Abstract:
An apparatus and a method for controlling a rear wheel steering (RWS) system, may include determining, by a controller, whether an abnormality occurs in a rear wheel alignment based on information collected from the vehicle; determining, by the controller, a correction amount of the rear wheel alignment for correcting the abnormality occurring in the rear wheel alignment using predetermined data based on one or more of the information collected from the vehicle when the abnormality is determined to occur in the rear wheel alignment; correcting, by the controller, a rear wheel control position determined based on variable information related to an RWS control using the determined correction amount of the rear wheel alignment; and controlling, by the controller, an RWS actuator of the vehicle based on the corrected rear wheel control position, and an apparatus for controlling an RWS system.
Abstract:
Relates to a cylinder unit includes a rod and a housing, wherein the rod is guided on the housing so as to be displaceable along an adjustment axis, wherein a piston is fixed to the rod, which piston divides the interior space of the housing into a first chamber and a second chamber, wherein the housing has a safety outlet, and wherein the safety outlet is arranged such that the piston closes off the safety outlet in fluid-tight fashion when the rod is in a zero position.
Abstract:
The present disclosure relates to fault management apparatus and method for an independently controlled steering system in a four wheel drive system. The apparatus includes: a steering system unit that is disposed at four wheels of a vehicle, controls steering of the wheels, and collects and transmits the state information of the wheels; and a control unit that controls the steering system unit in accordance with the state information transmitted from the steering system unit. According to the present disclosure, when there is a fault in one or more wheels of a four wheel drive vehicle, it is possible to stabilize the vehicle body by actively adjusting the steering angles of the wheels that normally work and the speed of the vehicle in accordance with the fault environment.
Abstract:
A steering system for an autonomously driven vehicle and methods of steering the vehicle are disclosed. A main controller signals a secondary steering assembly to operate in a first phase when a power steering controller is in a first mode and a second phase to steer the vehicle when the power steering controller is in a second mode. The main controller signals a friction device to actuate to a disengaged position when the power steering controller is in the first mode and the secondary steering assembly is in the first phase, and to signal the friction device to actuate to an engaged position to secure a steering wheel in an initial position when the power steering controller is in the second mode and the secondary steering assembly is in the second phase to allow the secondary steering assembly to steer the vehicle.
Abstract:
A rear wheel steering system includes a rear rack shaft that slides in a vehicle-width direction to steer a pair of rear wheels, a recess formed in the rear rack shaft, and a pin member that is fitted into the recess from the outer side of the rear rack shaft, and is retracted to be disengaged from the recess. The pin member is fitted into the recess to lock sliding of the rear rack shaft in a neutral position, and the pin member placed in a retracted state is disengaged from the recess to cancel slide lock on the rear rack shaft. The rear rack shaft has guide grooves formed on respective sides of the recess in a longitudinal direction of the rear rack shaft so as to be contiguous with the recess, and used to guide the pin member, placed in the advanced state, toward the recess.
Abstract:
A rear wheel steering system includes a rack shaft, a neutral position locking apparatus that restricts the movement of the rack shaft in a rack axis direction, and a pin-driving device that drives a restriction pin. The neutral position locking apparatus has the restriction pin and a pin-receiving portion formed in the rack shaft. The restriction pin has a first pin-sidewall portion slanted with respect to a pin axis and a second pin-sidewall portion parallel to the pin axis. The pin-receiving portion has a first shaft-sidewall portion that contacts the first pin-sidewall portion when the position of the rack shaft in the rack axis direction is at a neutral position, and a second shaft-sidewall portion that contacts the second pin-sidewall portion when the position of the rack shaft in the rack axis direction is at a restriction position different from the neutral position.
Abstract:
A stabilizing device for axles of vehicles, such as motor vehicles, trailers, semi-trailers, or the like, including a hollow cylinder unit, which comprises a hollow cylinder containing a fluid therein, a piston unit with a piston which is arranged in the hollow cylinder and divides the hollow cylinder into at least two chambers, wherein the piston unit can slide relative to the hollow cylinder unit in that said piston unit can be moved from an original position to a deflected position, a pre-tensioning device which tensions the piston unit in the direction of the original position, and a control or regulating device which controls or regulates the fluid flow into/out of the chambers.
Abstract:
A steering device for adjusting a wheel turning angle of a wheel of a motor vehicle, in particular of a rear wheel, includes a wheel guide member via which a wheel carrier of the wheel is connected to a vehicle body, the wheel carrier being swivellable about an axis of rotation disposed parallel to the wheel plane and the wheel guide member being articulated to the wheel carrier at a distance from the axis of rotation and being adjustable in length by an electromechanical drive unit, the electromechanical drive unit being connected, on the one hand, via a push rod to a joint at the wheel carrier end in order to form a swivel bearing to establish a connection to the wheel carrier, and, on the other hand, to a joint at the vehicle body end to form a further swivel bearing to establish a connection to the vehicle body.
Abstract:
A variable toe angle control system for a vehicle that can be incorporated with a fail-safe mechanism. When a fault of the system is detected, at least one of toe-angle actuators is actuated to make toe angles of two wheels agree with each other. When one of the wheels has become fixed in position without regard to a control signal supplied to the corresponding actuator, the actuator for the other wheel is actuated so as to make the toe angles of the two wheels equal to each other. When at least one toe-angle sensor is found faulty, the actuators are both actuated until the actuators reach positions corresponding to stoppers. When information for determining target values of the toe angles of the right and left wheels is found faulty, the actuators are both actuated until the actuators reach positions corresponding to prescribed reference toe positions.
Abstract:
A steering system selectively operable in one of six modes: steer-by-wire with rear steering, steer-by-wire without rear steering, electronic power assist steering (EPAS) with rear steering, electronic power steering (EPAS) without rear steering, mechanical backup manual steering with rear steering, and mechanical backup manual steering without rear steering. The steer-by-wire system includes a driver interface system (DIS), a front road wheel actuator system (FRWAS), a rear road wheel actuator system (RRWAS), and a controller for monitoring and implementing the preferred control strategy. The steering system operates normally in a steer-by-wire mode. In each of the EPAS mode and manual mode, the controller causes a clutch mechanism to engage, thus creating a mechanical linkage between the steerable member and the rack and pinion system while maintaining rear wheel assisted steering. In the EPAS mode, one of the front road wheel actuator or the reaction torque generator is available to assist in the steering operation along with rear wheel steering. Alternatively, in the manual mode, both the DIS and the FRWAS are deactivated and the vehicle is steerable through mechanical device along with the rear wheel assisted steering.