METHOD FOR ESTIMATING TIRE SLIP ANGLE AND A TIRE WITH SENSORS MOUNTED THEREIN
First Claim
1. A method for detecting a tire slip angle comprising steps of:
- detecting an indication of deformation speed of a tire at a starting point of a contact patch located at each of positions equally spaced apart in an axial direction of a tire placed symmetrically with respect to a center of the tire tread in the axial direction of the tire;
comparing the indications of deformation speed;
thereby estimating the tire slip angle added to the tire.
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Accused Products
Abstract
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.
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Citations
18 Claims
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1. A method for detecting a tire slip angle comprising steps of:
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detecting an indication of deformation speed of a tire at a starting point of a contact patch located at each of positions equally spaced apart in an axial direction of a tire placed symmetrically with respect to a center of the tire tread in the axial direction of the tire; comparing the indications of deformation speed; thereby estimating the tire slip angle added to the tire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A tire with sensors mounted therein, wherein
a single paired sensors or plural paired sensors for detecting indication of deformation speed or for detecting indication of deformation speed and that of deformation amount are arranged at a starting point of a contact patch located at each of positions equally spaced apart in an axial direction of a tire placed symmetrically with respect to a center of a tire tread in an axial direction of the tire.
Specification