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Method and device for estimating a current circumference of wheel

A wheel and perimeter technology, applied in tire measurement, vehicle parts, transportation and packaging, etc., can solve problems such as deviation and high vehicle speed

Pending Publication Date: 2020-02-14
VOLKSWAGEN AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, this leads to large deviations in the calculation of vehicle speed

Method used

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  • Method and device for estimating a current circumference of wheel
  • Method and device for estimating a current circumference of wheel
  • Method and device for estimating a current circumference of wheel

Examples

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Embodiment Construction

[0049] figure 1 A schematic illustration of an embodiment of a device 1 for estimating a current wheel circumference 14 of a wheel 51 arranged on a vehicle 50 is shown. The device 1 comprises input means 2 , computing means 3 , ring memory 4 and output means 5 .

[0050] The input device 2 receives a reference speed 10 of the vehicle 50 determined and provided by the reference device 30 . The reference device 30 may be, for example, a GNSS. Furthermore, the input device 2 receives a wheel speed 11 of a wheel 51 of the vehicle. Wheel speed 11 is detected by a wheel speed sensor (not shown) and is provided as a corresponding signal by, for example, driving dynamics control system 52 (ESC) of vehicle 50 . The input device 2 synchronizes the reference speed 10 and the wheel speed 11 with respect to their time base, so that the data pairs of the reference speed 10 and the wheel speed 11 are based on the same instant. The formed data pairs are supplied to the computing device 3 ...

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Abstract

The invention relates to a method for estimating a current wheel circumference 14 of at least one wheel 51 arranged on a vehicle 50, said method comprising the following steps: (a) determining a reference speed 10 of the vehicle at a point in time (44-47) by means of a reference apparatus 30, (b) detecting a wheel rotational speed 11 of the at least one wheel 51 at said point in time (44-47) by means of a wheel rotational speed sensor, (c) estimating a single wheel-circumference value 13 based on the determined reference speed 10 and the detected wheel rotational speed 11 for said point in time (44-47) by means of a calculation apparatus 3, (d) storing at least the estimated single wheel-circumference value 13 in a circular buffer 4 for said point in time(44-47), (e) repeating steps (a) to(d) for at least one other point in time(44-47), estimating a current wheel circumference 14 based on the single wheel-circumference values 13 stored in the circular buffer 4 by means of the calculation apparatus 3, outputting the estimated current wheel circumference 14 as a wheel circumference signal 15. The invention further relates to an associated device 1.

Description

technical field [0001] The invention relates to a method and a device for estimating a current wheel circumference of at least one wheel arranged on a vehicle. Background technique [0002] For the safe operation of a vehicle, in particular a motor vehicle, it is essential for the driver and / or for the assistance systems of the vehicle to know a reliable value for the current speed of the vehicle. In this case, legal regulations may require that too low a value for the speed is not displayed or provided at any time. [0003] Typically, the speed of the vehicle is determined from detected wheel speed and estimated wheel circumference on at least one wheel, also commonly referred to as a tire. The value of the wheel circumference used here is calculated from the mean value of the wheel circumferences of the tire types specified or permitted for the respective vehicle and an additional safety margin is assigned. This wheel circumference is static and is always greater than th...

Claims

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Application Information

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IPC IPC(8): B60W40/12G01B21/06G01B7/04
CPCB60W40/12G01B21/06G01B7/042B60C11/246B60C2019/004B60C23/061B60W2520/10B60W2520/28B60W2050/0025B60W2556/15G01B21/12G01C22/02
Inventor O.欣兹L.休弗R.兰平
Owner VOLKSWAGEN AG
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