Rational parameters and operation modes of modern tractors in conditions of variable character of external influences

The research objective was justification of the most effective parameters and operating modes of cultivating unit with wheel 4k4a tractor of the 5th class of draft. The research problem was the establishment of the extent of influence of variable external impacts on the parameters of traction characteristic of wheel tractor "John Deere 8310R" taking into account various values of its opera-tional weight. The research problems were solved by means of universal techniques of determination of the most rational values of traction dynamic characteristics of the tractor at casual character of external loading. The comparison of settlement data showed that power indicators of a tractor on unary or dual wheels at various values of coefficient of the variation of loading on this transfer insignificantly differ in identical size of opera-tional weight. The installation of dual wheels allows im-proving parameters of traction characteristic of a tractor. For example, traction power of a tractor increases on average by 6 %...