摘要:
A four-wheel-steering system includes a rear wheel steering mechanism for turning rear wheels in response to energization of an actuator. A locking device is responsive to de-energization of the actuator for locking gears and a rack shaft to prevent the rear wheels from being turned. The locking device includes a longer arm on which first and second gears are rotatably mounted, a shorter arm pivotally coupled to the longer arm, a stopper coupled to the shorter arm and engageable with the second gear, and a spring acting on the stopper for normally urging the stopper into engagement with the second gear, the actuator comprising an electric motor angularly movable with respect to the second gear.
摘要:
A steering gear box mount includes a resilient member interposed between a motor vehicle body and a steering gear box for allowing movement of the steering gear box. The mount also has a structure for limiting allowed movement of the steering gear box. The structure includes a mechanism for selectively fixing the steering gear box to a motor vehicle body, or a mechanism for continuously adjusting the allowed movement of the steering gear box.
摘要:
A front and rear wheel steering system for a vehicle which transmits a steering input from a front wheel steering gear box to a rear wheel steering gear box via a coupling shaft as a rotation thereof around its longitudinal line and varies a steering gear ratio of rear wheels to front wheels according to the speed of the vehicle. A steering rod for steering the rear wheels with its longitudinal movement is provided with a crank portion which is engaged with a swing shaft pivotally attached to the coupling shaft via a pivot shaft perpendicular thereto so as to perform a gyrating motion around an extension line of the coupling shaft and thereby move the steering rod along its longitudinal direction to achieve a steering action of the rear wheels. The steering rod can be rotated around its longitudinal line according to the vehicle speed so as to displace the crank portion relative to the extension line of the coupling shaft and change the relationship between the rotational angle of the coupling shaft or the steering input to the front wheel steering gear box and the longitudinal movement of the steering rod or the steering angle of the rear wheels.
摘要:
A method of and an apparatus for controlling rear road wheel camber of a four-wheel-steerable vehicle having front and rear road wheels steerable in the same or opposite directions. The camber with respect to ground of at least the rear road wheel on the outer side of a cornering curve followed by the vehicle is controlled. The apparatus includes detectors for detecting the direction in which the rear road wheels are steered with respect to the front road wheels, the self-aligning torque on the front road wheels, and the steering force acting on a steering wheel, camber varying devices associated with rear wheel suspensions, actuators for operating the camber varying devices, and a control unit responsive to detected signals from the detectors for applying a control signal to at least one of the actuators to control the camber of at least the rear road wheel on the outer side of the cornering curve when the rear wheels are steered.
摘要:
The steering operation of a motor vehicle with steerable front and rear road wheels is controlled by steering the rear road wheels with an actuator such as an electric motor which produces a steering force dependent on a deviation of the actual rear wheel steering angle from a target rear wheel steering angle. The rear road wheels are thus controlled with a characteristic dependent on the coefficient of friction of a road on which the motor vehicle travels and the steering speed at which the motor vehicle is steered. Typically, a steering control method comprises the steps of detecting the steering angle of the front road wheels, determining a target steering angle for the rear wheels based on the steering angle of the front road wheels, detecting the actual steering angle of the rear road wheels, calculating a steering angle deviation of the actual rear wheel steering angle from the target steering angle, determining a rear wheel steering force based on the steering angle deviation, and steering the rear road wheels to the target steering angle with the determined rear wheel steering force.
摘要:
An automobile suspension includes a suspension member coupled to a vehicle body, a disc-shaped actuator mechanism detachably supported on the suspension member, and a knuckle having a swingable support shaft swingably supported for swinging movement about a central pivot through which the axis of the disc-shaped actuator mechanism passes, the knuckle being adapted to support a wheel rotatably. The disc-shaped actuator mechanism includes a pair of actuators disposed thereon at respective positions spaced substantially equally from the central pivot and located on at least one straight line passing through the central pivot, the actuators pivotally supporting the knuckle, respectively, for causing the knuckle to be angularly moved about the central pivot.
摘要:
A steering system for a motor vehicle having front road wheels and rear road wheels which are steerable includes a rear wheel steering mechanism for steering the rear road wheels based on a vehicle speed and a front wheel steered angle. The rear wheel steering mechanism, has a correcting mechanism fo varying a rear wheel steering force dependent on the vehicle speed.
摘要:
A rear wheel steering device in a four-wheel-steerable vehicle includes a rod member having opposite ends coupled to tie rods for turning rear wheels, an electric motor, and a screw mechanism for converting rotation of the electric motor to axial motion of the rod member. The stator and rotor of the electric motor are disposed coaxially with the rod member, the motor and the screw mechanism being juxtaposed with respect to each other in the axial direction of the rod member. The screw mechanism comprises a threaded portion on the rod member and a nut engaging the threaded portion, the nut being axially pre-loaded.
摘要:
A steering angle detector comprises a differential transformer. The steering angle detector includes a rod member extending substantially transversely of the vehicle body and axially movable in response to steering action of the vehicle body, a metallic core mounted on the rod member, and primary and secondary coils disposed around the core in slightly spaced relation thereto.
摘要:
A steering gear box mount includes a resilient member interposed between a motor vehicle body and a steering gear box for allowing movement of the steering gear box. The mount also has a structure for limiting allowed movement of the steering gear box. The structure includes a mechanism for selectively rigidly fixing the steering gear box to a motor vehicle body, or a mechanism for continuously adjusting the allowed movement of the steering gear box.