Heavy-Duty Tire Tread Filter Layout for Noise and Rigidity
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Solution Overview
Problem
Heavy duty tires face challenges in maintaining tread rigidity while reducing external noise caused by contact with the road surface, as applying various groove patterns is difficult due to the need for stiffness.
Innovation Solution
A heavy duty tire design featuring a rib structure defined by kerfs, grooves, and filters with specific dimensions and arrangements that act as acoustic low-pass filters, reducing noise while maintaining tread rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If groove patterns are applied to the tread surface, then external noise is reduced, but tread rigidity deteriorates
Solution Approach 1:
The tread surface is segmented into multiple functional elements: ribs for structural support, grooves for noise reduction, and filters for additional acoustic control. This segmentation allows each element to perform its specific function without compromising the overall tread rigidity, as the ribs maintain structural integrity while grooves and filters manage noise
Solution Approach 2:
Different regions of the tread are given different properties: ribs have high rigidity for load bearing, while grooves and filters have acoustic optimization for noise reduction. The filters specifically are designed with particular cross-sectional areas and arrangements to target specific frequency ranges, applying local quality optimization to different parts of the tread structure
2Strength
If the tread structure is simplified to maintain rigidity, then tread rigidity is preserved, but noise reduction capability deteriorates
Solution Approach 1:
The invention merges multiple functions into a unified tread structure: load-bearing ribs, noise-reducing grooves, and acoustic filters work together in an integrated design. The filters are specifically positioned and sized to complement the rib-groove structure, creating a combined system that achieves both rigidity and noise reduction that neither element could achieve alone
Solution Approach 2:
The filters introduce a new dimensional aspect to noise control by varying their cross-sectional areas in specific patterns. This dimensional variation creates acoustic filtering effects at different frequencies, adding a new layer of noise control capability to the traditional rib-groove structure without compromising its structural function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tire design effectively reduces external noise and maintains rigidity, enhancing driving comfort and environmental quietness.
Implementation Method 1
a filter having a larger cross-sectional area than that of the groove and arranged on the groove at predetermined intervals in the circumferential direction of the tread... acting as acoustic low-pass filters, reducing noise
Data Source
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AI summary
Disclosed is a heavy duty tire. The heavy duty tire including a tread contacting a road surface, a rib defined by a kerf formed in an axial direction of the tread and arranged at predetermined intervals in a circumferential direction of the tread, a groove formed in the circumferential direction of the tread and arranged at predetermined intervals in the axial direction of the tread, and a filter having a larger cross-sectional area than that of the groove and arranged on the groove at predetermined intervals in the circumferential direction of the tread, wherein the filter is provided in a quantity of one to three within a contact patch, which is a region where the tread contacts the road surface under a normal internal pressure and a normal load, and the quantity is defined based on a length of contact patch measured in the circumferential direction of the tread.