A steer-by-wire steering system for a motor vehicle or a steering system for an autonomous driving motor vehicle includes a controller configured or programmed to control steering of steerable road wheels depending on a driver's input or an input of an autonomous driving unit and to include a normal mode of operation with full steering functionality and no quality problems, and at least two degraded modes with degraded operation of the steering system. The steering system includes an evaluator to evaluate a state of performance degradation of the steering system and to set the operation mode of the controller based on an evaluation result from the evaluator.

A steering control method for a redundant steering system. The method includes: receiving, by a first steering controller and a second steering controller, a first command signal and a second command signal, respectively; and synchronizing control outputs of the first steering controller and the second steering controller in a way that at least one of the first steering controller and the second steering controller compensates a control timing according to the first command signal and the second command signal so that the control outputs are synchronized.

A steering system is configured such that electric power is supplied to a steering actuator and a turning actuator from a first power supply when a power state of a vehicle is an on state and supply of the electric power from the first power supply is cut off when the power state is an off state. The steering system includes a rotation curbing unit configured to operate such that rotation of the steering wheel is curbed in at least a part of a first power-off period from when the power state becomes an off state until when the power state becomes the on state next, as an operating period, and a second power supply configured to supply, to the rotation curbing unit, the electric power required for operation of the rotation curbing unit in the operating period, the second power supply being different from the first power supply.

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).

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.

A vehicle steering system and a vehicle are provided. The vehicle steering system includes a steering shaft and a steering transmission shaft. The steering shaft or the steering transmission shaft includes a first shaft section and a second shaft section. A clutch mechanism is arranged between the first shaft section and the second shaft section. In an engaging state, a transmission connection is established between the first shaft section and the second shaft section and in this case, a controller determines that the vehicle enters a driving mode. In a disengaging state, the transmission connection between the first shaft section and the second shaft section is disconnected, and in this case, the control modulecontroller determines that the vehicle enters a game mode.

The disclosure relates to a steering control device and method. Specifically, according to the disclosure, a steering control device comprises a first steering control module controlling a first reaction force motor to generate a reaction force torque for a steering wheel through a first inverter and a second steering control module controlling a second reaction force motor to generate a reaction force torque for the steering wheel through a second inverter. The first steering control module or the second steering control module generates the reaction force torque by conducting one of the first inverter and the second inverter when the first inverter and the second inverter fail.

A steer-by-wire steering system, including a steering device including a dual-system steering motor including a main system and a sub system, wherein a power supply to the main system is conducted selectively by a main power source and a backup power source, and a power supply to the sub system is conducted by only the main power source, wherein, in a normal power-supply situation in which the power supply to the main system and to the sub system is conducted by the main power source, a controller controls the sub system to operate in accordance with the main system, and wherein, in a backup power-supply situation in which the power supply to the main system is conducted by the backup power source, the controller controls the main system not to operate or to operate while limiting the power supply to the main system and controls the sub system independently.

A steering system and a vehicle are provided. The steering system includes a steering wheel end shaft, a steering device end shaft, and an electric driving mechanism configured to drive decoupling or coupling of the steering wheel end shaft and the steering device end shaft that are coaxially disposed.

Disclosed are a clutch mechanism, a steering system, and an automobile. The clutch mechanism includes a slidable block and a driving component. The slidable block can be accommodated in a radial spacing between a first end shaft and a second end shaft that are coaxially arranged and radially spaced apart from each other, and is configured to translate along an axial direction of the first end shaft and the second end shaft to realize decoupling or coupling between the first end shaft and the second end shaft. The driving component is configured to drive the slidable block to translate along the axial direction of the first end shaft and the second end shaft.