1719results about "Mechanical steering" patented technology

Provided is a steer-by-wire steering system (1) for a vehicle (2) that can appropriately bring the steered angle of the wheels to a prescribed relationship to the steering angle of a steering member (10) even when the steering angle of the steering member was changed while the vehicle was parked. When the steered angle of the wheels deviates from the prescribed relationship with the steering angle of the steering member upon startup (ST2: Yes), the control unit (15) drives at least one of the steering actuator (12) and the reaction force actuator (13) to bring the steered angle (α) of the wheels closer to the prescribed relationship with the steering angle (β) of the steering member (ST12) using a change in the transmission shift position from the park position (P) or the neutral position (N) to the travel position (D or R) as a trigger (ST8: Yes).

A steering system includes a steering wheel rotation limiting device being arranged radially offset to the steering wheel hub and including a base being fixed to the or another non-rotatable component of the steering system and a sliding element. The base includes two opposing end stop surfaces, and the sliding element is axially slidable parallel to the axis of rotation relative to the base and relative to the steering wheel hub between the two opposing end stop surfaces. The sliding element includes a projection that engages a spiral groove formed on a circumferential surface of the steering wheel hub so that rotation of the steering wheel hub causes axial movement of the sliding element, and so that abutment of the sliding element with one of the two end stop surfaces blocks movement of the sliding element and rotation of the steering wheel hub.

The invention relates to a method (1) for a force feedback system for a steering device, in particular a steer-by-wire steering device, of a vehicle, wherein the force feedback system comprises at least one brake unit and one drive unit, wherein the method (1) comprises the following steps: receiving a steering angle (LW) and at least one vehicle operating parameter (P_FZ); determining a target total torque (M_Soll) for the force feedback system based on the received steering angle (LW) and the at least one received vehicle operating parameter (P_FZ); determining a first target partial torque (TM1_Soll) for a brake unit and the drive unit, based on a characteristic map (KF_TM1);and determining a second target partial torque (TM2_target) for the other from the brake unit and the drive unit, such that a sum of the first target partial torque (TM1_target) and the second target partial torque (TM2_target) substantially corresponds to the target total torque (M_target).

A system including a computer having a processor and a memory. The memory includes instructions executable by the processor to, upon actuating movement of a steering element of a vehicle, measure a torque applied to the steering element in a direction opposite the actuated movement. In response to a determination that the torque is less than a predetermined threshold, the processor actuates a component of the vehicle.

A system for collaborative steering in steer-by-wire (SBW) vehicles includes sensors, a rack motor altering a position of the vehicle's steerable road wheels and an emulator altering a torque and position of a vehicle hand wheel. A collaborative steering system application (CSSA) obtains, static and dynamic information about the vehicle and the vehicle's environment, and generates a rack torque and / or angle command to the rack motor and an emulator torque and / or angle command to the emulator. The CSSA adjusts between ADAS and manual steering ratios and automatically transitions control between ADAS SBW control and manual control. The CSSA smooths transitions between ADAS SBW control and manual steering control and adjusts hand wheel stiffness by altering the emulator torque command, and causes the rack motor and emulator to operate according to a kinematic model while adapting road wheel response and vehicle operator steering feel based on scenarios and features currently enabled.

Provided are a method and apparatus for controlling the steering of rear wheels, and a vehicle and a storage medium. The method for controlling the steering of rear wheels comprises: when a front-wheel steering-by-wire system fails, determining a steering control quantity of a steering wheel; on the basis of the steering control quantity, a target transmission ratio between the steering wheel and front wheels, and a yaw direction value, determining a target steering control quantity of rear wheels; and on the basis of the target steering control quantity, controlling the steering of the rear wheels. Since yaw is generated during the steering of front wheels, a yaw direction value is introduced when a target steering control quantity is determined, such that the same steering effect can be produced during the steering of the rear wheels and the steering of front wheels. Therefore, when a front-wheel steering-by-wire system fails, the method can not only aid, by means of the rear wheels, a vehicle in meeting steering requirements, but can also achieve a steering effect the same as that of the front wheels, thereby conforming to the steering habit of a vehicle user.

A steering apparatus includes a first CAN communication line provided between a steering input mechanism and a steering mechanism controller and configured to output a first steering operation amount signal output from a first steering operation amount signal output portion to the steering mechanism controller, and a communication line provided between the steering input mechanism and the steering mechanism controller and configured to output a second steering operation amount signal to the steering mechanism controller without intervention of a first microprocessor.

