Tire Tread Blocks with Continuous Side Wall Angle Variation
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Solution Overview
Problem
The existing tire tread designs with inclined rubber blocks for directional tires result in non-uniform wear profiles, leading to premature wear in certain areas and affecting grip performance on wet and dry surfaces.
Innovation Solution
A tire tread design featuring blocks with side walls that have a continuous evolution of angle inclination following a Gaussian curve, optimizing wear distribution and water evacuation, while allowing for adjustable angle ranges to enhance grip on various road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blocks have inclined side walls with different angles depending on distance from tread center, then water evacuation capability is improved, but wear uniformity deteriorates
Solution Approach 1:
The patent applies local quality by varying the angle of inclination of block side walls according to their position in the tread. Blocks at different distances from the tread center have different inclination angles, optimized for their specific location. This allows each local region to have optimal water evacuation capability while maintaining overall wear uniformity across the entire tread pattern.
Solution Approach 2:
The patent changes the geometric parameter of block side wall inclination angles systematically. By adjusting the angle parameter based on position (with maximum angle at tread center and decreasing toward edges), the design optimizes both water evacuation performance and wear distribution characteristics across different tread regions.
2Object-affected harmful factors
If transverse groove sections are enlarged toward tread edges through inclined side walls, then water evacuation is improved, but edge block wear increases
Solution Approach 1:
The patent implements local quality by giving different inclination angles to side walls of blocks at different positions. Edge blocks have smaller inclination angles compared to central blocks, which reduces the enlargement effect at edges and consequently reduces wear in these vulnerable regions while preserving water evacuation capability.
3Object-affected harmful factors
If blocks have inclined side walls for directional tread pattern, then grip capacity on wet surface is improved, but non-uniform wear profile emerges
Solution Approach 1:
The patent systematically varies the inclination angle parameter of block side walls based on their position in the tread pattern. This parameter change strategy maintains the directional grip capability on wet surfaces while distributing wear more uniformly across the tread by reducing excessive inclination angles at edge positions where wear is typically accelerated.
Data Source
Figure 1
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AI summary
The invention relates to a rubber material tire including a tread (1) having a width W and delimited by at least one edge (3). The tread comprises a plurality of blocks (5). Each block is delimited by at least one side wall (7) extending mainly in an axial direction Y towards the edge (3). The side wall (7) has, in said axial direction Y, a length L, with L greater than 35% of the width W of the tread. The side wall also has an angle (a) of tilt in relation to a radial direction (Z). Said tilt angle (a) varies along the axial direction Y, said variation being continuous.