Title:
METHOD AND DEVICE FOR ESTIMATING DYNAMIC STATE QUANTITY OF TIRE, AND TIRE WITH SENSOR
Document Type and Number:
WIPO Patent Application WO/2005/118317
Kind Code:
A1
Abstract:
A tire deformation amount measuring means (11A, 11B) are installed in a tire at positions on the radially inner side than a belt section of a tire tread, such as on the inner surface side of a tire tread, or between an inner liner and plies, or between the plies, or between a belt and the plies, where the positions are, in a radial cross-section of the tire, axisymmetrical and equidistant from the center in the axial direction of the tire. A deformation wave form of the tire is measured, a ground contact time period, which is a time difference of a ground contact end, is detected from the deformation wave form, and indexes kA, kB of a ground contact length are individually calculated from the ground contact time period and a wheel speed detected by a wheel speed sensor (15). After that, an average value k of the indexes kA, kB are calculated, and a load acting on the tire is obtained by using the calculated average value k and a map (18M) representing a relationship between the average values, stored in advance in storage means (18), of indexes of ground contact length. By this, dynamic state quantity of the tire when a load is applied to the tire during traveling can be accurately and stably estimated.
Inventors:
MORINAGA HIROSHI (JP)
WAKAO YASUMICHI (JP)
KOBAYAKAWA AKIRA (JP)
WAKAO YASUMICHI (JP)
KOBAYAKAWA AKIRA (JP)
Application Number:
PCT/JP2005/010132
Publication Date:
December 15, 2005
Filing Date:
June 02, 2005
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
MORINAGA HIROSHI (JP)
WAKAO YASUMICHI (JP)
KOBAYAKAWA AKIRA (JP)
MORINAGA HIROSHI (JP)
WAKAO YASUMICHI (JP)
KOBAYAKAWA AKIRA (JP)
International Classes:
G01L5/00; B60C19/00; B60C23/00; B60C23/06; B60C23/20; G01L5/20; (IPC1-7): B60C19/00; B60C23/00
Foreign References:
| JP2004359203A | 2004-12-24 | |||
| JPH09188113A | 1997-07-22 | |||
| JP2003065871A | 2003-03-05 | |||
| JP2004317443A | 2004-11-11 | |||
| JP2005164337A | 2005-06-23 | |||
| JP2005088832A | 2005-04-07 | |||
| JP2005170222A | 2005-06-30 | |||
| US6539295B1 | 2003-03-25 | |||
| US6539295B1 | 2003-03-25 |
Other References:
See also references of EP 1757464A4
Attorney, Agent or Firm:
Miyazono, Junichi (Fifth Tanaka Bldg. 4-4, Iidabashi 3-chom, Chiyoda-ku Tokyo 72, JP)
Download PDF:
Previous Patent: REINFORCING AIR ENVELOPE FOR SAFETY TIRE
Next Patent: TOWING VEHICLE COMPRISING A TRAILER COUPLING AND ASSOCIATED CONTROL METHOD
Next Patent: TOWING VEHICLE COMPRISING A TRAILER COUPLING AND ASSOCIATED CONTROL METHOD