The present invention relates to a steering system for a vehicle, the steering system comprising a steering unit comprising a steering wheel; a steering-feel unit for generating a steering reaction force when the steering wheel is rotated, the steering-feel unit comprising at least one spring coupled to the steering wheel, and an actuator for changing a spring loading and/or spring stiffness of the at least one spring. The steering system further comprises a position sensor for measuring an angular position of the steering wheel and/or a speed sensor for measuring a vehicle speed; and a control unit for controlling the actuator, the control unit operationally coupled to the actuator and to the position sensor and/or the speed sensor, wherein the actuator is configured to change the spring loading and/or spring stiffness depending on the angular position of the steer-ing wheel and/or the vehicle speed.

A steer-by-wire steering system for a vehicle, comprising: an operation member operable by a vehicle driver; an urging device configured to generate an urging force to urge the operation member; a steering device configured to steer a wheel; and a controller configured to control the urging device and the steering device. In a normal operation, the controller enables the wheel to be steered in accordance with an operation of the operation member and causes the urging force to function as an operation reaction force against the operation of the operation member. In an automatic steering operation in which the wheel is steered without depending on the operation of the operation member, the controller enables the operation member to be moved in accordance with steering of the wheel by the urging force and causes at least part of the urging force generated in the normal operation not to be generated.

According to the present embodiments, it is possible to enhance the driver's steering feel by limiting the maximum steering angle of the steering wheel and easily change the maximum steering angle of the steering wheel in real-time or with a minimum structure change as necessary.

A steering device includes: an electric motor configured to apply a driving force to cause a wheel of a vehicle to roll; a transmission unit configured to transmit the driving force of the electric motor to the wheel; an input determination unit 221 configured to determine whether an excessive external force equal to or greater than a predetermined force is input, or likely to be input, to the transmission unit via the wheel while the electric motor is applying the driving force; and a final target current setting unit 23 configured to, in response to the input determination unit 221 determining that the excessive force is input, or likely to be input, to the transmission unit, reduce the driving force of the electric motor so that a load on the transmission unit does not exceed an upper limit that is preset according to strength of the transmission unit.

A steering control device for a steering system includes an electronic control unit configured to: calculate target torque that is a target value of the motor torque; control operation of the motor; calculate a vehicle speed basic axial force based on a detected vehicle speed; calculate another state quantity basic axial force based on a state quantity other than the detected vehicle speed; calculate a distributed axial force by adding the vehicle speed basic axial force and the other state quantity basic axial force at individually set distribution ratios; calculate the target torque based on the distributed axial force; and reduce the distribution ratio of the vehicle speed basic axial force when the detected vehicle speed is abnormal as compared to when the detected vehicle speed is normal.

A steering system includes a rotary shaft to which an operation member is coupled; a first actuator; a second actuator; a control unit; and a moving unit configured to move the operation member between a normal position and a storage area. The control unit is configured to switch between a manual drive mode and an autonomous drive mode. The control unit is configured to, when moving the operation member from the storage area to the normal position, start synchronous control when the operation member satisfies a predetermined condition before the operation member reaches the normal position, the synchronous control being control in which the control unit controls the first actuator to change a rotation angle of the rotary shaft to an angle corresponding to a steered angle of steered wheels driven by the second actuator.

A steering control device includes control circuitry configured to perform synchronization control. The synchronization control includes a target synchronization angle calculating process of calculating a target synchronization angle that is a steering-side rotation angle satisfying a predetermined correspondence relationship with respect to a turning-side rotation angle; a target relay angle calculating process of calculating a target relay angle that is located closer to a first side in a circumferential direction than a first-side angle is, the first-side angle being one of the steering-side rotation angle and the target synchronization angle and being located closer to the first side than another of the steering-side rotation angle and the target synchronization angle is; and a motor driving process of operating a steering-side motor such that the steering-side rotation angle reaches the target synchronization angle after operating the steering-side motor such that the steering-side rotation angle reaches the target relay angle.

An independent suspension system includes a wheel knuckle engaged with a wheel and configured to be rotated in response to a steering input; a motor assembly disposed at one end of the wheel knuckle and configured to rotate the wheel knuckle; an upper arm engaged with the motor assembly; a lower arm having a first end engaged with a vehicle body and a second end engaged with the wheel knuckle; a connection arm configured to be engaged with the upper arm; a rotation pin disposed at a connection portion between the upper arm and the connection arm to enable integral rotation of the upper arm and the connection arm; and a shock absorber disposed between the connection arm and the lower arm and engaged with the connection arm so as to be perpendicular to the connection arm.

A handwheel actuator for a steer by wire system may include a feedback actuator and a column for operably coupling a handwheel to the handwheel actuator. The column includes a column shaft extending from a first end of the column to a second end of the column. The feedback actuator is operably coupled to the second end of the column and provides tactile feedback to an operator responsive to movement of the handwheel. The feedback actuator includes a torsion bar coaxial with the column shaft. The column shaft is supported relative to a housing of the column by a first column shaft bearing disposed proximate to the first end of the column and a second column shaft bearing disposed proximate to the second end of the column. The torsion bar extends into the column shaft past the second column shaft bearing and is operably coupled to the column shaft via a removable fastener disposed at a portion of the torsion bar that extends past the second column shaft bearing.

A steer by wire type steering apparatus according to the embodiments of the present disclosure comprises a steering shaft coupled to a steering wheel to rotate, a steering sensor for detecting a rotation direction of the steering shaft, an electronic controller for operating a steering motor in forward and reverse directions according to the rotation direction sensed by the steering sensor, a first pulley provided on a shaft of the steering motor, a second pulley provided on the steering shaft, a driving belt coupled to the first pulley and the second pulley, and a belt support member that rotationally supports one side of the driving belt and is coupled to a reduction gear housing.