Tire Crown Block Sipe Intersection for Traction and Wear
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Solution Overview
Problem
Tires designed for off-road running face a challenge in maintaining traction performance on rocky surfaces while avoiding a decrease in anti-wear performance due to sipes that increase ground contact but reduce pattern rigidity.
Innovation Solution
A tire design featuring a tread portion with a crown region containing crown blocks, where the ground-contacting surface of at least one crown block includes a first, second, and third sipe, all connected at an intersection, which extend in different directions and are configured to maintain block rigidity while enhancing ground contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sipes are provided on ground contacting surfaces of blocks to increase ground contact, then traction performance is improved, but pattern rigidity of blocks decreases and anti-wear performance is impaired
Solution Approach 1:
The sipe configuration divides the ground contacting surface into multiple segments through intersecting sipes, creating multiple small contact areas that collectively improve traction while the intersecting structure maintains overall block rigidity
Solution Approach 2:
The sipes extend in multiple directions (different dimensions) from a single intersection point, creating a three-dimensional sipe pattern that enhances ground contact in various orientations while maintaining block structural integrity
2Reliability
If sipes are provided on ground contacting surfaces of blocks to increase ground contact, then off-road traction performance is improved, but anti-wear performance decreases
Solution Approach 1:
The sipes are strategically positioned and sized to create local deformation zones that improve traction where needed, while the overall block structure and remaining solid portions maintain sufficient rigidity to resist wear during off-road operation
Data Source
AI summary
A tire includes a tread portion including a pair of shoulder main grooves and a crown region defined between the pair of the shoulder main grooves. The crown region includes a plurality of crown blocks. A ground contacting surface of at least one of the crown blocks is provided with a first sipe, a second sipe, and a third sipe. The first sipe, the second sipe, and the third sipe are connected with each other at one intersection.