A steer by wire includes a steering wheel holding system. An emulator controller receives vehicle data from vehicle systems and determines whether a vehicle is in one of a driving mode and a non-driving mode. When the vehicle is in the driving mode, the emulator controller transmits a command to an emulator switching system to electrically couple the phases of an emulator motor to a power source to enable the emulator motor to implement steer by wire operations placing the steering wheel in an un-hold mode. When the vehicle is in the non-driving mode, the emulator controller transmits a command to the emulator switching system to electrically couple the phases of the emulator motor to ground to short the phases of the emulator motor to ground to generate a resistive torque to resist rotational movement of a steering wheel of the vehicle placing the steering wheel in a hold mode.

An auxiliary steering device for a hydrostatic vehicle steering system, includes an input shaft, which can be actuated or set in rotation by a steering wheel, an output shaft for actuating a steering metering valve, and a planetary gearing. The planetary gearing includes a planetary wheel carrier with multiple planetary wheels, which mesh with a sun gear and a surrounding ring gear. The input shaft is connected to the planetary wheel carrier and the output shaft is connected to the sun gear in each case for conjoint rotation. The auxiliary steering device has an electric drive for exerting a torque on the ring gear, a braking device for fixing the input shaft, and a coupling device for producing a rotationally fixed connection between the output shaft and the planetary wheel carrier.

To provide a method for operating a steering device of a motor vehicle according to the steer-by-wire principle.SOLUTION: A steering device (1) comprises a rotatable steering handle (2), in particular steering wheel, to provide a steering request. The steering device (1) comprises an electric machine (3) mechanically coupled to the steering handle (2). The electric machine (3) is drive-controlled in an active state of the steering device (1) to generate a reset torque counteracting a rotational movement of the steering handle (2), and the machine (3) is drive-control free in an idle state of the steering device (1). In the idle state, an electrical voltage of the electric machine (3) is detected to determine a rotational movement of the steering handle (2), and if the electrical voltage reaches a predetermined threshold value, in particular exceeds it, the active state is activated.SELECTED DRAWING: Figure 1

A steering system includes: an operation device including an operation member and a reaction force application device; a turning device mechanically cut off from the operation device and configured to turn a wheel according to a control current; and a controller configured to control the turning device and the reaction force application device based on an operation signal relating to an action of the operation member. The steering system is configured to switch between a normal mode of turning the wheel based on the operation signal and a virtual mode of steering a virtual mobile body based on the operation signal. In the virtual mode, the controller sets the control current to a current value at which the wheel does not turn regardless of the operation signal, and sets the operation reaction force based on a predetermined oscillation component of a signal received from the turning device.

The invention provides a method and device for controlling steering of rear wheels, a vehicle and a storage medium. When a front wheel steer-by-wire system of the vehicle breaks down, the front wheel steer-by-wire system cannot control front wheel steering. Therefore, rear wheel intervention is needed to achieve vehicle steering. According to the scheme, when the front wheel steer-by-wire system fails, the steering control quantity of a steering wheel is determined; a target steering control amount of the rear wheels is determined based on the steering control amount, a target gear ratio between the steering wheel and the front wheels, and the yaw direction value. Due to the fact that yawing can be generated in front wheel steering, the yawing direction value is introduced when the target steering control quantity is determined in the scheme. Therefore, the steering effect of the rear wheel is the same as that of the front wheel. A target angle value for rear wheel rotation is also determined based on the steering control amount and the target gear ratio. Therefore, according to the scheme, when the front wheel steer-by-wire system fails, the vehicle can be assisted by the rear wheels to meet the steering requirement, the steering effect the same as that of the front wheels is achieved, and the steering habit of a vehicle user is met.

The disclosure relates to a steering unit for a steer-by-wire steering system of a motor vehicle, having a steering shaft which can be rotated by a driver, and a spindle drive which interacts with the steering shaft to limit a steering angle of the steering shaft, wherein the spindle drive has a spindle and a spindle nut screwed onto the spindle, wherein the spindle nut is displaceable with a movement component in the axial direction relative to the spindle when the spindle is rotated, wherein the spindle nut has a first spindle stop for tangentially striking against a first end stop fixed to the spindle, wherein the first end stop is formed integrally with the spindle. The number of components is thus reduced, and the structure of the steering unit is simplified, as a result of which the effort for production and assembly is reduced, and cost-effective production of the steering unit is made possible.

