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pneumatic tire

A technology of pneumatic tires and tires, applied in the direction of tire parts, tire tread/tread pattern, transportation and packaging, etc.

Active Publication Date: 2017-10-13
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 pneumatic tire cited in Document 1, further improvements in handling stability and wet performance are required.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0075] Based on the specifications in Table 1, prototypes with figure 1 The size of the basic pattern is 195 / 65R15 pneumatic tires. As a comparative example, the following tires were trial-manufactured, namely: Figure 6 As shown, the first ground contact end and the second ground contact end of the first shoulder lateral groove are respectively arranged at the same positions in the tire circumferential direction as the first ground contact end and the second ground contact end of the second shoulder lateral groove. Location. The handling stability, wear resistance, wet road performance, and noise performance of each test tire were tested. The general specifications and test methods of each test tire are as follows.

[0076] Mounting rim: 15×6J

[0077] Tire internal pressure: 230kPa

[0078]

[0079] Using the following test vehicles, the driver's senses were used to evaluate the handling stability when driving on an asphalt loop test course. The results are indicated...

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Abstract

The invention provides a pneumatic tire capable of improving noise performance while maintaining handling stability and wet road performance. The first middle land portion (11) and the second middle land portion (12) of the pneumatic tire are rib-shaped. The middle sipe (13) includes a substantially arc-shaped first middle sipe (14) and a second middle sipe (15). A plurality of first shoulder lateral grooves (33) and second shoulder lateral grooves (34) are respectively provided on the first shoulder land portion (31) and the second shoulder land portion (32). Each of the first shoulder lateral grooves and each of the second shoulder lateral grooves has a first ground contact end portion (35) and a second ground contact end portion (36). Each first ground contact end portion (35A) is disposed at a position different from each first ground contact end portion (35B) of the second shoulder lateral groove. Each second ground contact end portion (36A) of the first shoulder lateral groove is disposed at a position different from each second ground contact end portion (36B) of the second shoulder lateral groove.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of improving noise performance while maintaining handling stability and wet performance. Background technique [0002] Patent Document 1 below proposes a tire in which the groove width and position of main grooves extending continuously in the tire circumferential direction and the shape of lug grooves forming ends in land portions are improved. Such tires are expected to have the effect of reducing the pumping sound caused by the groove, thereby improving the noise performance. [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2012-162194 [0004] However, in the pneumatic tire of Cited Document 1, further improvement is required for handling stability and wet performance. Contents of the invention [0005] A main object of the present invention is to provide a pneumatic tire which maintains steering stability and wet performance and improves noise performance based on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/04B60C11/13B60C11/01
Inventor 林浩二
Owner SUMITOMO RUBBER IND LTD
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