Method of improving pneumatic tire vibration characteristics

Patent metadata

Field	Value
Publication number	US-11148486-B2
Application number	US-201816179189-A
Country	US
Kind code	B2
Filing date	Nov 2, 2018
Priority date	Nov 2, 2017
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method for designing a pneumatic tire to have improved vibration characteristics. Dynamic testing of the tire detects a) respective frequencies of a plurality of radial vibration modes of the tire, and b) respective frequencies of a plurality of torsional vibration modes of the tire. The testing may determine that a first interval between the frequency of an even-numbered radial vibration mode and the frequency of an even-numbered torsional vibration mode is less than a first threshold, and/or may determine that a second interval between the frequency of an odd-numbered radial vibration mode and the frequency of an odd-numbered torsional vibration mode is less than a second threshold. One or more design parameter of the tire is/are modified to increase at least one of first interval and the second interval to the respective first or second threshold.

First claim

What is claimed is:

1. A method of improving vibration characteristics of pneumatic tires, comprising:
performing dynamic testing on a test tire to detect a) respective frequencies of a plurality of radial vibration modes of the test tire, and b) respective frequencies of a plurality of torsional vibration modes of the test tire;
determining that a first interval between the detected frequency of an even-numbered radial vibration mode and the detected frequency of an even-numbered torsional vibration mode is less than a first threshold, or determining that a second interval between the detected frequency of an odd-numbered radial vibration mode and the detected frequency of an odd-numbered torsional vibration mode is less than a second threshold; and
manufacturing another tire having same design parameters as the test tire except for a running angle of belt cords relative to a main plane of the another tire such that at least one of the first interval and second interval of the another tire is closer to the respective first threshold and second threshold.

2. The method of claim 1 , wherein the first threshold or the second threshold is 5 Hz.

3. A method of manufacturing a pneumatic tire, comprising:
identifying a first frequency of an even-numbered radial vibration mode of a tire;
identifying a second frequency of an even-numbered torsional vibration mode of the tire;
calculating an interval between the first and second frequencies;
modifying a design parameter of a tire component to increase the interval to above a threshold, wherein the tire component is a belt structure having at least one belt ply, the at least one belt ply having belt cords, and the design parameter is a running angle of the belt cords relative to a main plane; and
manufacturing another tire with the modified design parameter of the tire component.

4. The method of claim 3 , wherein the first threshold and/or the second threshold is 5 Hz.

5. A method of manufacturing a pneumatic tire, comprising:
identifying a first frequency of a radial vibration mode of a tire;
identifying a second frequency of a torsional vibration mode of the tire;
calculating an interval between the first and second frequencies; and
modifying a design parameter of a tire component to increase the interval to above a threshold, wherein the tire component is a belt structure having at least one belt ply, the at least one belt ply having belt cords, and the design parameter is a running angle of the belt cords relative to a main plane; and
manufacturing another tire with the modified design parameter of the tire component.

6. The method of claim 5 , wherein the threshold is 5 Hz.

7. The method of claim 5 , wherein radial vibration mode and the torsional vibration mode are both even-numbered or are both odd-numbered.

Assignees

• Ford Global Tech Llc

Inventors

• Boden Arne
• Rohweder David Scott
• Heyden Arne

Classifications

• B60C2009/2012

  with particular configuration of the belt cords in the respective belt layers · CPC title

• B60B2900/131

  Vibrations · CPC title

• B60C99/006 Primary

  Computer aided tyre design or simulation · CPC title

• B60C9/18

  Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers · CPC title

• B60C19/002

  Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior · CPC title