Example steering wheel actuator device for a steer-by-wire steering system of a vehicle are disclosed herein. An example steering wheel actuator device includes at least one steering wheel angle measuring device to measure a steering wheel angle of a steering wheel, a motor device to generate a motor torque counteracting a driver torque applied to the steering wheel, a control device, and an electrical energy source that supplies the steering wheel actuator device with electrical energy. The actuator device has an electrical energy storage device is configured to supply at least one steering wheel angle measuring device with stored electrical energy if the steering wheel actuator device is not supplied with electrical energy by the electrical energy source. The electrical energy storage device can preferably be charged with electrical energy generated by the motor device if the applied driver torque surpasses the motor torque.

A steering column for a steer-by-wire steering system for a motor vehicle, comprising a steering wheel (1) having a fixed-position steering wheel hub (2) and a force feedback unit capable of transmitting torque to the steering wheel (1), the force feedback unit comprising a first electric motor (3) and a second electric motor (12), the first electric motor (3) acting directly on the steering wheel (1) and the second electric motor (12) acting on the steering wheel (1) via a transmission (13).

The invention relates to a drive device (6) for a steering device (5) for steering a first steerable wheel (2) and a second steerable wheel (3) of a motor vehicle (1), which form a left wheel and a right wheel of the motor vehicle (1), - with a housing (7) for fastening the drive device (6) to the motor vehicle (1), - with a first steering rod (11) which can be coupled to the first steerable wheel (2) for steering the first steerable wheel (2) and which is axially adjustable in the housing (7) and arranged in a rotationally fixed manner with respect to the housing (7), - with a second steering rod (13) which can be coupled to the second steerable wheel (3) for steering the second steerable wheel (3), - with a main actuator (15) for axially adjusting the first steering rod (11) relative to the housing (7), which is arranged in a fixed position on the housing (7), - with a sliding sleeve (16) which is axially adjustable in the housing (7) and arranged in a rotationally fixed manner relative to the housing (7) and which is axially fixedly coupled to the first steering rod (11) and rotatably relative thereto, - with an additional actuator (41) for rotatingly adjusting the sliding sleeve (16) relative to the housing (7), which is arranged in a fixed position on the housing (7), - wherein the second handlebar (13) is coupled to the first handlebar (11) in a rotationally fixed manner and axially adjustable relative thereto and coaxially passes through the sliding sleeve (16) and is drive-coupled to the sliding sleeve (16) in such a way that a rotational adjustment of the sliding sleeve (16) relative to the housing (7) produces an axial adjustment of the second handlebar (13) relative to the sliding sleeve (16).

The present invention relates to a method for maneuvering a vehicle (100) with a defect (106) on a single-wheel steering actuator (102) of a driven wheel (104) of the vehicle (100), wherein for maneuvering a torque on the wheel (104) is set as a function of a steering angle of an opposite wheel (104) of the vehicle (100).

A dual motor drive assembly comprising a housing, a shaft rotatably mounted with respect to the housing, a first gear connected to and configured to rotate with the shaft, first and second motors, each having an output driving a respective output gear, the output gears being engaged with the first gear, an allocation arrangement for allocating torque demands to each of the first and second motors, a target friction detection arrangement for determining a target friction, a calculation arrangement for calculating a mechanical friction, wherein the target friction and mechanical friction are compared, and wherein the mechanical friction is modified to meet the target friction by varying the difference between the two motor torque demands when the two motor torques are in opposing directions.

Disclosed examples include setting a coupling resistance between a road wheel actuator and a steerable road wheel of a vehicle at a first time by controlling an electrical damping device to increase an electrical resistance of an electric motor of the road wheel actuator; and changing the coupling resistance between the road wheel actuator and the steerable road wheel at a second time by controlling the electrical damping device to further increase the electrical resistance of the electric motor of the road wheel actuator.

An agricultural vehicle includes a steering input device configured to steer the agricultural vehicle to perform a turn. The agricultural vehicle includes a steering control system configured to operate the steering input device. The steering control system includes processing circuitry. The processing circuitry is configured to receive a steering input indicating a curvature to be performed by the agricultural vehicle. The processing circuitry is configured to operate the steering input device using a primary curvature model of the agricultural vehicle and the steering input. The primary curvature model of the agricultural vehicle is configured to predict a steering condition of the steering input device to perform the steering input. The primary curvature model comprising a non-linear relationship between curvatures and steering conditions of the steering input device

The present invention relates to a method for operating an electromechanical steering system (1) of a motor vehicle (2). According to the method, a communication fault between a first control device (7) and a second control device (9) is first detected, and the first control device (7) applies a predefined excitation pattern to an electric motor (3), which is then detected by the second control device (9). In this way, communication between the first control device (7) and the second control device (9) is ensured even in the event of a communication link (6) failure. The invention further relates to an electromechanical steering system (1) for a motor vehicle (2) and a motor vehicle (2).

