Estimation of the ageing of power-steering

A technology of power steering and aging value, which is applied in the mechanism field of equipped vehicles, can solve the problems of insufficient compensation, difficulty in objectively estimating the aging of steering mechanism, etc., and achieve a simple effect

Active Publication Date: 2016-11-23
JTEKT EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conversely, if the compensation laws were set by values ​​derived from measurements taken from the late running performance of the steering, the compensation would appear insufficient on new ve

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  • Estimation of the ageing of power-steering

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Embodiment Construction

[0025] The invention relates to a method for estimating the aging of a steering gear 1 , in particular a method for estimating the aging of a power steering gear 1 .

[0026] Such as figure 1 As shown, the steering mechanism 1 advantageously comprises at least one actuating member 2, 3, such as a steering wheel 3 and / or, preferably, an auxiliary motor 2, driven by at least one kinematic chain 4, 5, 6 , 7, 8, 11 are coupled to at least one steering member, such as steering wheels 9,10.

[0027] "Actuating member" 2, 3, in this context means a member designed to actively operate the steering, i.e. it allows a definite (manual and / or electric) operating force to be applied intentionally to the steering mechanism 1 in order to control The steering angle of the steering mechanism, more particularly controls the yaw angle position of one or more steering members 9, 10, such as steering wheels, which are remote from the actuating members 2, 3 and in contact with the The actuating m...

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Abstract

The present invention relates to a method for estimating the ageing of a steering mechanism (1) during which the ageing of the steering mechanism is assessed by calculating a so-called ageing value in accordance with an ageing function (old, old2, ene) which corresponds to the integral, over time, of an expression which is weighted by a stress indicator (Tm(u), Ts(u)), the value of which, at each moment (u) in question, is representative of the strength of a biasing force (Tm, Ts), such as the control force exerted by the power-steering motor (2), that is applied to said steering mechanism (1) at said moment in question.

Description

technical field [0001] The invention relates to the general technical field of mechanisms equipping vehicles, in particular equipping motor vehicles. [0002] More particularly, the present invention relates to power steering systems, and particularly electric power steering systems. Background technique [0003] In the mechanical field in general, and in the automotive field in particular, it is known that systems age, degrade and are disposed of by being scrapped. [0004] In a general way, the characteristics and performance of a system thus depend on the lifetime of said system. [0005] As far as the power steering mechanism is concerned, these characteristics and performances are in particular changes to some of the constituent materials of the mechanism components (such as creep, hardening or wear of rubber parts), to the occurrence of backlash, to the loss or change of lubricants, Or it is also sensitive to changes in internal friction that affect the operation of ...

Claims

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Application Information

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IPC IPC(8): B62D15/00B60S5/00B60R16/023
CPCB60R16/0234B60S5/00B62D15/00B62D5/0481G07C5/0808
Inventor 塞巴斯蒂安·布尔德雷帕斯卡·莫莱尔罗马里克·帕瑞特克里斯多夫·瑞维尔
Owner JTEKT EURO
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