A simulation model of 2WD tractor performance

Engine Speed Control System for Improving the Fuel Efficiency of Agricultural Tractors for Plowing Operations

“…The engine torque for the simulation model was based on the PTO performance data of the T623 tractor tested by the OECD test code considering a power transmission efficiency of 90%. The full-load torque with full throttle was expressed as a second order polynomial of engine speed, and the partial-load torque with both full and reduced throttles (θ) by a linear function of engine speed (N e ) [8][9][10][11][12][13]. The engine torque from Equation (1) was used to calculate the tractive force while considering the applied engine load torque, the selected transmission gear ratio, overall transmission efficiency, and draft load using Equations (2) and (3) [9][10][11][12][13].…”

“…The theoretical velocity of the tractor was calculated using Equations (8)-(9) using measured driving wheel slip conditions for 0.1 based on field experiment results. The engine speed for Equation (1) was obtained by multiplying the theoretical velocity and the transmission gear ratio [9][10][11][12][13].…”

Determining the magnitude of traction force on the axes of drive wheels of self-propelled machines

“…Traction force of a tractor is determined by authors of paper [11] based on the balance of forces applied to the drive wheel. Driving torque applied to the wheel is divided into rotational moment of wheel inertia and the driving torque.…”

Design method and theoretical analysis for wheel-hub driving solar tractor

“…Among them, the driving resistance is mainly composed of rolling resistance, aerodynamic drag, acceleration resistance and gradient resistance. Consider solar tractor drive speed is low and change slowly, so when determine hub motor power, we can neglect aerodynamic drag and acceleration resistance power, only consider the horizontal and slope road driving power required (Hilliard and Jamieson, 2007;Wang et al, 2014;Kolator and Białobrzewski, 2011).…”