Hydrostatic transmission control with pressure feedback

摘要

A control arrangement is provided to control the output of a hydrostatic transmission in response to a selectable input from an operator. This is accomplished by having a adjustable relief valve connected to the pilot control arrangement that controls the displacement of the variable displacement pump of the hydrostatic transmission. The adjustable relief valve vents a portion of the pilot control pressure being directed to the variable displacement pump in response to the pressure between the variable displacement pump and the fluid motor of the hydrostatic transmission and the setting of the adjustable relief valve by the operator.