Scientific Journal of KubSAU

In agriculture the issue of enhancing the efficiency of operation of internal combustion engines (ICE), reducing the costs of maintenance (TO) and repairing (TP) fuel supply apparatus (TA) using the improvement of methods and means of diagnosis is a topical in connection with the aging rolling stock farming and lack of investment. Analysis of the known TA diesel engine vehicles systems showed that the most widespread system is the divided type with multiplunger high pressure fuel pump (fuel pump), while the methods of its diagnosing are laborious, they require partial disassembly and have insufficient accuracy. The mathematical models that characterize the work of a high-pressure fuel pump (fuel pump) use a large number of parameters that significantly affect the quality of dynamics of the change of pressure values of diesel fuel. However, in the materials of previously published articles there were no issues considered assessing the extent of the quantitative impact, performance and features change in the sensitivity settings of the mathematical models on the simulation results, there are no recommendations on the degree of sensitivity and importance of each of the parameters. For a more accurate diagnosis of the fuel supply apparatus of a diesel engine it is advisable to use several methods of diagnosing. The article substantiates development of a mathematical model of a high-pressure fuel pump based on the analysis of modern methods of diagnosing of fuel equipment for autotractor diesel engines

Material and technical resources form a large part of the costs in agricultural production and determine the level of intensity of agriculture, productivity and competitiveness of the industry. The most important role in agricultural production is played by transport operation, from productivity and quality of which directly depends the volume and the grade of final products. More preferable is tractor transport, particularly for on-farm transport, taking into account the impact of navigation systems on the ground. Continuous growth in the saturation of tractors carried out around the world, improves the performance of tractor transport aggregate by increasing their capacity and speed, either on the road or in the field. However, if you increase the saturation of tractors, it encounters problems related to the deterioration of the controllability of the tractor and transport unit. The reduced controllability leads to an increase of damage to transported agricultural products owing to increased oscillatory processes in the system of "road – trailer – tractor – operator" when driving on-farm trails, deteriorating the smoothness and braking properties. Especially sharp these questions relate to transportation of easy-to-damage agricultural products at farm transportation. The feature of data traffic lies in the sharp drop in grade products (products receive numerous mechanical damages, deteriorating its quality, and lose marketability and accordingly reduced its cost). Influence on fruit and vegetable products of unfavorable factors can lead not only to a dramatic loss of quality at the time of transportation, but also reduce the resistance during further storage. To solve the problems emerging when increasing the saturation of tractors, we have proposed devices, allowing reducing negative impact on the production of elevated oscillatory processes, to increase the permeability and straightness of movement of tractor-transport unit

Potato is cultivated in 130 countries on an area of over 18 million hectares; it annually gives more than 300 million tons of tubers. The share of the Russian Federation accounts is about 11% ... 14% of total production. The resulting potatoes consumed in food, animal feed, technical purposes, seed fund. According to the Ministry of agriculture of Russia, the largest number of potatoes in our country (89 %) is produced in peasant farms and personal farms of citizens, the area of cultivation of which make up about 2.7 million hectares. At such farms for the harvest, they use mainly potatodiggers, followed by selection of crops manually. The use of diggers in small areas of planting is more costefficiently in relation to the harvesting combine. In addition, the parameters requested for ATT to damage potatoes when harvesting with the diggers (3%) are higher than during harvesting by combine harvester (5%). As practice shows, for the use of cleaning units, even under optimal harvesting conditions in the hopper of the combine, there are soil and vegetable impurities. There are many different devices intended to localize the problem. Based on the foregoing, we can conclude that it is necessary to pay considerable attention to the quality of work of excavating working bodies, because it affects the productivity of the functioning of the whole machine. Currently, there are widespread potato aggregates with the receiving part, equipped with side disks, spaced along the edges of the plowshares. The disks cut off the raised layer of soil from between the rows. This entails improving the performance of the potato harvester. The most efficient and economical from the point of view of energy consumption, is the work of passive disks with hooks. The quality of potato harvesters depends on the design and performance of excavating bodies. The proposed design solution for an excavating body increases the productivity of harvesting machines