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公开(公告)号：DE69108857T2
公开(公告)日：1995-11-16
申请号：DE69108857
申请日：1991-11-13
Applicant: BRIDGESTONE CORP
Inventor： USHIKUBO HISAO , YAMAZAKI TADASHI , KAMEGAWA TATSUHIKO
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公开(公告)号：DE69108857D1
公开(公告)日：1995-05-18
申请号：DE69108857
申请日：1991-11-13
Applicant: BRIDGESTONE CORP
Inventor： USHIKUBO HISAO , YAMAZAKI TADASHI , KAMEGAWA TATSUHIKO
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公开(公告)号：DE69419678T2
公开(公告)日：1999-12-02
申请号：DE69419678
申请日：1994-01-27
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO , ABE AKIHIKO
Abstract: A design method for a pneumatic tire according to the present invention comprising the steps of determining a tire basic model representing tire cross-sectional configurations including the internal construction and divided into a plurality of elements, an objective function representing a physical value for evaluating a tire performance, a design variable for determining the cross-sectional configurations of the tire, and limiting conditions for limiting the cross-sectional configurations of the tire, obtaining a corrected model of the tire in which the design variable is changed by a unit amount DELTA ri, calculating values of the objective function and limiting conditions of the corrected model, calculating sensitivity for every design variable and calculating an estimated value of a changed amount of the design variable that maximizes the value of the objective function by using sensitivity so calculated while allowing for the limiting conditions, repeating the above steps until the values of the objective function converge, and determining the configuration of a tire based on the design variable when the values of the objective function converge upon the estimated value.
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公开(公告)号：ES2071240T3
公开(公告)日：1995-06-16
申请号：ES91311916
申请日：1991-12-19
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO , HANEDA TSUKASA
Abstract: A pneumatic tire (11) comprises a pair of bead portions (13), a pair of sidewall portions (14) extending outward from the bead portions in the radial direction, and a tread portion (15) between the sidewall portions. In this tire, the sidewall portion ranging from a departing point (39) of the tire from a rim (34) to a tread end (40) is equally divided into three regions (A,B,C), and at least one annular recession (41,42,43) extending circumferentially of the tire is formed in an outer surface of each of these regions (A,B,C) in the sidewall portion so that a maximum depth (d) of each annular recession (41,42,43) is at least 0.3 times an original rubber gauge (D) at a position corresponding to a deepest point (47) of the annular recession.
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公开(公告)号：ES2134341T3
公开(公告)日：1999-10-01
申请号：ES94905215
申请日：1994-01-27
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO , ABE AKIHIKO
Abstract: A design method for a pneumatic tire according to the present invention comprising the steps of determining a tire basic model representing tire cross-sectional configurations including the internal construction and divided into a plurality of elements, an objective function representing a physical value for evaluating a tire performance, a design variable for determining the cross-sectional configurations of the tire, and limiting conditions for limiting the cross-sectional configurations of the tire, obtaining a corrected model of the tire in which the design variable is changed by a unit amount DELTA ri, calculating values of the objective function and limiting conditions of the corrected model, calculating sensitivity for every design variable and calculating an estimated value of a changed amount of the design variable that maximizes the value of the objective function by using sensitivity so calculated while allowing for the limiting conditions, repeating the above steps until the values of the objective function converge, and determining the configuration of a tire based on the design variable when the values of the objective function converge upon the estimated value.
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Patent Agency Ranking
公开(公告)号：DE69419678D1
公开(公告)日：1999-09-02
申请号：DE69419678
申请日：1994-01-27
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO , ABE AKIHIKO
Abstract: A design method for a pneumatic tire according to the present invention comprising the steps of determining a tire basic model representing tire cross-sectional configurations including the internal construction and divided into a plurality of elements, an objective function representing a physical value for evaluating a tire performance, a design variable for determining the cross-sectional configurations of the tire, and limiting conditions for limiting the cross-sectional configurations of the tire, obtaining a corrected model of the tire in which the design variable is changed by a unit amount DELTA ri, calculating values of the objective function and limiting conditions of the corrected model, calculating sensitivity for every design variable and calculating an estimated value of a changed amount of the design variable that maximizes the value of the objective function by using sensitivity so calculated while allowing for the limiting conditions, repeating the above steps until the values of the objective function converge, and determining the configuration of a tire based on the design variable when the values of the objective function converge upon the estimated value.
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公开(公告)号：DE69107293D1
公开(公告)日：1995-03-23
申请号：DE69107293
申请日：1991-12-19
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO , HANEDA TSUKASA
Abstract: A pneumatic tire (11) comprises a pair of bead portions (13), a pair of sidewall portions (14) extending outward from the bead portions in the radial direction, and a tread portion (15) between the sidewall portions. In this tire, the sidewall portion ranging from a departing point (39) of the tire from a rim (34) to a tread end (40) is equally divided into three regions (A,B,C), and at least one annular recession (41,42,43) extending circumferentially of the tire is formed in an outer surface of each of these regions (A,B,C) in the sidewall portion so that a maximum depth (d) of each annular recession (41,42,43) is at least 0.3 times an original rubber gauge (D) at a position corresponding to a deepest point (47) of the annular recession.
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公开(公告)号：ES2379797T3
公开(公告)日：2012-05-03
申请号：ES05766457
申请日：2005-07-20
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , KATO KENSHIRO , TSURUTA MAKOTO , MIYAZONO TOSHIYA , WAKI YOSHIYUKI
Abstract: Un neumático que comprende una carcasa (2) que se extiende toroidalmente entre un par de núcleos (1) de talón embebidos en respectivas porciones de talón, en el que la carcasa se combina con el núcleo del talón, estando la carcasa provista, en un lado interior de la cavidad, de un centro (0) del espesor de la parte de talón en una dirección axial del neumático, que llega hasta una cara del núcleo del talón que está frente al lado interior de la cavidad del neumático y a continuación entra en el núcleo del talón desde el lado interior de la cavidad del neumático, atraviesa el núcleo del talón, sale del núcleo del talón desde la cara radialmente mas interior del núcleo del talón y termina en contacto con la cara radialmente más interna del núcleo del talón.
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公开(公告)号：DE69206473T2
公开(公告)日：1996-07-04
申请号：DE69206473
申请日：1992-05-07
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO
Abstract: A pneumatic tire (11) having a tread divided into a tread portion by grooves (13), in which each of said grooves has an intersect portion and an angle of an island portion surrounded by said intersect portion is different from that of another part at the same island portion. In such a tire, running performances on dry roads are improved by making a distance in radial direction from an outer surface of said tread portion (12) to a bottom (20) of the groove (13) at the intersect portion larger as the angle becomes smaller.
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公开(公告)号：DE69206473D1
公开(公告)日：1996-01-18
申请号：DE69206473
申请日：1992-05-07
Applicant: BRIDGESTONE CORP
Inventor： KAMEGAWA TATSUHIKO , NAKAJIMA YUKIO
Abstract: A pneumatic tire (11) having a tread divided into a tread portion by grooves (13), in which each of said grooves has an intersect portion and an angle of an island portion surrounded by said intersect portion is different from that of another part at the same island portion. In such a tire, running performances on dry roads are improved by making a distance in radial direction from an outer surface of said tread portion (12) to a bottom (20) of the groove (13) at the intersect portion larger as the angle becomes smaller.
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