Expandable Noise Baffle for Lightweight Vehicle Pillar Cavities
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Solution Overview
Problem
Existing noise reduction solutions for articles of manufacture, such as automotive vehicles, face challenges in balancing lightweight design with effective noise reduction while also considering factors like cost, ease of assembly, and compatibility, while maintaining structural integrity and sound absorption capabilities.
Innovation Solution
A noise reduction member comprising a carrier member with walls and an expandable material that expands to fill cavities, providing sound absorption and structural reinforcement, utilizing a fastener system for attachment and employing heat-activated foams for efficient noise reduction and expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If expandable materials are used for noise reduction, then sound absorption capability is improved, but weight increases
Solution Approach 1:
The expandable material is applied in a compressed, low-volume state before expansion. The material is pre-positioned in a compact form factor that minimizes weight during handling and installation, then expanded in-situ to achieve the desired noise reduction volume and acoustic performance
Solution Approach 2:
The material undergoes a parameter change from compressed to expanded state through activation (thermal, chemical, or mechanical). This transformation allows the same material to provide different volume and density characteristics - lightweight in compressed form for installation, then expanded to provide effective noise reduction
2Object-affected harmful factors
If expandable materials are used for noise reduction, then sound absorption capability is improved, but device complexity increases
Solution Approach 1:
The expandable material integrates multiple functions into a single component: it provides structural support, sound absorption, and cavity filling simultaneously. The material combines the functions of traditional separate components (structural members, acoustic insulation, and sealing elements) into one multi-functional expandable element
Solution Approach 2:
The expandable material performs self-installation and self-configuration through its expansion mechanism. Once activated, the material automatically expands to fill the available cavity space, conforming to the geometry of the installation area without requiring complex positioning mechanisms or additional assembly steps
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 solution effectively reduces noise and provides structural reinforcement by expanding to fill cavities, inhibiting sound and debris passage, while maintaining structural integrity and ease of assembly, suitable for various applications including automotive vehicles.
Implementation Method 1
The present invention is directed to a noise reduction member... providing noise reduction (e.g., baffling, sound absorption, combinations thereof or the like)
Data Source
AI summary
There is disclosed a noise reduction member. Preferably, the noise reduction member is employed for sealing or baffling within a pillar or other structure of an automotive vehicle, although not required.