Tire Tread Block Layout for Traction and Side Grip Balance
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Solution Overview
Problem
Existing tires do not adequately enhance traction performance while maintaining side grip, as described in Japanese Laid-Open Patent Publication No. 2019-130929.
Innovation Solution
A tire design featuring a tread portion with lateral and circumferential grooves, forming block groups with specific edge lengths and orientations to optimize ground-contact pressure and grip, including first and second crown blocks with longer lateral and circumferential edges respectively, and recessed blocks to improve traction and side grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tread pattern uses uniform block configuration, then manufacturing is simplified, but both traction and side grip cannot be simultaneously optimized
Solution Approach 1:
The tread pattern is segmented into first and second block groups with different block configurations. While this increases pattern complexity, each segment can be designed using standardized block elements that are relatively simple to manufacture, balancing complexity with performance optimization.
Solution Approach 2:
Different block geometries are applied to different longitudinal positions based on functional requirements. This localized differentiation optimizes grip performance in each region while maintaining reasonable manufacturing complexity through systematic pattern design.
Data Source
Figure 1
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AI summary
A tread portion 2 includes an outer tread end To, an inner tread end Ti, lateral grooves 3, and circumferential grooves 5. Each region between the lateral grooves 3 and between the outer tread end To and the inner tread end Ti forms a block group 10. The block group 10 includes a first block group 11 and a second block group 12. The first block group 11 includes a first crown block 13 whose ground-contact surface includes a first lateral edge 13a and a first circumferential edge 13b. The first lateral edge 13a is formed longer than the first circumferential edge 13b. The second block group 12 includes a second crown block 14 whose ground-contact surface includes a second lateral edge 14a and a second circumferential edge 14b. The second circumferential edge 14b is formed longer than the second lateral edge 14a.