Class / Patent application number | Description | Number of patent applications / Date published |
180402000 | No mechanical connection between steering shaft and steering gear | 32 |
20080230300 | Steering Control Apparatus and Method - A vehicle steering control device is provided that suppresses changes in the steering force accompanying the shock transmitted from the road surface during the steering wheel return operation. The vehicle steering device is a steer-by-wire steering device where a steering wheel receiving the steering input which is transmitted electronically to the steering unit which turns steered road wheels of the vehicle. The steering reaction force correction (Gf×F) corresponding to road surface reaction force F is applied to the steering wheel. The device includes a turn/return sensor that senses turn/return of the steering wheel, and during return of steering wheel, road surface reaction force feedback gain Gf is made smaller than the initial turning. | 09-25-2008 |
20080289897 | Steering Apparatus for a Vehicle Having Front and Rear Steerable Wheels - An apparatus ( | 11-27-2008 |
20090050397 | STEERING SYSTEM FOR VEHICLE - A steering system including a pair of operating members operable independently of each other, wherein a target wheel-turning amount and a return force for returning operating members to their reference position are determined based on an operation amount of the operating members. At least either a steering gain, set for each pair of operating members upon determination of the target wheel-turning amount, or a return-force gain, set for each pair of operating members upon determination of the return force, is made changeable depending on various parameters. Steering characteristics can be set relatively freely. For example, where the steering gain is made changeable depending on an operating angle of the operating member, determination of the target wheel-turning amount can be made with a changeable degree of contribution of operation of each operating member, which is changeable depending on an operating position of the operating member. | 02-26-2009 |
20090071743 | Electrical steering system for vehicle - A ground contact system ( | 03-19-2009 |
20090101429 | Steer-by-wire steering apparatus with actuatable mechanism - A steering apparatus ( | 04-23-2009 |
20090194357 | MATERIALS HANDLING VEHICLE HAVING A STEER SYSTEM INCLUDING A TACTILE FEEDBACK DEVICE - A materials handling vehicle is provided comprising a frame comprising an operator's compartment, wheels supported on the frame, at least one of the wheels being a steerable wheel, and a steer-by-wire system associated with the steerable wheel to effect angular movement of the steerable wheel. The vehicle further comprises a control apparatus. | 08-06-2009 |
20090194358 | MATERIALS HANDLING VEHICLE WITH A MODULE CAPABLE OF CHANGING A STEERABLE WHEEL TO CONTROL HANDLE POSITION RATIO - A materials handling vehicle is provided comprising: a frame comprising an operator's compartment; wheels supported on the frame, at least one of the wheels being a steerable wheel; a steer-by-wire system associated with the steerable wheel to effect angular movement of the steerable wheel about a first axis; and a control apparatus. The steer-by-wire system comprises a control handle capable of being moved by an operator to generate a steer control signal, a selection switch capable of generating one of a first select signal and a second select signal, and a steer motor coupled to the steerable wheel to effect angular movement of the steerable wheel about the first axis. The control apparatus may be coupled to the control handle to receive the steer control signal, coupled to the selection switch to receive the one select signal, and coupled to the steer motor to generate a first drive signal to the steer motor to effect angular movement of the steerable wheel about the first axis. The control apparatus may convert the steer control signal to a corresponding desired angular position for the steerable wheel using one of first and second steerable-wheel-to-control-handle-position ratios, wherein the one ratio is selected based on the one select signal. | 08-06-2009 |
20090294200 | RING AND ROTOR COUPLING ASSEMBLY - Disclosed is a coupling assembly including a first coupling end operably connectable to a first shaft and a second coupling end operably connectable to a second shaft. A coupling body of a plastic material is located between and operably connected to the first coupling end and to the second coupling end. The coupling body includes at least one spring segment allowing relative motion between the first coupling end and the second coupling end along a coupling assembly axis. Also disclosed is a vehicle steering system utilizing the coupling assembly. | 12-03-2009 |
