Pneumatic Tire Transponder Embedding Rubber Modulus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pneumatic tires with embedded RFID transponders face durability issues due to brittleness in low temperatures, radio wave interference from metal components, and stress concentration during deformation, leading to degraded communication performance and durability.
Innovation Solution
A pneumatic tire design with a transponder embedded on the outer side of the carcass layer, using rubber members with specific storage modulus ratios and a coating layer to maintain rigidity, suppress stress concentration, and ensure communication performance across temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the transponder is embedded in the tire, then communication performance may be improved for tire identification, but durability of the transponder is degraded due to brittleness in low temperature environments
Solution Approach 1:
The patent applies local quality by using different rubber compositions for the inner and outer rubber members surrounding the transponder. The outer rubber member has a higher proportion of polybutadiene rubber (10-40 parts by weight) compared to the inner rubber member (5-20 parts by weight), creating localized differences in low-temperature flexibility to protect the transponder from brittle failure while maintaining communication performance.
Solution Approach 2:
The patent uses composite rubber materials with specific proportions of polybutadiene rubber, styrene-butadiene rubber, and other components in the inner and outer rubber members. These composite materials provide both the flexibility needed for low-temperature durability and the structural integrity required for transponder protection, resolving the contradiction between communication performance and durability.
2Reliability
If the transponder is disposed on the inner side of the carcass layer, then structural protection is improved, but communication performance is degraded due to radio wave blocking by metal members
Solution Approach 1:
The patent introduces an outer rubber member as an intermediary layer between the transponder and the external environment. This outer rubber member has specific compositional characteristics that balance structural protection with radio wave permeability, allowing the transponder to be positioned on the inner side of the carcass layer for structural protection while maintaining communication performance through the intermediary's favorable material properties.
3Loss of information
If rubber members around the transponder have high responsiveness to tire deformation, then communication performance is maintained during deformation, but stress concentration occurs leading to transponder damage
Solution Approach 1:
The patent applies local quality by creating different rubber compositions for inner and outer members. The outer rubber member has higher polybutadiene content providing flexibility and stress distribution, while the inner rubber member has different composition providing structural support. This localized differentiation allows the structure to maintain communication performance during deformation while distributing stress to protect the transponder.
4Loss of energy
If the tire generates heat during high speed traveling, then energy dissipation is improved, but durability is degraded when heat softens rubber members around the transponder
Solution Approach 1:
The patent uses composite rubber materials with specific proportions of polybutadiene rubber (10-40 parts by weight in outer member), styrene-butadiene rubber (60-80 parts by weight in outer member), and other components. These composite materials are designed to maintain structural integrity at elevated temperatures while allowing controlled heat generation for energy dissipation, resolving the contradiction between heat management and durability.
Data Source
AI summary
A pneumatic tire is provided. A transponder is embedded in an outer side of a carcass layer in a tire width direction, a rubber member having a largest storage modulus at 20° C. of rubber members located on an outer side of the transponder in the tire width direction has a storage modulus at 0° C. E′out(0° C.) and a storage modulus at −20° C. E′out(−20° C.) that satisfy a relationship 0.50≤E′out(0° C.)/E′out(−20° C.)≤0.95, and a rubber member having a largest 20° C. storage modulus of rubber members located on an inner side of the transponder in the tire width direction has a storage modulus at 0° C. E′in(0° C.) and a storage modulus at −20° C. E′in(−20° C.) that satisfy a relationship 0.50≤E′in(0° C.)/E′in(−20° C.)≤0.95.