Pneumatic Tire

一种充气轮胎、轮胎周向的技术，应用在轮胎零部件、轮胎胎面/胎面花纹、运输和包装等方向，能够解决轮胎胎面部花纹刚性增高、乘车舒适性制动性能降低等问题

Active Publication Date: 2014-09-24
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the initial responsiveness and steering holding force at the time of cornering are improved, the pattern rigidity of the tire tread portion tends to increase.
Therefore, there is a problem that ride comfort and braking performance on wet roads deteriorate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0093] In order to confirm the effect of the present invention, tested with figure 1 A 175 / 65R14 pneumatic tire with a basic pattern based on the specifications in Table 1. The main common specifications and test methods of each tire are as follows.

[0094] Tread ground width TW: 123mm

[0095] The groove depth of the central main groove: 7.5mm

[0096] The groove depth of the main groove of the shoulder: 7.5mm

[0097] Groove depth of each shoulder transverse groove: 5.8mm

[0098] Groove width of each shoulder transverse groove: 3.5mm

[0099] The depth of each sipe in the inner middle land part and the outer middle land part: 3.5mm

[0100] The depth of each closed knife groove: 3.5mm

[0101] The width of each closed slot: 0.6mm

[0102]

[0103] Under the following conditions, each test tire was installed on all wheels of a car with a displacement of 1200cc. In addition, five test drivers drove on a dry asphalt test route, based on the driver’s sensory response to the initial respon...

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Abstract

A pneumatic tire of the invention evenly provides handling stability and riding comfort. The pneumatic tire is designated to an installation direction toward a vehicle. An inboard middle land portion (8) and an outboard middle land portion (7) are respectively formed by ribs only provided with sipes. The sipes of the inboard middle land portion (8) comprises fully open type spies connecting a central main groove (5) and an inboard shoulder main groove (3). The sipes of the outboard middle land portion (7) only comprises outboard sipes (15), one end (15i) of each of which is communicated with an outboard shoulder main groove (4) and the other ends (15e) of which form ends at the outboard middle land portion (7), and inboard sipes (16), one end (16i) of each of which is communicated with the central main groove (5) and the other ends (16e) of which form ends at the outboard middle land portion (7). The number of the inboard sipes (16) is less than the number of the outboard sipes (15).

Description

Technical field [0001] The present invention relates to a pneumatic tire that improves handling stability and riding comfort in a balanced manner. Background technique [0002] In general, in order to improve the handling stability of pneumatic tires, it is necessary to improve the initial responsiveness and steering retention during cornering. [0003] The initial responsiveness when turning is expressed by the amount of time from when the driver turns the steering wheel until the vehicle reaches a steady-state circular (steady-state circular). The shorter the time, the better the initial responsiveness when turning. In order to improve the initial responsiveness of the tire when turning, it is necessary to generate lateral force as early as possible in the early stage of steering. [0004] On the other hand, steering retention is the degree of weight that the driver feels from the steering wheel when the vehicle is traveling straight. In order to improve stability, steering rete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12
CPCB60C11/0302B60C11/03B60C11/12B60C2011/036B60C11/0306B60C11/0304B60C2011/0353B60C2011/0365B60C11/1236B60C2011/1254B60C2011/0372B60C2011/0344B60C2011/1209B60C2011/1227B60C2011/1295
Inventor 井上清治
Owner SUMITOMO RUBBER IND LTD
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