| 摘要 |
PROBLEM TO BE SOLVED: To improve the determination accuracy in a tire abnormality determining device of dynamic loaded radius system for determining presence/absence of any tire abnormality according to the fact that there is a possibility of generating tire abnormality in any one of wheels if the differential wheel speed is present between a plurality of wheels of a vehicle. SOLUTION: One overall tire abnormality value VGA representing the wheels is calculated based on a plurality of wheel speeds V** (S1) detected for each of the plurality of wheels in the vehicle (S3), and it is determined that tire abnormality occurs when the overall tire abnormality value is deviated from the threshold (S9-S11). In addition, the wheel having the possibility of an abnormal tire out of the plurality of wheels is specified as the wheel with the possibility of abnormality (S4), and the threshold is changed based on the result (S5-S8).
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