A method includes determining a current slew rate associated with a motor of the steering column, determining a speed slew rate associated with the motor, determining a current and speed slew rate threshold for the motor, and determining whether the current slew rate or the speed slew rate indicates a pinch event based on a comparison of the current slew rate, the speed slew rate, and the current and speed slew rate threshold. The method also includes, in response to a determination that at least one of the current slew rate and the speed slew rate indicates a pinch event, selectively instructing the motor to one of stop operation and reverse operation for a calibration period and, in response to the pinch event having a magnitude that is less than a pinch event threshold, selectively instructing the motor to continue operation.

A steering input device for controlling a vehicle according to the steer-by-wire concept. A power train has a moveable steering unit and a drive device with a drive motor for generating a torque acting on the steering unit. The power train also has a controllable magnetorheological coupling device with two coupling components that can be rotated relative to one another. The coupling device is connected in series with the drive device in the power train. A torque can be transmitted between the drive device and the steering unit by the coupling device and can be changed in a targeted manner.

The invention relates to the technical field of vehicles, and discloses a multifunctional steer-by-wire hand feeling simulator which comprises a steering column and an upper steering mandrel assembly arranged in the steering column, and the upper steering mandrel assembly is connected with a steering wheel through a spline. A speed reducing mechanism, a telescopic adjusting mechanism, an angle adjusting mechanism and an angle limiting mechanism are arranged on the steering column, the speed reducing mechanism is used for providing damping for the steering wheel to guarantee the road feeling, the telescopic adjusting mechanism is used for automatically adjusting the telescopic steering wheel, and the angle adjusting mechanism is used for adjusting the angle of the steering wheel. The angle limiting mechanism is used for limiting the number of turns of the steering wheel. The invention has the following advantages and effects: the driving experience of a driver can be improved, the driving space is saved, and the comfort level is improved.

A steer-by-wire control system adapted for use with a material handling vehicle such as a forklift includes a controller programmed to receive input indicative of a desired direction of travel of the material handling vehicle and to control an actuator coupled with the steered wheels of the material handling vehicle to change the direction of travel of the vehicle and synchronize the direction of travel with a position of a steering wheel of the material handling vehicle.

A control system for a four-wheel independent steering system includes at least one sensor configured to detect at least one of a shift position of a joystick, mounted on the four-wheel independent steering system, or a driving speed of a vehicle, and a position controller configured to control a position of the joystick based on sensing data detected by the at least one sensor.

A steering actuator apparatus for a vehicle may include: a housing, a driving unit configured to be supported by the housing and generates a driving force, a transmission shaft, which is installed inside the housing to be movable, moves back and forth by receiving the driving force from the driving unit, and varies a steering angle of a wheel, a measurement unit configured to measure the steering angle of the wheel in conjunction with a movement of the transmission shaft, a first rotation prevention unit provided between the housing and the transmission shaft and fixed to the transmission shaft and a second rotation prevention unit, which is detachably coupled to an outside of the housing and interferes with the first rotation prevention unit to prevent relative rotation of the housing and the transmission shaft.

A steer-by-wire system for a vehicle includes a rack moveable in an axial direction and defining a groove extending in the axial direction of the rack. The system also includes a housing surrounding at least a portion of the rack. The system further includes an anti-rotation device disposed proximate an outer surface of the rack at the mounting location of the rack and within the housing, the anti-rotation device comprising a bearing seated within the groove of the rack. The system yet further includes a delash bearing assembly in contact with the rack to radially bias the rack to a desired position.

The embodiments relates to a steering control device and method. Specifically, a steering control device according to the embodiments may include a first steering control module receiving a steering angle of a steering wheel from a steering angle sensor, calculating a position of a rack corresponding to the steering angle, and transmitting the position of the rack to a road wheel actuator (RWA) and a second steering control module to which a control right for the first steering control module is transferred when the first steering control module is determined to have a failure.