PNEUMATIC VEHICLE TIRE FOR A VEHICLE

Abstract

The invention relates to a pneumatic vehicle tire for passenger cars comprising a carcass (2), a tread (6) and a belt (7) which has belt plies (7a, 7b) and which is covered radially outwardly by a belt bandage (8) having strengthening elements oriented approximately in the circumferential direction, wherein the belt bandage (8) has at least one belt bandage ply (8a) whichas viewed in the tire cross sectionconsists of three sections, namely a central section (10) and two lateral sections (11, 12), wherein one lateral section (11) is arranged to the left of the central section (10) and one lateral section (12) is arranged to the right of the central section (10) and wherein the strengthening elements of the central section (10) have the construction x1 and wherein the strengthening elements of the two lateral sections (11, 12) have identical cords consisting of at least two twisted-together yarns.

The invention is distinguished by the fact that the two lateral sections (11, 12) are arranged next to the central section (10), that is to say without overlapping with the central section (10), that the density of the strengthening elements in the central section (10) is less than the density of the strengthening elements in the lateral sections (11, 12), and that the end of the lateral sections (13) that points toward the central section (10) in each case has a distance (14) of 5 mm-30 mm, preferably a distance (14) of 5 mm-15 mm, from the outer end of the widest belt ply (15), where the distance (14) is measured in the axial direction (aR).

Claims

1.-9. (canceled)

10. A pneumatic vehicle tire for passenger cars comprising a carcass, a tread and a belt, wherein the belt comprises belt plies and which is covered radially outwardly by a belt bandage having strengthening elements oriented approximately in the circumferential direction; wherein the belt bandage has at least one belt bandage ply which, as viewed in a tire cross section, consists of a central section and two lateral sections, wherein a first lateral section of the two lateral sections is arranged to the left of the central section, wherein a second lateral section of the two lateral sections is arranged to the right of the central section, wherein strengthening elements of the central section have a construction x1, and wherein strengthening elements of the two lateral sections have identical cords of at least two twisted-together yarns; wherein the two lateral sections are arranged next to the central section without overlapping the central section; wherein density of the strengthening elements in the central section is less than densities of the strengthening elements in the lateral sections; wherein ends of the two lateral sections which point toward the central section, in each case, have a distance of from 5 mm to 30 mm from outer ends of a widest belt ply, and wherein the distance is measured in an axial. direction (aR); and, wherein the strengthening elements in the central section have the construction x1 and the strengthening elements in the two lateral sections have a construction x3.

11. (canceled)

12. (canceled)

13. The pneumatic vehicle tire according to claim 10, wherein fineness of each of the strengthening elements of the central section, in comparison to fineness of each of the strengthening elements of the two lateral sections, is a difference of from 1% to 50%, and wherein the strengthening elements of the two lateral sections have a greater fineness value.

14. The pneumatic vehicle tire according to claim 10, wherein the strengthening elements of the central section, and of the two lateral sections, are made of a same material, and wherein the material is selected from the group consisting of polyamide, PES, and PET.

15. The pneumatic vehicle tire according to claim 10, wherein the strengthening elements of the central section are made of a different material than the strengthening elements of the two lateral sections, wherein the strengthening elements of the two lateral sections are made of PA6.6, and wherein the strengthening elements of the central section are made of PET or PA6.

16. (canceled)

17. The pneumatic vehicle tire according to claim 10, wherein the belt bandage has a construction of 1-1-1, 2-2-2, 2-1-2 or 3-2-3.

18. The pneumatic vehicle tire according to claim 10, wherein a twist factor of each multifilament yarn or cord of the strengthening elements of the central section is in a range of from 10 to 100 and wherein =twist [t/m](fineness [tex]/1000).sup.1/2.

Description

[0028] Further features, advantages and details of the invention will now be described in more detail on the basis of the figures, which illustrate a schematic exemplary embodiment. In the figures:

[0029] FIG. 1 shows a cross section through a pneumatic vehicle tire, FIG. 2 shows a cross section through the belt and the belt bandage of the pneumatic vehicle tire of FIG. 1.

[0030] FIG. 1 shows a cross section through a pneumatic vehicle tire for a passenger car, whereas FIG. 2 shows a cross section through the belt and the belt-covering belt bandage of the pneumatic vehicle tire of FIG. 1. Both figures are described together below. The essential components from which the depicted pneumatic vehicle tire is composed are a largely air-impermeable inner layer 1, a carcass 2 which conventionally reaches from the region of the crown of the pneumatic vehicle tire over the sidewalls 3 into the bead regions 4 and is anchored there by wrapping around high-tensile bead cores 5, a profiled tread 6 located radially above the carcass 2 and a belt 7 arranged between the tread 6 and the carcass 2 and comprising two belt plies 7 a, 7 b which is radially outwardly covered by a belt bandage 8 which comprises a single belt bandage ply 8a. The belt bandage ply 8a covers the belt along with its belt edges 9. The belt bandage ply 8 has strengthening elements (not shown) which are wound parallel and approximately in the circumferential direction of the pneumatic vehicle tire along its axial width.

[0031] The belt bandage ply 8a consists of three sections arranged next to one another: a central section 10 and in each case a lateral section 11, 12 adjoining the central section 10. The belt bandage ply 8a thus has the construction 1-1-1. The two lateral sections 11, 12 are thus arranged without overlapping with the central section 10. The end 13 of the lateral sections that points in each case toward the central section 10 in each case has a distance 14 of 5 mm-15 mm from the closest outer end of the widest belt ply 15, where the distance 14 is measured in the axial direction aR. The strengthening elements in the central section 10 have the construction x1 and the strengthening elements in the two lateral sections 11, 12 have the construction x2, with all the strengthening elements of the belt bandage ply 8a consisting of the same material, of PA6.6. The total fineness of each strengthening element is 940 dtex. The construction of each strengthening element in the lateral sections 11, 12 is 470 dtex x2 and the construction of each strengthening element in the central section 10 is 940 dtex x1. By virtue of the different construction of the strengthening elements in the central section 10 with respect to the lateral section 11, 12, the result is a diameter of the strengthening element in the lateral section 11, 12 of 0.40 mm and in the central section 10 of 0.30 mm. The strengthening elements are arranged in the lateral section 11, 12 in a density of 130 epdm and in the central section 10 with a density of 120 epdm. epdm stands for ends per decimeter and describes the density in which the strengthening elements are arranged in the reinforcing ply.

LIST OF REFERENCE SIGNS

[0032] (Part of the description)

[0033] 1 Inner layer

[0034] 2 1Carcass

[0035] 3 Sidewall

[0036] 4 Bead region

[0037] 5 Bead core

[0038] 6 Tread

[0039] 7 Belt

[0040] 7a1st Belt ply

[0041] 7b2nd Belt ply

[0042] 8 Belt bandage

[0043] 8a Belt bandage ply

[0044] 9 Belt edge

[0045] 10 Central section

[0046] 11 Lateral section

[0047] 12 Lateral section

[0048] 13 End of the lateral section

[0049] 14 Distance

[0050] 15 End of the widest belt ply

[0051] rR Radial direction

[0052] aR Axial direction