EP0000458A1 - Luft reifen - Google Patents

Luft reifen Download PDF

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Publication number
EP0000458A1
EP0000458A1 EP78400037A EP78400037A EP0000458A1 EP 0000458 A1 EP0000458 A1 EP 0000458A1 EP 78400037 A EP78400037 A EP 78400037A EP 78400037 A EP78400037 A EP 78400037A EP 0000458 A1 EP0000458 A1 EP 0000458A1
Authority
EP
European Patent Office
Prior art keywords
tire
profile
mixture
filling
carcass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP78400037A
Other languages
English (en)
French (fr)
Other versions
EP0000458B1 (de
Inventor
Michel Balland
Daniel Moers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
Original Assignee
Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA filed Critical Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
Publication of EP0000458A1 publication Critical patent/EP0000458A1/de
Application granted granted Critical
Publication of EP0000458B1 publication Critical patent/EP0000458B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10513—Tire reinforcement material characterized by short length fibers or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10819—Characterized by the structure of the bead portion of the tire
    • Y10T152/10837—Bead characterized by the radial extent of apex, flipper or chafer into tire sidewall
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10819—Characterized by the structure of the bead portion of the tire
    • Y10T152/10846—Bead characterized by the chemical composition and or physical properties of elastomers or the like

Definitions

  • the invention relates to tire casings, in particular to tires with a radial carcass and a reinforced crown and it has more specifically the object of improving the construction of these tires with a view to giving them better endurance and better road behavior.
  • the beads of the tires each comprise at least one inextensible bead surmounted by a hard rubber profile generally having a triangular section, the carcass ply or plies being folded around this bead / profile assembly.
  • the main function of the filling profile is to achieve a gradual transition in stiffness between the very rigid lower part of the bead and the flexible and thin part of the sidewall. This transition can be measured depending on whether it is desired to accentuate such or such a property of the tire, either for example the property of comfort, or the properties of behavior and handling. This can be achieved by choosing a greater or lesser hardness and height for the filling profile. However, these means are limited by manufacturing requirements and the risks of altering other properties of the tire.
  • Hard rubber filling profiles and great height are favorable to road behavior (course stability, quick responses to changes of direction) but they have poor endurance to flexions repeated vertical flanks so that observes tire failures by rupture of the profiles and carcass plies a little above the rim flanges.
  • Low-profile filling profiles give tires with better tire endurance but with worse road handling.
  • This defect can be corrected by introducing additional reinforcing elements such as "flippers" (strips of fabric folded around the rod-profile assembly), reinforcing strips applied to the folded edges of the carcass or transition gums extending the profile towards the side. But these palliatives increase the number of elements to be assembled, the manufacturing cost and the risk of poor workmanship.
  • the tire illustrated by way of example in FIG. 1 is a "Tourist” tire. It comprises a radial carcass 10 consisting of a ply or several superimposed plies of rubberized fabric without frame or light frame, made of flexible textile or metallic cords oriented along the meridian planes of the tire. The edges 11 of this carcass are folded each, from the inside to the outside, around the assembly formed by the rod 12 and the filling profile 14 surmounting this rod. These folded edges 11 are covered by the rim gums 13 in a rubbery mixture resistant to abrasion in contact with the rims of the rim.
  • the top of the carcass 10 is hooped by a reinforcement belt 16, circumferentially inextensible, constituted for example by one or more plies of rubberized fabric of textile or metallic cords.
  • This belt is covered by the tread 17 having a tread suitable for the use of the tire.
  • the sides of the carcass are covered by the side strips 18 in flexible rubber mix.
  • the filling profile 14 has a general section of triangular shape tapered upwards with a height such that the top of this profile is located at a distance h from the base of the bead of between 0.2 and 0.5 times the height H of the tire section.
  • This profile 14 is made of a rubbery mixture reinforced with short fibers, this mixture being worked so that at least a significant portion of these fibers are oriented mainly in the radial or meridian direction of the tire.
  • this mixture has an anisotropy marked by its properties of resistance to elongation, this resistance being in the radial direction at least twice greater than the resistance measured in the other orthogonal directions (anisotropy ratio 2/1 or more).
  • fibrous mixtures For the production of fibrous mixtures, it is possible to use various fiber contents as well as various kinds of fibers as to their nature, their length and their fineness, according to the techniques adopted for their mixing with the rubber matrix and for giving them a more or less advanced degree of orientation, the main thing being to obtain for these mixtures the desired anisotropy characteristics. Good results have been obtained with fibrous mixtures containing from 10 to 75 parts of fibers by weight per 100 parts of rubber, the fibers incorporated being cellulose fibers "Santoweb" from the company Monsanto Cy having lengths between 0.5 at 3 mm and a diameter of the order of 0.01 mm.
  • the test used to assess the endurance of the beads consists in turning the tires in contact with a rotary flywheel at a speed of 80 km / hour under a load and a pressure equal to 165% of the load and the normal pressure and to measure the time necessary for the appearance of a failure in the area of the beads.
  • FIG. 2 is an endurance diagram giving the times T from which the tires tested show a failure putting them out of use, these times being worn as a function of the h / h ratios. It can be seen that the tires comprising filling profiles 14 in mixtures A or B not in accordance with the invention have good endurance of the beads only when the heights of the filling profiles are less than 0.3H, an average endurance when '' they have a height greater than 0.5 H and a significantly worse endurance in the range of heights between 0.3 and 0.5 H.
  • those of the tourist tires tested having filling profiles 14 in an anisotropic fibrous mixture C according to the invention show excellent fatigue endurance. in the range of heights between 0.3 and 0.5 H for which the tires have the best and most pleasant driving behavior for the majority of drivers. It turns out that these filling profiles in anisotropic fibrous mixture have their greatest resistance to elongation in the radial direction of the tire, making it possible to obtain the best endurance / road behavior compromises.
  • the folded edges 11 of the carcass can be provided to rise more or less high towards the side so as to completely or partially envelop the external face of the filling profile 14, this in order to adjust the behavior properties at will.
  • this adjustment can also be made by acting on the properties of the profiles 14 by varying the content or characteristics of the fibers or the hardness of the mixture by the usual routes. It is thus possible to minimize the length of the folded edges 11 of the carcass so that they do not substantially exceed the upper level of the rods, which saves relatively expensive material.
  • the invention is not limited to the application to the radial tourist tires described above. It can also be applied to other categories than tourist tires, namely tires for trucks and vans, agrarian, civil engineering or aircraft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Reinforced Plastic Materials (AREA)
EP78400037A 1977-07-11 1978-06-27 Luft reifen Expired EP0000458B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7721399 1977-07-11
FR7721399A FR2397296A1 (fr) 1977-07-11 1977-07-11 Enveloppe de pneumatique