20100163333 | ROTARY POSITION SENSING APPARATUS - An angular position sensor ( | 07-01-2010 |
20110259663 | STEERING APPARATUS FOR VEHICLE - To prevent a generation of a large change of a steering reaction force at the time of starting and stopping steering so as to reduce a feeling of strangeness of a driver, while controlling driven wheels with high responsivity with respect to steering. A steering control unit | 10-27-2011 |
20120097470 | STEER-BY-WIRE TYPE STEERING DEVICE - A steer-by-wire steering system includes a steering motor, a steering power transmitting mechanism for transmitting a rotation of the steering motor to a steering axle, a toe angle adjusting motor and a toe angle adjusting power transmitting mechanism for adjusting the toe angle upon rotation of the toe angle adjusting motor. A switching mechanism is provided which operates in such a manner that in the event of failure of the steering motor, the rotation of the toe angle adjusting motor in place of the steering motor is transmitted to the steering power transmitting mechanism to enable a wheel turning, but in the event of failure of the toe angle adjusting motor, the wheel turning is carried out only by the steering motor. A hollow motor is employed for one or both of the steering motor and the toe angle adjusting motor. | 04-26-2012 |
20120205183 | STEER-BY-WIRE STEERING SYSTEM HAVING AN ELECTROMECHANICAL STEERING LOCK - The invention relates to a steering device for a road vehicle according to the steer-by-wire principle with a steering wheel that can be operated by a driver and with a steering gearbox that is not permanently mechanically coupled in a forcible manner, which is equipped with an electric motor drive for swivelling steered wheels, wherein the electric motor drive comprises an electric motor, a pinion ( | 08-16-2012 |
20130075185 | STEER-BY-WIRE STEERING DEVICE - A steer-by-wire steering device includes a steering wheel connected with a steering shaft, a steering angle sensor, a steering reactive force motor, and a steering control unit for controlling a steering shaft drive motor and the steering reactive force motor. Provided is a power transmitting mechanism for transmitting the power from the steering shaft drive motor to the steering shaft. A changeover unit for selectively connecting and disconnecting the power is disposed on the way thereof. The changeover unit includes a clutch mechanism comprised of an input member and an output member juxtaposed in an axial direction for movement in the axial direction and, also, rotatable relative to each other, a clutch groove provided in one of those members, and a clutch rolling element provided in the other of those members and biased in a radial direction by the clutch groove so that it can be selectively engaged and disengaged. | 03-28-2013 |
20130153326 | STEER-BY-WIRE STEERING SYSTEM - A wheel-turning device that constitutes a steer-by-wire steering system is made as compact as possible so as to be housed in a wheel house of a vehicle. The steer-by-wire steering system is provided including a wheel-turning device mechanically separated from a steering input device, the wheel-turning device being controlled based on an input signal from the steering input device, wherein the wheel-turning device includes a wheel-turning motor secured to a knuckle of a steered wheel via a gear case, a wheel-turning shaft secured to an upper arm, a worm wheel secured to the wheel-turning shaft, a worm gear meshing with the worm wheel, and the gear case housing the gears. | 06-20-2013 |
20130220725 | VEHICLE STEERING SYSTEM - A vehicle steering system includes a rotation restriction mechanism that restricts a rotation amount of a steering member within a predetermined angle. The rotation restriction mechanism includes at least one plate element that is interposed between a rotatable element, which is coaxially rotatable together with a rotary shaft of the steering member, and a non-rotatable element, and that is rotatable relative to the rotary shaft. Light projecting units are provided at one of the rotatable element and the non-rotatable element, and light receiving units are provided at the other one of the rotatable element and the non-rotatable element. The at least one plate element has light transmission portions that allows transmission of light that is emitted from the light projecting units and that enters the light receiving units when a rotation angle of the at least one plate element is a predetermined angle. | 08-29-2013 |
