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7631722 |
Power steering system
In a power steering system, the steering state of wheels is detected based on the steering speed to judge as to whether the steering state is in turning of the steering wheel or holding of steering...
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7624836 |
Steering system having multiple strategies and variable deadzone
A steering system for a machine having at least one steerable traction device is disclosed. The steering system may have a steering actuator operatively connected to the at least one steerable...
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7584816 |
Power steering apparatus
There is provided a power steering system including an electric motor for generating a steering force in response to an command value, and a controller for generating the command value to the...
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7571039 |
Vehicle yaw/roll stability control with semi-active suspension
A rollover avoidance system for changing the damping characteristics of suspension dampers at each wheel of a vehicle so as to mitigate the potential for vehicle rollover. The system includes a...
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7434653 |
On-demand electro-hydraulic steering system
A hydraulic steering system for a work machine may include a first steering actuator having a first and a second chamber. In addition, the steering system may include a second steering actuator...
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7389848 |
Hydraulic power steering assistant
The invention generally relates to an improvement of conventional Hydraulically Power Assisted Steering system (HPAS-system) arranged to supply a steering assist force to the steering assembly of a...
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7364004 |
Apparatus for use in turning steerable vehicle wheels
An apparatus ( 10 ) for use in turning steerable vehicle wheels ( 14, 16 ) includes a hydraulic power steering motor ( 12 ). A pump ( 26 ) is operable to supply hydraulic fluid to the power...
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7311033 |
Retroactive device
A retroactive device as part of a hydraulic servo-steering system that also includes a hydraulic servo-valve device, the retroactive device comprising an arrangement for hydraulically producing a...
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7251933 |
Flow rate control device for power steering
Provided are a hydraulic pump 7 , an electromagnetic flow rate control valve 2 that controls the flow rate of hydraulic oil supplied from the hydraulic pump 7 to a power steering device PS,...
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7124855 |
Flow controlling apparatus for power steering
A flow controlling apparatus for a power steering system includes a variable throttle mechanism installed in the pump to change the flow rate of discharged oil from the pump to a hydraulic device;...
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7055643 |
Apparatus for controlling a power-assisted steering gear in response to vehicle speed
An apparatus ( 10 ) for helping to turn steerable wheels ( 12 ) of a vehicle comprises a hydraulic power-assisted steering gear ( 16 ). An electric motor ( 92 ) actuates the steering gear ( 16 ). A...
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7040449 |
Power steering gearbox mechanism for a vehicle including a hydraulic fluid flow control device dependant from a speed at which the vehicle is running
Steering gearbox mechanism for automotive vehicles that allows feeding the hydraulic fluid control mechanism of said steering mechanism with pressurized hydraulic fluid, depending on the vehicle's...
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6981568 |
Vehicle speed response type power steering system
A vehicle speed response type power steering system, wherein, when a vehicle is moving at a relatively slow speed, a relatively large auxiliary power is generated to enable a driver to easily...
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6856870 |
Power steering system
A power steering system capable of giving a driver no discomfort even when an incoming current instruction value sharply decreases. The power steering system comprises a controller C for...
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6708795 |
Steering damper system
To generate a damping force in a steering damper only upon an unintentionally caused handle action when it is truly necessary to restrain the turning of the handle, according to whether the cause...
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6686835 |
Rear wheel steering angle control apparatus
A rear wheel steering angle control apparatus is provided with a rear wheel steering angle determining unit and a rear wheel steering mechanism so as to determine a steering angle ratio based upon...
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6668967 |
Method of steering a vehicle
The invention concerns a method of steering a vehicle, particularly an articulated vehicle, in which a valve element of a main valve is moved so that it releases or closes connections between a...
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6619420 |
Rack and pinion steering gear with hydraulic yoke assembly
An apparatus ( 10 ) for turning steerable wheels of a vehicle comprises a housing ( 12 ). A rack bar ( 54 ) is movable longitudinally relative to the housing ( 12 ) for turning the steerable...
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6390228 |
Hydraulic power steering apparatus for vehicle
A hydraulic power steering apparatus for a vehicle is provided with a main control valve in which a valve opening degree is controlled on the basis of a relative movement between an input shaft...
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6366842 |
Power steering apparatus
A motor is stopped when a steering angular speed is not greater than a stop threshold VS and a motor electric current value Im is kept within a motor stop range ΔI for a predetermined time period....
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5794736 |
Fluid control system for a vehicle power assisted steering mechanism
A fluid control system (10) for a vehicle power steering mechanism having a manually driven steering member and a fluid driven driving member (16) operatively connected to steering means of the...
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5771989 |
Power steering system
An apparatus for use in a vehicle to control a flow of fluid to a power steering motor includes inner and outer valve members (40 and 42) which are disposed in a housing (44) and are rotatable...
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5769121 |
Rotary slide valve for power-assisted steering in motor vehicles
A rotary slide valve (1) for the power steering of motor vehicles contains a rotary distributor (4) in a valve bore (5) of a valve housing (2), which distributor is connected with a valve inlet...
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5740879 |
Power steering apparatus
A vehicle speed responsive power steering apparatus enables a pressure which acts upon a power cylinder to be variably controlled in accordance with a vehicle speed or the like, thus allowing an...
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5711394 |
Power steering apparatus with motor driven pump
A electric motor, which drives a fluid pressure pump used to derive a steering assist force, is controlled in a required manner using a simplified arrangement. Specifically, a pump 11 which feeds a...
