Tire Inner Liner Layout for RFID Communication Near Bead Cores

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Solution Overview

Problem

Conventional tires with embedded electronic components, such as RFID tags, face communication performance issues due to the adverse effects of metal bead cores, which can lead to flaws in the electronic component units.

Innovation Solution

A tire design where the electronic component unit is positioned at least 5.0 mm away from the outer end of the bead core in the tire-radial direction, and is securely attached to the inner liner using a thin layer of vulcanizing adhesive, ensuring minimal interference from the metal bead core and maintaining flexibility during tire deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the electronic component unit is embedded near the bead core, then production management and usage history management can be carried out, but communication performance deteriorates due to adverse effects from the metal bead core

Engineering Contradiction:

Improvecommunication performanceVSAvoidadverse effects from metal bead core

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The electronic component unit is extracted from the vicinity of the bead core and repositioned to a location at least 5.0 mm away from the bead core outer end in the tire-radial direction. This spatial extraction eliminates the harmful electromagnetic interference from the metal bead core while preserving the RFID communication functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The inner liner serves as an intermediary layer between the electronic component unit and the bead core. By positioning the electronic component unit on the tire inner cavity side of the inner liner, the inner liner acts as a protective barrier that further isolates the electronic components from the adverse effects of the metal bead core.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the electronic component unit is positioned away from the bead core, then communication performance is maintained, but the component may detach during tire deformation

Engineering Contradiction:

Improvecommunication performanceVSAvoidadhesion to inner liner

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The electronic component unit is pasted to the inner liner in advance during tire manufacturing, before the tire undergoes service deformations. This preliminary bonding ensures that the component unit is securely attached and will maintain its position even when the tire deforms during use.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The adhesive bonding is applied locally at the interface between the electronic component unit and the inner liner. This localized bonding approach ensures strong attachment at the critical interface while allowing the rest of the tire structure to deform naturally without restricting the component unit's position.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12138967B2Tire

Publication Date: 2024.11.12 TOYO TIRE CORP

AI summary

A tire includes: a pair of beads having a bead core and bead filler extending to an outer side in a tire-radial direction of the bead core; a carcass ply extending from one bead to another bead; an inner liner arranged at a tire inner cavity side of the carcass ply; and an electronic component unit pasted to a tire inner cavity side of the inner liner, in which the electronic component unit is arranged at a tire-radial direction position distanced at least 5.0 mm to the outer side in the tire-radial direction from a tire-radial direction outside end of the bead core.