Tire Tread Block Incision Layout for Rolling Noise Reduction
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Solution Overview
Problem
Existing vehicle tires generate significant rolling noise due to positive interference among profile blocks with uniform pitch lengths and orientations, which current noise reduction methods have not adequately addressed.
Innovation Solution
The profile blocks in the tire tread are assigned to different pitches with varying distances to block edges in the circumferential direction, and within these blocks, incisions are positioned differently to disrupt positive interference, thereby altering the frequency spectrum and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If profile blocks are assigned to pitches with uniform pitch lengths and orientations, then the tire structure is simple and easy to manufacture, but positive interference occurs among profile blocks generating significant rolling noise
Solution Approach 1:
The patent applies asymmetry by varying the circumferential positions of incisions within profile blocks of the same pitch length. Instead of uniform positioning, the incisions are deliberately placed at different circumferential distances from block edges, creating asymmetric patterns that disrupt the regularity of profile block interactions and eliminate positive interference noise
Solution Approach 2:
The patent implements local quality by making each profile block within a pitch have unique incision positioning characteristics. Each block's incisions are locally differentiated in their circumferential placement, creating local variations in the tread pattern that prevent synchronized noise generation while maintaining overall pitch structure
2Ease of manufacture
If incisions are positioned uniformly within profile blocks, then the manufacturing process is simplified, but the frequency spectrum is narrow and rolling noise is not effectively reduced
Solution Approach 1:
The patent changes the positional parameters of incisions within profile blocks. Specifically, it varies the circumferential distance parameter from block edges across different blocks, creating a distribution of positional values that broadens the frequency spectrum and improves noise reduction effectiveness
3Stability of the object's composition
If all profile blocks in a row have identical incision distances to block edges, then the tire structure is consistent and easy to produce, but positive interference occurs and rolling noise is not minimized
Solution Approach 1:
The patent maintains overall tread structure consistency through uniform pitch lengths while introducing local quality variations in incision positioning. Each profile block within a pitch has locally differentiated incision distances from block edges, creating unique local patterns that prevent positive interference while preserving global structural stability
Data Source
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AI summary
The invention relates to a vehicle tire with a tread having at least one row of profile blocks (1) with profile blocks (4), each of which is assigned a separate pitch (PL, PM, PM', Ps, Ps') with a pitch length (cPM, cPL, cPS), wherein each profile block (4) is provided with at least one cut (5, 51, 52, 53, 54, 5s, 56), wherein the cuts (5, 51, 52, 5s, 54, 5s, 56) have a distance (aL, aM, as, aM`, as') determined in the circumferential direction from the block edges (4') which are oriented the same with respect to the circumferential direction, related to their geometric center of gravity (S).Within the profile block row (1), profile blocks (4) are provided which belong to different pitches (PL, PM, PM', Ps, Ps') of identical pitch length (cPM, cPL, cPS) and in which the distances (aL, aM, as, aM', as', aM*, aM*') of the incisions (5, 51, 52, 53, 54, 5s, 56) - from profile block (1a) to profile block (1a) - to the block edges (4') which are oriented the same with respect to the circumferential direction differ from one another.