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8162095 |
Vehicle steering system of the by-wire design type
A vehicle by-wire steering system includes a hydraulic default level. A hydraulic feed unit and a hydraulic actuating unit can be connected together by two hydraulic lines such that when an...
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8066091 |
Steering system
A steering system, comprising: an input cylinder having a first hydraulic chamber and a second hydraulic chamber; a transmission mechanism, wherein a transmission efficiency for converting and...
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7980353 |
Steering system for controlling the turning angle of the steering wheels of a vehicle
A steering system is provided for controlling the turning angle of the steering wheels of a vehicle. The steering system includes two electro-hydraulic circuits each including an actuator, both...
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7942230 |
Hydraulic power steering system
A hydraulic power steering system for a vehicle, e.g., an electrohydraulic power steering system for a motor vehicle, includes a servo valve, the relative movement of whose control parts actuates a...
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7694776 |
Hydraulic steering system with protection against uncontrolled steering movements
A hydraulic steering system (1) including a hydraulic steering unit (2) and an auxiliary device (3). Said The steering unit (2) feeds a hydraulic medium to a steering cylinder (5) according to the...
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7530422 |
Force and position control for active front steering
A steering system with reduced coupling between a position overlay unit and a torque overlay unit may include a remote valve assembly for controlling a hydraulic assist force or an electric motor...
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7510044 |
Power steering apparatus
A power steering apparatus (10) includes a first pump (24) which is continuously driven to supply fluid under pressure to a power steering motor assembly (18). A second pump (32) is driven by the...
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7306070 |
Variable gear ratio hydraulic power steering device
A variable gear ratio hydraulic power steering device 1 is provided with a variable ratio transmission mechanism 7 for varying the rotation transmission ratio between the rotational angle of a...
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7143862 |
Power steering device for a vehicle
In a power steering device comprising a power steering pump, and to a method for operating a power steering device for a vehicle comprising a hydraulic circuit provided with a rotary slide valve, a...
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6948584 |
Steering device
A steering system, e.g., a hydraulic rack and pinion steering system for motor vehicles, includes a steering handle for prescribing a steering intention, a pressure medium source and a control...
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6904998 |
Device and method to ensure the steerability of an industrial truck
The invention relates to a device and a method to ensure the steerability of an industrial truck that has a hydraulic steering system. The invention includes at least one gas generation cartridge...
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6612393 |
Steering system for motor vehicles
A steering system functions in accordance with the “steer by wire” concept and has a normal operating system without positive coupling between the steering handle and the steered vehicle whe...
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6595314 |
Hydraulic steering system, for an articulated vehicle with wheel steering
A hydraulic steering system (1) for a vehicle with two steering motor arrangements, particularly an articulated vehicle with wheel steering, with a hydraulic steering unit (2) having a measuring...
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6581717 |
Hydraulic steering arrangement
A hydraulic steering arrangement with a steering handwheel which is connected with a hydraulic steering unit, and with a steering motor connected with a pump via a steering valve. In a steering...
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6548969 |
Redundant steer-by-wire system
An automotive steer-by-wire system is disclosed that includes a first network. The first network connects a first set of controllers for controlling a first set of motors. The steer-by-wire system...
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6513619 |
Electrically-driven power steering system
An abnormality detection circuit for detecting abnormality of a CPU includes a command value check circuit for checking whether a current command value calculated by the CPU is normal or abnormal...
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6502661 |
Steering system for a vehicle
The invention relates to a vehicle steering system comprising a steering linkage, a control hydraulic motor and a control hydraulic circuit, a steering wheel connected to the control hydraulic...
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6484839 |
Steer-by-wire rotary actuator
A steer-by-wire steering system for steering a set of road wheels is disclosed. The system comprises a controller and at least one actuator assembly connected to the controller and to the at least...
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6474437 |
Power-assisted steering with hydraulic power assistance
In a power steering system having hydraulic power support for motor vehicles, a steering gear shaft having a steering wheel is connected to an input element of a steering gear. An output element of...
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6386312 |
Hydrostatic steering arrangement with dual control systems
A hydrostatic steering arrangement with two control systems, each of which has a control unit with an inner and an outer rotary slide and a steering motor, one steering handwheel being common for...
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6374940 |
Steering device for self-propelled working machines
A steering device for self-propelled working machines. Steering cylinders are associated with each pair of wheels and a fluid which is suppliable from a valve unit to the cylinders. At least one...
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6367575 |
Motor vehicle steering system
A steering system for motor vehicles, in which a steering member or steering wheel and the steered vehicle wheels are hydraulically positively coupled for the steering actuation of the wheels. An...
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6354393 |
Hydraulic power steering system for motor vehicles
A hydraulic power steering system for non-tracked vehicles, particularly motor vehicles, has a steering adjustment of the steered vehicle wheels which takes place of a hydraulic actuating assembly...
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6283243 |
Method for operating a vehicle steering system
A way is provided to simulate the steering handle manual torques which correspond to a steering stop of the steered vehicle wheels for a vehicle steering system which can be operated in a normal...
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6244371 |
Steering system for non-track-bound motor vehicles
A steering system of a non-track-bound motor vehicle having steered vehicle wheels which are operatively connected to a steering handle in normal operation only via an electronic regulating...
