Title:
TIRE WEAR AMOUNT ESTIMATING METHOD AND TIRE WEAR AMOUNT ESTIMATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/158630
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a method and device which make it possible for an amount of tire wear to be estimated accurately and stably, even on a snow-covered road surface. To this end, the method involves estimating the amount of wear of a tire by: obtaining a differentiated acceleration waveform of a tire radial-direction acceleration waveform; repeatedly performing an operation to calculate a depression end-side differentiated peak value and a trailing end-side differentiated peak value from the differentiated acceleration waveform; calculating a differentiated peak ratio, which is the ratio of the depression end-side differentiated peak value and the trailing end-side differentiated peak value, for each of the obtained depression end-side differentiated peak values and trailing end-side differentiated peak values; extracting, as a wear estimation differentiated peak value, either the depression end-side differentiated peak value or the trailing end-side differentiated peak value, or a calculated value obtained using the depression end-side differentiated peak value and the trailing end-side differentiated peak value, wherein the differentiated peak ratio between the depression end-side differentiated peak value and the trailing end-side differentiated peak value is within a range between a lower limit of 0.6 to 0.8 and an upper limit of between 1.0 and 1.2; and using the plurality of extracted wear estimation differentiated peak values to estimate the amount of wear of the tire.
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Inventors:
MASAGO TAKESHI (JP)
Application Number:
PCT/JP2016/059289
Publication Date:
October 06, 2016
Filing Date:
March 24, 2016
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
B60C19/00; B60C11/24; B60C23/06; G01B21/00; G01M17/02
Domestic Patent References:
| WO2009157516A1 | 2009-12-30 | |||
| WO2009008502A1 | 2009-01-15 |
Foreign References:
| JP2010159031A | 2010-07-22 | |||
| JP2013169816A | 2013-09-02 | |||
| JP2013136297A | 2013-07-11 |
Other References:
See also references of EP 3279013A4
Attorney, Agent or Firm:
MIYAZONO Yasuo (JP)
Yasuo Miyazono (JP)
Yasuo Miyazono (JP)
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