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发明公开
CN104321209A 缺气保用轮胎 有权

缺气保用轮胎
摘要：
提供以高水平使缺气保用耐久性和乘坐舒适度同时成立、且将重量增加抑制为最小限度的缺气保用轮胎。在胎侧增强型的缺气保用轮胎中，最小壁厚部配置在带束层的端部与轮胎截面高度SH的70％的位置之间，最小壁厚部的厚度Gmin与最大壁厚部17的厚度Gmax的关系为0.5×Gmax≤Gmin≤0.8×Gmax，薄壁区域的长度Lmin与轮胎截面高度SH的关系为0.18×SH≤Lmin≤0.26×SH，胎侧增强层的重量Wr与轮胎总重量Wt、轮胎扁平率R的关系为0.08×Wt×(1-0.2×(1-R/50))≤Wr≤0.18×Wt×(1-0.2×(1-R/50))，比胎体层靠外侧的外侧橡胶部分在轮辋核对线位置的厚度Ga与其最大厚度Gb的关系为0.8×Gb≤Ga≤1.0×Gb，比胎体层靠内侧的内侧橡胶部分在轮辋核对线位置的厚度Gc与厚度Ga的关系为0.7×Ga≤Gc≤1.0×Ga。
摘要（英）：

Provided is a run-flat tire that achieves high levels of both run-flat durability and ride comfort, and minimizes weight increase. In a sidewall-reinforced run-flat tire, the minimum thickness section being positioned between the belt layer end section and the tire cross-sectional height (SH) 70% position, the relationship between the thickness (Gmin) of the minimum-thickness section and the thickness (Gmax) of the maximum thickness section (17) is defined as 0.5 x Gmax<=Gmin<= 0.8 x Gmax; the relationship between the length (Lmin) of the thin region and the tire cross-sectional height (SH) is defined as 0.18 x SH<=Lmin<=0.26 x SH; the relationship between the weight (Wr) of the sidewall-reinforcement layer, the tire total weight (Wt), and the tire oblateness (R) is defined as 0.08 x Wt x (1 - 0.2 x (1 - R/50))<=Wr<=0.18 x Wt x (1 - 0.2 x (1 - R/50)); the relationship between the thickness (Ga) at the rim-check line of the outer-side rubber portion outward of the carcass layer, and the maximum thickness (Gb) thereof, is defined as 0.8 x Gb<=Ga<=1.0 x Gb; and the relationship between the thickness (Gc) at the rim-check line of the inner-side rubber portion inward of the carcass layer and the thickness (Ga) is defined as 0.7 x Ga<=Gc<=1.0 x Ga.

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