A steering reaction force generation device for a vehicle may include a housing; a transfer shaft part rotatably installed in the housing, and disposed coaxially with a steering shaft; a stator part fixed to the inside of the housing; a rotor part connected to the transfer shaft part, and configured to rotate the transfer shaft part through an electromagnetic interaction with the stator part; and a power transfer part installed in the rotor part, and configured to transfer a rotational force of the transfer shaft part to the steering shaft.

A steering control device controls, as a target, a steering device including a steering actuator and a turning actuator that has a structure with a power transmission path cut off from the steering actuator. The steering control device includes a control unit. The control unit is configured to execute; turning-side synchronization control when the absolute value of a deviation amount is a value within a first range; steering-side synchronization control when the absolute value of the deviation mount is a value within a second range that is a larger value than a value within the first range; and at least one of the turning-side synchronization control and the steering-side synchronization control when the absolute value of the deviation amount is a value within a third range that is a value between a value within the first range and a value within the second range.

Embodiments of the present disclosure provide a sun gear coupled to a steering shaft connected to a steering wheel operated by a driver and rotating in interlocking motion, a planetary gear externally coupled to the sun gear, a ring gear to which the planetary gear is internally coupled, a first support protrusion is provided at one end of the axial direction, and is coupled to and fixed to an inner circumferential surface of a gear housing, and a carrier to which a rotation shaft of the planetary gear is coupled and provided with a second support protrusion supported by the first support protrusion on an outer circumferential side.

An arrangement of a steering device is provided for use with a steering system of a vehicle, which includes a rigid steering part and a rotatable steering part. The arrangement includes a steering wheel coupled to the rotatable steering part via a transmission, and a motor configured to rotate the rotatable steering part. The transmission includes a first machine element, a second machine element, and a third machine element. The first machine element is rotationally connected to the rotatable steering part, the second machine element is rotationally connected to the steering wheel, and the third machine element couples the first machine element to the second machine element. The third machine element is mounted for rotation about an axis of rotation, wherein the axis of rotation is arranged rigidly relative to the rigid steering part.

According to the embodiments of the present invention, the drive feel suitable to given conditions is provided to a driver by generating friction when a steering shaft is rotated to enhance the drive feel of the driver, limiting the maximum steering angle, restoring the steering wheel automatically, and controlling friction on the steering shaft in accordance with the steering angle, vehicle speed and road conditions.

A steer-by-wire steering system for a motor vehicle may include a steering column having a support unit and a steering shaft rotatably mounted in the steering column, a steering handle disposed in a rotationally fixed manner on the steering shaft, and a feedback actuator that is configured to apply a torque to the steering shaft. The feedback actuator here may be disposed outside the support unit, as a result of which installation space is available in the region of the steering column. The feedback actuator of the steer-by-wire steering system may in some cases be disposed on a bulkhead of a motor vehicle body.

A system for controlling steering torque of a steering system of a vehicle may include a steering wheel, a steering shaft rotatably fixed to the steering wheel, a steering actuator controllable to apply a steering torque associated with a perceived stiffness to the steering shaft, and one or more driving style sensors provided in association with the steering wheel, where the driving style sensors generate data indicative of a grip style of a driver on the steering wheel. The system may further include a computing device communicatively coupled to the one or more driving style sensors and the steering actuator. The computing device may determine a driving style of the driver based at least in part on the data generated by the one or more driving style sensors and control an operation of the steering actuator to adjust the perceived stiffness based at least in part on the driving style.

The present embodiments provide a steer by wire type steering apparatus including a screw shaft coupled to the steering shaft to rotate and having an outer circumferential screw portion formed on an outer circumferential surface, a moving member coupled to an outer peripheral side of the screw shaft, an inner circumferential screw portion corresponding to the outer circumferential screw portion being formed on an inner circumferential surface to move in an axial direction when the screw shaft rotates, a housing formed in a cylindrical shape and having the screw shaft and the moving member disposed therein, and at least one guide member provided in the housing to support the outer peripheral side of the moving member and guide the axial movement of the moving member.

According to one or more embodiments, a method includes computing, by a steering system, a model rack force value based on a vehicle speed, steering angle, and a road-friction coefficient value. The method further includes determining, by the steering system, a difference between the model rack force value and a load rack force value. The method further includes updating, by the steering system, the road-friction coefficient value using the difference that is determined.

The present disclosure provides a shift by wire (SBW) driving actuator capable of improving control performance and durability through control of a brushless direct current (BLDC) motor by an inductive sensor, and improving gear transmission efficiency by introducing a multistage teeth-shaped transmission unit configured to connect a sun gear and an output shaft of a reducer to transmit a rotational force to reduce a load resulting from eccentric rotation of the sun gear.