A vehicle control system includes: a steering wheel, a steering wheel steering angle sensor configured to acquire rotation information of the steering wheel, a steering wheel drive unit connected to the steering wheel and configured to drive the steering wheel to rotate, a steering mechanism configured to drive wheels of the vehicle to rotate, a wheel steering angle sensor configured to detect rotation information of the wheels, and a control module. The control module is electrically connected to the steering mechanism, the wheel steering angle sensor, the steering wheel steering angle sensor, and the steering wheel drive unit separately.

A steering control device includes a control unit, and the control unit includes a target steering angle calculating unit configured to calculate a target steering angle based on a steering torque and is configured to calculate a target reaction torque based on execution of feedback control for causing the steering angle to match the target steering angle. The control unit includes a plurality of axial force calculating units configured to calculate a plurality of kinds of axial forces acting on a turning shaft based on different state quantities and a grip state quantity calculating unit configured to calculate a grip state quantity based on the plurality of kinds of axial forces. The target steering angle calculating unit is configured to calculate the target steering angle in consideration of the grip state quantity.

A vehicle steering control method in which steering wheel vibrations are suppressed when a clutch is engaged while turning to suppress a sense of discomfort imparted to the driver. In this method, when transitioning from a steer-by-wire mode under an autonomous driving mode in which a steering clutch, through which a steering wheel and left and right front wheels are mechanically disconnected and connected, is disengaged, to an EPS control mode under a manual driving mode in which the steering clutch is engaged and an assist torque that corresponds to a detected torque from a torque sensor is imparted to the left and right front wheels, the steering clutch is engaged, and the assist torque is limited to a value that corresponds to the detected torque from the torque sensor from when the steering clutch is engaged until a prescribed limitation period has passed.

A steering control device configured to control a steering device includes a control unit. The control unit is configured to calculate a torque command value which is a target value of the motor torque based on execution of angle control for adjusting a convertible angle which is able to be converted to a rotation angle of the motor to a target angle; calculate the motor control signal based on the torque command value; and change a control gain which is used for the angle control based on a change of a factor influencing a behavior of a vehicle in response to steering.

A vehicle steering system provided for a vehicle whose driving state is switchable between a manual driving state and an automatic driving state, the vehicle steering system including a coupling mechanism configured to couple a steering operation member operated by a driver and at least one steerable wheel of the vehicle, wherein, when the driving state of the vehicle is switched from the manual driving state to the automatic driving state, the coupling mechanism is switched from a mechanically coupling state in which the coupling mechanism mechanically couples the steering operation member and the at least one steerable wheel to each other to a mechanically decoupling state in which the coupling mechanism mechanically decouples the steering operation member and the at least one steerable wheel from each other.

A steer-by-wire steering system (10) for a vehicle comprises a steering wheel actuator (12) for moving and detecting movements of a steering wheel (16) of the vehicle, wherein the steering wheel actuator (12) has a steering wheel electric motor (20) and is connected to the steering wheel (16) of the vehicle. Furthermore, the steer-by-wire steering system (10) has an axle actuator (14) for moving and detecting movements of wheels of an axle of the vehicle, wherein the axle actuator (14) comprises an axle electric motor (32) and an axle control unit (30) and is connected to the axle of the vehicle. In addition, the steer-by-wire steering system (10) comprises an equivalent circuit (36), which is designed to measure a current (U, V, W) induced by the steering wheel electric motor (20) and to provide the axle control unit (30) with at least one measurement value depending on the induced current (U, V, W) for controlling the axle electric motor (32).

A method for operating such a steer-by-wire steering system (10) is also specified.

An autonomous vehicle for passengers includes four steerable wheels where each steerable wheel is steered by a steering system having a set of two actuators. One actuator of each set of actuators is powered by a first power source while the other actuator of the set of powered by a second power source. Four controllers each control one actuator of each set of actuators and one actuator from another set of actuators.

A trailer reverse assist system includes a coupler angle detection sensor to detect a zero degree angle of the trailer relative to the vehicle. A drift controller receives signals from vehicle dynamics sensors. The drift controller is electrically connected with a trailer reverse assist module. When the vehicle is backing up the trailer on the intended straight line implied path and since the coupler angle sensor, detecting the zero degree angle, is not perfectly calibrated, based in the signals from the vehicle dynamics sensors, the drift controller 1) estimates a distance that the trailer has drifted from the straight line desired path and 2) in a closed-loop feedback manner, provides a drift correction signal to the trailer reverse assist module for modifying the value of the zero degree angle and thus cause adjustment of the steering system to realign the trailer towards the straight line implied path without manual steering intervention.

A motor vehicle including a steering mechanism, a steering gear mechanically decoupled from the steering mechanism, a drive unit for driving the steering gear, and a transmission unit connecting the drive unit in a torque-transmitting manner to the steering gear. The transmission unit including a first torque transmission path and a second torque transmission path wherein the transmission unit has a redundancy.

An electric power steering device of a steer-by-wire type includes: a steering input mechanism, which includes a steering wheel to be operated by a driver; a reaction force motor, which is configured to apply a steering reaction force to the steering wheel; a steering motor, which is configured to output a steering force; a steering mechanism, which is prevented from being mechanically connected to the steering input mechanism, and is configured to steer a steered wheel through the steering force generated by the steering motor; and a drive control device, which is configured to carry out drive control for the steering motor and the reaction force motor. At least one of the steering motor or the reaction force motor is constructed of a double-winding motor of a double-inverter type in which each of windings is duplexed, and the respective duplexed windings are individually driven by two inverters.