| 摘要 |
PROBLEM TO BE SOLVED: To improve the detection accuracy of tire air pressure by accurately correcting an influence of a tread lift. SOLUTION: Tread lift correction is not executed until a differential pressure decision valueΔD'AVE exceeds a given threshold value Cth, and is executed upon such an excess. Specifically, the differential pressure decision value is corrected only if a tread lift has a truly great influence and correction is necessary, which can prevent dispersion in the differential pressure decision value caused by correction despite a minor tread lift influence. The differential pressure decision value is, however, corrected accurately under a great tread lift influence, so that an accurate differential pressure decision value can be computed and that degradation in detection accuracy of tire air pressure can be prevented.
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