A wheel suspension includes an axle limb which supports a wheel. The axle limb includes a first steering axle which provides a first steering angle in a specified range for the wheel, and components for connecting the axle limb to a support structure. At least one of the components includes a second steering axle which provides a second steering angle which is different than the first steering angle provided by the first steering axle. The second steering axle is selectively releasable. The components for connecting the axle limb to the support structure form a double transverse link axle which includes an upper traverse link and a lower traverse link. A support tube is arranged at a chassis-side end portion of each of the upper traverse link and the lower traverse link of the double transverse link axle. The support tube is pivotable about the second steering axle.

A suspension system for a vehicle. The suspension system has a steering knuckle connected through suspension means with a vehicle chassis portion, guiding means and driving means. The guiding means enable movement of the steering knuckle with respect to the vehicle chassis portion along an arched pathway between a first and a second position. The driving means effect the movement of the steering knuckle between the first and the second position. The guiding means effect a selected angular orientation of the steering knuckle with respect to the vehicle chassis portion during the movement between the first position and the second position.

A work vehicle includes a plurality of traveling devices driven for traveling, a plurality of articulated link mechanisms having a plurality of links pivotally coupled to each other to provide two or more joints and configured to independently support the traveling devices to a vehicle body with allowing lifting/lowering of the traveling devices independently relative to the vehicle body, and a plurality of hydraulic cylinders capable of changing respective postures of the plurality of links included in the articulated link mechanisms. A first link located at a position nearest the vehicle body is supported to be pivotable about a body side coupling portion. A first hydraulic cylinder for operating the first link has its cylinder tube side pivotally coupled to a coupled portion on the side of the vehicle body and has its piston rod side pivotally coupled to a coupled portion on the side of the first link.

A suspension device includes knuckles that rotatably retain rear wheels, an electric actuator that steers the rear wheels, paired tie rods that are connected to the electric actuator via a link mechanism and driven back and forth by the electric actuator, brackets that are rotated by the tie rods, and a lower arm attached to the brackets. Each bracket is rotatable between the knuckle and the lower arm.

An embodiment of the present invention allows for application of an assist torque or reaction torque which causes a driver to feel less discomfort. An ECU (600) includes a rack shaft axial force estimating section (620) configured to estimate a rack shaft axial force with reference to a roll rate of a vehicle body.

A suspension for a wheel of an axle of a motor vehicle, comprising a wheel support, which is mounted on the vehicle body via a plurality of links and which has a first supporting element and a second supporting element. A vehicle wheel is mounted rotatably on the first supporting element and the first supporting element is rotatable relative to the second supporting element for transmitting a steering torque by a steering actuator arranged on the wheel support. The first supporting element is attached to the vehicle body by an upper wishbone, and the second supporting element is attached to the vehicle body exclusively by a lower wishbone.

Provided are a steering function-equipped hub unit that has a simple structure, high rigidity and a reduced size, a steering system, as well as a vehicle including the steering function-equipped hub unit. The steering function-equipped hub unit includes: a hub unit main body including a hub bearing supporting a wheel; a unit support member provided to a knuckle of a suspension device and rotatably supporting the hub unit main body about a turning axis extending in a vertical direction; and a steering actuator configured to rotationally drive the hub unit main body about the turning axis. The hub unit main body is supported by the unit support member through a preloaded rolling bearing.

Provided is a steering system capable of enhancing traveling stability when a vehicle drives straight and improving small-turn performance. The steering system includes: a first steering device; a second steering device including a mechanical section configured to individually steer each of left and right wheels by driving a steering actuator and a control section configured to control the steering actuator; and a vehicle information detection section configured to detect a velocity of the vehicle and a steering angle. The control section includes a turning angle control module configured to control the steering actuator pursuant to a predetermined rule in accordance with the velocity of the vehicle and the steering angle so as to control turning angles of the left and right wheels.

A dual-mode active rear-wheel steering device, including: a steering motor, a main shaft, an intermediate gear, a transmission gear, a planetary gear coupling mechanism and a mode switching assembly. An output end of the steering motor is provided with a first input gear. An end of the main shaft drives a first rear wheel to rotate by a two-stage gear transmission system and a first rear-wheel motion conversion mechanism, and the other end of the main shaft drives a second rear wheel to rotate by the planetary gear coupling mechanism and a second rear-wheel motion conversion mechanism. The intermediate gear, the transmission gear and a sun gear of the planetary gear coupling mechanism are provided on the main shaft. The intermediate gear meshes with the first input gear.

A suspension and traction system is described for a vehicle equipped with a frame and a propulsive element (92) by rolling on the ground. An electric actuator (M3) is used for determining a steering angle () of the propulsive element.