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6213246 |
Electrically actuated vehicle steering system
In a steering system for a motor vehicle, the steered vehicle wheels, during normal operation, are coupled with a steering handle only through an electronic regulating system that constantly checks...
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6173728 |
Switching valve for a hydraulic power steering system
A switching valve (50) for a hydraulic power steering system (10) includes a longitudinally movable valve spool (80). A spring (86) biases the spool (80) to a neutral position. The switching valve...
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6102150 |
Vehicle steering mechanism
A vehicle steering system is provided with a manually operable steering member and a hydraulically operated steering actuator unit operable to control the steering movements of at least one vehicle...
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6047788 |
Hydraulic power steering system with dual, double-acting piston-cylinder units
In a hydraulically operated steering for a motor vehicle comprising a control motor with first and second double acting piston and cylinder units arranged in axial alignment and a single piston rod...
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5850888 |
Variable-ratio hydraulic steering system
The invention changes over to another steering ratio automatically and very safely on the transition from servo to emergency operation. In the steering system, only a few of the lines (13) link the...
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5826676 |
Failsafe hydraulic steering system for use in an industrial vehicle
The inventive steering system is of the type having an engine, a fluid reservoir, a steering valve unit, an actuator control valve unit, a main fluid pump driven by the engine for pumping the fluid...
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5507360 |
Hydraulic system for dynamic braking and secondary steering system supply
In certain machines, such as construction equipment, it is desirable to provide a supplemental fluid supply for hydraulic steering systems to maintain sufficient fluid flow should a failure occur...
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5465804 |
Combination of a power steering pump and air conditioning compressor in an automotive vehicle
A power steering pump and air conditioning compressor are axially aligned. Power from the power steering pump is provided to the air conditioning compressor through a coupler. The coupler has two...
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5251716 |
Two-loop steering system for motor vehicles
The steering system of a motor vehicle includes a steering motor having the application of pressurized fluid applied thereto by a main loop and in the event of a fault in the main loop by an...
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5249639 |
Steering control arrangement
Vehicles having front and rear pairs of steerable wheels are sometimes provided with large springs for moving one pair of the wheels to a straight-ahead position during emergency steering. Large...
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5050696 |
Secondary hydraulic steering system
A secondary hydraulic steering system being automatically triggered and manually actuated. The steering system is provided with a dual displacement fluid meter having a fluid pressure sensing valve...
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5022481 |
Emergency power steering backup apparatus and method
An emergency power steering backup apparatus is adapted for supplying a vehicle's power steering unit with an emergency supply of power steering fluid only when the vehicle's primary power steering...
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5022482 |
Hydraulic steering system for electrically driven motor vehicles
A hydraulic control system for, e.g., electrically driven vehicles, comprising a hydraulic, double-acting steering piston-cylinder device which co-acts with a control unit which is actuable by...
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4955445 |
Hydrostatic auxiliary power steering mechanism for motor vehicles
A hydrostatic auxiliary power steering mechanism for motor vehicles is described, in which the steering cylinder power is controlled by a servo mechanism for which a control loop is provided for...
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4942935 |
Auxiliary power steering system
In general, an auxiliary system for steering a vehicle includes a power steering unit coupled to the vehicle steering wheel so that the steering unit is thereby made capable of being manually...
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4798256 |
Hydrostatic auxiliary steering device
A pair of flow restricting orifices regulate flow from a main engine driven pump through a control valve and steering wheel metering device to a servo motor in a vehicle steering system. Under...
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4762195 |
Hydraulic steering system
An hydraulic steering system for a ground-engaging, self-powered vehicle, the system including an engine driven primary pump for pumping hydraulic fluid to the steering system when the vehicle...
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4736811 |
Steering control system
The steering system of some lightweight vehicles are electronically controlled and have a manually operated mechanical control as a backup. Such manual backup control would not be adequate for...
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4651841 |
Power assistance steering system for a vehicle
A power assistance steering system for a vehicle, particularly a heavy vehicle, having a first power assistance subsystem known per se and a second power assistance subsystem including a fluid pump...
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4618017 |
Hydraulic auxiliary power steering for motor vehicles
A booster steering system has two pressure pumps for the booster cylinder, one of which is driven by the vehicle, with the wheels when the vehicle is rolling, and the other pump is driven by the...
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4574904 |
Auxilliary steering system
An auxilliary hydraulic steering system for use on mobile vehicles having an engine-driven pump supplying hydraulic fluid under pressure to a steering control unit and an accumulator. The...
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4553389 |
Hydrostatic auxiliary steering apparatus
In a hydrostatic auxiliary power steering apparatus, a short-circuit passage of a control valve establishes a restricted flow path from a pump pressure line to a reservoir return line in the...
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4410057 |
Emergency hydraulic system
An emergency hydraulic system for a vehicle having a hydraulic steering mechanism normally supplied by an engine driven pump. An electric motor driven pump supplies the steering mechanism under...
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4396083 |
Disconnectable hydraulic steering assistor
A hydraulic steering assistor, which can be switched off, for a vehicle with a hydraulic pump, an electric motor and a relay, which vehicle is driven by an electromotor, runs on wheels and is...
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4368794 |
Auxiliary power steering for motor vehicles
A power steering gear assembly having a single control valve suitable for use in a single circuit type of power steering system, may be simply converted to use in a two-circuit type of power...
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