Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1999-03-15
2000-05-23
Oen, William
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
G01M 1702
Patent
active
060653310
ABSTRACT:
In a state in which a load is applied thereto, one tire of one lot of tires is made to contact a drum to which a cleat is mounted, and the drum is rotated. Vertical axial force Fz of the tire is measured by an axial force sensor, and vertical displacement X of a tire axis with respect to a drum surface is measured by a displacement sensor. A transfer characteristic Fz/X is calculated as a vertical dynamic stiffness K(.omega.)) of the tire at a time of rolling. A magnitude and phase of vertical dynamic stiffness K(.omega.) of the tire at a low speed and a magnitude and phase of vertical dynamic stiffness K(.omega.) of the tire at a high speed are stored in a personal computer. The other tires within the same lot are set at a low speed uniformity machine one by one, and low speed RFV and RRO are measured for each tire. Prediction of high speed RFV is carried out based on the measured low speed RFV and RRO, the magnitude and phase of the vertical dynamic stiffness K(.omega.) of the tire at a low speed, and the magnitude and phase of the vertical dynamic stiffness K(.omega.) of the tire at a high speed. Prediction of high speed uniformity in a short time is enabled.
REFERENCES:
patent: 3862570 (1975-01-01), Ongaro
patent: 4856324 (1989-08-01), Potts
patent: 5259246 (1993-11-01), Stuyts
patent: 5343918 (1994-09-01), Fontaine
patent: 5396438 (1995-03-01), Oblizajek
Bridgestone Corporation
Oen William
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