Pneumatic Tire L-Shaped Sipe Design for Snow Traction and Wear
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Solution Overview
Problem
Conventional pneumatic tires with block patterns face challenges in enhancing both snow performance and wear resistance, particularly in maintaining even wear and durability.
Innovation Solution
The tire features L-shaped sipes with a two-dimensional portion extending in the tire circumferential direction and a three-dimensional portion extending in the tire lateral direction, connected or proximal to each other, which increases edge components and rigidity, improving snow performance and wear resistance by balancing rigidity and suppressing uneven wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a block pattern is employed to increase traction characteristics and improve snow performance, then snow performance is improved, but wear resistance performance deteriorates
Solution Approach 1:
The block pattern is segmented by incorporating sipes (cuts) that divide the blocks into smaller sections. This segmentation increases the number of edges and contact points for snow traction while reducing the overall stress on each block section, thereby improving snow performance without compromising wear resistance.
Solution Approach 2:
The sipes are strategically positioned within specific blocks to create local variations in rigidity and flexibility. This allows certain areas to be more compliant for snow grip while other areas maintain structural integrity for wear resistance, achieving both objectives through localized structural modifications.
2Reliability
If the block pattern is designed to improve snow performance, then edge components are increased, but rigidity balance deteriorates causing uneven wear
Solution Approach 1:
The sipes are designed with asymmetric patterns where the orientation, depth, and spacing vary across different blocks. This asymmetric design creates optimal edge components for snow grip in specific directions while maintaining overall rigidity balance across the tread, preventing uneven wear caused by excessive rigidity in any single direction.
Data Source
AI summary
A pneumatic tire comprises a plurality of blocks arranged on a tire ground contact edge. The plurality of blocks each comprise at least one main sipe that comprises: a two-dimensional sipe portion extending in a tire circumferential direction, and a three-dimensional sipe portion extending in a tire lateral direction that connects to the two-dimensional sipe portion.