Publications (2)

Publication Number Publication Date
EP0000458A1 true EP0000458A1 (de) 1979-01-24
EP0000458B1 EP0000458B1 (de) 1980-09-03

Family

ID=9193263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78400037A Expired EP0000458B1 (de) 1977-07-11 1978-06-27 Luft reifen

Country Status (6)

Country Link
US (1) US4236563A (de)
EP (1) EP0000458B1 (de)
AT (1) AT357421B (de)
DE (1) DE2860130D1 (de)
FR (1) FR2397296A1 (de)
IT (1) IT1108071B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114994A2 (de) * 1983-01-28 1984-08-08 Continental Aktiengesellschaft Fahrzeugrad
AU589403B2 (en) * 1985-02-28 1989-10-12 Sumitomo Rubber Industries, Ltd. Radial tire for passenger cars
EP0339511A2 (de) * 1988-04-27 1989-11-02 Bridgestone/Firestone, Inc. Gürtelreifen für Fahrzeuge
EP0604108A1 (de) * 1992-12-14 1994-06-29 Sumitomo Rubber Industries Ltd. Radiale Luftreifen
WO2015058016A1 (en) * 2013-10-18 2015-04-23 E. I. Du Pont De Nemours And Company Tire apex structure

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362200A (en) * 1980-10-20 1982-12-07 Dayco Corporation Pneumatic tire
JPS6124605A (ja) * 1984-07-16 1986-02-03 Bridgestone Corp 高性能空気入りタイヤ
US4609023A (en) * 1984-12-19 1986-09-02 The Goodyear Tire & Rubber Company Pneumatic tire with sidewall insert
US4871004A (en) * 1988-02-17 1989-10-03 The Goodyear Tire & Rubber Company Rubber containing aramid pulp reinforcement
US5198050A (en) * 1989-04-18 1993-03-30 Pirelli Armstrong Tire Corporation Composite combination bead and bead filler
CA2079522A1 (en) * 1991-09-30 1993-03-31 Yukishige Adachi Pneumatic radial tire
US5576104A (en) 1994-07-01 1996-11-19 The Goodyear Tire & Rubber Company Elastomers containing partially oriented reinforcing fibers, tires made using said elastomers, and a method therefor
US5513683A (en) 1994-07-01 1996-05-07 The Goodyear Tire & Rubber Company Tires made using elastomers containing springy fibers
DE19813385A1 (de) * 1998-03-26 1999-09-30 Continental Ag Luftreifen mit einem Kernprofil
JP3090444B2 (ja) 1998-06-19 2000-09-18 住友ゴム工業株式会社 空気入りタイヤ
US8800620B2 (en) * 2006-03-27 2014-08-12 The Goodyear Tire & Rubber Company Tire with rubber tread composed of a primary and at least one lateral tread portion containing a dispersion of short carbon fibers
US20070221309A1 (en) * 2006-03-27 2007-09-27 Cohen Martin P Tire having belt ply edge protector
JP2007276694A (ja) * 2006-04-10 2007-10-25 Sumitomo Rubber Ind Ltd 空気入りタイヤ
US20080115871A1 (en) * 2006-11-16 2008-05-22 Paul Harry Sandstrom Tire having a sidewall component containing a dispersion of adhesive coated short carbon fiber reinforcement
JP5342670B2 (ja) * 2012-04-25 2013-11-13 東洋ゴム工業株式会社 空気入りタイヤ
AT518850B1 (de) 2016-07-13 2021-11-15 Avl List Gmbh Verfahren zur simulationsbasierten Analyse eines Kraftfahrzeugs

