| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire discriminating device capable of discriminating whether installed tires are summer tires or winter tires without being limited by a traveling road surface. SOLUTION: This tire discriminating device is provided with a rotating speed detecting means for periodically detecting a rotating speed of tires of four wheels of a vehicle, a first operation means for arithmetically operating the slip ratio from a measured value by the rotating speed detecting means, a second operation means for determining a mutual primary regression coefficient and a correlation coefficient of the slip ratio and acceleration-deceleration of the vehicle, and a tire discriminating means for discriminating the tires on the basis of the frequency distribution of accumulated values of the primary regression coefficient by accumulating the values of the primary regression coefficient of prescribed time or the prescribed number according to a value of the obtained correlation coefficient.
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