| 摘要 |
PROBLEM TO BE SOLVED: To execute alignment adjustment for fixing driving performance of a vehicle without being influenced by dispersion of tire performance. SOLUTION: A control device 80 determines a spot where the difference of lateral force fluctuation between two front wheels measured by a tire driving device 18 and the difference of lateral force fluctuation between two rear wheels become minimum, and calculates front and rear toe angles at that time. The control device 80 controls an unillustrated turning device so that the front and rear toe angles become the values at that time, to thereby execute the alignment adjustment. Then, a stability factor is calculated by using the front and rear toe angles, and the factor is compared with a reference value. The control device 80 determines that straight line traveling is stable, when the stability factor is equal to the reference value or higher.
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