Embedded Tire Electronics Protection Through Rubber Viscoelasticity
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Solution Overview
Problem
Pneumatic tires with embedded electronic components, such as RFID, face damage and deformation issues during high-speed and severe handling, leading to compromised reading performance due to increased internal temperature and impact.
Innovation Solution
The tire design incorporates specific rubber members with controlled tan δ values at 50°C and 150°C to mitigate peripheral impact, ensuring the electronic component's durability and maintaining reading performance by embedding the component between the clinch and bead apex, with the clinch and bead apex rubber compositions optimized to minimize heat-induced deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic component is embedded inside the unvulcanized tire (e.g., in the bead portion) and integrated by vulcanization adhesion, then the electronic component is secured against falling-off, but the electronic component is damaged and deformed under high speed and severe handling conditions
Solution Approach 1:
The patent changes the physical-chemical parameters of the rubber members by controlling tan δ values at different temperatures. Specifically, it requires that (tan δ1 at 50°C + tan δ2 at 50°C) - (tan δ1 at 150°C + tan δ2 at 150°C) ≤ 0.08, where tan δ1 and tan δ2 are the loss factors of the first and second rubber members respectively. This parameter control ensures the rubber members have appropriate elasticity at operating temperature while reducing heat-induced deformation, protecting the embedded electronic component from damage during high-speed and severe handling conditions.
Solution Approach 2:
The patent applies different rubber compositions with specific tan δ characteristics to different locations around the electronic component. The first rubber member (outer side) and second rubber member (inner side) are selectively designed with controlled tan δ values at 50°C and 150°C, creating local quality variations that optimize both attachment reliability and protection against thermal deformation in their respective positions.
2Object-affected harmful factors
If the electronic component is adhered to the surface of the tire after vulcanization, then the electronic component is not damaged during manufacturing, but the electronic component easily falls-off while traveling on the road surface
Solution Approach 1:
The patent merges the electronic component embedding process with the tire vulcanization process. By embedding the electronic component inside the unvulcanized tire and integrating it through vulcanization adhesion, the component becomes permanently bonded to the tire structure, preventing falling-off during travel while the vulcanization process itself provides protection against damage.
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
This design effectively suppresses damage and deformation of the electronic component, ensuring sustained reading performance even under high-speed and severe handling conditions by diffusing heat-generated impact and maintaining reliable communication.
Implementation Method 1
tan δ (1)50° C. and tan δ (1)150° C. of the first rubber member having the largest E*(50° C.) at 50° C. among rubber members for a tire located outward in the tire axial direction from the position where the electronic component is provided, and tan δ (2)50° C. and tan δ (2)150° C. at 150° C. of the second rubber member having the largest E*(50° C.) at 50° C. among rubber members for a tire located inward in the tire axial direction from the position where the electronic component is provided
Data Source
AI summary
Provided is a tire structure technology with which sufficient reading performance can be maintained even when a tire having an electronic component provided therein is caused to drive under high speed and severe handling. A pneumatic tire in which an electronic component is provided farther outward in a tire axial direction than a carcass, and in which the tan δ(1)50° C. and tan δ(1)150° C. of a first rubber member, and the tan δ(2)50° C. and tan δ(2)150° C. of a second rubber member, satisfy the following formula, where the first rubber member is a tire rubber member that has the greatest E* at 50° C. among tire rubber members positioned outward from the electronic component in the tire axial direction, and the second rubber member is a tire rubber member that has the greatest E* at 50° C. among tire rubber members positioned inward from the electronic component in the tire axial direction.(tan δ(1)50° C.+tan δ(2)50° C.)−(tan δ(1)150° C.+tan δ(2)150° C.)≤0.08