| 摘要 |
PROBLEM TO BE SOLVED: To precisely correct tire diameter by measuring wheel speed for four wheels, correcting either one wheel speed to the diameter of a minitire, substituting the corrected wheel speed and other measured wheel speeds to a relational expression of wheel base, tread, and wheel speed, and judging the corrected wheel as mini-tire. SOLUTION: To perform an anti-lock brake control even just after the departure of a vehicle, all four wheels are measured by a wheel speed sensor 31 in departure to determine the measured wheel speeds. Of the four wheels 1-4, the wheel speed of either one wheel is predicted as mini-tire diameter, the corrected wheel speed and the other three measured wheel speeds are substituted to a relational expression of wheel base, tread, and wheel speed, and when the relational expression is satisfied, the corrected wheel is judged as mini-tire. Thus, the diameter of tire can be precisely corrected, and the anti-lock brake control can be precisely performed. |
