Kozhushko A. Improving technical and economic indicators of wheeled tractors with continuously variable transmission by a rational change of regulation hydromachines parameters during acceleration

The process of overclocking the machine-tractor unit with a hydrovolumetric mechanical transmission in the performance of "plowing" of the operation. Increasing the efficiency and effectiveness of the machine and tractor units with hydrostatic-mechanical transmissions when the process step "plowing" - due to the formation of rational laws change control parameters of hydraulic hydrostatic transmission in the process of entering the technological regime. Differential and integral calculus for the calculation of dynamic processes in motion the wheel of the tractor with HVMT, statistical analysis to determine the error by comparing the theoretical and experimental results, the theory of optimization for finding rational laws change regulation of hydraulic parameters of the GOP during acceleration. Implementation of numerical calculations performed on the basis of MATLAB software package. Recommendations regarding the selection of rational law change regulation of hydraulic parameters, which can be used by farmers to improve the technical and economic indicators of tractors. Prevailing approaches can be used in the analysis of companies promising HVMT as in the design phase and during the pilot study HVMT composed wheeled tractor during acceleration. For the first time established the relationship between the design parameters, the laws change regulation of hydraulic parameters of the GOP and the change of power, of kinematic and power parameters HVMT while entering the technological regime, namely the displacement of hydraulic motors and pressure drop in the GOP, the power of the internal combustion engine and transmission efficiency. The first time the relationship between changes in the laws of hydraulic GOP control parameters and technical and economic indicators MTA with HVMT while entering the technological regime, namely the application of the law change regulation of hydraulic parameters of the GOP, which vary on the rational law, and indicators of efficiency and effectiveness of the AIT. Has continued to develop a mathematical model of the MTA acceleration, which is different from the existing, taking into account features of the process of deepening the plow while executing a transaction "plowing", the possibility of varying the law of change of control of hydraulic parameters of the GOP, as well as a description of interaction of wheels with the support surface. The recommendations on the choice of the optimal control law changes the parameters of hydraulic GOP that are embedded in the design practice PAT "Kharkiv Tractor Plant" and in the educational process of the department automobile and tractor NTU "KPI". Automotive and tractor.