Runflat Tire Sidewall Transponder Placement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tires suitable for running flat face challenges in integrating electronic components like radiofrequency transponders due to mechanical stresses and communication disruptions, especially when the tire is in a flat mode, which affects their performance and lifespan.
Innovation Solution
The tire design incorporates a radiofrequency transponder placed axially inside the sidewall, radially more than 55% of the tire section height, between the outer rubber layer and the carcass reinforcement, with a primary antenna inductively coupled to the radiating antenna, minimizing mechanical stress and enhancing communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic component is placed in the sidewall of the tire, then the tire can be identified and monitored during manufacture, storage and use, but the electronic component is subjected to high mechanical stresses during flat running which reduces its lifespan
Solution Approach 1:
The patent applies local quality by placing the electronic component in a specific localized zone within the sidewall structure - specifically in the upper portion of the sidewall insert where mechanical stresses are significantly reduced during flat running. This selective positioning ensures that the electronic component experiences lower stress conditions while still being integrated into the tire structure, thereby extending its lifespan without compromising identification and monitoring functionality.
Solution Approach 2:
The patent utilizes the radial dimension of the tire structure by positioning the electronic component at a specific radial distance from the tire center (between 40% and 60% of the radial distance from the center to the outer surface). This dimensional positioning places the component in a stress-minimized zone within the sidewall, effectively using spatial distribution to resolve the contradiction between functionality and durability.
2Loss of information
If the electronic component is placed close to the outer surface of the sidewall, then radiofrequency communication quality is improved, but the component is exposed to higher mechanical stresses and wear
Solution Approach 1:
The patent applies local quality by identifying and utilizing a specific zone within the sidewall structure that offers both adequate radiofrequency communication and reduced mechanical stress. The electronic component is positioned in the upper portion of the sidewall insert, which provides a local environment with lower stress concentrations while maintaining sufficient proximity to the outer surface for effective communication.
Solution Approach 2:
The patent resolves this contradiction by moving the electronic component to a different radial position within the sidewall thickness rather than placing it at the extreme outer surface. By positioning it at 40-60% of the radial distance from the center, the component achieves an optimal balance between communication quality and mechanical protection through dimensional optimization.
3Object-affected harmful factors
If the electronic component is placed in the lower zone of the sidewall, then it is better protected from wear, but radiofrequency communication is disrupted by the metallic wheel
Solution Approach 1:
The patent applies local quality by selecting a specific zone within the sidewall structure that avoids the metallic interference zone near the wheel while still providing adequate wear protection. The upper portion of the sidewall insert is identified as an optimal local region that balances both requirements - sufficient distance from the metallic wheel for communication and adequate embedding for protection.
Solution Approach 2:
The patent resolves this contradiction by utilizing the radial dimension to position the electronic component at an optimal height within the sidewall. By placing it at 40-60% of the radial distance from the center, the component achieves sufficient elevation to avoid metallic wheel interference while maintaining adequate embedding depth for protection, effectively using vertical positioning to balance communication and protection requirements.
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 placement ensures low mechanical stress on the electronic component, improves radiofrequency communication, and extends its lifespan by reducing wear and tear, while maintaining the tire's structural integrity and performance in both flat and inflated modes.
Implementation Method 1
with a primary antenna inductively coupled to the radiating antenna
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A tyre suitable for running flat, comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in each bead and a sidewall insert arranged in each of the two sidewalls, axially inwards relative to the carcass reinforcement, such that it is provided with an electronic unit comprising at least one radiofrequency transponder and such that the electronic unit is positioned radially in an area representing more than 55% of the cross-sectional height of the tyre.