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    • 4. 发明授权
    • Pneumatic tire tread with divided shoulder
    • 气胎轮胎胎肩分开
    • US4756352A
    • 1988-07-12
    • US847269
    • 1986-04-02
    • Hiroshi OgawaKenichi MotomuraYukimasa YamadaMamoru MamadaHikaru Tansei
    • Hiroshi OgawaKenichi MotomuraYukimasa YamadaMamoru MamadaHikaru Tansei
    • B60C11/00B60C11/01B60C11/04B60C11/12B60C11/03
    • B60C11/01Y10S152/03Y10S152/90
    • A pneumatic tire comprising a tread divided into at least three ribs by at least two main wide grooves extending substantially in a circumferential direction of the tire, wherein a shoulder rib arranged at an outermost end portion of the tread is divided in an axial direction parallel to an axis of rotation of the tire into at least two shoulder rib portions; and between two adjacent shoulder rib portions of said at least two shoulder rib portions, an outer surface of an outer shoulder rib portion is radially inwardly disposed with respect to an extension line of an outer surface of an inner shoulder rib portion arranged inwardly of the outer rib portion. A plurality of sipes may be formed in the vicinity of an outer end of at least one shoulder rib portion other than an outermost shoulder rib portion. Further, a plurality of sipes are formed in the vicinities of outer ends of at least two rib portions other than an outermost rib portion, the quantity of siping being gradually reduced in the axial direction.
    • 一种充气轮胎,其特征在于,具有胎面,该胎面由至少两个沿所述轮胎周向延伸的主宽槽分为至少三个肋,其特征在于,设置在所述胎面的最外端部的胎肩肋沿着与胎面 轮胎的旋转轴线至少两个肩部肋部; 并且在所述至少两个肩肋部分的两个相邻的肩部肋部之间,外肩肋部分的外表面相对于内胎肩肋部分的外表面的延伸线径向向内设置, 肋部。 多个刀槽花纹可以形成在除了最外肩肋部分之外的至少一个肩肋部分的外端附近。 此外,除了最外侧肋部以外的至少两个肋部的外端部附近形成有多个刀槽花纹,所以在轴向上逐渐减小四边形的量。
    • 9. 发明授权
    • Road-surface condition estimating device
    • 路面状况估计装置
    • US09037376B2
    • 2015-05-19
    • US12137588
    • 2008-06-12
    • Hiroshi Ogawa
    • Hiroshi Ogawa
    • G06F19/00B60T8/172
    • B60T8/172B60T2210/12
    • A front-wheel speed is calculated as a wheel speed of driving wheels, a rear-wheel speed is calculated as a wheel speed of driven wheels, a rear-wheel acceleration is calculated as a wheel acceleration of the driven wheels, a front-wheel-speed difference value is calculated as a driving-wheel-speed difference value, a rear-wheel-speed difference value is calculated as a driven-wheel-speed difference value, a rear-wheel-acceleration difference value is calculated as a driven-wheel-acceleration difference value, and a front-wheel ground load is calculated as a ground load acting on the driving wheels. Based on these calculated values, a gradient of a tire-characteristic curve indicating an amount of change in road-surface friction coefficient with respect to an amount of change in slip rate is calculated, and the calculated gradient of the tire-characteristic curve is compared with preset threshold values, whereby a road-surface friction coefficient as a road-surface condition can be determined.
    • 前轮速度被计算为驱动轮的车轮速度,后轮速度被计算为从动轮的车轮速度,后轮加速度被计算为从动轮的车轮加速度,前轮 计算速度差值作为驱动轮速度差值,将后轮速度差值计算为从动轮速度差值,将后轮加速度差值作为从动轮速度差值计算, 车轮加速度差值和前轮地面载荷被计算为作用在驱动轮上的地面载荷。 基于这些计算值,计算表示路面摩擦系数相对于滑移率变化量的变化量的轮胎特性曲线的坡度,并且比较计算出的轮胎特性曲线的坡度 具有预设阈值,由此可以确定作为路面状况的路面摩擦系数。