| 摘要 |
Deformation of a tire is measured by a paired sensor 11 consisting of a 1st and 2nd strain gauges positioned on an inner liner of a tire with sensors mounted therein located equally spaced from and symmetrically with the center in an axial direction. Peak values of deformation speeds at the time of entering into the leading edge occurring at the time when the tire tread enters into the contact portion with a road surface are detected from the deformation wave from by differentiating with respect to time the wave form detected by the paired sensor and thus obtained peak values are designated as indication of deformation speed. Then, based on the ratio of thus obtained deformation wave indication and the Map 15M containing relation between thus obtained deformation speed ratio and time slip angle obtained beforehand, the slip angle of a vehicle under running condition is estimated, thereby enabling estimation of tire slip angle under vehicle running accurately. |