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5687810 |
Power assistance steering system for use in a vehicle
A power assistance steering system for use in a vehicle comprises a restricting mechanism including a cylindrical reaction piston having a reaction surface on which said reaction pressure is...
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5634527 |
Speed responsive power steering
A main servo valve 4 is switched in response to a relative angular displacement between an input and an output shaft for supplying an operating oil discharged from a pump to or displacing such...
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5627754 |
Method for controlling a front and rear wheel steering vehicle
To the end of ensuring a brisk maneuverability of a front and rear wheel steering vehicle without causing any unstable behavior of the vehicle, the rear wheels are steered in an opposite phase...
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5582264 |
Power assisted steering system, in particular, for motor vehicles
A power assisted steering system, in particular, for motor vehicles, contains a servomotor (2), a servopump (3), a tank (4), a control valve (1) with a controllable feedback device (5), and a...
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5564516 |
Clutched electric motor steering system
In the hydraulically assisted steering system disclosed herein, a hydraulic pump for powering a steering servo is in turn driven either from the vehicle's engine, through an electrically controlled...
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5517899 |
Hydraulic servosystem with externally controllable setting assembly
A fluidic, in particular a hydraulic, servosystem has an input which can be actuated at will and an output which is elastically drivingly connected thereto, with a relative movement made possible...
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5517096 |
Power steering system
A power steering system includes a housing and a first member supported by the housing for movement relative to the housing. A second member is supported by the housing for movement relative to the...
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5513821 |
Aircraft steering system and method for large aircraft having main landing gear steering during low taxi speed while nose gear is castored
A steering method and system for large aircraft wherein during low speed taxi the main landing gear wheels are steered and the nose gear is free to castor. During high speed taxi such as during...
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5494127 |
Power steering system
A power steering control valve including relatively rotatable inner and outer valve members. A power steering resistance control system resists relative rotation between the inner and outer valve...
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5489006 |
System and apparatus for limiting vehicle turning radius
A vehicle steering control system and apparatus for controlling steering radius to prevent vehicle and surface damage and to provide improved low speed vehicle maneuverability. The steering control...
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5485376 |
Steering wheel posture control system
A system for automatically swinging a steering wheel to a withdrawn position to make it easy for the driver to get on and off a vehicle is made more reliable by employing a park position sensor...
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5367235 |
Power steering device having electrically driven pump
A power steering device having a pump to be driven by an electric motor and adapted to assist in steering a vehicle with hydraulic pressure produced by the pump. The device includes a controller...
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5339917 |
Power steering device
A power steering device supplies hydraulic oil to the left and right chambers (6,7) of a servo cylinder (3) by means of a pump (10) via a rotary slide valve (9), whereby a reaction piston (18) that...
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5297647 |
Variable assist power steering gear with hydraulic reaction controls
The invention comprises a steering gear for an automotive vehicle having a rotary valve mechanism that controls pressure distribution to a fluid motor that establishes a power assist during...
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5207780 |
Hydraulic valve device for automotive power steering gear
A power steering device for a motor vehicle whereby when the vehicle is under a high or middle speed movement, the slide torque is controlled to a relatively low constant level irrespective of the...
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5190119 |
Hydraulic power steering device responsive to speed of vehicle
A hydraulic power steering device responsive to the speed of a vehicle and comprising a housing, an output shaft disposed in the housing, an input shaft disposed in the housing and coaxial with the...
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5184693 |
Vehicle hydraulic power steering system
A power steering motor is operatively connectable with steerable vehicle wheels for steering the vehicle wheels. An actuatable power steering valve has a neutral position in which fluid flows...
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5168949 |
Steering force control system for power steering
A subpump has its discharge flow rate increased in response to an increase in a vehicle speed. A variable throttle is disposed in a discharge passage from the subpump, and an oil pressure taken...
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5121807 |
Power assisted vehicle steering system
A power assisted vehicle steering system of the speed responsive kind has a ram 6 fluid flow to chambers 4 and 5 of which from a pump 9 is directed by an open center steering valve 1. Communication...
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5070958 |
Variable effort steering gear
A variable effort power steering gear including detent elements in radial sockets in a pinion head, detent grooves in a stem of a stub shaft, an annular low speed reaction piston on the pinion head...
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5069301 |
Vehicle power assisted steering system
A vehicle power assisted steering system comprises a hydraulic pump 24 having a constant volume output communicating with an open center power assistance valve 40 which is adjustable from a neutral...
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5058697 |
Modulator and power-assisted steering circuit containing such a modulator
The modulator is intended for diverting a specific quantity of fluid under high pressure from the supply circuit of a hydraulic motor for a power-steering of motor vehicles, comprising a body (48),...
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5048628 |
Power assisted steering system
An hydraulic fluid actuated power assisted steering system has an open center valve 4 adjustable in response to a steering input to control fluid flow to a power assistance ram 6. A by-pass valve 8...
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5046573 |
Automotive power steering system
An automotive power steering system including a power steering gear with detent reaction and a control system for the detent reaction. The detent reaction includes an annular collar in a detent...
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5046574 |
Automotive power steering gear
An automotive power steering gear includes a stub shaft, a pinion head, a torsion bar between the stub shaft and pinion head, and a detent reaction arrangement for varying the threshold manual...
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