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Hydraulic-power Steering System With Magnetic Torque Overlay

一种转向系统、动力转向的技术，应用在动力转向机构、转向机构、车辆部件等方向，能够解决不能实现高级转向功能等问题

Active Publication Date: 2014-09-24
STEERING SOLUTIONS IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cannot implement advanced steering functions such as active centering, traction compensation, lane keeping and park assist

Method used

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  • Hydraulic-power Steering System With Magnetic Torque Overlay
  • Hydraulic-power Steering System With Magnetic Torque Overlay
  • Hydraulic-power Steering System With Magnetic Torque Overlay

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] Magnetic steering is a "variable force" system that uses a magnetic actuator to vary the torsional stiffness of the power steering valve, thereby varying actuation, force or torque. The control module determines the magnitude and direction of current applied to the excitation coil of the magnetic actuator to vary the torque as a function of vehicle speed.

[0018] According to an exemplary embodiment, Magnetic Steering with Torque Overlay or Magnetic Torque Overlay (MTO) is one such system developed to enable advanced steering features or functions such as active centering, traction compensation, lane keeping, and parking car assist. MTO regulates magnetic steering to provide the ability to generate assist for advanced steering functions in the absence of torque from the vehicle driver.

[0019] exist figure 1 Showing the scope of the system, it is a graph showing the "pressure versus force (torque)" associated with the magnetic actuator of the MTO. The magnetic act...

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PUM

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Abstract

A hydraulic-power steering system is provided. A power-steering valve controls and varies a level of steering assist. A magnetic actuator varies torsional stiffness of the valve to change torque and produce a sufficient amount of the torque to generate full assist. A first valve is operatively connected to a steering pump and allows the full assist at a relatively low steering torque and through which flow from the steering pump is directed. A second valve is operatively connected to the steering pump. Current is applied to a solenoid valve that allows an increasing amount of the flow to be directed through the second valve in response to an input signal of increasing vehicle speed above a threshold value and closes in response to a signal identifying any of a plurality of advanced steering functions.

Description

[0001] Cross References to Related Applications [0002] This application is based upon and claims the benefit of the filing date of US Patent Application 61 / 764,023, entitled "Magnasteer Torque Overlay with Hydraulic Park Assist," filed February 13, 2013, which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a power steering system of a vehicle, and in particular to a magnetic actuator used by such a system for assisting parking of the vehicle. Background technique [0004] Power steering systems in motor vehicles are designed to provide appropriate hydraulic or electric steering assist to allow the driver of the vehicle to complete turns of the vehicle. The driver applies steering input through a manual steering wheel of the vehicle that is rotatably connected to a first shaft, which is in turn rotatably coupled to a second shaft, which in turn is connected to a steering mechanism. The first and second shafts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/00
CPCB62D5/0835
Inventor J·E·伯兴
Owner STEERING SOLUTIONS IP HLDG