Tractive Efficiency Prediction for a Two Wheel Drive Tractor

Abstract

A prediction of the tractive efficiency of a two-wheel drive tractor was conducted with tractor dimensions and average cone indexes. Experimental data in a field for the discussion of the prediction accuracy were obtained through tractor drawbar pull tests. The deviations of the measured data to the predicted one of drawbar pull and tractive efficiency were calculated, and the deviation rates which were defined as the ratio of the deviation to the predicted maximums of the drawbar pull and the tractive efficiency were obtained. The mean deviation rate of the drawbar pull and the tractive efficiency were 0.07% and -0.29% respectively. This reveals that reliable predictions for the tractive performance become possible.