DETERMINATION OF DRIVE PERFORMANCE FOR TRACTORS EQUIPPED WITH SUPPLEMENTARY HYDROSTATIC TRANSMISSIONS

摘要

The paper present the traction calculus of the tractor equipped with an additional transmission — the hydrostatic transmission. The variation of the hydraulically parameters — the working liquid pressure, the hydraulic pump delivery — modify the parameters of the hydraulic motor — the rotative speed of the motor axle, the motor torque - and, also, the traction performances of the tractor. Also wheeled traction performances are influenced by constructive and functional parameters of tractor tires that parameters related to interaction with the ground wheels.