Diagnostic tire test method

• US 8,887,562 B2
• Filed: 11/22/2011
• Issued: 11/18/2014
• Est. Priority Date: 11/23/2010
• Status: Expired due to Fees

• Current Assignee: Bridgestone Americas Tire Operations LLC (Bridgestone Corporation)
• Original Assignee: Bridgestone Americas Tire Operations LLC (Bridgestone Corporation)
• Inventors: Kidney, Jacob R., Turner, John L.
• Primary Examiner(s): ALLEN, ANDRE J
• Application Number:
  US13/881,325
• Publication Number:
  US 20130205884A1
• Time in Patent Office: 1,092 Days
• Field of Search: 73146-1468
• US Class Current: 73/146
• CPC Class Codes: G01M 17/02 Tyres

Abstract

Provided is a method for testing a tire. The method may comprise performing a first stopping distance test on a tire of a first specification at a first inflation pressure and gathering data about the first stopping distance test. The method may further comprise performing a second stopping distance test on a tire of the first specification at a second inflation pressure and gathering data about the second stopping distance test. The method may further comprise performing a first traction test on a tire of the first specification at either the first inflation pressure or the second inflation pressure and gathering data about the first traction test.

Claims

1. A method for testing a tire, comprising:

performing a first stopping distance test on a first tire-vehicle system comprising a first vehicle and a tire of a first specification at a first inflation pressure;

gathering data about the first stopping distance test;

performing a second stopping distance test on a first tire-vehicle system comprising a first vehicle and a tire of a first specification at a second inflation pressure;

gathering data about the second stopping distance test;

performing a first traction test on a tire of the first specification at either the first inflation pressure or the second inflation pressure; and

,

gathering data about the first traction test.

2. The method of claim 1, wherein gathering data about the first stopping distance test comprises gathering data sufficient to calculate a stopping distance.

3. The method of claim 2, wherein gathering data about the second stopping distance test comprises gathering data sufficient to calculate a stopping distance.

4. The method of claim 3, wherein gathering data about the first traction test comprises gathering data sufficient to calculate mu-slip data.

5. The method of claim 4, wherein gathering data about the first traction test comprises gathering data sufficient to graph a mu-slip curve.

6. The method of claim 5, wherein gathering data about the first stopping distance test and gathering data about the second stopping test comprises, gathering data comprising or sufficient to calculate, wheel angular position, wheel angular velocity, wheel angular acceleration, time, slip rate, braking force in the longitudinal direction, braking force in a direction other than the longitudinal direction, displacement in the longitudinal direction, displacement in a direction other than the longitudinal direction, velocity in the longitudinal direction, velocity in a direction other than the longitudinal direction, acceleration in the longitudinal direction, acceleration in a direction other than the longitudinal direction, or some combination thereof.

7. The method of claim 6, further comprising performing the first stopping distance test on a surface comprising concrete, asphalt, brick, gravel, sand, dirt, snow, water, ice, mud, oil, or some combination thereof.

8. The method of claim 7, further comprising performing the second stopping distance test on a surface that is substantially identical to that upon which the first stopping distance test is performed.

9. The method of claim 8, further comprising performing the first stopping distance test on a dry surface.

10. The method of claim 9, further comprising performing the first traction test on a FlatTrac.

11. A method for testing a tire, comprising:

generating stopping distance data about a first tire-vehicle system comprising;

a first vehicle and a tire of a first specification, said tire being inflated to a first inflation pressure;

generating stopping distance data about a first tire-vehicle system comprising the first vehicle and a tire of the first specification, said tire being inflated to a second inflation pressure;

generating mu-slip data about a tire of the first specification at either the first inflation pressure or the second inflation pressure.

12. The method of claim 11, comprising generating a mu-slip curve from mu-slip data about a tire of the first specification at both the first inflation pressure and the second inflation pressure.

13. The method of claim 12, wherein generating stopping distance data about a first tire-vehicle system comprising a first vehicle and a tire of a first specification, said tire being inflated to a first inflation pressure, comprises

performing a first stopping distance test on a first tire-vehicle system comprising a first vehicle and a tire of the first specification at a first pressure;

and

gathering data about the first stopping distance test.

14. The method of claim 13, wherein generating stopping distance data about a first tire-vehicle system comprising the first vehicle and a tire of the first specification, said tire being inflated to a second inflation pressure, comprises

performing a second stopping distance test on a first tire-vehicle system comprising a first vehicle and a tire of a first specification at a second pressure;

and

gathering data about the second stopping distance test.

15. The method of claim 14, wherein said gathering data about the first stopping distance test and gathering data about the second stopping test comprises, gathering data comprising or sufficient to calculate, stopping distance, wheel angular position, wheel angular velocity, wheel angular acceleration, time, slip rate, braking force in the longitudinal direction, braking force in a direction other than the longitudinal direction, displacement in the longitudinal direction, displacement in a direction other than the longitudinal direction, velocity in the longitudinal direction, velocity in a direction other than the longitudinal direction, acceleration in the longitudinal direction, acceleration in a direction other than the longitudinal direction, or some combination thereof.

16. The method of claim 15, wherein said gathering data about the first stopping distance test and gathering data about the second stopping test is performed using a sensing system enabled to collect data regarding, or sufficient to calculate, stopping distance, wheel angular position, wheel angular velocity, wheel angular acceleration, time, slip rate, braking force in the longitudinal direction, braking force in a direction other than the longitudinal direction, displacement in the longitudinal direction, displacement in a direction other than the longitudinal direction, velocity in the longitudinal direction, velocity in a direction other than the longitudinal direction, acceleration in the longitudinal direction, acceleration in a direction other than the longitudinal direction, or some combination thereof.

17. The method of claim 16, further comprising performing the first stopping distance test on a surface comprising concrete, asphalt, brick, gravel, sand, dirt, snow, water, ice, mud, oil, or some combination thereof.

18. The method of claim 17, further comprising performing the second stopping distance test on a surface that is substantially identical to that upon which the first stopping distance test is performed.

19. The method of claim 18, wherein generating mu-slip data about a tire of the first specification at either the first inflation pressure or the second inflation pressure, comprises

performing a first traction test on a tire of the first specification at either the first inflation pressure or the second inflation pressure;

and

gathering data about the first traction test.

20. The method of claim 19, wherein said performing a first traction test on a tire of the first specification at either the first inflation pressure or the second inflation pressure comprises performing the first traction test on a FlatTrac.