IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0901447
(2001-07-09)
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발명자
/ 주소 |
- Kunsch, Romain
- Koeune, Thierry
- Michel, Edouard
- Croissant, Bernard
- Bormann, Rene
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출원인 / 주소 |
- The Goodyear Tire & Rubber Company
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
5 인용 특허 :
27 |
초록
▼
Methods for improving vehicle steering performance and robustness of that performance include control of non-uniformities in the vehicle's tires, wheels and tire/wheel assemblies as a way to overcome the tendency of the steering systems in certain vehicle types to undergo "steering performance loss.
Methods for improving vehicle steering performance and robustness of that performance include control of non-uniformities in the vehicle's tires, wheels and tire/wheel assemblies as a way to overcome the tendency of the steering systems in certain vehicle types to undergo "steering performance loss." While minimizing lateral force variations (e.g., couple imbalance), a controlled amount of radial and/or tangential force variation is induced in one or more tire/wheel assemblies by means of mass non-uniformity, dimensional non-uniformity, and/or stiffness non-uniformity. For dimensional non-uniformity, the preferred method is to impart a controlled amount of dimensional non-uniformity (preferably radial runout) to the tire and/or the wheel in at least one of the tire/wheel assemblies, followed by statically and dynamically balancing all of the vehicle's tire/wheel assemblies. Preferably, all imparted tire non-uniformities are distributed meridionally symmetrically about the equatorial plane of the tire/wheel assembly.
대표청구항
▼
1. A method of improving steering performance robustness in a vehicle, comprising: mounting a plurality of tire/wheel assemblies on the vehicle, said plurality of tire/wheel assemblies including a number of front tire/wheel assemblies and a number of rear tire/wheel assemblies, each tire/wheel as
1. A method of improving steering performance robustness in a vehicle, comprising: mounting a plurality of tire/wheel assemblies on the vehicle, said plurality of tire/wheel assemblies including a number of front tire/wheel assemblies and a number of rear tire/wheel assemblies, each tire/wheel assembly comprising a tire mounted on a wheel, and imparting a controlled amount of dimensional non-uniformity to at least one of the plurality of tire/wheel assemblies, thereby increasing vehicle vibration in order to improve steering performance robustness. 2. Method, according to claim 1, characterized in that: the at least one of the tire/wheel assemblies is one or more of the front tire/wheel assemblies. 3. Method, according to claim 1, further characterized by the step of: statically and dynamically balancing all of the plurality of tire/wheel assemblies. 4. Method, according to claim 1, characterized by: imparting the dimensional non-uniformity to the tire of the at least one of the tire/wheel assemblies. 5. Method, according to claim 4, characterized by the steps of: imparting the dimensional non-uniformity meridionally symmetrically about the equatorial plane of the tire; and correcting the tire with the dimensional non-uniformity to assure minimum lateral force variation. 6. Method, according to claim 4, characterized by: imparting the dimensional non-uniformity to the tire of the at least one of the tire/wheel assemblies wherein the tire has a plurality of tire components and a plurality of sectors, by imparting a different thickness to at least one tire component in at least one sector of the tire. 7. Method, according to claim 4, characterized by: imparting the dimensional non-uniformity to the tire wherein the tire has a plurality of ply cords, by varying the length of the ply cords around the circumference of the tire. 8. Method, according to claim 7, characterized by: varying the length of the ply cords by inclining bead setters in a tire mold. 9. Method, according to claim 8, characterized by: inclining the bead setters approximately 0.5 degrees to approximately 3 degrees. 10. Method, according to claim 4, characterized by: imparting the dimensional non-uniformity by varying a tread pattern for the tire. 11. Method, according to claim 4, characterized in that: the dimensional non-uniformity is radial runout of the tire comprising at least one radial runout peak. 12. Method, according to claim 1, characterized by: imparting the dimensional non-uniformity as at least one radial runout peak. 13. Method, according to claim 12, characterized in that: the at least one radial runout peak is approximately 0.1 mm to approximately 0.8 mm. 14. Method, according to claim 1, characterized by: imparting the dimensional non-uniformity by placing one or more shims between bead seats of the wheel and beads of the tire in the at least one of the tire/wheel assemblies. 15. Method, according to claim 1, characterized by: imparting the dimensional non-uniformity to the wheel of the at least one of the tire/wheel assemblies. 16. Method, according to claim 15, characterized by the steps of: imparting the dimensional non-uniformity symmetrically about the equatorial plane of the wheel; and correcting the wheel with the dimensional non-uniformity to assure minimum lateral force variation in the tire/wheel assembly utilizing the wheel. 17. Method, according to claim 15, characterized in that: the dimensional non-uniformity is an eccentric wheel. 18. Method, according to claim 15, characterized in that: the dimensional non-uniformity is radial runout of th wheel comprising at least one radial runout peak.
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