Hydraulic steering device with load signal

摘要

Known steering systems of this type have the disadvantage that the dynamic load signal-generating current is a leakage current that unfavourably affects the efficiency. Another disadvantage appears in steering systems having a closed centre design: under an outer tractive stress, the dosed steering current reaches prematurely the steering cylinder. In this new type of steering system, the adjustment angles of the essential adjustment throttles (12, 13, 14, 15, 16, 17) are matched in a novel way, so that the load signal-generating current is used to actuate the steering system in a steering range having a limited speed of rotation. In this phase, the steering system works based on the open centre principle.