Tire wear analysis method

• US 20050066719A1
• Filed: 10/18/2004
• Published: 03/31/2005
• Est. Priority Date: 01/26/2001
• Status: Active Grant

• Current Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Original Assignee: Bridgestone Firestone North American Tire LLC (Bridgestone Corporation)
• Inventors: Stalnaker, David O., Ulmer, James D., Knuth, Erik F., Turner, John L.
• Granted Patent: US 7,228,732 B2
• Time in Patent Office: Days
• US Class Current: 73/146
• CPC Class Codes: B60C 11/246 Tread wear monitoring systems
• CPC Class Codes: G01M 17/02 Tyres
• CPC Class Codes: G01N 2033/0085 wheels
• CPC Class Codes: G01N 3/56 Investigating resistance to wear or abrasion
• CPC Class Codes: G06F 30/15 Vehicle, aircraft or watercraft design
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30

Abstract

A method of developing a set of input forces used to analyze tire wear includes the steps of characterizing a wear course by driving a vehicle over the wear course and measuring data related to a plurality of forces experienced by the vehicle. A vehicle characterization model for a target vehicle having at least one tire is developed. The vehicle characterization model is used to calculate force data that represents the forces that would be experienced by at least one tire of the characterized vehicle if the characterized vehicle were driven over the characterized wear test course in the first vehicle configuration. The force data is then used to analyze tire wear using a computer prediction technique or by running an indoor wear test on the tire.

Claims

1. A method of predicting tire wear for a tire without running the tire on the vehicle;

the method comprising the steps of;

(a) characterizing a wear course by driving a vehicle over the wear course and measuring data related to a plurality of forces experienced by the vehicle;

(b) characterizing a first vehicle configuration using a vehicle computer model to define a first vehicle characterization model;

(c) using the first vehicle characterization model to calculate first force data that represents the forces that would be experienced by at least one tire of the characterized vehicle if the characterized vehicle were driven over the characterized wear test course in the first vehicle configuration;

(d) using the first force data to create a first set of tire wear data;

(e) characterizing a second vehicle configuration using the vehicle computer model to define a second vehicle characterization model;

(f) using the second vehicle characterization model to calculate second force data that represents the forces that would be experienced by at least one tire of the characterized vehicle if the characterized vehicle were driven over the characterized wear test course in the second vehicle configuration;

(g) using the second force data to create a second set of tire wear data; and

(h) comparing the first and second sets of tire wear data to predict how the differences between the first and second vehicle configurations affect tire wear.

2. The method of claim 1, wherein step (a) includes the step of measuring the fore-aft, lateral, and vertical accelerations experienced by the vehicle when the vehicle is driven over the wear course.

3. The method of claim 2, wherein step (a) further includes the step of measuring the velocity of the vehicle while the vehicle is driven over the wear course.

4. The method of claim 3, wherein step (a) includes the steps of mounting measuring devices to the vehicle and driving the vehicle over the wear course.

5. The method of claim 4, wherein the step of mounting measuring devices to the vehicle includes the step of mounting the measuring devices inside the vehicle.

6. The method of claim 2, wherein step (a) includes the step of measuring at fixed distances along the wear course.

7. The method of claim 2, wherein step (a) includes the step of driving the vehicle over a wear test course that includes public roads.

8. The method of claim 1, further comprising the step of inputting the force data into a tire model to predict the first and second sets of tire wear data.

9. The method of claim 1, further comprising the steps of inputting the force data into a wear test machine and performing indoor wear tests with the wear test machine using the force data to obtain the first and second sets of tire wear data.

10. A method of analyzing tire wear for a vehicle;

the method comprising the steps of;

(a) characterizing a wear course by driving a vehicle over the wear course and measuring data related to a plurality of forces experienced by the vehicle;

(b) creating a vehicle characterization model for a vehicle for which the tire wear is to be analyzed;

(c) using the vehicle characterization model to calculate force data that represents the forces that would be experienced by at least one tire of the characterized vehicle if the characterized vehicle were driven over the characterized wear test course;

(d) using the force data with a first tire to create a first set of tire wear data;

(e) using the force data with a second tire to create a second set of tire wear data; and

(h) comparing the first and second sets of tire wear data to determine which of the first and second tires provides better tire wear performance for the characterized vehicle.

11. The method of claim 10, wherein step (a) includes the step of measuring the fore-aft, lateral, and vertical accelerations experienced by the vehicle when the vehicle is driven over the wear course.

12. The method of claim 11, wherein step (a) further includes the step of measuring the velocity of the vehicle while the vehicle is driven over the wear course.

13. The method of claim 12, wherein step (a) includes the steps of mounting measuring devices to the vehicle and driving the vehicle over the wear course.

14. The method of claim 13, wherein the step of mounting measuring devices to the vehicle includes the step of mounting the measuring devices inside the vehicle.

15. The method of claim 11, wherein step (a) includes the step of measuring at fixed distances along the wear course.

16. The method of claim 10, wherein step (a) includes the step of driving the vehicle over a wear test course that includes public roads.

17. The method of claim 10, further comprising the step of inputting the force data into tire models to predict the first and second sets of tire wear data.

18. The method of claim 10, further comprising the step of performing tests with an indoor wear test machine using the force data to obtain the first and second sets of tire wear data.

19. A method of developing a set of input forces used to analyze tire wear;

the method comprising the steps of;

(a) characterizing a wear course by driving a vehicle over the wear course and measuring data related to a plurality of forces experienced by the vehicle;

(b) creating a vehicle characterization model for a target vehicle having at least one tire wherein the tire wear is to be analyzed for the target vehicle; and

(c) using the vehicle characterization model to calculate force data that represents the forces that would be experienced by at least one tire of the characterized vehicle if the characterized vehicle were driven over the characterized wear test course in the first vehicle configuration.