Method of designing tire and tire

Abstract

The invention provides a method of designing tires and the tires. The method of designing a tire comprises a step (20) for determining a resonance frequency (f) which is generated from the tire based on the ground contact length of the tire when a regular internal pressure and a regular load are applied to the tire, a step (30) for determining the number of pitches of a block row, and a step (40) for determining the phase of the block row which is defined by the interval of arrangement between a plurality of blocks constituting the block row when the band of secondary pitch noise frequency (fp2) caused by the block row at the reference speed, i.e. the reference traveling speed of a vehicle to which the tire is attached, overlaps the band of the resonance frequency (f). At step (40), the phase of a block row is determined such that there is a 10-30% deviation between a block row and a second block row with respect to the equator line of the tire.

Description

technical field [0001] The present invention relates to a design method of a tire and a tire having a block row formed along the tire circumferential direction, which is composed of a plurality of blocks divided by circumferential grooves and lateral grooves. Background technique [0002] The main causes of tire noise, which is the noise generated by the tire rolling on the road surface, include the air column resonance sound generated by the air column tube formed by the road surface and the circumferential groove such as the main groove extending along the tire circumferential direction, Pattern vibration noise (pitch noise) caused by the impact of the tread formed with lateral grooves on the road surface. [0003] Conventionally, as a method of reducing air columnar tube resonance noise, a method of forming a wide circumferential groove in the center of the tread is known (for example, Patent Document 1). [0004] Also, as a method of reducing pitch noise, a method of ma...

AI Technical Summary

Problems solved by technology

That is, the method of forming a wide circumferential groove in the center of the tread and the method of forming the circumferential length of the block irregularly affect the degree of freedom in the design of the tread pattern.

Therefore, if a unique tread pattern is adopted in order to reduce air column tube resonance noise and pitch noise, other performances required for tires such as performance on wet roads will be lost.

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