Vehicle Duct Bezel Rib Extension for Filter Sealing
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Solution Overview
Problem
The existing duct opening portion structure for air intake ducts in vehicles fails to secure maximum air amount increase and air cleaning performance due to a reduced opening area and lack of effective sealing between bezel and garnish components, leading to potential air leakage and insufficient filtration.
Innovation Solution
A duct opening portion structure featuring a bezel with a rib that supports the filter and includes an extension portion pressed against a seal member, ensuring a large opening area and complete air flow through the filter, while simplifying filter replacement by integrating bezel and filter replacement operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bezel is designed with both filter locking projections and garnish locking projections in the height direction, then the filter replacement function is secured, but the opening area at the air introduction side is reduced
Solution Approach 1:
The sealing function is transitioned from a vertical arrangement (between bezel and garnish) to a horizontal arrangement (between rib extension portion and seal member). This dimensional change allows the sealing function to be achieved without occupying vertical space that would reduce the opening area, while still providing effective sealing and maintaining filter replacement capability.
2Device complexity
If no special sealing structure is provided between bezel and garnish, then the device complexity is reduced, but air leakage occurs and air cleaning performance is insufficient
Solution Approach 1:
The sealing function is extracted from the garnish component and transferred to the rib extension portion of the bezel. This separation allows the sealing structure to be integrated into the existing bezel design without adding complex separate sealing mechanisms, thereby maintaining simplicity while ensuring reliable sealing and air cleaning performance.
3Productivity
If the opening area at the air introduction side is increased, then the air amount increase performance is improved, but the structural stability of the duct opening portion may be compromised
Solution Approach 1:
The rib extension portion is designed in advance with sufficient length to provide both structural support and sealing capability. This preliminary design ensures that when the opening area is maximized, the structural integrity and sealing function are already built into the base structure, preventing instability while allowing for larger opening areas.
Data Source
AI summary
A duct opening portion structure includes an air intake duct; a filter that is disposed in an opening portion at an air introduction side of the air intake duct; and a bezel that is disposed in the opening portion at the air introduction side of the air intake duct, the bezel being configured to support the filter. The bezel is attached to a vehicle body-side member, and the bezel includes a rib including a support portion configured to support the filter. The filter is attached to the support portion. The rib is provided with an extension portion having a length that allows the extension portion to be directly or indirectly pressed against a seal member provided at an edge of the opening portion in a state where the bezel is attached to the vehicle body-side member.