Title:
RADIAL FORCE VARIATION PREDICTION METHOD, TANGENTIAL FORCE VARIATION PREDICTION METHOD, RADIAL RUN OUT PREDICTION METHOD, TIRE ANGLE ACCELERATION FLUCTUATION PREDICTION METHOD, RADIAL RUN OUT MEASUREMENT APPARATUS, RADIAL RUN OUT ESTIMATION METHOD, INFORMATION ACQUISITION METHOD, AN
Document Type and Number:
WIPO Patent Application WO/2003/034023
Kind Code:
A1
Abstract:
It is possible to significantly reduce a prediction error of the high−speed RFV and the high−speed TFV in a tire having a large PRO growth amount at high speed. Three or more sample tires are extracted from each lot. The PRO and RFV are measured and the method of least squares is used to predict (100) the upper and lower and front and back natural angle frequency, attenuation ratio, upper and lower spring constant, and rolling radius coefficient. By using the PRO measurement apparatus, the PRO during slip is measured. By using an AAV measurement apparatus, an actual measurement value AAVL of the angle acceleration fluctuation at a low speed is measured (102). The PRO and AAV at a high speed are predicted (104) and the actual measurement value and prediction value are used to predict the high−speed RFV and TFV.
Inventors:
OBUNAI KATSUO (JP)
Application Number:
PCT/JP2002/010617
Publication Date:
April 24, 2003
Filing Date:
October 11, 2002
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
OBUNAI KATSUO (JP)
OBUNAI KATSUO (JP)
International Classes:
B60C19/00; G01M17/02; (IPC1-7): G01M17/02; G01M1/16; G01L5/16; B60C19/00
Foreign References:
| JPS62232507A | 1987-10-13 | |||
| JPS6360937U | 1988-04-22 | |||
| JPH07243947A | 1995-09-19 | |||
| JP2001228058A | 2001-08-24 | |||
| JPH01314935A | 1989-12-20 | |||
| JP2001141615A | 2001-05-25 | |||
| JPH08122220A | 1996-05-17 | |||
| JP2001124666A | 2001-05-11 |
Other References:
HIDEO SAKAI: "Taiya kogaku", KABUSHIKI KAISHA GURANPURI SHUPPAN, 5 March 2001 (2001-03-05), pages 299 - 305, XP002962347
"No. 9803 JSAE symposium tire - jodosha-kei no undo to anzensei kojo sentan gijutsu", SOCIETY OF AUTOMOTIVE ENGINEERS OF JAPAN TIRE UNDO TOKUSEI SENMON IINKAI ACTIVE SAFETY HYOKA GIJUTSU SENMON IINKAI HEN, 15 March 1998 (1998-03-15), pages 30 - 35, XP002962348
"No. 9803 JSAE symposium tire - jodosha-kei no undo to anzensei kojo sentan gijutsu", SOCIETY OF AUTOMOTIVE ENGINEERS OF JAPAN TIRE UNDO TOKUSEI SENMON IINKAI ACTIVE SAFETY HYOKA GIJUTSU SENMON IINKAI HEN, 15 March 1998 (1998-03-15), pages 30 - 35, XP002962348
Attorney, Agent or Firm:
Nakajima, Jun (Nakajima & Kato Seventh Floor HK-Shinjuku
Bldg., 3-1, Shinjuku 4-chome Shinjuku-ku Tokyo, JP)
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