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148899B (de) * 1960-12-31 1963-05-16 Dunlop Gummi Cie Ag Deutsche Wulsteinlage fuer Luftreifen
FR2075543A5 (de) * 1970-01-15 1971-10-08 Dunlop Co Ltd
FR2144807A1 (de) * 1971-07-06 1973-02-16 Monsanto Co
US3802478A (en) * 1970-04-16 1974-04-09 Monsanto Co A pneumatic tire containing high modules discontinuous fiber reinforced member
NL7408509A (de) * 1973-06-26 1974-12-30
FR2261888A1 (de) * 1974-02-26 1975-09-19 Kleber Colombes
DE2615414A1 (de) * 1975-04-18 1976-10-28 Uniroyal France Fahrzeugluftreifen mit einem gummi- fuellelement in jedem wulstbereich oberhalb der wulstringe
US4019551A (en) * 1976-01-23 1977-04-26 The Goodyear Tire & Rubber Company Chipperless radial ply tire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841378A (en) * 1970-01-15 1974-10-15 Dunlop Ltd Pneumatic tire having fleece bead reinforcements
US3697364A (en) * 1970-04-16 1972-10-10 Monsanto Co Discontinuous cellulose reinforced elastomer
US3945420A (en) * 1970-08-05 1976-03-23 Semperit Ag Molded article formed of fiber reinforced material
US4067373A (en) * 1973-01-10 1978-01-10 Pneumatiques Caoutchouc Manufacture Et Plastiques Kleber-Colombes Tires
US4120338A (en) * 1976-10-04 1978-10-17 Mirtain Henri J Pneumatic tire having an improved heel structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148899B (de) * 1960-12-31 1963-05-16 Dunlop Gummi Cie Ag Deutsche Wulsteinlage fuer Luftreifen
FR2075543A5 (de) * 1970-01-15 1971-10-08 Dunlop Co Ltd
US3802478A (en) * 1970-04-16 1974-04-09 Monsanto Co A pneumatic tire containing high modules discontinuous fiber reinforced member
FR2144807A1 (de) * 1971-07-06 1973-02-16 Monsanto Co
NL7408509A (de) * 1973-06-26 1974-12-30
FR2261888A1 (de) * 1974-02-26 1975-09-19 Kleber Colombes
DE2615414A1 (de) * 1975-04-18 1976-10-28 Uniroyal France Fahrzeugluftreifen mit einem gummi- fuellelement in jedem wulstbereich oberhalb der wulstringe
US4019551A (en) * 1976-01-23 1977-04-26 The Goodyear Tire & Rubber Company Chipperless radial ply tire

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114994A2 (de) * 1983-01-28 1984-08-08 Continental Aktiengesellschaft Fahrzeugrad
EP0114994A3 (de) * 1983-01-28 1985-05-22 Continental Aktiengesellschaft Fahrzeugrad
AU589403B2 (en) * 1985-02-28 1989-10-12 Sumitomo Rubber Industries, Ltd. Radial tire for passenger cars
EP0339511A2 (de) * 1988-04-27 1989-11-02 Bridgestone/Firestone, Inc. Gürtelreifen für Fahrzeuge
EP0339511A3 (en) * 1988-04-27 1990-10-31 The Firestone Tire & Rubber Company Radial tyre for motor vehicles
EP0604108A1 (de) * 1992-12-14 1994-06-29 Sumitomo Rubber Industries Ltd. Radiale Luftreifen
US5526859A (en) * 1992-12-14 1996-06-18 Sumitomo Rubber Industries, Ltd. Radial tires including short fibers
WO2015058016A1 (en) * 2013-10-18 2015-04-23 E. I. Du Pont De Nemours And Company Tire apex structure

Also Published As

Publication number Publication date
DE2860130D1 (en) 1980-12-11
ATA500978A (de) 1979-11-15
IT1108071B (it) 1985-12-02
FR2397296B1 (de) 1980-04-04
FR2397296A1 (fr) 1979-02-09
US4236563A (en) 1980-12-02
IT7868636A0 (it) 1978-07-11
EP0000458B1 (de) 1980-09-03
AT357421B (de) 1980-07-10

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