公开(公告)号：EP2597452A4

公开(公告)日：2015-07-15

申请号：EP11809721

申请日：2011-07-22

Applicant: BRIDGESTONE CORP ,  WSL INST FOR SNOW AND AVALANCHE RES SLF

Inventor： SETA EISUKE ,  NAKAI TATSUYA ,  SCHNEEBELI MARTIN ,  SZABO DENES ,  LOEWE HENNING ,  HEGGLI MARTIN ,  HEMPEL FELIX ,  JAGGI MATTHIAS ,  GRAUPETER JORG

IPC: G01M17/02 ,  B60C99/00 ,  G01M17/06 ,  G06F17/50

CPC classification number: G01M17/027 ,  B60C99/006 ,  G01M17/02 ,  G01M17/06 ,  G06F17/5009 ,  G06F17/5018 ,  G06F17/5095 ,  G06F2217/16

Abstract: Disclosed is a method for predicting tire performance in which a tire model, which comprises a tread pattern capable of imparting deformation by means of ground contact and/or transfer, and a snow model, in which a snow-covered road surface that comes into contact with the tire model is represented, are used to predict tire performance on the snow-covered road surface on the basis of physical quantities that occur in at least either of the tire model and the snow model. The snow model is modeled as an elasto-plastic body or an elastic body, the nonlinearity of the volume compression property of snow is represented by the relationship between the density or volume strain of the snow and the pressure of the snow, and the shear property of the snow is represented by the relationship between the yield stress of the snow and the pressure of the snow.

公开(公告)号：EP3056355A4

公开(公告)日：2016-10-26

申请号：EP14852374

申请日：2014-06-30

Applicant: BRIDGESTONE CORP

Inventor： WAKIYAMA TADASHI ,  HAYASHI SHOJI ,  MATSUNAGA IETOMO ,  WADA MASAKI ,  KOIDE MASAFUMI ,  NAKAI TATSUYA

IPC: B60C11/00 ,  B60C5/00 ,  B60C11/04 ,  B60C11/11

CPC classification number: B60C11/0332 ,  B60C11/0302 ,  B60C11/0304 ,  B60C11/0306 ,  B60C11/1376 ,  B60C2011/0341 ,  B60C2011/0386

Abstract: An object is to improve noise performance of a tire while enhancing movement performance thereof. At least one of the land portions (20) includes an outer wall surface (30) positioned on a vehicle outer side, an inner wall surface (31) positioned on a vehicle inner side, a tread surface (32) on an outer side in a tire radial direction, an outer edge (33) of the tread surface (32) in contact with the outer wall surface (30), and an inner edge (34) of the tread surface (32) in contact with the inner wall surface (31). The tread surface (32) is formed in a convex shape which is smoothly curved between the outer edge (33) and the inner edge (34) and which has a top portion (43) most protruded outward in the tire radial direction, in a cross section of the land portion (20) in a tire width direction. A relationship of Do

公开(公告)号：JP2011079458A

公开(公告)日：2011-04-21

申请号：JP2009234402

申请日：2009-10-08

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： NAKAI TATSUYA ,  SETA EISUKE

IPC: B60C11/04 ,  B60C11/03 ,  B60C11/11 ,  B60C11/13

CPC classification number: Y02T10/862

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire which further improves the performance of hydroplaning resistance when running straight and turning. SOLUTION: This pneumatic tire is constituted by arranging at least two main grooves 2, 3 in the peripheral direction in the direction of tread width and arranging groups of blocks Gs1, Gs2, Gc formed by collecting a plurality of polygonal blocks 13, 14 partitioned by linearly extended grooves 6, 7, 8, having an angular shape of pentagon or more, and being independent from each other and bringing these blocks closely to each other in a cross-stitch manner in the peripheral direction in at least a part of a tread part. In this pneumatic tire, a groove wall 17a on at least a tread shoulder side of the main grooves 2, 3 positioned on the outermost side of the vehicle when mounting this tire on the vehicle among the main grooves 2, 3 in the peripheral direction are inclined in the direction for reducing groove width toward a groove bottom 18, and the crossing angle α of the groove wall 17a for a slope line n drawn on a block surface is 5° or more. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种充气轮胎，其进一步提高了直线运行和转弯时的抗滑动性能。 解决方案：该充​​气轮胎是通过在胎面宽度方向上沿圆周方向布置至少两个主槽2,3并且排列通过收集多个多边形块13形成的块Gs1，Gs2，Gc组而构成的， 14由具有五角形或更大角度形状的线性延伸槽6,7,8分隔开，并且彼此独立并且使得这些块在至少一部分中沿着圆周方向以十字绣方式彼此紧密地彼此靠近 的胎面部分。 在该充气轮胎中，在主槽2,3中沿轮胎方向将车轮安装在车辆上时，位于车辆最外侧的主槽2,3的至少胎面胎肩侧的槽壁17a分别为： 在向凹槽底部18减小槽宽度的方向上倾斜，并且在块表面上绘制的斜线n的槽壁17a的交叉角α为5°或更大。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2012171484A

