The present disclosure relates to a steering control system, a steering control device, and a steering control method. More specifically, a steering control system according to the present disclosure comprises: an actuator driven at a target driving speed and with a target output current on the basis of an input control signal; a rack bar axially moving by the drive of the actuator; a location sensor for detecting the location of a rack included in the rack bar; and a steering control device for calculating a target rack stroke of the rack on the basis of at least one of a driving speed of a vehicle, a steering angle of a steering wheel and a rotation speed of the steering wheel, and generating a control signal such that the rack moves by the target rack stroke to control the drive of the actuator.

A steering control device for a vehicle controls a steering device having a steering mechanism and a drive unit configured to provide the steering mechanism with steering force for the wheels. The steering control device includes a detection unit to detect the steering angle; and a control unit to calculate a target value of a current to be supplied to the drive unit as a current command value, and execute automatic steering control to automatically control steering of the vehicle by causing the drive unit to be supplied with the current of the current command value. When an absolute value of the steering angle comes to a predetermined first threshold or more during the automatic steering control, the control unit decreases an upper limit value of an absolute value of the current command value as the absolute value of the steering angle increases.

A steering system includes a steering mechanism, a motor that is a source of an assist force, and a battery that supplies a voltage to the motor. The system includes a voltage sensor that detects a power supply voltage, a steering sensor that detects a steering angle, and a motor control signal generation circuit that calculates a q-axis voltage command value to allow the motor to generate the assist force and that generates a motor control signal based on the q-axis voltage command value. The system includes a steering-angular-velocity limiting circuit that calculates a compensation amount for compensation for the q-axis voltage command value and that derives the compensation amount by calculating a power supply compensation component based on the power supply voltage when the absolute value of the steering angle is equal to or larger than a predetermined steering angle close to a maximum steering angle.

A steering system includes a steering mechanism, a motor that is a source of an assist force, and a battery that supplies a voltage to the motor. The system includes a voltage sensor that detects a power supply voltage, a steering sensor that detects a steering angle, and a motor control signal generation circuit that calculates a q-axis voltage command value to allow the motor to generate the assist force and that generates a motor control signal based on the q-axis voltage command value. The system includes a steering-angular-velocity limiting circuit that calculates a compensation amount for compensation for the q-axis voltage command value and that derives the compensation amount by calculating a power supply compensation component based on the power supply voltage when the absolute value of the steering angle is equal to or larger than a predetermined steering angle close to a maximum steering angle.

In a drive assist control apparatus, based on a pinion angle command value and an LKA angle command value, a distribution ratio calculation unit calculates a distribution ratio that is a proportion of the LKA angle command value in a sum of the LKA angle command value and the pinion angle command value. An LA determination unit compares an LA threshold with a lateral acceleration that is related to the LKA angle command value and that is a product of a lateral acceleration and the distribution ratio, and determines whether or not to attenuate the lateral acceleration. When the lateral acceleration is determined to be attenuated, an LKA angle command value correction unit uses a low pass filter to progressively reduce the LKA angle command value to generate a filtered LKA angle command value.

The present disclosure relates to a power steering apparatus of a vehicle that includes: a rack housing configured to surround a rack bar and having an opening portion formed at one side thereof through which a steering shaft passes; a torque sensor cover that has a torque sensor therein and has a communicating hole formed therein through which the steering shaft passes and a first penetration portion having a first through-hole formed therein through which the fastening member passes; and a cover connecting member that has an insertion portion and a second penetration portion in order to connect the rack housing and the torque sensor cover, the insertion portion having an insertion hole formed therein where the opening portion is inserted and coupled and the second penetration portion having a second through-hole that is formed therein to correspond to the fastening hole and through which the fastening member passes.

A manual power pack assembly for an electric power steering (EPS) system includes a motor housing at least partially enclosing a motor and having an outer diameter. The manual power pack assembly also includes a connector plate formed of a material comprising plastic, the connector plate having a first side, a second side, and a cylinder extending from the first side. The manual power pack further includes a metal ring disposed on an inner diameter of the cylinder and in contact with the outer diameter of the motor housing.

A vehicle system includes: a steering device including an operation member, a turning member mechanically separated from the operation member and configured to turn a wheel, a reaction force actuator configured to apply a reaction force to the operation member, and a turning actuator configured to drive the turning member; a controller; and a display device. The controller is configured to determine whether a steering angle of the operation member and a turning angle of the wheel are in a phase deviation state, and cause the display device to perform a guidance display and an actual state display in a case where the steering angle and the turning angle are in the phase deviation state, the guidance display prompting a driver to perform an operation for phase matching to improve the phase deviation state, the actual state display indicating an actual turning state of the wheel.

A ball screw in a steering system has a groove between the inner peripheral surface of a cylindrical ball nut through which a steered shaft extends and the outer peripheral surface of the steered shaft, and balls are accommodated in the groove. The balls rolling and flowing in the groove are returned from downstream to upstream via deflectors and a return passage member disposed in the ball nut. The return passage member has a first connection portion curved to connect one end of a linear portion of the return passage member to the first deflector, and a second connection portion curved to connect the other end of the linear portion to the second deflector. Each connection portion has an opening that opens in the return passage member longitudinal end face and an opening that opens in the return passage member outer periphery of toward the centerline of the ball nut.

A steering system includes a motor, a rack shaft, and a nut that is screw-thread on the rack shaft via a plurality of balls. The steering system further includes a reduction mechanism having a driving pulley, a driven pulley, a belt, and an idler pulley that applies tension to the belt. The steering system further includes a housing that houses the motor, the rack shaft, the nut, and the reduction mechanism. Compressive rigidity in an axial direction is set to vary between a near-end area and a far-end area of the housing. The idler pulley is provided so as to contact a portion of the belt which is loosened when end contact occurs at an axial end of the housing where the compressive rigidity is set to a larger value.