A steering system of a two-track vehicle has a control rod which is displaceable transverse to the longitudinal axis of the vehicle, and track rods coupled at the two ends of the control rod, which act on steerable wheels of the vehicle such that the wheels are pivoted around the steering axis of rotation by a displacement of the control rod. The control rod is configured divided into two control rod parts each assigned to a wheel and connected to each other via a coupling member which braces the two control rod parts against each other at least temporarily, and at least temporarily enables a relative movement of the two control rod parts in the transverse direction of the vehicle. The coupling member is connected to each of the control rod parts via screw threads. The screw axis of rotation of the screw threads is the longitudinal axis of the control rod. The control rod parts and/or the coupling member are rotatable around the longitudinal axis.

A steering system of a two-track vehicle has a control rod which is displaceable transverse to the longitudinal axis of the vehicle, and track rods coupled at the two ends of the control rod, which act on steerable wheels of the vehicle such that the wheels are pivoted around the steering axis of rotation by a displacement of the control rod. The control rod is configured divided into two control rod parts each assigned to a wheel and connected to each other via a coupling member which braces the two control rod parts against each other at least temporarily, and at least temporarily enables a relative movement of the two control rod parts in the transverse direction of the vehicle. The coupling member is connected to each of the control rod parts via screw threads. The screw axis of rotation of the screw threads is the longitudinal axis of the control rod. The control rod parts and/or the coupling member are rotatable around the longitudinal axis.

The present invention provides a vehicle including wheels, and a steering module configured to steer the wheels in one of two mutually opposite right and left directions, or in one and the other of the two mutually opposite right and left directions, respectively. In the vehicle, a caster angle is set within the range of 3 degrees relative to a kingpin angle. Though each wheel usually forms a camber angle when steered, by setting in the wheel the caster angle beforehand within the above range, the wheel does not or is less likely to form the camber angle because the camber angle and the caster angle cancel each other. Therefore, it is possible to prevent the steering angles of the wheels from being restricted, and to prevent the deterioration of steering operability.

A method of controlling a steering device including a pair of rack bars capable of steering right and left wheels in one and/or the other of opposite right and left directions, and a coupling mechanism which moves the rack bars in the right direction and/or the left direction by the same distance. The method includes issuing a command to couple or uncouple the coupling mechanism, and driving at least one of an engaging part and a receiving part of the coupling mechanism relative to the other if a coupling state sensor are unable to detect that the coupling mechanism has been coupled or uncoupled when a predetermined time has passed after issuing the command.

A vehicle steering system mounted on a vehicle having a plurality of wheels that are steerable, including: a wheel steering device configured to steer the wheels independently of each other; and a controller configured to control the wheel steering device such that a steering amount of each wheel becomes equal to a target steering amount determined for each of the wheels based on a steering request, wherein, in a one-wheel improperly steered state in which one of the wheels is an improperly steered wheel that is improper in steering, the controller determines, as a steering compensation wheel, at least one of one or more of the wheels except the improperly steered wheel and changes the target steering amount of the steering compensation wheel so as to ensure, based on the steering request, a total sideways force that is a total of sideways forces to be generated respectively by the wheels.

A vehicle steering system mounted on a vehicle having a plurality of wheels that are steerable, including: a wheel steering device configured to steer the wheels independently of each other; and a controller configured to control the wheel steering device such that a steering amount of each wheel becomes equal to a target steering amount determined for each of the wheels based on a steering request, wherein, in a one-wheel improperly steered state in which one of the wheels is an improperly steered wheel that is improper in steering, the controller determines, as a steering compensation wheel, at least one of one or more of the wheels except the improperly steered wheel and changes the target steering amount of the steering compensation wheel so as to ensure, based on the steering request, a total sideways force that is a total of sideways forces to be generated respectively by the wheels.

It is an object of the present invention to provide a rear wheel steering device of which the weight is not added to unsprung weight, and which can steer right and left rear wheels independently of each other. The rear wheel steering device includes a first rod connected to the left rear wheel, a first driving portion configured to axially move the first rod, a second rod connected to the right rear wheel, a second driving portion configured to axially move the second rod; and a single housing supporting the first rod, the first driving portion, the second rod, and the second driving portion.

Systems, methods, and apparatus are described herein related to steering assemblies to maintain a predetermined Ackerman geometry as well as for determining dimensions of modified elliptical gears based on ratios between angles of steerage implemented at first and second steerable wheels of a vehicle to maintain a predetermined Ackerman geometry.

Systems, methods, and apparatus are described herein related to steering assemblies to maintain a predetermined Ackerman geometry as well as for determining dimensions of modified elliptical gears based on ratios between angles of steerage implemented at first and second steerable wheels of a vehicle to maintain a predetermined Ackerman geometry.

The invention relates to a vehicle steering system comprising a steering wheel, a first and a second steering assembly. The steering assemblies each comprise a steering linkage mechanically connected to a road wheel and a support motor. The steering wheel is configured to control a steering angle of a first road wheel via a first support motor actuating a first steering linkage. A processing circuitry is configured to receive, from the first steering assembly, input signals comprising one or more steering parameter values measured for the first steering assembly. Based on the received first input signals, the processing circuitry is configured to calculate a desired steering angle of a second road wheel and to send control signals to a second support motor so as to actuate a second steering linkage such that the desired steering angle of the second road wheel is obtained. A method is also disclosed.