Dual-circuit steer-by-wire steering system comprising a common cradle

摘要

The invention relates to a steer-by-wire steering system comprising a hydraulic control unit that acts on the steerable wheels ( 1, 20 ), the control unit having at least one cradle ( 4, 23 ), which is displaceably mounted on at least one guide rod ( 5, 24 ) that passes through the respective cradle ( 4, 23 ). The respective cradle ( 4, 23 ) and the corresponding guide rod(s) ( 5, 24 ) form working chambers (A₁₁, A₁₂, A₂₁, A₂₂) of a piston-cylinder system, whereby each respective guide rod ( 5, 24 ) has at least one channel (KA₁₁, KA₁₂, KA₂₁, KA₂₂), each terminating in the vicinity of a working chamber (A₁₁, A₁₂, A₂₁, A₂₂). The cradle or cradles (_{4, 23}) adjust the steerable wheels ( 1, 20 ) directly or by means of steering tie rods ( 2, 21 ).