Method for determining preselected performance characteristics of a tread of a tyre and tyre provided with a tread having optimal characteristics with reference to said performance characteristics

摘要

A method for determining preselected characteristics of a tread (1) of a tyre (2) comprises dividing the tread into a grid of cells (23, 24) forming piles of full, empty and partially full cells (123, 124, 125) and grouped into strips (27, 28) of preselected dimensions; associating with each strip of piles of cells (27, 28) a stiffness value K which is linearly bound to the number n of consecutive piles of full cells (123) by means of an angular coefficient m, which, in turn, is linearly bound to the total number i of empty cells contained in two piles of partially full (125) or empty (124) cells delimiting the consecutive piles of full cells; determining at least one single force F for each strip (27, 28) by means of the stiffness value K, a preselected deformation state and the total transversal and longitudinal forces Ft, associated with all contact areas to evaluate whether they assume values which optimize at least one preselected performance characteristic of the tread.