Pneumatic tire

A pneumatic tire, tire circumferential technology, applied in tire parts, tire tread/tread pattern, vehicle parts, etc., can solve the lack of straightness of the steering wheel, difficult to fully improve dry performance, and may not be able to fully obtain wet performance. and other problems to achieve the effect of improving wetland performance, improving wetland performance, and ensuring rigidity

Active Publication Date: 2016-02-24
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, according to the structure of Patent Document 1, since there is a land portion on which no lug grooves are formed, it is not always possible to obtain sufficient wet performance.
In addition, although there are fewer lug grooves, the rigidity of the land portion can be ensured, but the feeling of driving and the linearity of the steering wheel (the linearity of the vehicle behavior relative to the steering angle when the steering wheel is operated) due to the lug grooves There are deficiencies, so it is difficult to sufficiently improve dry performance, especially handling stability on dry roads (dry handling stability)

Method used

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  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] Make conventional example 1, comparative example 1~2, and embodiment 1~9 altogether 12 kinds of pneumatic tires, its tire size is 215 / 45R1787W, has figure 1 The cross-sectional shape is illustrated, and the tread pattern, the presence or absence of circumferential thin grooves, the shape of the shoulder lug groove, the circumferential land portion (the first circumferential land portion, the second circumferential ring on the inside of the vehicle) are respectively set as shown in Table 1. land, the second circumferential land on the vehicle outside) and the groove area ratio of the shoulder land (vehicle inside, vehicle outside), the presence or absence of sipes, the oblique direction of the lug groove, and the oblique direction relative to the lug groove The direction of inclination of the shoulder grooves.

[0047] In addition, the pneumatic tire of Conventional Example 1 has image 3 A tire with the illustrated tread pattern. Specifically, the tread has four main ...

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Abstract

Provided is a pneumatic tire (T) which makes it possible to improve noise performance while having both steering stability performance on dry road surfaces and driving performance on wet road surfaces. In this pneumatic tire (T), the tread surface (10) has at least four main grooves (11) extending in the tire circumferential direction; these main grooves (11) divide circumferential land portions (12) and shoulder land portions (13) and indicate the mounting direction relative to the vehicle. Multiple lug grooves (14) extending in the tire width direction are formed at intervals in the tire circumference direction on each of the multiple circumferential land portions (12). The lug grooves (14) communicate with the main grooves (11) on the inner side of the vehicle, but on the outer side of the vehicle, said lug grooves (14) terminate within the circumferential land portions (12) without communicating with the main groove (11).

Description

technical field [0001] The present invention relates to a pneumatic tire having at least four main grooves extending in the circumferential direction of the tire on the tread, and more specifically, to a pneumatic tire having both handling stability on dry roads and driving performance on wet roads. , Pneumatic tires that can also improve noise performance. Background technique [0002] In recent years, with the development of road construction and the improvement of vehicle performance, it is possible for pneumatic tires to have both the driving performance on dry roads (dry performance) and the driving performance on wet roads (wet performance) when driving at high speeds. , There is also an increasing demand for improved noise performance. [0003] In order to improve wet performance, it is common to form lugs or sipes extending in the tire width direction on the tire tread in addition to the main grooves extending in the tire circumferential direction to ensure drainage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/04B60C11/03B60C11/12
CPCB60C11/0306B60C11/0304B60C2011/0388B60C2011/1209B60C2011/0383B60C2011/0348B60C2011/0381B60C2011/0393B60C2011/0351B60C2011/0341B60C11/12B60C11/0302B60C11/0327
Inventor 小石川佳史
Owner THE YOKOHAMA RUBBER CO LTD
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