A steering assembly for steering a vehicle in response to a steering input, the steering assembly includes an axle extending between a pair of wheels, a plurality of linkages, a primary electric drive source, and a secondary electric drive source. The plurality of linkages includes a pair of knuckles operatively coupled to the wheels, a tie rod extending between and coupled to the pair of knuckles, and a drag link attached to one of the knuckles. The primary electric drive source is operatively attached to the drag link, and moves the drag link in response to the steering input to transfer movement through the plurality of linkages to turn the wheels. The secondary electric drive source is operatively attached to one of the plurality of linkages to move the one of the plurality of linkages in response to the steering input and independently from the primary electric drive source.

A coupling structure of suspension may include an assist knuckle, a RevoKnuckle rotatably engaged with the assist knuckle, rotated independently from the assist knuckle, and performing steering of a wheel located at an outermost periphery, a steering input portion fixed to a vehicle body and applying a steering force to the RevoKnuckle during steering, a rotation transfer unit located between and coupled between the RevoKnuckle and the steering input portion and absorbing angular displacement formed between the steering input portion and the RevoKnuckle, a first link unit having one end located on one side surface of the assist knuckle and the other end located at a lower end of the RevoKnuckle, and a second link unit having one end located on the other side surface of the assist knuckle and the other end located adjacent to the other end of the first link unit at the lower end of the RevoKnuckle.

A four-wheel steering control device for independently controlling steering of each of first to fourth wheels disposed in a vehicle. A commanded steering angle acquiring part acquires first to fourth commanded steering angles for first to fourth wheels of a vehicle. A four-wheel turning control rate calculating part determines first to fourth residual angles, by which the first to fourth wheels realize the first to fourth commanded steering angles, from current steering angles and calculate first to fourth turning control rates of the first to fourth wheels on basis of the first to fourth residual angles determined. A control part independently controls steering of each of the first to fourth wheels using the first to fourth turning control rates calculated.

An electric power steering apparatus having independent turning mechanisms for respective four wheels of a vehicle, has a problem in that, when a turning motor fails, a turning mechanism for a corresponding wheel stops functioning, resulting in reduction in the maneuverability and the stability of the vehicle. Turning motors of turning mechanisms independently disposed for respective four wheels of a vehicle, each have a redundant configuration. Specifically, each turning motor is configured as three-phase duplexing motors having two three-phase windings and two inverters for separately driving the three-phase windings.

A vehicle can include a first wheel, a second wheel, and a steering system. Either both the first wheel and the second wheel can be front wheels or both the first wheel and the second wheel can be rear wheels. The steering system can be configured to concurrently cause: (1) a steering angle of the first wheel to be at a first angle and (2) a steering angle of the second wheel to be at a second angle. A difference angle can be a difference of the first angle subtracted from the second angle and can be greater than an angle determined to comply with Ackermann steering geometry. Such a difference angle can act to securely brake the vehicle when the vehicle is parked at a location at which a three-dimensional shape of a topological relief of the location can complicate an effort to securely brake the vehicle.

An embodiment independent corner module includes a knuckle unit positioned on an inner side surface of a wheel, a steering unit disposed to face a strut coupled to the knuckle unit, the steering unit having a center shaft configured to be fixed to a vehicle body and configured to rotate about the center shaft, a guide rail configured to define a movement path through which the steering unit rotates and moves, and a rack steering unit positioned in the steering unit, fastened to the knuckle unit, and configured to apply rotating force to the knuckle unit in response to a movement in a longitudinal direction.

A dual-mode active rear-wheel steering device based on a multi-linkage mechanism, including: a steering angle control motor with a speed-reduction mechanism, a multi-linkage mechanism assembly for converting rotational motion of the steering angle control motor into linear motion of an end of the push rod, a steering actuating mechanism for converting linear motion of the multi-linkage mechanism assembly into rotation of a knuckle around a kingpin to make the rear wheels steer, a first electromagnetic pin puller and a second electromagnetic pin puller respectively configured to control a first extendable-retractable push rod assembly and a second extendable-retractable push rod assembly to work at a fixed or variable axial length. The device uses the steering angle control motor to drive the two rear wheels to turn in the same direction or opposite directions through the control of energized state of the two electromagnetic pin pullers.

An apparatus for four-wheel independent steering. The apparatus may include: a rear wheel angle computation unit configured to compute a rear wheel angle (δ.sub.r) resulting by multiplying a front wheel angle (δ.sub.f) by a predetermined front/rear wheel angle ratio (Kss) corresponding to a vehicle speed (V); a gain computation unit configured to compute a gain (A) corresponding to a steering angle acceleration and the vehicle speed and then to output a final rear wheel angle (δ.sub.r) resulting by multiplying the rear wheel angle (δ.sub.r) computed by the rear wheel angle computation unit by the computed gain (A); and a control unit configured to perform rear wheel steering control based on the front wheel angle (δ.sub.f) and the final rear wheel angle (δ.sub.r).

The simultaneous maneuvering system includes a base, a plurality of wheel assemblies including at least one wheel rotatably mounted to the base, a plurality of steering rotors rotatably mounted to the base and the wheel assemblies, and a drive assembly having a drive frame coupled to each of the rotors. Operation of the drive assembly causes simultaneous rotation of the rotors and, thereby, positions the wheel of each corresponding wheel assembly in a desired direction.

A vehicle control method for controlling a vehicle including executing a front wheel and a rear wheel including: front wheel-only steering operation control for turning the front wheel without turning the rear wheel in response to a steering instruction from a driving entity; executing rear wheel-only steering operation control for turning the rear wheel without turning the front wheel in response to the steering instruction from the driving entity; and executing a specified control execution process for executing one type of steering operation control specified by the driving entity among a plurality of types of steering operation control including at least the front wheel-only steering operation control and the rear wheel-only steering operation control.