Vehicle Tyre Sipe Channel Geometry for Tread Block Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pneumatic vehicle tires face a trade-off between maintaining rigidity for dry driving and increasing sipes for better traction on non-dry surfaces, where more sipes enhance adhesion but reduce rigidity, and existing designs struggle to maintain geometry stability during the tire's service life.
Innovation Solution
Incorporating a channel-shaped area within fine incisions, specifically a bead structure that divides the incision into sections, enhances the rigidity of tread block elements and maintains edge geometry, improving handling on both dry and wet surfaces by ensuring effective form fit and stability of fine incision walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of sipes is increased to improve adhesion on slippery roads, then adhesion on wet or snow-covered roads is improved, but the rigidity of tread blocks decreases
Solution Approach 1:
The tread block is segmented by introducing sipes (fine incisions) that divide the solid rubber into multiple sections. These sipes create additional edges that bite into slippery surfaces, improving adhesion while the segmented structure allows controlled flexibility without compromising overall block integrity
Solution Approach 2:
The sipes are strategically positioned and dimensioned to provide local flexibility and adhesion enhancement at specific contact points, while the bulk of the tread block maintains its rigidity. The fine incisions create localized edges for grip without affecting the global structural properties of the tread block
2Reliability
If sipes are added to increase edges for better adhesion, then adhesion on non-dry surfaces is improved, but the geometry of the fine incision opening changes during service life
Solution Approach 1:
The sipes are pre-formed with specific geometries and dimensions during tire manufacturing to ensure they maintain their functional characteristics throughout service life. The preliminary design accounts for wear patterns to preserve the incision opening geometry
Solution Approach 2:
The sipes are designed with specific dimensional parameters (depth, width, length, orientation) that are optimized to maintain functional effectiveness. These parameters are controlled during manufacturing to ensure stability of the fine incision opening geometry throughout the tire's service life
Data Source
Figure 1
Figure 2~3
Figure 4a~5
AI summary
The invention relates to a vehicle tyre having a tread with a contact surface, wherein the tread has rows of shoulder profile block elements running from a tyre crown to tyre shoulders, wherein the rows of shoulder profile block elements are separated from a central tread region having one or more rows of central profile block elements by circumferential grooves running in the circumferential direction, wherein, in the rows of shoulder profile block elements, individual shoulder profile block elements are separated from one another by transverse grooves, and wherein, in the row/s of central profile block elements, individual central profile block elements are separated from one another by transverse grooves, wherein at least one profile block element of all the shoulder profile block elements and the central profile block elements has at least one sipe, wherein the sipe has a total extension length LGES running parallel to the contact surface, characterised in that the sipe has a channel-shaped region in the form of a corrugation and with a channel length LR running parallel to the contact surface, wherein the channel-length LR corresponds to 20% to 100% of the total extension length LGES of the sipe.