Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., to achieve high lateral grip and improve rigidity

Active Publication Date: 2014-09-10
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional block pattern, although some improvements have been made in terms of both traction performance and lateral grip performance, there is still room for further improvement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] Pneumatic tires having tread portions having the specifications shown in Table 1 were tested, and their performances were compared. Also, for comparison purposes without having Figure 7 The tread portion of the curved block shown, and having the Figure 8 The same test was carried out on the pneumatic tire in which the shown substantially U-shaped blocks were arranged on the tread portion near the tire equator.

[0074] Tire size: 205 / 60R15

[0075] Rim size: 7J×15

[0076] Tread contact width TW: 190mm

[0077] Inner circumferential groove (groove width W1, groove depth) = (9.0mm, 11.5mm)

[0078] The first transverse groove (groove width W2, groove depth) = (8.0mm, 11.5mm)

[0079] Inclined groove (groove width W3, groove depth) = (10.0mm, 11.5mm)

[0080] Second transverse groove (groove width W4, groove depth) = (10.0mm, 11.5mm)

[0081] Connecting groove (groove width W5, groove depth) = (7.3mm, 11.5mm)

[0082] Inner transverse groove (groove width W6, gr...

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Abstract

The present invention provides a pneumatic tire capable of achieving both traction performance and lateral grip performance at a high level in off-road running such as rally races and track races. The pneumatic tire has blocks divided into a plurality of blocks in the tread portion, and the installation direction to the vehicle is designated. The pattern block includes a substantially U-shaped curved pattern block, and the substantially U-shaped curved pattern block is connected by the inclined groove, the inner circumferential groove, the first lateral groove, the second lateral groove, and the adjacent tire circumferential direction. The groove is divided, and thus integrally has the width direction portion extending from the inner circumferential groove to the tire equator side, and the inclined portion extending between the inclined grooves, and the curved block is divided between the first lateral groove and the second lateral groove. The bending point formed by the intersection of the centerline between the centerline and the centerline between the inclined grooves is located closer to the inner side of the vehicle than the tire equator, and the width of the bending point and the tire equator in the tire axial direction is 0.10 to 0.25 of the tread contact width times.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of achieving a high balance between traction performance and lateral grip performance in off-road running such as rally races and dirt trials. Background technique [0002] For example, the pneumatic tires for running on uneven roads used in off-road driving, especially the tires for racing on uneven roads used in rally races, etc., in order to shorten the driving time, it is also used to firmly grasp the uneven road. The traction performance of the road surface to transmit driving force to the road surface and the lateral grip performance for suppressing lateral slippage of the tires during cornering are very important. Therefore, in order to achieve both traction performance and lateral grip performance, various proposals have been made regarding block patterns such as the shape and arrangement of blocks (see, for example, Patent Document 1 below). [0003] Patent Document 1: Japanese Patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/117
CPCB60C19/001B60C2011/0374B60C11/0304
Inventor 中野敬太
Owner SUMITOMO RUBBER IND LTD
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