Multifunctional Motor Vehicle Lining with Acoustic Resonator and Fluid Chamber
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Solution Overview
Problem
Passenger cell lining components in motor vehicles face issues with temperature fluctuations due to solar radiation, unwanted noise reflection, and limited design freedom due to conventional ventilation and heating solutions.
Innovation Solution
A multifunctional lining component incorporating an open acoustic resonator for sound absorption and a fluid chamber for temperature control, integrated with air ducts for ventilation, produced using additive manufacturing for a compact and durable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If closed surfaces of lining components are used, then structural integrity and design simplicity are improved, but sound reflection increases causing unfavorable internal noise
Solution Approach 1:
The patent applies porous acoustic resonators with specific pore structures to absorb sound waves. The resonators contain cavities and channels that allow sound energy to be dissipated through friction and viscous effects, converting acoustic energy into thermal energy. This porous structure enables the lining component to maintain structural integrity while effectively reducing sound reflection and internal noise.
2Ease of operation
If conventional ventilation openings with grilles are arranged on the instrument panel, then air flow control is improved, but geometric design freedom is greatly restricted
Solution Approach 1:
The patent merges the ventilation function with the acoustic resonator structure. The resonators themselves serve as ventilation elements, with their porous walls allowing air passage while maintaining structural continuity. This integration eliminates the need for separate ventilation openings and grilles, thereby preserving geometric design freedom while achieving effective air flow control and sound absorption.
Solution Approach 2:
The acoustic resonators perform multiple functions simultaneously: they absorb sound, enable ventilation, and maintain structural integrity. This multi-functionality allows the lining component to achieve air flow control without compromising geometric design freedom, as the same structural elements serve both acoustic and ventilation purposes.
3Temperature
If large-area radiators are added to components exposed to solar radiation, then temperature control is improved, but device complexity and installation space requirements increase
Solution Approach 1:
The patent combines the thermal management function with the acoustic resonator structure. The resonators are designed with fluid channels integrated into their porous walls, allowing temperature-control medium to flow through them. This integration enables the same component to perform both sound absorption and thermal management, eliminating the need for separate large-area radiators and reducing overall device complexity and installation space requirements.
Solution Approach 2:
The acoustic resonators serve dual purposes: acoustic damping and temperature control. By integrating fluid channels into the resonator structure, the component can regulate temperature of exposed surfaces while maintaining its sound absorption function. This multi-functionality reduces device complexity and installation space compared to conventional solutions requiring separate thermal management systems.
4Adaptability or versatility
If multiple separate lining components are arranged according to their respective functions, then functional specialization is improved, but installation space and device complexity increase
Solution Approach 1:
The patent merges multiple functional elements into a single integrated lining component. The acoustic resonators with integrated fluid channels and ventilation pathways combine sound absorption, thermal management, and ventilation functions in one structure. This integration reduces the number of separate components required, thereby decreasing installation space and overall device complexity while maintaining functional versatility.
Solution Approach 2:
The lining component achieves multi-functionality by incorporating acoustic resonators that simultaneously provide sound absorption, ventilation, and thermal management. This universal design allows a single component to perform multiple functions that would traditionally require separate specialized components, thereby reducing installation space and device complexity while maintaining functional adaptability.
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 temperature peaks, enhancing passenger comfort by absorbing undesired sound frequencies and providing targeted temperature control, while allowing for flexible design and reduced installation space.
Implementation Method 1
The resonator can be referred to as a Helmholtz resonator. Certain sound frequencies can be damped in a targeted manner via the respective design of the resonator volume, the opening cross section of the resonator opening and a neck length of a resonator neck
Implementation Method 2
If the lining component alternatively or additionally comprises the fluid chamber and if the gaseous or liquid temperature-control medium is channeled through the fluid chamber of the lining component according to the invention, the lining component is temperature-controlled as a result
Data Source
AI summary
A lining component for lining a passenger cell of a motor vehicle is multifunctional. The lining component has at least one acoustic resonator which is open towards the passenger cell and/or at least a fluid chamber through which a temperature control medium is flowable.