| 摘要 |
The present invention concerns a method for measuring the wear of a tire ( 2 ) having tread pattern elements interconnected by grooves, which is mounted on a wheel fitted on an automobile having a chassis and a suspension system ( 1 ), the method including, when the vehicle ( 13 ) rolling or at rest, the following steps: at a given moment a reference value is measured, which is representative of the distance between, on the one hand, a first point fixed on the suspension system ( 1 ) or a second point fixed on the chassis facing the tire ( 2 ), and on the other hand the top of at least one of the tread pattern elements opposite, ii) in a first case, at the given moment a reference value is measured which represents a distance measured between the first or second point and the bottom of one of the grooves opposite, or, alternatively, in a second case, another reference value is measured subsequently, which represents a distance measured between the first point and one of the tops, and iii the value measured in i) is compared with the reference value measured in ii) to deduce therefrom, in the first case, a wear datum representing the height of the pattern element by differential measurement at the moment, and in the second case, a wear datum representing the change of wear at the top of the element.
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