Car tyre

A technology for automobile tires and tires, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc. It can solve problems such as increased load, excessive and very sudden changes in tread marks, and reduced load, etc., to achieve Effects of increased structural rigidity, excellent drivability, and high structural uniformity
CN105377584AActive Publication Date: 2016-03-02PIRELLI TYRE SPA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PIRELLI TYRE SPA
Publication Date
2016-03-02

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Abstract

Tyre (1) having a tread (2) comprising a central portion (L1) located across an equatorial plane (X-X), a first shoulder portion (L2) located towards an outer side of the tyre and a second shoulder portion (L3) located towards an inner side of the tyre, the central portion (L1) being separated from the first shoulder portion by two first circumferential grooves (3, 6), wherein - the said first shoulder portion (L2) and said second shoulder portion (L3) comprise a plurality of first transverse grooves (56, 66) having a first end located substantially at the respective edge of the tread (2), having a width greater than or equal to about 4 mm and an axial extension equal to at least 50% of the width of the shoulder portion in which they are located; - the number of said first transverse grooves (56, 66) of the first shoulder portion (L2) is lower than the number of said first transverse grooves of the second shoulder portion (L3); - the central portion (L1) comprises at least one circumferential rib (9, 10, 11), comprising a plurality of second transverse grooves (16, 17, 18); and - the second transverse grooves (16, 17, 18) have a maximum width smaller than or equal to about 3mm and define in said at least one circumferential rib (9, 10, 11) a void-to-rubber ratio smaller than or equal to about 0.06.
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Description

technical field

[0001] The invention relates to an automobile tire, in particular to a high-performance or ultra-high-performance automobile tire. Background technique

[0002] A motor vehicle tire has a tread provided with blocks delimited by circumferential grooves extending in a generally longitudinal direction and transverse grooves extending in a generally axial direction. The intersecting of these grooves results in the blocks being formed into different suitably conceived shapes and in the arrangement of the blocks along side-by-side circumferential rows each comprised between two successive circumferential grooves.

[0003] Circumferential grooves can affect the directionality and stability characteristics of a running tire with respect to side (slip) thrusts oriented parallel to the tire's axis of rotation.

[0004] The transverse grooves in turn can affect the traction characteristics of the tire, ie the ability of the tire to transmit tangential thrust parallel t...

Claims

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