The present embodiments provide a steer by wire type steering apparatus including a first rotating member coupled to the steering shaft to rotate in interlocking, a second rotating member supported on the outer periphery of the first rotating member and rotating in conjunction with the first rotating member when the steering shaft rotates, and a housing in which the first rotating member and the second rotating member are built-in, coupled to the steering column, and the outer circumferential side of the second rotating member is supported on an inner circumferential surface to restrict rotation of the second rotating member.

The present embodiments provide a rack-driven power assisted steering apparatus including a rack bar having an outer circumferential screw groove formed, a ball nut having an inner circumferential screw groove and a pair of first and second ball circulation holes, a nut pulley provided with a space on the inner circumferential surface spaced apart from the outer circumferential surface of the ball nut and coupled to an end of the ball nut, and a return tube disposed between the outer circumferential surface of the ball nut and the inner circumferential surface of the nut pulley.

An electromechanical motor vehicle steering system includes a steering column, a steering rack, a steering pinion that couples the steering column to the steering rack, and an electric drive device with an electric motor and a worm wheel arranged on the steering pinion. The steering rack is arranged between the worm wheel of the electric drive device and the steering column.

An EPS controller reduces a turning angle of front wheels when it is determined that a normative yaw rate is larger than an actual yaw rate.

An electromechanical power steering system may include an electric servomotor that has a motor shaft and drives a shaft that meshes with a helical gear. The shaft is disposed in a gearbox housing and rotatably mounted in a bearing assembly. A pretensioning installation, for adjusting engagement between the helical gear and the shaft, resiliently pretensions a movable bearing element of the bearing assembly relative to the gearbox housing. The gearbox housing has a housing portion having first and second contact faces, the normals of which do not intersect. The bearing assembly has a bearing support that forms the movable bearing element and has a lever arm having a free end that extends from a main body of the bearing support and on the gearbox housing lies against the second contact face. The main body has an eccentric cam that on the housing lies against the first contact face.

A motor drive system is provided in a steer-by-wire system in which a steering mechanism and a turning mechanism of a vehicle are mechanically separated. The motor drive system includes a reaction force actuator and a turning actuator. The reaction force actuator functions as a motor configured to output a reaction force torque corresponding to a steering torque of a driver and a road surface reaction force. The turning actuator functions as a motor configured to output a turning torque for turning wheels. Each of the reaction force actuator and the turning actuator includes a plurality of control calculation units provided redundantly and each configured to perform a calculation related to a motor drive control, and a plurality of motor drive units provided redundantly and each configured to drive and output the torque based on a drive signal generated by a corresponding control calculation unit.

Belt driven rotary assist apparatus for recirculating ball steering gears are disclosed. An example motor vehicle steering system includes an input shaft to couple to a steering shaft of a motor vehicle, a worm gear, a first end of the worm gear coupled to the input shaft, a second end of the worm gear fixed to a helical spur gear, a ball nut surrounding a portion of the worm gear, the ball nut including ball bearings and ball guides, a first pulley wheel fixed to a pinion, the first pulley wheel engaged with a belt, the pinion engaged with the helical spur gear, a motor fixed to a second pulley wheel, the second pulley wheel engaged with the belt, the motor to rotate the worm gear to translate the ball nut, and a sector gear engaged with the ball nut, the sector gear to rotate as the ball nut translates.

The disclosure relates to an electric power steering system having a rack for steering wheels of a vehicle and having a pinion shaft. The pinion shaft meshes with a row of teeth of the rack in an assembled state. The rack has an assembly portion for an initial assembly of the pinion shaft, with one end of the row of teeth transitioning into the assembly portion. On the one hand, to facilitate initial assembly for establishing a connection between the pinion shaft and the row of teeth of the rack and, on the other hand, to prevent the connection between the pinion shaft and the row of teeth of the rack from breaking during repair measures carried out after the initial assembly, the electric power steering system is arranged such that first teeth of the row of teeth each have a first tooth height and the assembly portion has second teeth for interacting with the pinion shaft, the second teeth each having a second tooth height that is less than the first tooth height.

A fly-by-wire steering system uses one or more magnets and one or more magnetic sensors to determine the position the rack of the steering system. The magnetic sensors provide a high-level signal when proximate to magnet. The signals from magnetic sensors provide an indication of the position of the rack. The sequence of changing values of the signals magnetic sensors provides an indication of the direction of travel of the rack. The signals may be used to calibrate a steering sensor and/or an actuator.

A power steering system includes a pair of wheel steering mechanisms configured to turn a pair of steered wheels of a vehicle, and a coupling mechanism coupling the steered wheels and coupling the wheel steering mechanisms including operating-side and nonoperating-side mechanisms. The operating-side mechanism includes a drive shaft coupled to one end of the coupling mechanism and extending in an axial direction, and a steering operation member engaged with the drive shaft. The nonoperating-side mechanism includes a drive shaft coupled to the other end of the coupling mechanism and extending in an axial direction, and an electric assist device engaged with the drive shaft. The operating-side mechanism includes at least two operating-side stoppers respectively configured to limit right and left turns of the steered wheels. The nonoperating-side mechanism includes at least one nonoperating-side stopper configured to limit any one of right and left turns of the steered wheels.