IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0886875
(2004-07-08)
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발명자
/ 주소 |
- Bochkor,Christopher Gerard
- Bowers,Paul Anthony
- Hirschfelt,Linda Rozelle
- Marley,Michael David
- Monnot,Michael John
- Richards,Gary William
|
출원인 / 주소 |
- The Goodyear Tire &
- Rubber Company
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인용정보 |
피인용 횟수 :
1 인용 특허 :
8 |
초록
▼
A laboratory test for general tire durability can produce results comparable to the GM-ATE road test. A passenger tire is mounted in a test machine and run at approximately 50 mph (80 kph), at maximum rated inflation pressure, with at least 100% maximum rated radial load, with approximately 25% of t
A laboratory test for general tire durability can produce results comparable to the GM-ATE road test. A passenger tire is mounted in a test machine and run at approximately 50 mph (80 kph), at maximum rated inflation pressure, with at least 100% maximum rated radial load, with approximately 25% of the test duration being performed with lateral force comprised of approximately equal portions of right and left steering, the remainder of the test being performed without lateral force (straight portions). A test segment comprises repeating a loading cycle a plurality of times until approximately 5000 miles have accumulated, and multiple test segments are performed until 16,000 miles have been accumulated. The test is paused and the tire is visually inspected several times during the test segments, including at the end of the test.
대표청구항
▼
What is claimed is: 1. Method of testing a radial passenger tire for durability, comprising the steps of: mounting the tire in a test machine; running the tire at approximately 50 mph (80 kph), at maximum rated inflation pressure, with at least 100% maximum rated radial load, with approximately 25%
What is claimed is: 1. Method of testing a radial passenger tire for durability, comprising the steps of: mounting the tire in a test machine; running the tire at approximately 50 mph (80 kph), at maximum rated inflation pressure, with at least 100% maximum rated radial load, with approximately 25% of the test duration being performed with lateral force comprised of approximately equal portions of right and left steering, the remainder of the test being performed without lateral force (straight portions); and with the radial load held constant, performing a loading cycle consisting of 225 seconds at zero lateral force, 75 seconds at positive lateral force, 225 seconds at zero lateral force, and 75 seconds at negative lateral force. 2. Method, according to claim 1, wherein the lateral force is approximately 130 pounds (60 kg force); the radial load is set to 122% of T&RA maximum load at maximum rated inflation pressure for the entire duration of the test; the tire inflation pressure is approximately 35 psi (240 kPa); and the lateral force is 짹8% of T&RA maximum load at maximum rated inflation pressure. 3. Method, according to claim 1, including the steps of ramping to positive lateral force in 10 seconds, ramping to zero lateral force in 10 seconds, ramping to negative lateral force in 10 seconds, and ramping to zero lateral force in 10 seconds. 4. Method, according to claim 1, wherein a test segment comprises repeating the loading cycle a plurality of times until approximately 5000 miles have accumulated. 5. Method, according to claim 4, further comprising performing multiple test segments. 6. Method, according to claim 5, further comprising performing multiple test segments until 16000 miles have been accumulated. 7. Method, according to claim 5, further comprising pausing the test and visually inspecting the tire several times during the test segments, including at the end of the test. 8. Method, according to claim 5, further comprising during selected pauses in the test segments, and at the end of the test, removing the tire and checking for internal damage using shearography. 9. Method, according to claim 1, wherein the tire is driven by a roadwheel. 10. Method, according to claim 1, wherein the roadwheel is a smooth roadwheel. 11. Method, according to claim 1, wherein three tires of a given construction are tested, and if any of the three tires sustain visual damage during the test, the tire construction meets the end of the test condition. 12. Method of testing a tire for durability, comprising: mounting the tire in a test machine comprising a road wheel, engaging the tire with the road wheel; causing the tire to be rotated at a speed; setting a radial load on the tire; controlling lateral forces on the tire; and further comprising setting the radial load to be between 50% and 150% of a maximum rated load at a maximum rated inflation pressure, and maintaining the radial load is essentially constant throughout the test. 13. Method, according to claim 12, wherein the road wheel is smooth. 14. Method, according to claim 12, further comprising performing the test at 100 degrees F. 짹10 degrees F. 15. Method, according to claim 12, further comprising setting the tire inflation pressure to a specified maximum rated inflation. 16. Method, according to claim 12, wherein the tire inflation pressure is set with the tire at ambient temperature and the tire is capped, allowing the pressure to change during the test. 17. Method, according to claim 12, further comprising controlling the speed of the tire to within 짹2 mph. 18. Method, according to claim 12, further comprising establishing a loading strategy which includes straight rolling portions interspersed with steering portions. 19. Method of testing a tire for durability, comprising: mounting the tire in a test machine comprising a road wheel, engaging the tire with the road wheel; causing the tire to be rotated at a speed; setting a radial load on the tire; controlling lateral forces on the tire; and further comprising controlling the lateral force to be between 2% and 45% of a maximum load at maximum rated inflation pressure.
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