STEUERUNGSSYSTEM FÜR EIN LANDWIRTSCHAFTLICHES FAHRZEUG

摘要

A control system is described for a hydrostatic transmission (12) of an agricultural vehicle comprising a variable displacement hydrostatic pump and a hydrostatic motor. The control system comprises means (20) for determining the prevailing transmission ratio and a controller (16) for applying a demand signal to set the desired ratio of the hydrostatic transmission (12). The magnitude of the demand signal applied by the controller (16) to the transmission (12) is limited such that the no-load transmission ratio corresponding to the demand signal does not differ from the prevailing measured transmission ratio by more than a predetermined amount.