20130228391 | VEHICLE STEERING SYSTEM - A vehicle steering system in which a steering member and a steered wheel are not mechanical coupled to each other includes a rotation angle restriction mechanism that restricts a rotation angle of the steering member within a restricted angular range. In a normal mode, drive control on a steered system actuator is executed on the basis of a steering angle detected by a steering angle sensor. In a failure mode for a situation in which there is a malfunction in the steering angle sensor, drive control on the steered system actuator is executed on the basis of a steering direction detected by a steering direction detection sensor. The steering direction detection sensors detect the steering direction on the basis of at which one of a pair of terminal ends of the restricted angular range, the rotation angle restriction mechanism is restricting the rotation angle of the steering member. | 09-05-2013 |
20130292201 | VEHICLE STEERING SYSTEM AND MANUFACTURING METHOD FOR VEHICLE STEERING SYSTEM - Provided is a vehicle steering system that is able to restrict a travel amount of a steered shaft in a housing, that is small and that has an excellent strength. The vehicle steering system is a steer-by-wire vehicle steering system that converts rotative power of electric motors into a movement of a steered shaft in an axial direction via a ball screw mechanism. One of contact portions at respective ends of a screw shaft at an intermediate part of the steered shaft passes through a rotor based on a moving direction of the steered shaft so as to contact a corresponding one of the corresponding stoppers thereby restricting a travel amount of the steered shaft. The stoppers are made of a material different from that of the housing and having a high strength. | 11-07-2013 |
20140014433 | VEHICLE, AND METHOD FOR STEERING CONTROL OF SAME - Maneuverability and stability of a suspension unit for a vehicle are improved. A vehicle includes: a steer-by-wire system detecting a displacement of a steering wheel and displacing a steering rack steering steerable wheels on a basis of a detection result of the displacement and a suspension unit suspending the steerable wheels, the suspension unit including: wheel hub mechanisms, each wheel hub mechanism supporting a tire wheel on which a tire is attached, and a plurality of link members supporting the wheel hub mechanisms on the vehicle body; and a kingpin axis passing through an upper pivot point of the link members and lower pivot point of the link members being set to pass through a road surface contact area of the tire at a neutral position of the steering wheel. | 01-16-2014 |
20140190759 | AUTONOMOUS VEHICLE BRAKING AND STEERING SYSTEM - A steering system for a vehicle includes a front wheel supported for rotation about a first axis and a pivot axis transverse to the first axis and spaced inboard of a centerline of the front wheel. The front wheel is movable about the pivot axis to change direction of the vehicle. A brake coupled to the front wheel provides braking rotation of the front wheel and a controller controls operation of the brake to generate a desired braking force in a direction determined to adjust a vehicle direction. | 07-10-2014 |
20160152259 | USER INTERFACE ACTUATOR FOR A PILOT-BY-WIRE SYSTEM | 06-02-2016 |
180403000 | Hydraulic | 12 |
20080202841 | Electrohydraulic Steering System - Disclosed is an electrohydraulic steering system comprising a steering unit ( | 08-28-2008 |
20080277186 | Power steering apparatus - A power steering apparatus ( | 11-13-2008 |
20080296083 | STEERABLE SERIES TWO SPEED MOTOR CONFIGURATION - A hydraulic system includes first and second pumps, first and second motors, and three valves for selectively creating combined and basic hydraulic flow. The arrangement of valves permits combined flow to be provided to both motors in series to cause high speed operation of the motors, and permits combined flow to be provided to one motor and basic flow to the other motor. When applied to a vehicle, the arrangement provides a steerable high speed series arrangement of the vehicle's drive motors. | 12-04-2008 |
20090095561 | Hydraulic Steering System for a Vehicle - A steering system for an agricultural vehicle with a hydraulic steering motor incorporates an internal pump, a distribution valve, an input shaft which in use is coupled for rotation by the steering shaft of a vehicle steering wheel, and connectors for hydraulic lines leading to a high pressure source of oil, to an oil reservoir and to hydraulic actuators connected to the steerable wheels of the vehicle. The steering motor is located remotely from the steering shaft and is coupled for rotation with shaft by hydraulic rotary actuators mounted on the steering shaft and the input shaft of the steering motor and arranged in a closed circuit with one another. | 04-16-2009 |
20100147618 | STEERING CONTROL APPARATUS - A steering control apparatus is provided with first and a second steering mechanisms serving to assist a steering force exerted by a driver via a steering wheel. The first steering mechanism employs a first electric motor to apply a rotational torque to a pinion shaft, and the second steering mechanism uses a hydraulic oil pressure to apply a thrusting force to a rack bar. | 06-17-2010 |
