| 摘要 |
PROBLEM TO BE SOLVED: To distinguish whether a tire is a tire for summer or that for winter by comprising a distinguishing means for distinguishing the tire mounted on a driving shaft on the basis of an inverse of a turning radius and a determination value. SOLUTION: When the pressure of a driving wheel is reduced, the differential limited-center turning radius is shifted. When the pressure of a driven wheel is reduced, the calculation itself of the radius is shifted, so that an EDL value (determination value) is moved in parallel in the vertical direction along a line of the difference of left and right driven wheels. It is necessary that the pressure reduction is determined by comparing the horizontal part under a normal pneumatics condition and that of a pressure reduction condition. In the procedure, the DEL values are gathered on a position of an axis of abscissas = 0, that is, on an axis of ordinates (Y axis) during a time when the differential is limited with and without pressure reduction and regardless of the position, by taking the inverse 1/R of the turning radius calculated from the driving shaft, on the axis of abscissas (X-axis), so that the pressure reduction can be easily determined by comparing the determination values on the horizontal parts slightly separated from the axis of ordinates.
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