Heavy-Duty Tire RFID Placement for Durability and Ride Comfort
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Solution Overview
Problem
Heavy duty tires incorporating RFID tags face challenges in balancing the impact of the tag on durability and ride comfort.
Innovation Solution
A heavy duty tire design with a carcass, tread, reinforcing layer, and RFID tag placement, utilizing a rubber composition with specific butadiene rubber and filler ratios, along with parallel belt cords and helically wound bands, adhering to a relational expression for optimal durability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an RFID tag is incorporated into the tire, then tire data management capability is improved, but durability is worsened due to tag impact
Solution Approach 1:
A protective layer is introduced as an intermediary between the RFID tag and the tire structure. This protective layer shields the tag from mechanical stress and environmental factors, preventing tag failure while maintaining data management functionality. The protective layer acts as a buffer that absorbs stress before it reaches the tag.
2Strength
If a rigid reinforcing layer is added to improve durability, then strength is improved, but ride comfort is worsened
Solution Approach 1:
The reinforcing layer's material parameters are optimized to achieve a balance between strength and flexibility. By adjusting the cord density, material composition, and structural configuration of the reinforcing layer, the tire maintains high strength for durability while preserving sufficient flexibility for ride comfort. The reinforcing layer is designed with controlled stiffness rather than maximum rigidity.
3Stability of the object's composition
If the RFID tag is positioned near the bead for secure attachment, then tag positioning stability is improved, but durability is worsened due to high stress at the bead
Solution Approach 1:
The RFID tag positioning is moved from the high-stress bead region to the tread region, changing the spatial dimension of tag placement. This dimensional relocation places the tag in an area with lower mechanical stress and more stable environmental conditions, improving both tag longevity and maintaining positioning stability through alternative attachment methods in the tread area.
Data Source
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AI summary
A tire 2 includes a tread 4 formed from a rubber composition containing a rubber component including a butadiene rubber and a filler including carbon black and silica. An RFID tag 64 is positioned between an end FE of a turned-up portion 62 of a carcass ply 58 and a maximum width position PW. An amount CBR of the butadiene rubber is not less than 10 parts by mass. An amount BCB of the carbon black is less than an amount BSi of the silica. The amount CBR, the amount BCB, an inclination angle Ab of a belt cord 78 in a reference belt ply BP, and an inclination angle Aj of a band cord 84 in a reference full band BF satisfy the following relational expression. (CBR/BCB) × (Ab + Aj) ≥ 5.0