Runflat tire construction with ply cords having a variable modulus of elasticity
    4.
    发明授权
    Runflat tire construction with ply cords having a variable modulus of elasticity 失效
    润滑轮胎结构,帘布层具有可变的弹性模量

    公开(公告)号:US06695025B1

    公开(公告)日:2004-02-24

    申请号:US09959359

    申请日:2001-10-17

    Abstract: The tire (70) of the invention incorporates a carcass ply cord material (93) with variable modulus of elasticity to provide an active sidewall structure (82a, 82b). The variable modulus cord material is incorporated in the axially outwardmost ply (90) of a carcass (80) having two plies (88, 90) separated by elastomeric inserts (89a, 89b) in the sidewalls (82a, 82b). The outer ply cord material (93) provides an increased modulus of elasticity with an increase in elongation. The inner ply cords (91) have a modulus that substantially exceeds that of the outer ply cords (93) under normal loads in the inflated mode. Thus, the inner ply (88) dominates the structural response of the sidewalls (82a, 82b) at normal loads in the inflated mode. Under severe sidewall deflection, such as when the tire is uninflated, the outer ply cord (93) is elongated, increasing its modulus of elasticity and thus, shifting the load from the axially inwardmost ply (88) to the axially outwardmost ply (90).

    Abstract translation: 本发明的轮胎(70)包括具有可变弹性模量的胎体帘布层帘线材料(93),以提供活性侧壁结构(82a,82b)。 可变模量帘线材料结合在具有由侧壁(82a,82b)中的弹性体插入件(89a,89b)分开的两层(88,90)的胎体(80)的轴向最外层(90)中。 外层帘线材料(93)随着伸长率的增加而提供增加的弹性模量。 在充气模式的正常负载下,内层帘线(91)的模量基本上超过外帘布帘线(93)的模量。 因此,在充气模式中,正常负载下,内层(88)支配侧壁(82a,82b)的结构响应。 在严重的侧壁偏转下,例如当轮胎未膨胀时,外帘线(93)是细长的,增加其弹性模量,因此将负载从轴向最内层(88)移动到轴向最外层(90) 。

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