Patent ID: 7769567
Filing Date: 2010-08-03
Classification: B60C

Abstract:
1. A method for forming a tire tread having a tire noise pitch sequence for a pneumatic tire; the method comprising the steps of: selecting three, four, five, six, or seven modulation orders; defining an amplitude for each of the selected modulation orders; defining a phase for each selected modulation order; creating a function for each modulation order that includes the defined amplitude and phase of the modulation order; summing the created functions for each modulation order to create a wave Y having a curve; defining a lug stiffness variation curve (Di) to be the accumulation of the deviation of arc length from arc length of mean pitch size; setting the lug stiffness variation curve equal to the curve of the Y wave to define an equation; solving the equation to obtain a unique set of pitch sizes; using the unique set of pitch sizes to define a tire noise pitch sequence and arranging tread lugs on a tire tread of a pneumatic tire to match the tire noise pitch sequence.