Method for reducing steering torque in a steering system of a vehicle

a technology of steering system and steering system, which is applied in the direction of steering initiation, instrumentation, vessel construction, etc., can solve the problems that the potential performance of additional functions or torque impositions cannot always demand torque useful, and the calculation of the driver's torque is complex, so as to reduce the summed imposed torque

Inactive Publication Date: 2014-05-01
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]Each torque that can be imposed can be reduced individually with the reduction factor or combined torques that can be imposed can be reduced together using the reduction factor. The reduction factor is used to reduce the summed imposed torques. In order to achieve this, each torque that can be i...

Problems solved by technology

Normally, the steering torque superimposed on the driver's torque by such assistance systems is limited in amplitude and dynamics.
This means that the potential performance of additional functions or torque impositions cannot always demand torque useful or necessary for the respective situation.
This means that all limiting additional functions for providing the additional torque in the control loop have to calculate/determine the corresponding driver's torque.
The calculation of the driver's torque is complex on the one hand and can frequently only be carried out roughly because of th...

Method used

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  • Method for reducing steering torque in a steering system of a vehicle
  • Method for reducing steering torque in a steering system of a vehicle
  • Method for reducing steering torque in a steering system of a vehicle

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Embodiment Construction

[0029]The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

[0030]FIG. 1 shows a steering system 1 of a vehicle and a controller 2 for the steering system 1 schematically. For clarity, only components that are important for the explanation of the invention are illustrated here, other components such as e.g. steering wheel, steering column, etc. being therefore not shown.

[0031]One or a plurality of sensors 3, such as e.g. a sensor for detecting a driver's torque applied by a driver of the vehicle, is / are connected to a monitoring unit or a “correlation monitor”4. The monitoring unit 4 monitors or plausibility checks the steering movements with respect to the driver's intention using the torque that is applied by the driver. Monitoring of the driver's torque applied by the driver of the vehicle takes place.

[0032]The steering system 1 or the controller 2 comprises a plurality of ...

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Abstract

A method for reducing the steering torque in a steering system of a vehicle. A method including the steps of monitoring a driver's torque as applied by a driver of the vehicle; providing a plurality of torques that can be imposed on the steering system; and reducing the torques that can be imposed on the steering system by a central reduction factor if monitoring of the steering system reveals a violation of a safety criterion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Not Applicable.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to vehicle steering systems and, more specifically, to a method for controlling or reducing steering torque in a steering system of a vehicle.[0004]2. Description of Related Art[0005]Modern steering systems include assistance systems that enable the imposition of steering torque in order to provide driver comfort. Moreover, such assistance systems operate to reduce disturbing torque influences caused by the vehicle or the surface of the highway.[0006]The steering wheel is the haptic interface to the driver and any imposed torque must be configured whereby it can be controlled by the driver. For example, in the event of a fault, such as an unintentional imposed torque, the driver's reaction remains an important non-negligible part of the overall system.[0007]Consideration of the impact of unfavorable torque impositions on the overall steeri...

Claims

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Application Information

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IPC IPC(8): B62D6/08
CPCB62D6/08B62D6/008
Inventor DORNHEGE, JENSENGELS, FRANK PETERWEGNER, GOETZ-PHILIPP
Owner FORD GLOBAL TECH LLC
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