A method to control a steer-by-wire steering system of a road vehicle including a steering wheel coupled to a steering shaft, a road wheel actuator to turn steerable road wheels, a shaft sensor to detect a rotation of the steering shaft and a controller configured or programmed to generate an operation signal for the road wheel actuator from a signal detected by the shaft sensor, includes determining a real steering wheel angle by the shaft sensor, modifying the real steering wheel angle by applying an artificial hysteresis to create an offset between the real steering wheel angle and a modified steering wheel angle to mimic a behavior of an electromechanical power steering mechanism, and generating the motor torque request for the road wheel actuator based on the modified steering wheel angle.

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.

An electromechanical dual steering system for a utility vehicle includes two steering systems, each having a drive unit for actuating one steering linkage each for wheels of the utility vehicle. Each drive unit has an electric motor. The dual steering system has a main power supply for supplying the electric motors with energy. The electromechanical dual steering system is characterized in that the dual steering system has at least one emergency power supply for supplying at least one electric motor with energy in the event that the main power supply fails.

An electromechanical dual steering system for a utility vehicle includes two steering systems, each having a drive unit for actuating one steering linkage each for wheels of the utility vehicle. Each drive unit has an electric motor. The dual steering system has a main power supply for supplying the electric motors with energy. The electromechanical dual steering system is characterized in that the dual steering system has at least one emergency power supply for supplying at least one electric motor with energy in the event that the main power supply fails.

According to an embodiment, provided is a motor which comprises: a shaft; a rotor coupled to the shaft; a stator disposed corresponding to the rotor; and a housing disposed on the outside of the stator. The stator includes: a stator core; an insulator coupled to the stator core; a plurality of projections extending from the lower end of the insulator; and a protruding portion disposed below the insulator and fixed to the housing. The plurality of projections are spaced apart from each other in the circumferential direction, and at least a portion of the protruding portion is disposed in the spaces formed between the plurality of projections.

According to an embodiment, provided is a motor which comprises: a shaft; a rotor coupled to the shaft; a stator disposed corresponding to the rotor; and a housing disposed on the outside of the stator. The stator includes: a stator core; an insulator coupled to the stator core; a plurality of projections extending from the lower end of the insulator; and a protruding portion disposed below the insulator and fixed to the housing. The plurality of projections are spaced apart from each other in the circumferential direction, and at least a portion of the protruding portion is disposed in the spaces formed between the plurality of projections.

Provided is a drift car for children, including a car body, a driving system and a control system, the driving system includes a front wheel set, a rear wheel set and a motor set on the car body, the front wheel set includes a left front wheel and a right front wheel, and the rear wheel set includes a left rear wheel and a right rear wheel, the control system includes an on-board controller arranged in the car body, and the motor set includes a left motor and a right motor, in which the left motor is connected to the left front wheel or the left rear wheel, the right motor is connected to the right front wheel or the right rear wheel, and the left and right motors are both connected to the on-board controller; the controller system also includes a drift trigger switch connecting to the on-board controller.

A steer by wire type steering apparatus according to the embodiments of the present disclosure may comprise a screw shaft having an outer screw portion formed on an outer circumferential surface and rotating in association with a steering shaft, a moving member having an inner screw portion corresponding to the outer screw portion formed on the inner circumferential surface, coupled to the outer circumferential surface of the screw shaft, moving in the axial direction when the screw shaft is rotated, and provided with a radially protruding guide portion on the outer circumferential surface, and a housing provided with a guide groove in which the guide portion is inserted and supported on an inner circumferential surface.

Embodiments of the present disclosure may provide an electric power steering apparatus that controls the vehicle regardless of the driver's will to steer, even in the case of a truck or a bus requiring a relatively large steering force compared to a passenger car. Embodiments of the present disclosure may provide an electric power steering apparatus that can increase the convenience of the driver by enabling additional functions such as automatic parking, lane maintenance, driving assistance according to road surface conditions, and autonomous driving control to be used. Embodiments of the present disclosure may provide an electric power steering apparatus in which steering is stably performed even if one motor malfunctions or is damaged.

Embodiments of the present disclosure may provide an electric power steering apparatus that controls the vehicle regardless of the driver's will to steer, even in the case of a truck or a bus requiring a relatively large steering force compared to a passenger car. Embodiments of the present disclosure may provide an electric power steering apparatus that can increase the convenience of the driver by enabling additional functions such as automatic parking, lane maintenance, driving assistance according to road surface conditions, and autonomous driving control to be used. Embodiments of the present disclosure may provide an electric power steering apparatus in which steering is stably performed even if one motor malfunctions or is damaged.