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Method and device for determining the circumference of a tyre fitted on a vehicle

A perimeter and tire technology, applied in the field of vehicle assistance systems and parking systems, can solve problems such as errors, and achieve the effect of improving robustness and customer value

Active Publication Date: 2015-04-22
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage here is that the yaw rate, which in this case makes an important contribution to the determination of the tire circumference or wheel circumference, usually has a relative error of up to 3%.

Method used

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  • Method and device for determining the circumference of a tyre fitted on a vehicle
  • Method and device for determining the circumference of a tyre fitted on a vehicle
  • Method and device for determining the circumference of a tyre fitted on a vehicle

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Embodiment Construction

[0027] next by means of Figures 1 to 4 It is explained how to estimate the tire circumference of the tires mounted on the vehicle according to the first embodiment of the invention by means of the method according to the invention and further enable the classification of the mounted tires into a tire size class.

[0028] The tire circumference estimation according to the invention is based on an alignment of two measurement methods, wherein the yaw angle value driven is firstly determined by means of a first measurement method independent of the tire circumference in order to obtain the first Yaw angle measurement and on the other hand is also determined by means of a second measurement method based on the tire circumference assumed to be the initially fitted tire, in order thereby to derive a second yaw angle measurement Hereinafter the yaw angle determined by means of the first measurement method is given by denoted, and the same yaw angle when it is determined by means...

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Abstract

The present invention relates to a method for determining the circumference of the tyres fitted on a vehicle, in which the circumference of the fitted tyres is estimated within a predetermined tolerance band (TB11, TB21, TB31). In so doing, the tyres which can be fitted on the vehicle are divided into at least two defined classes (K1, K2), each with predetermined circumferential intervals (UK1, UK2), such that the circumferential intervals (UK1, UK2) of the two classes (K1, K2) do not overlap and in each case have an interval variable smaller than the tolerance band (TB11, TB21, TB31) of the estimated circumference of the fitted tyres. Furthermore, the fitted tyres are assigned to one of the two classes (K1, K2) with the aid of their estimated circumference. The circumference of the fitted tyre is thus determined with the aid of the specific class allocation of the fitted tyre.

Description

technical field [0001] The invention relates to a method and a corresponding device for ascertaining the circumference of a tire mounted on a vehicle. The invention also relates to a method for automatic parking of a vehicle and a corresponding parking system. Furthermore, the invention relates to a vehicle assistance system with an inventive device for ascertaining the tire circumference of a tire mounted on a vehicle and / or with an inventive parking system. Background technique [0002] The automatic parking system in the vehicle measures possible suitable parking spaces while driving. When the driver wants to park in a parking space, the system calculates the associated trajectory and guides the vehicle into the parking space. It is important here to know the exact tire circumference. Only in this way can it be ensured that the calculated trajectory and the actual trajectory correspond exactly to one another and that the vehicle stops optimally in the parking space. I...

Claims

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Application Information

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IPC IPC(8): G01B5/02
CPCG01B5/025
Inventor C·潘普什B·伊斯克H·厄扎斯岚I·席勒
Owner ROBERT BOSCH GMBH
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