20130284532 | SECONDARY STEERING SYSTEM WITH MARGIN PRESSURE DETECTION - A steering system can include a steering control valve, primary and secondary sources of pressurized fluid, and a controller. The primary and secondary sources of pressurized fluid can be fluidly connected to the steering control valve. The primary source of pressurized fluid can be configured to sense a load pressure requirement from the steering control valve. The controller can be communicably coupled to the primary and secondary sources of pressurized fluid. The controller can monitor a margin pressure of the primary source of pressurized fluid. The controller can determine an operational status of the primary source of pressurized fluid based on the monitored margin pressure. | 10-31-2013 |
20140083792 | STEERING DEVICE OF WHEEL LOADER - A steering device for a wheel loader includes a rotatable handle, a tiltable lever, a steering cylinder, a steering valve, a pump, a handle control valve, a lever control valve, and a handle prioritization valve. The steering valve controls a supply direction of operating fluid to the steering cylinder with pilot hydraulic pressure. The pump supplies operating fluid to the steering cylinder via the steering valve. The handle and lever control valves supply pilot hydraulic pressure to control the supply direction to the steering valve according to handle rotation and lever tilt, respectively. The handle prioritization valve shuts off the pilot hydraulic pressure supplied from the lever control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced due to operating fluid flowing through the handle control valve when the handle is operated. | 03-27-2014 |
20140151145 | TWO-PHASE MOTOR AND HYDRAULIC POWER STEERING SYSTEM USING THE TWO-PHASE MOTOR - A two-phase motor with high space utilization efficiency is provided for driving a hydraulic control valve. A valve drive motor includes a rotor and a stator surrounding the rotor. The rotor has six magnetic poles. The stator includes six stator windings. The U-phase first stator winding and the V-phase first stator winding constitute a pair of two-phase stator windings. The U-phase second stator winding and the V-phase second stator winding constitute a pair of two-phase stator windings. The U-phase third stator winding and the V-phase third stator winding constitute a pair of two-phase stator windings. The two stator windings of each pair are disposed at an angular interval of 180 degrees in terms of an electrical angle. | 06-05-2014 |
20150083516 | STEERING METHOD AND STEERING SYSTEM FOR AN INDUSTRIAL TRUCK - A steering method for an industrial truck includes manually steering at least one steerable wheel, detecting an angular position of the at least one steerable wheel, and motor-steering at least one additional steerable wheel as a function of the detected angular position. For a 90° change of a travel direction of the industrial truck, the method comprises steering the at least one steerable wheel and the at least one additional wheel by 90°, manually steering the at least one additional wheel, and motor-steering the at least one steerable wheel. | 03-26-2015 |
20160037706 | REAR STEERING CONTROL FOR A VEHICLE - A steering system and method are described for a vehicle having steerable front and rear wheels. A rear hydraulic steering device may be coupled to one or more of the rear wheels. A rear valve assembly may hydraulically control the rear hydraulic steering device to steer the rear wheels based upon a rear steering command. In a rear steering assist mode, the rear steering command may be determined based upon a manual steering input received at a steering input device. In an automated steering mode, the rear steering command may be determined based upon a target path of the agricultural vehicle that is determined independently of the manual steering input. | 02-11-2016 |
20160068182 | ELECTROHYDRAULIC STEER-BY-WIRE STEERING SYSTEM - An electrohydraulic steer-by-wire steering system has an operator interface for specifying a turning angle, which is associated with a sensor for the acquisition of a position or movement of the operator interface. An electronic control device is connected to a first electrohydraulic circuit and to a second electrohydraulic circuit and set up in order to actuate the two electrohydraulic circuits as a function of a signal from the sensor. The system further includes a steering actuator for adjusting the turning angle of a steerable wheel. The steering actuator has two chambers each of which is connected simultaneously to the two electrohydraulic circuits. | 03-10-2016 |
20160200347 | STEERING STOP | 07-14-2016 |