A motor electric control unit (ECU) for an electromechanical power steering mechanism, which controls current through an electric assist motor in response to steering mechanism sensors' signals. The ECU may comprise at least two channels. Each channel has the steering mechanism sensors in a redundancy concept. At least one voter that is assigned to an actuator and is configured to vote on the correct steering mechanism sensors' outputs of the at least two channels. The steering mechanism sensors may include a steering column torque sensor and an RPS sensor for sensing a rotor angle of the electric assist motor. Each of the at least two channels may include processors that have different software to protect against systematic faults.

A steer by wire type steering apparatus according to the embodiments of the present disclosure comprises an output shaft provided with fixing grooves on both sides, a moving member which moves in the axial direction when the output shaft is rotated and is provided with a guide portion protruding in the radial direction on an outer circumferential surface, a pair of guide stoppers for guiding the axial movement of the moving member, an elastic ring for elastically supporting the guide stoppers in a radial direction, and housing.

A vehicle steering assembly comprising an input shaft to be connected to a steering device, a first electric motor connected to the input shaft and arranged to provide a steering device torque and/or a steering device angle, an output shaft connected via a steering linkage to a number of ground engaging members, a rod placed between the input shaft and the output shaft, a first arm rotatably connected to the input shaft and rotatably connected to the rod, and a second arm rotatably connected to the rod and rotatably connected to the output shaft, a second electric motor connected to the output shaft and arranged to provide a steering control torque and/or a steering control angle, wherein the rod comprises a flexible drag link, which in combination with the first and second arm provide for forces in longitudinal direction to be absorbed.

Described is a rotation limitation module for a steer-by-wire steering system. Said rotation limitation module comprises a housing in which a shaft portion that is rotatable about a central axis and is able to be rotatably coupled to a steering wheel shaft or is configured as a portion of the steering wheel shaft is received. Furthermore provided is a limiter disk which by way of a sliding guide is coupled in a rotationally fixed and axially displaceable manner to the shaft portion and has an external thread which is driven into an internal thread of the housing. Moreover, the rotation limitation module comprises a first detent ring having a first detent wing, and a second detent ring having a second detent wing, both detent wings for limiting a rotation of the shaft portion being able to cooperate with the limiter disk. A steering wheel module for a steer-by-wire steering system is also disclosed, which comprises such a rotation limitation module.

An all-wheel steering system for a motor vehicle is described which has an active front axle steering system and an active rear axle steering system. The front axle steering system includes a gear ratio unit which is coupled to a steering wheel. The gear ratio unit is configured to define a front axle steering angle as a function of a steering wheel angle and a front axle steering ratio. In addition, the gear ratio unit is coupled to the rear axle steering system in such a way that the front axle steering ratio is adjustable as a function of a rear axle steering angle. Further, a motor vehicle having such an all-wheel steering system is discussed. Also presented is a method of operating an all-wheel steering system for a motor vehicle.

A handwheel actuator assembly includes a handwheel shaft configured to receive a handwheel; a feedback device operable to provide a variable level of resistance to rotation of the handwheel shaft; and a handwheel shaft position sensor operable to sense an angular position of the handwheel shaft. The handwheel shaft position sensor may be mounted on a circuit board. The circuit may comprise a controller that is configured to receive signals from the handwheel shaft position sensor.

A power assisted steering system provides a gear reduction between a steering wheel and a steering mechanism and a much larger gear reduction between an electric motor and a steering mechanism. The system is back-driveable from the steering mechanism. The system utilizes a ball-screw, several helical gears, and two bevel gears. A rack fixed to the ball-screw nut drives a sector gear.

In a reaction torque calculation process, an electronic control unit included in a steer-by-wire steering device is configured to calculate a distributed axial force obtained by distributing an angle axial force and an electric current axial force based on a final distribution ratio. The reaction torque calculation process includes at least one of a first abnormal-time process and a second abnormal-time process. The first abnormal-time process is executed to hold, for calculation of the angle axial force, a vehicle speed signal value immediately before the vehicle speed signal becomes abnormal. The second abnormal-time process is executed to hold, for calculation of a normal-time distribution ratio, a vehicle speed signal value immediately before the vehicle speed signal becomes abnormal or hold a value of the normal-time distribution ratio immediately before the vehicle speed signal becomes abnormal, and then gradually change the final distribution ratio to an abnormal-time distribution ratio.

The present disclosure related to a travel stop assembly for preventing rotation, and undesired locking, of a shaft. The travel stop assembly may comprise a shaft that extends along an axis and is rotatable about the axis. A lead screw may extend along the axis and be operatively engaged, and rotatable, with the shaft about the axis. A nut may be in threaded engagement with the lead screw and axially movable along a length of the lead screw upon rotation of the lead screw. At least one stop pin may operatively engaged the lead screw and the at least one stop pin may extend from the lead screw perpendicularly relative to the axis. The stop pin may be positioned on the lead screw to stop rotation of the lead screw and the stop pin may prevent locking of the nut to the lead screw.

A steer by wire type steering apparatus according to the present embodiments comprises a rotating shaft that rotates in conjunction with a steering shaft, a housing provided with a ball seating portion at one end and a ball is coupled and supported between the ball seating portion and an inner circumferential surface of the rotating shaft, a support member disposed inside the housing and provided with a protruding support portion for supporting the ball to one side in a circumferential direction while protruding in an axial direction, a ball support elastic member coupled to the housing and elastically supporting the ball to another side in the circumferential direction, and an actuator for moving the support member in the axial direction.