an increase in operating speed was revealed. The most significant decrease is observed in the speed range of 2…6 km/h. With an increase in operating speed from 2 km/h to 6 km/h, the specific fuel consumption of combines decreases on average by 1.9 times. The dependences of fuel consumption on the yield and straw content of the harvested crop were obtained. The significance of the influence of these factors and the need to take them into account in the analysis and forecasting of fuel consumption for soybean harvesting are confirmed.