Self-Powered Tire Sound Absorber With Mechanical Inner-Liner Mounting
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Solution Overview
Problem
Existing tire technologies face challenges in achieving precise sound absorption due to issues with adhesives, weight increase from added materials, and durability problems, particularly with sound absorption materials separating over time.
Innovation Solution
A tire design featuring a wall structure with porous sponge bodies and insertion grooves for sound absorbers, combined with conductive wires for self-power generation through frictional electrification, and an electronic unit for efficient sound absorption and energy harvesting, reducing weight and improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If adhesive is used to attach sound absorption material to inner liner, then sound absorption performance is improved, but adhesive ability deteriorates due to hardening and aging
Solution Approach 1:
The patent extracts the adhesive layer from the system by using a band structure that mechanically attaches the sound absorption material to the inner liner without requiring adhesive. The band is vulcanized to the inner liner, creating a permanent mechanical bond that eliminates adhesive aging and hardening problems.
Solution Approach 2:
The band is pre-formed with attachment structures (such as claws or protrusions) that are designed to mechanically interlock with the inner liner before final installation. This preliminary structuring ensures reliable attachment without relying on adhesive properties that degrade over time.
2Reliability
If sealant is used to attach sound absorption material, then sealing performance is improved, but precise control is difficult due to liquid state and high temperature requirements
Solution Approach 1:
The patent replaces the chemical sealing system (sealant) with a mechanical attachment system. The band structure uses physical interlocking mechanisms such as claws, protrusions, or friction-based attachment to secure the sound absorption material, eliminating the need for liquid sealants and high-temperature discharge nozzle maintenance.
3Strength
If pressure is applied to adhesive-attached sound absorption material, then attachment strength is improved, but foam absorbs pressure so pressure is not transmitted to adhesive
Solution Approach 1:
The patent removes the adhesive layer entirely and uses a band structure that attaches the sound absorption material through mechanical means. This eliminates the problem of pressure being absorbed by the foam without reaching the adhesive, as the mechanical attachment structures (claws, protrusions) directly transmit forces without relying on pressure-dependent adhesive bonding.
4Use of energy by moving object
If wires are inserted in entire surface of sound absorption material for self-power generation, then energy harvesting capability is improved, but weight of tire greatly increases
Solution Approach 1:
The patent applies the sound absorption material and wire integration locally rather than across the entire tire surface. The sound absorption material is positioned specifically in noise-prone areas, and wires are integrated only in these localized regions, reducing overall weight while maintaining effective noise reduction and self-power generation capabilities.
Solution Approach 2:
The sound absorption material serves multiple functions: it provides noise reduction and simultaneously acts as a substrate for wire integration for self-power generation. This multi-functionality eliminates the need for separate components, reducing overall weight while achieving both noise control and energy harvesting goals.
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
The tire achieves enhanced sound absorption and self-power generation while minimizing weight and maintaining material stability, offering improved noise reduction and energy harvesting capabilities.
Implementation Method 1
first wires disposed in apertures of the bodies, and the first wires generate electrical energy through frictional electrification with the bodies having a porous sponge structure
Implementation Method 2
a sound absorber spaced apart upward from the inner liner with both ends coupled to the wall structure and blocking sound generated by surfaces of treads and a road surface
Data Source
AI summary
Proposed is a tire with self-generation and sound absorption and, more particularly, is a tire with self-generation and sound absorption that operates an electronic module through self-power generation and has improved sound absorption performance. The tire with self-generation and sound absorption includes: a wall structure formed on a surface of an inner liner of the tire; a sound absorber spaced apart upward from the inner liner with both ends coupled to the wall structure and blocking sound generated by surfaces of treads and a road surface; and an electronic unit disposed on the surface of the inner liner and positioned between the inner liner and the sound absorber.