公开(公告)日：2012-09-10

申请号：JP2011035100

申请日：2011-02-21

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： NAKAI TATSUYA ,  SETA EISUKE

IPC: B60C11/03 ,  B60C11/04 ,  B60C11/11 ,  B60C11/13

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire with a divided block group formed by narrow grooves and wide grooves, which suppresses falling down of the block and which improves drainage.SOLUTION: A plurality of circumferential main grooves 2 are arranged in a tread face, and a land part is divided each between adjoining two circumferential main grooves 2, and between each circumferential main groove and a tread side edge. A circumferential sub-groove 5 with a narrower groove width than that of the circumferential main groove is arranged in the land part, while an independent plurality of blocks of a polygon with more vertices than a pentagon, which is divided by the linealy extended narrow grooves and wide grooves, is provided at least in a portion, and a block number density S per a unit grounded area of a block group composed of the plurality of polygon blocks is within a range of 0.003 to 0.04 pieces/mm.

Abstract translation: 要解决的问题：提供一种充气轮胎，其具有由窄槽和宽槽形成的分割块组，其抑制块的落下并改善排水。 解决方案：多个周向主沟槽2布置在胎面中，并且在相邻的两个周向主槽2之间以及每个周向主槽和胎面侧边缘之间分隔有陆部。 具有比周向主槽的槽宽度窄的周向副槽5布置在焊盘部分中，而具有比五边形更多的顶点的多边形的独立的多个块被线性延伸的窄槽 并且至少部分地设置有宽的槽，并且由多个多边形块组成的块组的单位接地面积的块数密度S在0.003〜0.04个/ mm的范围内 2 。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2011240869A

公开(公告)日：2011-12-01

申请号：JP2010116228

申请日：2010-05-20

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： NAKAI TATSUYA

IPC: B60C19/00 ,  G06F17/50

Abstract: PROBLEM TO BE SOLVED: To provide a simulation method that accurately estimates a speed at which a hydroplaning phenomenon is caused, and to provide a simulation device that executes the simulation method.SOLUTION: The simulation method includes: a torque imparting step of imparting rotation torque to a tire model 10 so that a rotation speed of the tire model 10 rolling on a road surface model 20 on which a fluid model 30 is arranged is increased with the lapse of time; a relative speed calculation step of calculating a relative speed of the tire model 10 rolling on a road surface model 30 with respect to the road surface model 20; and a step of determining the speed at which a hydroplaning phenomenon is caused based on the rotation speed of the tire model 10 and the relative speed.

Abstract translation: 要解决的问题：提供一种精确估计引起滑水现象的速度并提供执行模拟方法的模拟装置的模拟方法。 模拟方法包括：向轮胎模型10施加旋转扭矩的转矩赋予步骤，使得在布置有流体模型30的路面模型20上滚动的轮胎模型10的转速增加 随着时间的流逝; 相对速度计算步骤，计算相对于路面模型20在路面模型30上滚动的轮胎模型10的相对速度; 以及基于轮胎模型10的转速和相对速度来确定引起滑水现象的速度的步骤。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2010254092A

公开(公告)日：2010-11-11

申请号：JP2009105400

申请日：2009-04-23

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： NAKAI TATSUYA

IPC: B60C5/00 ,  B60C11/03 ,  B60C11/04

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire making hydroplaning resisting performance at turning and traveling on a wed road surface and hydroplaning resisting performance at traveling straight ahead on the wed road surface compatible at a high level. SOLUTION: On a tread surface 1, a plurality of circumferential grooves extending in a tread circumferential direction, and a plurality of lateral grooves extending in a tread width direction are arranged. An unsymmetrical pattern is formed about a tire equatorial plane. In an installing posture to a vehicle, the total groove area of the circumferential grooves positioned in the inner side of the vehicle than the tire equatorial plane is made larger than the total groove area of the circumferential grooves position on the outer side of the vehicle. The total groove area of the lateral grooves 7out on the installation outer side than the tire equatorial plane is made larger than the total groove area of the lateral groove 7in on the installation inner side. The total groove area of the grooves on the installation outer side is provided within a range of 70-90% to the total groove area of the groove on the installation inner side. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种在道路表面上转动和行驶时提供滑水阻力性能的充气轮胎，并且在高水平地相互配合的道路表面上行进时的滑水阻力性能。 解决方案：在胎面表面1上布置有沿胎面圆周方向延伸的多个周向槽和沿胎面宽度方向延伸的多个横向槽。 形成关于轮胎赤道平面的不对称图案。 在车辆的安装姿势中，位于车辆内侧的周向槽的总槽面积比轮胎赤道面大，大于车辆外侧的周向槽位置的总槽面积。 使轮胎赤道面的安装外侧的横向槽7out的总槽面积比安装内侧的横向槽7in的总槽面积大。 安装外侧的槽的总槽面积设置在安装内侧的槽的总槽面积的70〜90％的范围内。 版权所有（C）2011，JPO＆INPIT