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1. (WO2019042531) STEER-BY-WIRE STEERING SYSTEM OF A MOTOR VEHICLE WITH A FEEDBACK ACTUATOR HAVING AN INTEGRATED MRF BEARING
Nota: Texto obtenido mediante procedimiento automático de reconocimiento óptico de caracteres.
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Claims

1 A steer-by-wire steering system (1) for a motorized vehicle comprising a feedback actuator (4) to simulate a steering feel to a steering device (5), wherein said feedback actuator (4) has an electric motor (11) with a motor shaft (12) connected to a driver input shaft (6) to be able to transmit a torque, wherein said motor shaft (12) is able to be rotated in at least one rolling bearing (20), characterised in that the rolling elements (23) of the at least one rolling bearing (202) are arranged in a magnetorheological fluid (27) and that the feedback actuator (4) further comprises means (24) to pass a magnetic field through said

magnetorheological fluid (27) for stiffening said fluid and restricting movement of said roll ing elements (23).

2 Steer-by-wire steering system according to claim 1, characterised in that the means to pass a magnetic field through said magnetorheological fluid (27) includes a ring-shaped coil (24).

3 Steer-by-wire steering system according to claim 2, characterised in that the coil (24) is arranged in the at least one rolling bearing housing (25).

4 Steer-by-wire steering system according to claim 3, characterised in that the at least one rolling bearing housing (25) is filled with the magnetorheological fluid (27).

5 Steer-by-wire steering system according to one of the preceding claims, characterised in that the motor shaft (12) is able to be rotated in an upper bearing (201) and a lower bearing (202), wherein the upper bearing (202) holds the free end of the motor shaft (12) and the lower bearing (202) is positioned at the opposite side of the motor's rotor (19).

6 Steer-by-wire steering system according to claim 5, characterised in that the rolling elements (23) of the lower bearing (202) are arranged in a magnetorheological fluid (27).

Steer-by-wire steering system according to one of the preceding claims, characterised in that the motor shaft (12) has a motor pulley (13) as part of a transmission gear (14), wherein attached to the motor pulley (13) is a belt (15) driving a pulley (16) connected to the driver input shaft (6).