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tire

A tire and tire circumferential technology, applied in tire parts, tire tread/tread pattern, vehicle parts, etc., can solve the problem of large air column resonance, reduce the air column resonance, and prevent the deformation of the groove wall. , the effect of improving noise performance

Active Publication Date: 2022-04-26
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned tire has a large air column resonance sound caused by the main groove, so there is room for improvement in terms of noise performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0096] Prototype has figure 1 The basic pattern is a tire of size 215 / 60R16. As a comparative example, such as Figure 10As shown, the middle vertical narrow groove b provided in the outer middle land portion a was trial-manufactured and arranged on the outer tread end side than the groove center line of the outer middle land portion a ( Figure 10 middle left) tire. In this tire, the outer middle lateral groove d extends from the inner crown main groove to the middle longitudinal narrow groove b. In addition, the tread portion of the tire of the comparative example, except for the above points, is the same as figure 1 The tread portions shown are virtually identical. The noise performance and handling stability of each test tire were tested. Common specifications and test methods for each test tire are as follows.

[0097] Mounting rim: 16×6.5J

[0098] Tire internal pressure: 210kPa

[0099] Test vehicle: Displacement 2500cc, rear wheel drive

[0100] Tire installat...

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PUM

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Abstract

The present invention provides a tire capable of exhibiting excellent noise performance. The tire has a tread portion (2) whose orientation to be mounted on a vehicle is specified. The main groove (3) provided in the tread portion (2) includes an outer shoulder main groove (5) arranged on the outermost tread end (To) side. The outer shoulder main groove (5) has the smallest groove width among the plurality of main grooves (3). The land portion includes an outer middle land portion (12) adjacent to the inner tread end (Ti) side of the outer shoulder main groove (5). The outer middle land portion (12) includes a middle longitudinal narrow groove (30) extending continuously in the tire circumferential direction at a position closer to the inner tread end side than the center position of the outer middle land portion (12) in the tire axial direction. The inner portion (31) on the inner tread end (Ti) side of the middle longitudinal narrow groove (30). The middle longitudinal narrow groove (30) has a groove width of less than 2% of the tread width (TW) and 3% to 10% of the width of the outer middle land portion (12) in the tire axial direction. The inner portion (31) is a flat land portion without grooves and sipes.

Description

technical field [0001] The present invention relates to a tire with a designated orientation mounted on a vehicle. Background technique [0002] For example, Patent Document 1 below proposes a tire in which a main groove extending continuously in the tire circumferential direction is provided on a tread portion in which a direction to be mounted on a vehicle is specified. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2017-81540 [0004] In the aforementioned tire, since the air column resonance sound caused by the main groove is large, there is room for improvement in terms of noise performance. As a result of various experiments conducted by the inventors, it was concluded that the air column resonance sound of the main groove can be reduced by improving the land portion adjacent to the main groove. Contents of the invention [0005] The present invention has been made in view of the above circumstances, and its main object is to provide a tire capable of ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/03B60C11/1272B60C2011/0365B60C2011/0358
Inventor 冈田崇史冈川洋士久次米智之
Owner SUMITOMO RUBBER IND LTD