Trunk Relief Valve Barrier for Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle noise reduction is hindered by sound entering through pressure relief valves in the trunk storage area, which is amplified by the vehicle structure, causing distraction to passengers.
Innovation Solution
A vehicle noise reducing assembly is designed with a barrier member positioned between the relief valve and a cavity to absorb sound, using a duct to direct sound to the barrier surface, which is made of insulating and dampening material to prevent sound from entering the trunk storage area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief valve is installed in the trunk storage area to relieve air pressure, then air pressure control is improved, but sound enters through the relief valve and is amplified by vehicle structure causing noise distraction
Solution Approach 1:
A barrier member is introduced as an intermediary element between the relief valve and the trunk storage area cavity. This barrier member selectively blocks sound waves from entering the cavity while allowing air pressure relief to function, thus mediating between the conflicting requirements of noise reduction and pressure control
Solution Approach 2:
The barrier member is positioned specifically at the cavity opening adjacent to the relief valve, creating a localized sound blockage only where needed. This local intervention prevents sound amplification in the cavity while maintaining the overall functionality of the relief valve system
2Reliability
If the relief valve is opened to relieve pressure, then pressure balance is improved, but sound amplification by vehicle structure increases noise
Solution Approach 1:
The barrier member serves as a mediator that intercepts sound waves before they can be amplified by the vehicle structure in the cavity. It allows the relief valve to remain open for pressure balance while preventing the harmful sound amplification effect
3Object-affected harmful factors
If a barrier member is added to block sound, then noise reduction is improved, but device complexity increases
Solution Approach 1:
The sound blocking function is extracted as a separate, independent barrier member that can be added to the existing relief valve assembly. This modular approach allows noise reduction to be implemented without fundamentally redesigning the entire pressure relief system, thereby limiting the increase in device complexity
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 barrier member effectively absorbs and reduces undesirable noise entering the vehicle interior, enhancing passenger comfort by minimizing sound amplification and preventing items from falling into the cavity.
Implementation Method 1
A barrier member is disposed in the second cavity with a barrier surface positioned between the relief valve and the second cavity to prevent sound passing through the drafter opening from entering the second cavity
Implementation Method 2
using a duct to direct sound to the barrier surface, which is made of insulating and dampening material to prevent sound from entering the trunk storage area
Data Source
AI summary
A vehicle noise reducing assembly includes a trunk structure having a floor panel, an interior wall panel and an exterior wall panel. A trunk storage area is defined by the interior wall panel and the floor panel. A trim panel is connected to the interior wall panel within the trunk storage area. A cavity is defined by the floor panel, the exterior wall panel and the trim panel and has a first cavity and a second cavity. A relief valve is disposed in a vent opening in the exterior wall panel. The relief valve extends into the first cavity and has a drafter opening facing inboard. A barrier member is disposed in the second cavity with a barrier surface positioned between the relief valve and the second cavity to prevent sound passing through the drafter opening from entering the second cavity.