The disclosure relates to a steering control device and method. According to the disclosure, a steering control device comprises a receiver receiving a steering angle and a steering torque of a steering wheel and a reaction force generator calculating a breaking torque based on the steering angle and steering torque of the steering wheel and a reaction torque corresponding to the steering angle of the steering wheel and outputting a command current to allow a reaction force motor to output the calculated breaking torque.

An apparatus for use in turning steerable vehicle wheels includes a steering column having a pinion connected with a vehicle steering wheel such that rotation of the steering wheel results in rotation of the pinion. An electrically powered steering unit includes an electric motor having a first output shaft rotatable about an axis. A first planetary gear stage has a first gear reduction ratio and is driven by the first output shaft. A second planetary gear stage is driven by the first planetary gear stage and the pinion and has a second gear reduction ratio different from the first gear reduction ratio. A second output shaft is driven by the second planetary gear stage and coupled to the steerable wheels such that rotation of the second output shaft affects steering of the vehicle wheels.

A hoisting machinery comprises a steering wheel and wheels, wherein the active steering system comprises an active steering device, a hydraulic power steering gear and a hydraulic power steering system, the active steering device is arranged between the steering wheel and a pitman arm of the hoisting machinery, so as to adjust a steering ratio of the steering wheel to the pitman arm according to a driving cycle of the hoisting machinery, and the hydraulic power steering gear is arranged between the steering wheel and the pitman arm, so as to control the hydraulic power steering system to drive steering of the wheels. In the active steering system of the present invention, a hydraulic power steering system is adopted to drive steering of wheels, which can improve capability of overcoming steering resistance and can be applicable to multiple chassis of cranes, thereby enlarging application ranges of the active steering system.

A differential cooperative active steering system for a front-axle independent-drive vehicle with electric wheels includes a steering rack which is arranged between a first steering wheel and a second steering wheel, and is able to generate lateral displacement and pull the first and second steering wheels to steer; a planetary gear mechanism, including a first input end, a second input end and an output end; a steering angle coupling motor, connected to the first input end; and an input shaft of the steering wheel, connected to the second input end. The planetary gear mechanism can realize the coupling between an input steering angle of an input shaft of the steering wheel and an input steering angle of the steering angle coupling motor. In addition, a method for controlling the differential cooperative active steering system is provided.

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 power assisted steering system provides a gear reduction between a steering wheel and a steering mechanism and a much larger gear reduction between an electric motor and a steering mechanism. The system is back-driveable from the steering mechanism. The system utilizes a ball-screw, several helical gears, and two bevel gears. A rack fixed to the ball-screw nut drives a sector gear.

An actual steering ratio, which is a linkage relationship between a steering target wheel and a steering wheel, is controlled based on a setting steering ratio. Then, when a “mismatch” occurs between the actual steering ratio and the setting steering ratio due to an emergent avoidance motion, a steering control apparatus corrects the setting steering ratio using a corrected steering ratio so as to reduce the “mismatch”, thereby improving the consistency of the linkage relationship between a driver's steering operation and the steering target wheel, allowing the relationship between a rotational angle of the steering wheel and a steering angle of the steering target wheel to match the steering ratio, and thus reducing an uncomfortable feeling evoked in a driver.

An embodiment driving module includes a drive unit including a wheel and a drive motor configured to operate the wheel, a suspension unit having a first side coupled to the drive unit, and a steering unit configured to steer the wheel and having a side coupled to a second side of the suspension unit.

A driver assistance system for a vehicle includes a steering assistance system for autonomously generating steering commands, a first actuating drive for adjusting a steering angle on a steerable wheel of the vehicle corresponding to the steering commands and a steering wheel that is rotatable coupled to the steering angle by a second actuating drive. The steering assistance system actuates the second actuating drive in order to favor a low-frequency component of a frequency spectrum of changes of the steering angle in the rotation of the steering wheel than a high-frequency component of the frequency spectrum.

An emergency steering system for a vehicle, may include a planetary gear mounted in an inlet space of a gear box for a steering apparatus so that the planetary gear is ordinarily operated at a gear ratio of 1:1 and has an increased gear ratio in the event of failure of a main steering device; and a gear ratio increasing device mounted to an upper plate portion of the gear box to increase the gear ratio of the planetary gear.