Tire Tread Block Layout for Winter Grip and Handling
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Solution Overview
Problem
Existing tire treads struggle to provide optimal grip and handling on snow, ice, and bare roads, particularly in winter conditions, due to limitations in the design of tread blocks and grooves.
Innovation Solution
A tread block arrangement with smaller tread blocks and supportive structures, such as larger and smaller blocks neighboring each other and grooves with bottom protrusions, enhances grip and traction by increasing the number of edges and improving handling through supportive interactions between blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the number of tread blocks is increased to improve grip and traction, then the number of edges increases improving grip, but the tread blocks become less supported leading to worse handling
Solution Approach 1:
The tread is segmented into multiple small tread blocks arranged in pitches, increasing the number of edges for better grip. The segmentation is organized into distinct regions (first region with 4+ blocks, second region with 2-3 blocks) to balance grip and handling requirements
Solution Approach 2:
Different regions of the tread have different block configurations optimized for their specific functions. The first region has more blocks for grip, while the second region has fewer larger blocks for stability. The central third and lateral thirds have different block arrangements to optimize local performance
2Force
If smaller tread blocks are used to increase the number of edges, then grip improves, but the structural support between blocks decreases worsening handling
Solution Approach 1:
The tread blocks are arranged in different density regions. The first region has higher block density (4 or more blocks) for grip, while the second region has lower density (2-3 blocks) with larger blocks providing structural support. This local variation in block size and spacing resolves the contradiction between grip and structural strength
Solution Approach 2:
The tread is divided into functional segments (first region, second region, central third, lateral thirds) with different segmentation densities. This allows small blocks where grip is prioritized and larger blocks where structural support is needed
3Object-affected harmful factors
If more grooves are added to guide water and slush away, then water evacuation improves, but the number of tread blocks decreases reducing grip edges
Solution Approach 1:
The groove system is segmented into main grooves and pitch grooves that work together. Main grooves provide major water evacuation paths, while pitch grooves between blocks provide additional drainage and siping effects, allowing effective water removal without excessive block reduction
Solution Approach 2:
Different groove configurations are applied in different regions. The groove pattern is optimized locally to balance water evacuation needs with grip requirements in each specific area of the tread
Data Source
AI summary
A tread block arrangement for a tire or for a tread band includes tread blocks defining a first and a second boundary and a central line therein between, such that a first half is arranged on a first side of the central line. The first half includes a first primary pitch and a first secondary pitch, both extending in an inclined manner from the first boundary towards the central line. Both the first primary pitch and the first secondary pitch have at least four tread blocks arranged on a first region of the first half and separated from each other by grooves. A width of the first region is at most 80% of a width of the first half.