Tyre Tread Webs for Handling and Drainage
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Solution Overview
Problem
Pneumatic vehicle tires face a conflict between achieving good handling properties on dry roads and maintaining effective aquaplaning and snow traction, as a large contact area with few grooves enhances handling but compromises water drainage and wet grip, while a high number of grooves improves wet performance but worsens dry-road handling.
Innovation Solution
The introduction of webs between transverse grooves that connect tread blocks from adjacent rows, with web flanks as continuations of groove flanks, stabilizes the tread block rows and enhances water drainage, providing additional gripping edges for improved snow traction and addressing the conflict between handling and aquaplaning properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the number of grooves is reduced to increase contact area, then handling properties on dry roads are improved, but water drainage capacity and wet grip properties deteriorate
Solution Approach 1:
The circumferential groove is segmented into multiple sections along the tread width, with each section positioned between adjacent tread blocks of opposite rows. This segmentation allows water to be channeled through multiple discrete paths simultaneously, maintaining effective water drainage capacity while preserving larger continuous contact areas between groove sections for improved dry road handling.
Solution Approach 2:
Different regions of the tread are assigned different groove configurations tailored to local requirements. The circumferential groove sections are strategically positioned in specific local areas between tread blocks where water accumulation is most critical, allowing optimized water drainage in those zones while maintaining larger contact areas in other regions for handling performance.
2Object-affected harmful factors
If the number of grooves is increased to improve water drainage, then aquaplaning properties are improved, but handling properties on dry roads deteriorate
Solution Approach 1:
Rather than using fewer large grooves or more numerous small grooves uniformly distributed, the solution segments the circumferential groove into specific sections positioned strategically between tread blocks. This creates an optimized middle ground where water drainage capability is enhanced through multiple channels while the spaces between these segmented sections preserve sufficient contact area for handling.
Solution Approach 2:
The groove configuration extends into the width dimension of the tread by creating multiple circumferential groove sections across the tread width rather than relying solely on groove depth or length. This dimensional approach allows water drainage function to be distributed across multiple locations simultaneously, improving aquaplaning resistance without proportionally increasing the total groove area that would compromise handling.
3Object-affected harmful factors
If tread blocks are separated by grooves to improve water drainage, then wet grip properties are improved, but structural stability of the tread deteriorates
Solution Approach 1:
The circumferential groove is divided into multiple sections rather than forming continuous deep grooves across the entire tread width. This segmentation creates shorter, shallower groove sections that provide effective water drainage pathways for improved wet grip, while the remaining portions of the tread structure maintain continuity and structural stability to prevent excessive tread block row separation.
Data Source
Figure 1~2
AI summary
The invention relates to a pneumatic vehicle tyre of radial type of construction, having a tread with at least two profile block rows (3, 3') which are delimited at the outside by in each case one circumferential channel (1) and which are separated from one another by a circumferential channel (4), wherein the profile block rows (3, 3') are divided into profile blocks (6) by transverse channels (8) which run substantially parallel to one another and which extend through the profile block rows (3, 3'), wherein the transverse channels (8) which run in one profile block row (3) run substantially parallel to the transverse channels (8) which run in the other profile block row (3'), and the profile block rows (3, 3') on the tread surface are delimited in each case by block edges (9, 10) running parallel to one another and have channel flanks (11, 12) running substantially in a radial direction, wherein in each case one transverse channel (8) from one profile block row (3) opens into the circumferential channel (4), which runs between the profile block rows (3, 3'), with an offset (a1) of 5.0 mm to 10.0 mm in the circumferential direction in relation to a transverse channel (8) from the other profile block row (3'). The circumferential channel (4) which runs between the profile block rows (3, 3') is, in each case between the transverse channels (8) which open into said circumferential channel (4) with an offset with respect one another, interrupted by a web (5) which connects a profile block (6) from one profile block row (3) to a profile block (6) from the other profile block row (3').