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winter tires

A technology for winter tires and tires, applied in the direction of pneumatic tires, tire parts, tire treads/tread patterns, etc., can solve the problems of reducing tire performance, and achieve reduced negative impacts, large grip edges, and large snow capacity effect of ability

Active Publication Date: 2017-08-04
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the arrangement of lug grooves reduces the performance of the tire on snow-free roads (whether dry or wet)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0080] refer to figure 1 , reference numeral 1 generally shows an exemplary embodiment of a tire according to the invention.

[0081] The tire 1 comprises a (invisible) carcass structure arranged circumferentially about an axis Z (substantially coincident with the axis of rotation of the tyre), a belt structure arranged in a radially outer position with respect to the carcass structure and with respect to the Said belt structure is arranged in a radially outer position on a tread band 2 having a radially outer surface 3 arranged in contact with the road surface on which said tire 1 is to roll.

[0082] On said tread band 2 a central annular portion C spanning an axial median plane (not shown) and two rings arranged axially on opposite sides with respect to said central annular portion C can be determined Shaped shoulder parts S1, S2. The central annular portion C is separated from each annular shoulder portion S1 , S2 by a respective circumferential groove 4 . Said portion ...

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PUM

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Abstract

The invention relates to a winter tire with a tread band in which a plurality of blocks (5) are provided for use on snow-covered roads and in the specific conditions of use (especially in acceleration, braking or Optimum performance on dry and wet roads (during turning); each of the aforementioned blocks (5) comprises at least one groove (6) which defines in the respective block (5) Two adjacent block parts (9, 10), each of said block parts (9, 10) comprising a respective surface facing said groove (6), such surface comprising a substantially undulating surface A radially outer portion (61) of the profile, a radially inner portion (62) also having a substantially undulating profile, and a radially outer portion (61) and a radially inner portion (62) arranged between and A middle portion (63) with a generally rectilinear profile.

Description

technical field [0001] The invention relates to a winter tire. Background technique [0002] Such tires are preferably intended to be mounted on the wheels of powerful high-speed vehicles, such as SUVs or especially heavy sports cars. [0003] Winter tires generally comprise a tread band on which a plurality of circumferential and transverse grooves are formed. Such grooves define a corresponding plurality of blocks. Each such block typically has a plurality of grooves. Each groove defines two adjacent block portions in the respective block that are separated by the groove. [0004] The role of the lug grooves is essentially to provide a further grip edge on the snow-covered ground and to accommodate a certain amount of snow in the lug grooves, thereby providing friction with the snow on the road surface, so The friction force is greater than that provided by the tread band itself. Furthermore, due to the greater softness of the compounds usually applied to winter tires...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/12
CPCB60C11/1218B60C2011/1213B60C11/12B60C11/1204B60C5/00B60C11/04B60C11/1222
Inventor R·伯尔佐尼G·科隆博A·阿邦迪奥
Owner PIRELLI TYRE SPA