Method for designing a tire with reduced cavity noise
AssigneeMichelin Recherehe et Technique, S.A.
InventorsDimitri Tsihlas, Eric Vinesse
Life of this patent
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Abstract
A method for designing tires for reduced cavity noise is directed to tires of the type having architectural elements comprising at least one carcass structure anchored in each side of the tire in a bead, each bead having a base which is intended to be mounted on the tire's design mounting rim, a side wall portion extending radially upward from each bead, a reinforced summit comprising reinforcement cords disposed at a given angle, and the side wall portions joining the summit. The method includes the step of arranging the architectural elements to provide a flexibility level of at least a portion of the summit to allow said portion to vibrate at a frequency substantially corresponding to the cavity mode.
Claims10
A method for designing tires, said tires having architectural elements comprising at least one carcass structure anchored in each side of the tire in a bead, each bead having a base which is intended to be mounted on the tire's design mounting rim, a side wall portion extending radially upward from each bead, a reinforced summit comprising reinforcement cords disposed at a given angle, the side wall portions joining said summit, the method comprising the steps of arranging said architectural elements to provide a flexibility level of at least a portion of the summit to allow said portion to vibrate at a frequency substantially corresponding to the cavity mode.
A method for designing tires, said tires having architectural elements comprising at least one carcass structure anchored in each side of the tire in a bead, each bead having a base which is intended to be mounted on the tire's design mounting rim, a side wall portion extending radially upward from each bead, a reinforced summit comprising reinforcement cords disposed at a given angle, the side wall portions joining said summit, wherein said architectural elements are arranged to provide a flexibility level of at least a portion of the summit to allow said portion to vibrate at a frequency substantially corresponding to the cavity mode, the method comprising the steps of:
- mounting a subject tire on a rim and inflating the tire,
- loading the subject tire on a flat surface,
- determining the cavity mode frequencies and the tire mode frequencies,
- comparing a first cavity mode frequency with a tire mode frequency at which the summit deforms to determine a frequency difference,
- measuring the tire circumferential stiffness, and
- modifying the architecture of the tire to reduce the circumferential stiffness to minimize the frequency difference.
Dependencies are inferred from the claim text.