Patent
Parallel flow electronically variable orifice for variable assist power steering system
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TLDR
In this paper, a power steering pump includes a housing defining an opening containing a sliding vane rotor, a cam ring and pressure plates located at each axial side of the rotor and having inlet ports connected to a source of low pressure fluid and outlet ports connected with the power steering system.Abstract:
A power steering pump includes a housing defining an opening containing a sliding vane rotor, a cam ring and pressure plates located at each axial side of the rotor and having inlet ports connected to a source of low pressure fluid and outlet ports connected to a power steering system. The pressure control valve opens and closes an orifice of constant size connecting the pump outlet to a power steering gear. An electronically variable orifice arranged in parallel with the fixed orifice connects the pump and outlet to the power steering gear. When the control valve opens sufficiently, the pump outlet is connected to the inlet through a diffuser arranged to draw low pressure fluid into a high velocity stream of bypass fluid. Kinetic energy of the stream is used to increase static pressure in the fluid supplied to the pump inlet.read more
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References
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Patent
Vehicular power steering system
TL;DR: In this article, the hydraulic fluid supply to a hydraulic power actuator is controlled in accordance with the vehicle speed and the angular velocity of the steering wheel (4) in a vehicular power steering system.
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Hydraulic reaction force apparatus for power steering system
TL;DR: In this article, a hydraulic reaction force apparatus for a power steering system includes input and output shafts, guide holes, balls, reaction force reception portion, a reaction force chamber, and reaction force piston.
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Variable assist power steering system
TL;DR: In this paper, a power steering gear mechanism for an automotive vehicle having a pressure operated vehicle steering mechanism controlled by a rotary valve with primary and secondary valve portions is presented, where the primary valve portion develops a fast-rising steering pressure characteristic for incremental changes in steering torque at low driving speeds and a flatter or more gradual steering pressure rise characteristic for increasing steering torque in high driving speeds.
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Dual rotary valve for variable assist power steering gear for automotive vehicles
TL;DR: In this article, a power steering gear mechanism for an automotive vehicle having a pressure operated vehicle steering mechanism controlled by a rotary valve with primary and secondary valve portions is presented, where the primary valve portion develops a fast-rising steering pressure characteristic for incremental changes in steering torque at low driving speeds and a flatter or more gradual steering pressure rise characteristic for increasing steering torque in high driving speeds.
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Regulated device for controlling pressure in a hydraulic installation, particularly for the assisted steering of a vehicle
TL;DR: In a branch hydraulic line, a valve seat can be closed selectively by a valve member, as a function of electrical control signals, by an electromagnetic control component comprising typically a main coil (42) and a secondary coil (45) mounted on a non-magnetic support (39) which is firmly fixed to the valve member as mentioned in this paper.