Mittsel M. Influence of special zones of work hydraulic transmission on the technical and economic parameters of wheeled tractors with continuously variable hydrovolumetric mechanical transmissions

Workflows hydrostatic-mechanical transmission tractor units on the basis of wheel tractors. Increased technical and economic indicators of tractors equipped with hydrostatic-mechanical transmission with differential "output", by placing agro speeds in specific areas of work hydrostatic transmission. Methods of mathematical analysis, allowing to form a relationship kinematic and power parameters of hydrostatic-mechanical transmissions, and evaluate the main technical and economic indicators in the tractor unit with agricultural tools; differential and integral calculus for modeling dynamic processes in motion the wheel of the tractor with hydrostatic-mechanical transmissions; transmission matrix analysis; methods of experimental research with the involvement of high-precision sensors and modern electronic recording equipment. Calculations and experimental data processing is implemented in the software package MathCad and MATLAB Simulink. Development of a device for the integrated analysis of the processes in specific areas and identifying areas of high performance hydrostatic-mechanical transmission. It was determined that for the hydrostatic-mechanical transmission-type differential on the "exit" expedient placement maximum ICE operational capacity in specific areas, as do special zones must be in agronomic speed range performance of energy-intensive agricultural operations with the real slip, which will provide high efficiency hydrostatic -mechanical transmissions. The technique of experimental research hydrostatic-mechanical transmission allowing for the operation of hydrostatic transmission in specific areas. For the first time the regularities of changes in volumetric, mechanical and total losses in the hydrostatic transmission on the different modes of load hydrostatic-mechanical transmission with differential "output" in view of features hydrostatic transmission works in special zones, enables the definition of high-efficiency transmission zones. For the first time an approach for the design of advanced hydrostatic-mechanical transmission with differential "output", which allows to achieve maximum transmission efficiency and productivity of the machine and tractor unit by forming specific areas of work within the hydrostatic transmission speed of the main farming operations. It has continued to develop a mathematical model of hydrostatic transmission, which differs from the current definition of the boundaries of special zones and allows you to explore workflows directly at her. The recommendations for the design of advanced hydrostatic-mechanical transmission adopted for use in design practice company "HTZ" and in the educational process of the department automobile and tractor NTU "KPI". Automobile and Tractor.