Provided is an electric power steering device including: a front-wheel steering mechanism, which is provided to front wheels of a vehicle, and includes a front-wheel steering motor as a drive source; and a rear-wheel steering mechanism, which is provided to rear wheels of the vehicle, and includes a rear-wheel steering motor as a drive source, wherein the rear-wheel steering motor is configured to be a double-inverter three-phase duplex motor, the double-inverter three-phase duplex motor including two three-phase windings and two inverters each configured to individually drive one of the two three-phase windings. Therefore, the electric power steering device is capable of, even when a failure has occurred in the steering motor of the rear-wheel steering mechanism, maintaining a function of the rear-wheel steering mechanism to secure behavior stability of 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.

Methods, apparatus, systems and articles of manufacture are disclosed to perform a tank turn. An example vehicle includes a first wheel and a second wheel, the first wheel located on an end of a first axle, the second wheel located on an end of a second axle, the end of the first axle opposite to the end of the second axle, a first suspension coupled to the first wheel, a second suspension coupled to the second wheel, and a controller to drive the first axle in a first direction, drive the second axle in a second direction, the first direction different from the second direction, and decrease a first suspension load of the first suspension and a second suspension load of the second suspension.

An embodiment is a steering system including an in-wheel motor disposed on a wheel of a vehicle and configured to turn the wheel, a strut arm connecting the in-wheel motor and a vehicle body, a joint clutch on the vehicle body and configured to engage or disengage the strut arm to allow or disallow the strut arm to pivot about the vehicle body, and a controller configured to control the in-wheel motor and the joint clutch.

An all-wheel steering system for a motor vehicle is described which has an active front axle steering system and an active rear axle steering system. The front axle steering system includes a gear ratio unit which is coupled to a steering wheel. The gear ratio unit is configured to define a front axle steering angle as a function of a steering wheel angle and a front axle steering ratio. In addition, the gear ratio unit is coupled to the rear axle steering system in such a way that the front axle steering ratio is adjustable as a function of a rear axle steering angle. Further, a motor vehicle having such an all-wheel steering system is discussed. Also presented is a method of operating an all-wheel steering system for a motor vehicle.

A method for operating an industrial truck having three wheels. During longitudinal travel, two steerable wheels run in succession in a first lane, and a third wheel runs in a second lane. The third wheel initially runs on an inside during a turning in while cornering until the industrial truck, during a further turning in, transitions into a revolving motion. The method includes reducing a drive power as of a specific steering angle during the turning in prior to the revolving motion, and disengaging or reversing a direction of a drive rotation of the third wheel after a delay time which begins with the reducing of the drive power, or, continuously reducing the drive power from the specific steering angle during the further turning in, and disengaging or reversing the direction of rotation of the third wheel when transitioning into the revolving motion.

In one embodiment, a vehicle system includes a chassis and a vehicle bed coupled to the chassis. The vehicle bed includes an attachment system configured to fasten a detachable mission platform onto the vehicle bed. The vehicle system further includes a plurality of wheels coupled to the chassis and configured to carry the chassis over a ground. The vehicle system further includes a control system. The control system includes a processor configured to determine a mission type for the detachable mission platform. The processor is also configured to load a set of instructions specific to the mission type to a memory of the control system. The processor is also configured to instruct the detachable mission platform to actuate at least one actuator based on the set of instructions.

A technology of mechanically classifying a switching operation between a traveling mode and a special moving mode is provided to prevent a mode switching misoperation. A traveling mode switching mechanism of a four-wheel independent steering type vehicle includes a shift gate which is disposed by forming a moving path of a shift lever, and grouping a traveling mode and a special moving mode. Additionally, a mode switching differentiation devices differentiates a mode switching operation of a driver by configuring so that an operation of the shift lever switched between the traveling mode and the special moving mode is physically different from an operation of the shift lever switched between the traveling modes or between the special moving modes.

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.

A dual-mode active rear-wheel steering device, including: a steering angle control motor, a speed-reduction mechanism, a differential mechanism assembly, two steering motion conversion mechanisms, a first electromagnetic clutch and a second electromagnetic clutch. An output end of the steering angle control motor is connected to the speed-reduction mechanism. The differential mechanism assembly is a bevel gear differential, in which center holes at outer ends a two half shafts are respectively provided with a raceway to form an inner cyclical ball-lead screw-nut pair with a first lead screw and a second lead screw of the steering motion conversion mechanisms. The first lead screw and the second lead screw are the same in parameters but with opposite rotation direction. The first electromagnetic clutch controls connection between a differential housing and a frame. The second electromagnetic clutch controls connection between the differential housing and the second half shaft.