Theoretical investigations of vehicle operating with auxiliary driving wheels with hydrostatic transmission

Abstract

In the work a task of driving wheel towing reduction of a mobile vehicle, which is exploited in bad passing conditions, is investigated. For that purpose transmission is used, when the engine-developed torque is transmitted to all driving wheels of the vehicle via the mean driving bridge differentials. For the auxiliary driving wheel transmission a hydrostatic system is used, made of constant operating volume hydraulic machines. In the work a mathematical model of hydraulic transmission of a mobile vehicle is given, being under analysis, basic properties of such transmission have been investigated, constructional parameter values, in which the torque distribution is realized so that the towing of driving wheels is minimum, have been detected. Also a hydraulic transmission power losses and the influence of the properties of some supporting surfaces to kinematical indexes of compatibility have been analyzed.