Abstract: The steering system for the vehicle includes: a steering mechanism mechanically separated from a steering member and configured to steer wheels by moving a rack; a steering actuator configured to apply a driving force to the steering mechanism; and a controller configured to calculate a target position of the rack and to control the steering actuator such that a position of the rack matches the target position thereof. The controller is configured to execute target position correction control in which the controller corrects the target position of the rack according to a steering angular velocity and/or a steering angular acceleration of the steering member.

Abstract: A steering system is provided with a control unit (15) configured to determine a target steered angle (?t) according to a steering angle (?) of a steering shaft (18) which is fitted with a steering wheel (19) and drive a steering actuator so as to cause the steered angle (?) to coincide with the target steered angle, and to determine a target reaction force (Tt) according to a steered state of the wheels and drive a reaction force actuator (13) so as to cause the reaction force to coincide with the target reaction force. The control unit is configured to correct an output of the steering angle sensor in such a manner that a geometric steering center of the steering wheel coincides with a mechanical steering center of the steering shaft upon receiving a prescribed input (S) from a manual input switch (37).

Abstract: The present disclosure relates to a steer-by-wire steering system for a motor vehicle containing a steering shaft that can be torsionally connected to a steering handling device, a feedback actuator having an electric motor acting on a rotor shaft, a transmission by means of which the rotor shaft is connected to the steering shaft, and a first angle sensor and a second angle sensor. A control unit assigned to the steering system is designed to receive a first sensor signal S provided by the first angle sensor, to receive a second sensor signal S provided by the second angle sensor, and to provide a control signal ST for controlling the electric motor.

Abstract: Provided is a steer-by-wire steering system for a vehicle that can reduce or eliminate the impact noise generated by the rack at the rack end. A control unit of the steering system is configured to determine a target steered angle (?t) according to the steering angle and drive the steering actuator so as to cause the steered angle to coincide with the target steered angle, and to determine a target reaction force (Tt) according to a steered state of the wheels and drive the reaction force actuator so as to cause the reaction force to coincide with the target reaction force. The control unit is further configured to set a maximum limit (?mC) on the target steered angle, the maximum limit being a value smaller than a physical maximum steered angle (?mP) of the wheels imposed by the steering mechanism.

Abstract: To prevent a driver from feeling uncomfortable when the driver touches a steering member in a state where a driving source is stopped, a vehicle steering system (1) is provided in a vehicle (2) that travels by a driving force generated by a driving source (51). The vehicle steering system (1) includes; a steering member (10) configured to accept a steering operation; and a reaction force actuator (13) configured to apply a reaction force to the steering member (10) in response to the steering operation. In a state where the driving source (51) is stopped, the reaction force actuator (13) is configured to apply the reaction force to the steering member (10) based on a stopped time position that is a position of the steering member (10) at a time when the driving source (51) is stopped.

Abstract: A steer-by-wire steering system for a motor vehicle may include a rotatably supported steering spindle, a feedback actuator with a feedback motor for acting on the steering spindle, a steering actuator with a steering motor for acting on steered wheels of the motor vehicle based on rotation of the steering spindle, and two control units for controlling the feedback motor and the steering motor. A first control unit of the two control units and a second control unit of the two control units have different levels of complexity relative to each other, in particular such that the first control unit is more powerful than the second control unit. Also, a method can be utilized to operate such a steer-by-wire steering system, whereby the first control unit and the second control unit execute procedures of different complexity relative to each other.

Abstract: In a steer-by-wire steering system for a vehicle, a control unit (16) controls an operation of a steering actuator to cause the steered angle of wheels to be in a prescribed relationship to a steering angle, and an operation of the reaction force actuator (15) including a pair of reaction force motors (14) to cause the reaction force to be a value (Tt) corresponding to a steered state of the wheels, wherein the control unit is provided with a failure detection unit (36) configured to detect failures of the reaction force motors, and upon detecting a failure of one of the reaction force motors, progressively reduce an output (Tta) of the other reaction motor to a prescribed limit value (TL).

Abstract: Provided is a steering system for a vehicle that can suppress the discomfort of a driver in a case where the driver performs a quick steering operation. The steering system for the vehicle includes: a steering mechanism mechanically separated from a steering member and configured to steer wheels by moving a rack; a steering actuator configured to apply a driving force to the steering mechanism; and a controller configured to calculate a target position of the rack and to control the steering actuator such that a position of the rack matches the target position thereof. The controller is configured to execute target position correction control in which the controller corrects the target position of the rack according to a steering angular velocity and/or a steering angular acceleration of the steering member.

Abstract: A method for controlling a steer-by-wire steering system for a motor vehicle may involve determining a torque request signal with a position controller of an activation unit based at least on a desired steering angle and an actual steering angle, limiting the torque request signal in a signal limiting device of the activation unit such that the torque requested by the limited torque request signal is limited to a permissible torque range, and transmitting the limited torque request signal to an electronically controllable steering actuator. The signal limiting device may determine a reference torque signal by way of a reference controller based at least on the desired steering angle and the actual steering angle. The signal limiting device may define the permissible torque range by way of a selectable maximum deviation from the reference torque signal.

Abstract: The present disclosure relates to a steer-by-wire steering system for a motor vehicle containing a steering shaft that can be torsionally connected to a steering handling device, a feedback actuator having an electric motor acting on a rotor shaft, a transmission by means of which the rotor shaft is connected to the steering shaft, and a first angle sensor and a second angle sensor. A control unit assigned to the steering system is designed to receive a first sensor signal S provided by the first angle sensor, to receive a second sensor signal S provided by the second angle sensor, and to provide a control signal ST for controlling the electric motor.

