Heavy Load Pneumatic Tire Silica Insert Design
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Solution Overview
Problem
Heavy load vehicle tires experience separations in the belt structure and early wear in the shoulder region, leading to reduced integrity and increased operating temperatures, which can result in premature tire failure and decreased kilometers traveled.
Innovation Solution
Incorporating elastomeric inserts made with a diene rubber and almost exclusively silica between the belt structure and tread band, which reduces operating temperatures and enhances structural integrity and fatigue resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tread width is increased to improve reliability and comfort, then the structural integrity deteriorates due to separations in the belt structure
Solution Approach 1:
The invention introduces elastomeric inserts as separate components positioned at the axial ends of the belt structure. These inserts segment the stress distribution and prevent separations between the belt structure and tread band, thereby maintaining structural integrity while allowing wider tread designs for improved reliability and comfort.
Solution Approach 2:
The elastomeric inserts act as intermediary elements between the belt structure and the tread band. They mediate the stress transfer and prevent direct separation, thus preserving the structural integrity of the tire even when the tread width is increased for better reliability.
2Temperature
If silica is used as reinforcing filler in the insert to reduce operating temperature, then the manufacturing precision may be affected by dispersion difficulties
Solution Approach 1:
The invention specifies precise compositional parameters for the elastomeric inserts, including the type of diene rubber and the amount of silica reinforcing filler. By controlling these parameters and using proper mixing procedures, the patent achieves both reduced operating temperature and maintained manufacturing precision through homogeneous compound distribution.
Data Source
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AI summary
A tyre for heavy load vehicles comprising an insert interposed between a belt structure and a tread band, at least at each end of the belt structure, and made by vulcanising an elastomeric composition comprising a diene rubber and at least one reinforcing filler, wherein the reinforcing filler comprises almost exclusively silica.