公开(公告)号：DE3707953A1

公开(公告)日：1987-10-15

申请号：DE3707953

申请日：1987-03-12

Applicant: BRIDGESTONE CORP

Inventor： HAYAKAWA TOSHIO ,  TSUDA TORU ,  TAKAYAMA MASAHIRO ,  HIRUMA MASATO

IPC: B60C11/03 ,  B60C11/04 ,  B60C11/11 ,  B60C11/113 ,  B60C11/117 ,  B60C11/08

公开(公告)号：DE69102517T2

公开(公告)日：1994-11-24

申请号：DE69102517

申请日：1991-10-10

Applicant: BRIDGESTONE CORP

Inventor： YOSHIDA MASAHIRO ,  TAKAYAMA MASAHIRO

IPC: G01H3/00 ,  B60C11/00 ,  B60C11/03 ,  G01M17/02

Abstract: A method of simulating noise generated by a tire using a computer (10), wherein waveforms of the sounds are determined, considering the phase, of which sounds originate from sources of sound, namely, a leading edge (28) which is an edge of the load-supporting portion (24) of the tread and first contacts the road surface when the tire rotates, and a trailing edge (30) positioned opposite to the leading edge. The so-determined waveforms of the sound are integrated over the entire surface of the tread, after that, audible sound of the integrated waveforms is emitted from a headphone (16) as tire-noise.

公开(公告)号：DE69102517D1

公开(公告)日：1994-07-21

申请号：DE69102517

申请日：1991-10-10

Applicant: BRIDGESTONE CORP

Inventor： YOSHIDA MASAHIRO ,  TAKAYAMA MASAHIRO

IPC: G01H3/00 ,  B60C11/00 ,  B60C11/03 ,  G01M17/02

Abstract: A method of simulating noise generated by a tire using a computer (10), wherein waveforms of the sounds are determined, considering the phase, of which sounds originate from sources of sound, namely, a leading edge (28) which is an edge of the load-supporting portion (24) of the tread and first contacts the road surface when the tire rotates, and a trailing edge (30) positioned opposite to the leading edge. The so-determined waveforms of the sound are integrated over the entire surface of the tread, after that, audible sound of the integrated waveforms is emitted from a headphone (16) as tire-noise.

公开(公告)号：JPH08169213A

公开(公告)日：1996-07-02

申请号：JP21364295

申请日：1995-08-22

Applicant: BRIDGESTONE CORP

Inventor： HAYAKAWA TOSHIO ,  TSUDA TORU ,  TAKAYAMA MASAHIRO ,  HIRUMA MASAHITO

IPC: B60C9/08 ,  B60C11/04 ,  B60C11/113 ,  B60C11/12

Abstract: PURPOSE: To secure drainage capacity and improve noise characteristics, by equipping a tire with a circumference main groove in the center zone of a wide tread part having an aspect ratio equal to or less than a specified value, circumference sipes dividing both side zones from the center zone, and blocks, and by causing these sipes to contribute toward the formation of the blocks. CONSTITUTION: A circumference main groove 1 is formed in the center zone C of a wide tread part T having an aspect ratio equal to or less than 0. 8 along its perimeter while inclined main grooves 2, 2', which extend crossing a tire meridian line m, are formed in side zones S, S' between which the center zone C is sandwiched. Further, circumference sipes 3, 3' are cut, along the circumference of the tread part T, in positions dividing the side zones S, S' from the center zone C, while inclined sipes 4, 4' are cut which extend from the circumference sipes 3, 3' toward side ends e, e', crossing the inclined main grooves 2, 2'. Along with this, land parts of the side zones S, S' are divided by the inclined main grooves 2, 2' or the circumference sipes 3, 3' and by the inclined sipes 4, 4', to form blocks 5, 5'. Drainage capacity is thereby maintained even under a wet and high-speed traveling condition, and at the same time noises can be reduced.

公开(公告)号：JPH03136909A

公开(公告)日：1991-06-11

申请号：JP27383389

申请日：1989-10-23

Applicant: BRIDGESTONE CORP

Inventor： YOKOYAMA HIDEKI ,  TAKAYAMA MASAHIRO

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

Abstract: PURPOSE:To reduce a pattern noise without any loss of water drainage quality by constituting peripheral grooves with a plurality of groove width elements connected to each other, and setting the length of a large groove width area to be larger than the length of a peripheral ground plane at the time of a travel. CONSTITUTION:Peripheral grooves 1 to 5 alternately connect wide areas 1A to 5A, and small width areas 1B to 5B, and cause respective groove width variation points 1C to 5C to form a peripheral phase difference from each other. Also, the length of the wide areas 1A to 5A is so set as to be larger than the peripheral length (ground plane length) L of a ground plane 9. Furthermore, a ratio of the groove width of the small width arears 1B to 5B, to the groove width of the wide areas 1A to 5A, is set to 40 to 60%. According to the aforesaid construction, a pattern noise can be prevented without impairing water drainage quality.