Abstract: Provided is a steer-by-wire steering system for a vehicle that can reduce or eliminate the impact noise generated by the rack at the rack end. A control unit of the steering system is configured to determine a target steered angle (?t) according to the steering angle and drive the steering actuator so as to cause the steered angle to coincide with the target steered angle, and to determine a target reaction force (Tt) according to a steered state of the wheels and drive the reaction force actuator so as to cause the reaction force to coincide with the target reaction force. The control unit is further configured to set a maximum limit (?mC) on the target steered angle, the maximum limit being a value smaller than a physical maximum steered angle (?mP) of the wheels imposed by the steering mechanism.

Abstract: A steering system is provided with a control unit (15) configured to determine a target steered angle (?t) according to a steering angle (?) of a steering shaft (18) which is fitted with a steering wheel (19) and drive a steering actuator so as to cause the steered angle (?) to coincide with the target steered angle, and to determine a target reaction force (Tt) according to a steered state of the wheels and drive a reaction force actuator (13) so as to cause the reaction force to coincide with the target reaction force. The control unit is configured to correct an output of the steering angle sensor in such a manner that a geometric steering center of the steering wheel coincides with a mechanical steering center of the steering shaft upon receiving a prescribed input (S) from a manual input switch (37).

Abstract: In a steer-by-wire steering system for a vehicle, a control unit (16) controls an operation of a steering actuator to cause the steered angle of wheels to be in a prescribed relationship to a steering angle, and an operation of the reaction force actuator (15) including a pair of reaction force motors (14) to cause the reaction force to be a value (Tt) corresponding to a steered state of the wheels, wherein the control unit is provided with a failure detection unit (36) configured to detect failures of the reaction force motors, and upon detecting a failure of one of the reaction force motors, progressively reduce an output (Tta) of the other reaction motor to a prescribed limit value (TL).

Abstract: A steer-by-wire steering system for motor vehicles includes an electronically controlled steering actuator acting on steered wheels of the vehicle responsive to a steering demand and a feedback actuator transmitting retroactive effects of the road to a steering wheel, wherein the feedback actuator and the steering actuator have a redundant power supply.

Abstract: A steer-by-wire steering system for a motor vehicle may include a rotatably supported steering spindle, a feedback actuator with a feedback motor for acting on the steering spindle, a steering actuator with a steering motor for acting on steered wheels of the motor vehicle based on rotation of the steering spindle, and two control units for controlling the feedback motor and the steering motor. A first control unit of the two control units and a second control unit of the two control units have different levels of complexity relative to each other, in particular such that the first control unit is more powerful than the second control unit. Also, a method can be utilized to operate such a steer-by-wire steering system, whereby the first control unit and the second control unit execute procedures of different complexity relative to each other.

Abstract: To prevent a driver from feeling uncomfortable when the driver touches a steering member in a state where a driving source is stopped, a vehicle steering system (1) is provided in a vehicle (2) that travels by a driving force generated by a driving source (51). The vehicle steering system (1) includes; a steering member (10) configured to accept a steering operation; and a reaction force actuator (13) configured to apply a reaction force to the steering member (10) in response to the steering operation. In a state where the driving source (51) is stopped, the reaction force actuator (13) is configured to apply the reaction force to the steering member (10) based on a stopped time position that is a position of the steering member (10) at a time when the driving source (51) is stopped.

Abstract: A method for controlling a steer-by-wire steering system for motor vehicles includes a steering actuator that acts on the steered wheels and is electronically controlled in accordance with a steering request. A feedback actuator transmits reactions of the road to a steering wheel. A control unit controls the feedback actuator. The method includes determining a basic motor torque; providing at least one steering function which is part of a first subgroup of steering functions; limiting the output value of the at least one steering function to reach a predefined safety level in a first limiter; adapting the basic motor torque by means of the limited output value of the at least one steering function in a summing element; and actuating the feedback actuator with the resulting motor torque which is output by the summing element.

Abstract: A method for controlling a steer-by-wire steering system involves determining a torque request signal with a position controller based on desired and actual steering angles, checking with a checking device for an error state of the position controller, selecting the torque request signal as a checked torque request signal if the error state has not been determined, selecting a reference torque signal as the checked torque request signal if the error state has been determined, and transmitting the checked torque request signal to the steering actuator. By evaluating a cumulative deviation variable, which is calculated by a calculation unit of the checking device as a time integral over a control deviation between the desired and actual steering angles, the checking device determines whether the error state is present and determines the reference torque signal with a reference controller based on the control deviation.

Abstract: A method for controlling a steer-by-wire steering system for a motor vehicle may involve determining a torque request signal with a position controller of an activation unit based at least on a desired steering angle and an actual steering angle, limiting the torque request signal in a signal limiting device of the activation unit such that the torque requested by the limited torque request signal is limited to a permissible torque range, and transmitting the limited torque request signal to an electronically controllable steering actuator. The signal limiting device may determine a reference torque signal by way of a reference controller based at least on the desired steering angle and the actual steering angle. The signal limiting device may define the permissible torque range by way of a selectable maximum deviation from the reference torque signal.

Abstract: A steer-by-wire steering system for motor vehicles, including a steering actuator electronically controlled depending on a driver's steering command and acting on the steered wheels and a feedback actuator transmitting feedback from the road to a steering wheel and further including a first steering angle sensor. The steering actuator includes a redundant power supply and is connected to a first power supply and a second power supply. The feedback actuator is connected to the first power supply and the steer-by-wire steering system includes a second steering angle sensor, which is independent of the feedback actuator and is connected to the second power supply.