The four wheel steering vehicle utilizes a cage system that extends along the longitudinal axis to protect the driver coupled to a center rail chassis. Front and Back independent suspension links extend outward along the lateral axis pivotally connected to the wheel assemblies enabling four wheel independent suspension. A centrally located pivoting shock provides both steering control and suspension attachment for the shock and spring. The vehicle is controlled by the driver using a steering wheel, acceleration pedal, and a brake pedal. The invention provides a feeling of integration with the vehicle as the driver rolls into turns with the vehicle, while minimizing fatigue caused by the continuous resistance to centrifugal cornering forces.

An embodiment composite material spring for a suspension device of a vehicle includes a leaf spring configured to be installed in a body of the vehicle and a wheel of the vehicle, a first fluid container installed at a left side of a center of the leaf spring and including a first magnetorheological fluid, and a second fluid container installed at a right side of the center of the leaf spring and including a second magnetorheological fluid.

A four-wheeled vehicle includes: a frame; two front suspension assemblies and two rear suspension assemblies connected to the frame; two front wheels operatively connected to corresponding ones of the two front suspension assemblies; two rear wheels operatively connected to corresponding ones of the two rear suspension assemblies; a motor connected to the frame; a front differential and a rear differential operatively connecting the motor to the two front wheels and the two rear wheels respectively; and a steering system. The steering system includes a front steering assembly for steering the front wheels and a rear steering assembly for steering the rear wheels. The front steering assembly includes a user-operated steering input device. The rear steering assembly includes an actuator operatively connected to the rear wheels and operable to modify a steering angle thereof. The actuator is mounted to the frame and is disposed completely rearward of the rear differential.

An electromechanical brake system having a suspension control function. The electromechanical brake system includes: an electromechanical brake connected to each wheel of a vehicle to brake the vehicle, a suspension configured to control suspension of the vehicle, a motor configured to provide driving force to the electromechanical brake or to the suspension, a first clutch configured to connect the electromechanical brake and the motor to each other, a second clutch configured to connect the suspension and the motor to each other, and a controller configured to output a control signal for controlling the motor to be connected to one of the first clutch and the second clutch based on a state signal of the vehicle.

An independent suspension system includes a steering unit configured to be controlled to adjust the steering angle of a wheel, a shock absorber engaged with the wheel in order to absorb external impacts applied to the wheel and including first and second shock absorbers, each of the first shock absorber and the second shock absorber arranged in a forward-rearward direction on opposite side surfaces of the wheel, respectively, and a link unit disposed between the shock absorber and the steering unit in order to vary the distance between the wheel and the steering unit. The link unit includes a first upper arm disposed between the first shock absorber and the steering unit, a second upper arm disposed between the second shock absorber and the steering unit, and a ground clearance adjustment unit engaged with the first and second upper arms and configured to vary the distance therebetween while varying the distance between the wheel and the steering unit at the same time.

An independent suspension system includes: a steering unit configured to adjust the steering angle of a wheel; a shock absorber engaged with the wheel in order to absorb impacts applied to the wheel and including a first shock absorber and a second shock absorber, each of which being arranged in a forward-rearward direction on opposite side surfaces of the wheel; and a link unit disposed between the shock absorber and the steering unit in order to vary the distance between the wheel and the steering unit. The link unit includes a first upper arm disposed between the first shock absorber and the steering unit, a second upper arm disposed between the second shock absorber and the steering unit, and a ground clearance adjustment unit engaged with the first and second upper arms in order to vary the distance between the first and second upper arms.

A suspension control device which controls an operation of a suspension of a vehicle includes an operation-induced state quantity estimation portion which estimates an operation-induced state quantity caused by an operation of a vehicle, a road surface-induced state quantity estimation portion which estimates a road surface-induced state quantity caused by a road surface, an operation-induced state quantity conversion portion which converts the operation-induced state quantity into an operation-induced required damping force, a road surface-induced state quantity conversion portion which converts the road surface-induced state quantity into a road surface-induced required damping force, and a current value calculation portion which determines a current value to be applied to the suspension with reference to the operation-induced required damping force and the road surface-induced required damping force.

Provided is a steering function-equipped hub unit including: a hub unit body including a hub bearing; a unit support member configured to be provided to a chassis frame component, the unit support member supporting the hub unit body such that the hub unit body is rotatable about a turning axis extending in a vertical direction; and a steering actuator configured to rotationally drive the hub unit body about the turning axis, wherein the hub bearing includes an outer race integrally provided with turning shaft parts protruding upward and downward in the vertical direction on an outer peripheral surface of the outer race, each of the turning shaft parts having an axis coinciding with the turning axis, and the hub unit body is rotatably supported by the unit support member through the turning shaft parts.

An amphibious multi-terrain water planing vehicle including: a. a hull having a top, a bottom, a front end, a rear end, a first side and a second side; b. at least one track frame, in exemplary embodiments a pair of track frames, mounted to the hull; c. a sole propulsion and water planing device including at least one continuous rotatable track having an outside surface and an inside surface, in exemplary embodiments a pair of continuous rotatable tracks, mounted to the at least one track frame, in exemplary embodiments each of the pair of continuous rotatable tracks mounted to each of the pair of track frames; the at least one continuous rotatable track, in exemplary embodiments the pair of continuous rotatable tracks not vertically adjustable relative to the hull wherein the vehicle when transitioning from land to water and vice versa requiring no modification, and wherein the vehicle is able to plane on water from a stand still position.

An apparatus for controlling a suspension of a vehicle includes: the electronically controlled suspension arranged between wheels and a vehicle body and configured to increase or decrease a contact force between a tire of the vehicle and a road surface; and a controller that adjusts a height of the vehicle depending on a type of road when it rains and adjusts an operating time of the suspension based on a lateral acceleration of the vehicle.