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Pneumatic tire

A technology for pneumatic tires and tires, applied in tire parts, tire treads/tread patterns, transportation and packaging, etc. problems, to maintain driving stability, improve snow performance, and improve snow removal.

Active Publication Date: 2020-04-24
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in all-season tires, if the groove area is increased to improve snow performance, there is a problem that the driving stability on dry roads will be reduced along with it. Dry driving stability and snow performance

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] The tires of Examples 1 to 5 were produced, the tire size was 205 / 55R16 91V, and the pneumatic tire was provided with: a tread portion extending in the tire circumferential direction in an annular shape; a pair of sidewall portions disposed on both sides of the tread portion ; and a pair of bead portions disposed on the inner side in the tire radial direction of these sidewall portions, such as figure 2 As shown, a pair of first main grooves and a pair of second main grooves extending in the tire circumferential direction are formed on the tread portion, and a first land portion is defined between the pair of first main grooves. A second land portion is defined between the groove and the second main groove, and a third land portion is defined outside the second main groove. On the first land portion, a plurality of first patterns (groove width) extending in the tire width direction are formed. : 1.0mm) and a plurality of transverse grooves (groove width: 1.5mm) extendi...

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PUM

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Abstract

Provided is a pneumatic tire with which snow performance can be improved while satisfactorily maintaining steering stability on dry road surfaces. Disclosed is a pneumatic tire comprising a tread part1, a side wall part 2, and a bead part 3, wherein: a pair of first main grooves 11 and a pair of second main grooves 12 are formed in the tread part 1; a first land part 21 is defined between the first main grooves 11; a second land part 22 is defined between the first main groove 11 and the second main groove 12; a first sipe 31 and a lateral groove 41 are formed in the first land part 21; the first sipe 31 and the lateral groove 41 are arranged at the same angle and connected with one another; the first sipe 31 and the lateral groove 41 respectively open into either one of the first main grooves 11; a second sipe 32 and an auxiliary groove 42 that has a curved shape are formed in the second land part; the second sipe 32 is oriented in the same direction as the first sipe 31; the auxiliary groove 42 includes a first groove part 42A and a second groove part 42B; the intersection angle between the first groove part 42A and the second sipe 32 is within a range of from 45 degrees to 90 degrees; and the length a of the first groove part 42A and the length b of the second groove part 42B satisfy the relationship 0.05 x a <= b <= 0. x a.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as an all-season tire, and more specifically, to a pneumatic tire capable of maintaining good driving stability on a dry road surface and improving snow performance. Background technique [0002] For all-season tires, excellent snow performance is required in snowfall. Therefore, in conventional all-season tires, a plurality of main grooves extending in the tire circumferential direction are provided in the tread portion, and a plurality of ribs or lug grooves extending in the tire width direction are provided in the land portion defined by these main grooves. , snow traction is ensured based on such patterns or lug grooves (for example, refer to Patent Documents 1 and 2). [0003] In addition, it has been proposed to form a plurality of sub grooves having a curved shape in the land portion of the tread portion, and to increase the groove composition by these sub grooves, thereby improving dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/04B60C2011/1209B60C2011/1213B60C2011/0381B60C2011/036B60C2011/0372B60C11/1204B60C11/1236B60C11/1272B60C2011/0365
Inventor 长安政明
Owner THE YOKOHAMA RUBBER CO LTD
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