Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting internal friction in a steering system

一种电动转向系统、内摩擦的技术，应用在转向机构、动力转向机构、车辆转向/颠簸性能等方向，能够解决计算和储存能力有限等问题，达到易于应用和适应、避免错误警告的效果

Active Publication Date: 2010-12-01
FORD GLOBAL TECH LLC
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is very disadvantageous because the central control unit has limited computing and storage capacity for solving friction detection problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting internal friction in a steering system
  • Method for detecting internal friction in a steering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The method of the present invention starts at starting block 1 . In box 2, the limit value for the variation of the steering column torque (relative to the variation for steady straight driving at 0 Nm manual torque) is defined. The limit value depends on the configuration of the vehicle. The absolute limit value is higher for a vehicle with a sporty tune than for a vehicle with a comfort tune. Of course this is just an example. In block 2 it is also possible to define limit values ​​for the change in position of the steering rack. On the steering wheel, this limit value can have, for example, a rotation angle with an absolute value of 1°. This means that the limit value is exceeded if the steering rack moves more than 1° from its previous position due to the steering column torque. Limit values ​​are defined and maintained once. Of course, the above-mentioned absolute limit values ​​are only exemplary and should not limit the present invention.

[0024] In box 3 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for detecting internal friction in an electric steering system of a motor vehicle having a control unit. The method comprises: defining a limiting value for a change in a steering column torque; defining a limiting value for a change in a steering rack position; measuring an actual steering column torque; measuring an actual change in a steering rack position; and generating a fault message if the actual steering column torque exceeds the limiting value for the change in a steering column torque and if an actual change in steering rack position is less than or equal to the limiting value for a change in a steering rack position.

Description

technical field [0001] The invention relates to a method for detecting internal friction in an electric steering system of a motor vehicle having a control unit. Background technique [0002] Electric power steering is also known as Electric Power Assisted Steering (EPAS). Over time, EPAS systems may have increased friction values ​​(aka internal friction), especially in the steering rack area, pinion and steering column. Internal friction can arise, for example, as a result of penetrating water and / or dirt, but also as a result of mechanical damage to the active elements. Too high an absolute friction value puts the safety performance of the steering system at risk. Therefore, if such a reduction in initial system performance is detected, the driver of the vehicle must be warned early in order to initiate repair and / or maintenance. [0003] EPAS systems typically have sensors, however, which are not suitable for directly detecting the friction described above. For this ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02G01L5/00
CPCB62D5/0481G01M17/06
Inventor 克劳斯·舒斯特瑞奇
Owner FORD GLOBAL TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com