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Heavy duty tire

一种轮胎、胎体的技术，应用在特殊轮胎、轮胎零部件、胎沿等方向，能够解决未启示减少滚动阻力等问题，达到能量损耗降低、防止耐久性劣化、减少滚动阻力的效果

Active Publication Date: 2007-07-04
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not shed any light on reducing rolling resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13 and comparative example 1～5

[0044] A truck tire (size: 11R22.5 14PR) having the basic structure shown in FIG. 1 was manufactured according to the specifications shown in Table 1, and its rolling resistance and durability were measured by the method described below. The tire specifications not described in the table are the same for all tires. The radial distance X of the tire from the axially outer end 7e of the belt layer 7 to the radially outer surface of the bead core 5 is 180 mm.

[0045]

[0046] The tire was run using a rolling resistance meter under the condition of a rim of 7.50×22.5, an internal pressure of 700 kPa, a speed of 80 km / h, and a tire load of 24.52 kN, and the rolling resistance was measured. The result is shown with the result of Comparative Example 1 as an index of 100. The smaller the value, the better the scrolling characteristics.

[0047]

[0048]An incision with a length of 5 mm and a depth of 3 mm is formed at the midpoint position M in the sidewall part, and the drum of the dr...

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PUM

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Abstract

A heavy duty tire with decreased rolling resistance without impairing durability, comprising carcass 6 , belt layer 7 disposed radially outward of the carcass in tread portion 2 , and sidewall rubber 3 g disposed axially outward of the carcass in sidewall portion 3 and extending in the radial direction of the tire, wherein the sidewall rubber includes an axially inner rubber portion 10 disposed axially outward of the carcass and an axially outer rubber portion 11 disposed axially outward of the inner rubber portion to form the tire outer surface, the inner rubber portion 10 has a lower loss tangent 'tan delta' than the outer rubber portion 11 by a difference of 0.010 to 0.035, and the inner rubber portion 10 has a lower complex elastic modulus than the outer rubber portion 11 by a difference of 0.5 to 1.4 MPa.

Description

Technical field [0001] The present invention relates to a heavy-duty tire, and more specifically, to a heavy-duty tire having an improved sidewall to reduce tire rolling resistance without compromising durability. Background technique [0002] In recent years, with global environmental issues, there is a great need to reduce vehicle fuel costs, so various attempts have been made to reduce tire rolling resistance. Because of the high fuel consumption, the reduction in rolling resistance is particularly effective for heavy-duty tires used in vehicles such as trucks or buses. [0003] In order to reduce the rolling resistance of truck tires, traditional attempts have been made, for example, to use rubber materials with low energy loss in the tire tread or to reduce the strain generated when the tire is deformed under load. However, in the former method, there is a concern about reducing handling stability and wear resistance. In the case of the latter method, it is easy to reduce dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/02
CPCB60C13/04B60C1/0025B60C2013/006B60C15/06B60C2013/045Y02T10/86Y10T152/10819B60C9/18B60C11/01B60C13/00
Inventor 沼田一起
Owner SUMITOMO RUBBER IND LTD
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