公开(公告)号：JP2009210317A

公开(公告)日：2009-09-17

申请号：JP2008051831

申请日：2008-03-03

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

Inventor： TAKAYAMA MASAHIRO

IPC: G01M17/02 ,  G01M17/007

Abstract: PROBLEM TO BE SOLVED: To provide a method and a system for measuring tire touch-down characteristics which enable measurement of the touch-down characteristics of a tire by a relatively simple constitution and in a short time, and a tire model preparing program.
SOLUTION: The measuring system 10 of the tire touch-down characteristics includes a card reader-writer which reads measuring data from a memory card whereon the measuring data regarding the posture of a vehicle in running are recorded, a plurality of actuators 14FL etc. which are attached respectively to different parts of a test vehicle 16 and change the posture of the test vehicle 16 by driving the parts respectively, a control part 12 which controls the actuators 14FR etc. on the basis of the read measuring data so that the characteristics of the touch-down surface of at least one tire in running of the vehicle be reproduced in the test vehicle 16, and pressure sensors 26FL etc. which measure the characteristics of the touch-down surfaces of the tires of the test vehicle 16.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于测量轮胎接触特性的方法和系统，其能够通过相对简单的结构和在短时间内测量轮胎的接触特性，并且轮胎模型准备 程序。 解决方案：轮胎抵抗特性的测量系统10包括读卡器，其读取来自存储卡的测量数据，其中记录关于运行中的车辆的姿势的测量数据，多个致动器14FL 等等，分别附接到测试车辆16的不同部分，并通过分别驱动部件来改变测试车辆16的姿态;控制部分12，其基于读取的测量数据控制致动器14FR等，使得 测试车辆16中再现车辆行驶中的至少一个轮胎的接触表面的特性，并且测量测试车辆16的轮胎的接触表面的特性的压力传感器26FL等 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2002090265A

公开(公告)日：2002-03-27

申请号：JP2000276166

申请日：2000-09-12

Applicant: BRIDGESTONE CORP

Inventor： SAGUCHI TAKANARI ,  TAKAHASHI FUMIO ,  TAKAYAMA MASAHIRO

IPC: G01M17/04

Abstract: PROBLEM TO BE SOLVED: To provide a suspension testing machine whose structure is simplified and which can execute a dynamic test. SOLUTION: The suspension testing machine which is provided with also the test function of a pneumatic tire is composed of a running carriage comprising a steering means and a drive means and a detachable suspension cartridge in which a suspension is built as an assembly together with an accelerator and which is attached to the carriage in a state that the pnematic tire is mounted or as it is. A detection means which detects a load along the axial direction of the suspension is installed at the suspension cartridge.

公开(公告)号：JPH0717222A

公开(公告)日：1995-01-20

申请号：JP16550693

申请日：1993-07-05

Applicant: BRIDGESTONE CORP

Inventor： TAKAYAMA MASAHIRO ,  WADA MITSUISA

IPC: B60C17/04

Abstract: PURPOSE:To provide a pneumatic tire core assembly body which can reduce noise without causing the unbalance of the tire itself by arranging properly a resonance impeding material to damp a cavity resonance sound to be generated by air vibration in a tire cavity. CONSTITUTION:A pneumatic tire core assembly body 4 is arranged on the well 3 of a rim 2, and is furnished with a tire inside resonance impeding material 5 consisting of porous substance or fiberlike substance whose apparent density is not more than 0.1g/cm .

公开(公告)号：JPH06129954A

公开(公告)日：1994-05-13

申请号：JP28185392

申请日：1992-10-20

Applicant: BRIDGESTONE CORP

Inventor： KOBAYASHI KAZUTOMI ,  TAKAYAMA MASAHIRO ,  TAKAHASHI FUMIO ,  HORIUCHI MAMORU

IPC: G01M17/007 ,  G01M17/00 ,  G01M17/02

Abstract: PURPOSE:To measure the force applied from a road surface to a tire accurately while covering a real speed and frequency range. CONSTITUTION:A drum main unit is supported by a drum bearing 18 and it is supported by a post 14 via a piezoelectric detection sensor 16. The circumferential speed of the drum main unit 20 can be set to 50km/h or more and a removable type road surface segment 24 with a surface which is obtained by casting an actual road in a mold is fixed on an outer peripheral. A tire press device 48 for pressing a tire 52 is placed at the side of the drum main unit 20. In the title device 10, the outer peripheral of the drum main unit 20 is covered with the removable type road surface segment 24 with the surface which is obtained by casting an actual road in a mold, thus obtaining a stationary and random road-surface input adapted to the actual road and accurately measuring the road-surface input of three crossing directions over a wide frequency range by the piezoelectric force detection sensor 16.

公开(公告)号：JPH05139109A

公开(公告)日：1993-06-08

申请号：JP30477091

申请日：1991-11-20

Applicant: BRIDGESTONE CORP

Inventor： ITO SHUNGO ,  TAKAYAMA MASAHIRO

IPC: B60C3/06 ,  B60C11/00

Abstract: PURPOSE:To provide a different diameter bead tire which is capable of simultaneously inducing an advantage of maneuvering stability due to the enlargement of a bead diameter and an advantage of vibrating riding comfortableness due to a small diameter bead while uniformity of wear and the stability of straight- ahead travelling are maintained. CONSTITUTION:A different diameter bead tire 10 is formed into a shape in which, for example, two types of tires 195/70R 14 and 225/50R 16 are connected to each other at a center 14 of the maximum tire width, that is, into the shape in which a maximum outer diameter point of the tire conforms to the center 14 of the maximum tire width, and the radius (R1) of curvature forming the outer profile of a tread part 12A on the large diameter bead 16 side is larger than the radius (R2) of curvature forming the outer profile of a tread part 12B on the small diameter bead 18 side (R2