Motor Vehicle Air Filter Sealing Bead Design
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Solution Overview
Problem
Existing air filter devices for motor vehicles face challenges in achieving a durable and flow-tight connection between the filter element and the filter housing, which can lead to faulty airflows and potential damage to the sealing elements due to relative movement and improper alignment.
Innovation Solution
The air filter device incorporates a frame part surrounding the filter element with a sealing element and a support bead that protrudes over the filter housing wall, providing a secure, flow-tight connection by reducing the risk of shearing and ensuring proper alignment, and also functions to connect the air channel directly with the filter element without additional fastening devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing element is arranged on the frame part to provide a flow-tight connection, then sealing effectiveness is improved, but the sealing element is vulnerable to shearing and damage due to relative movement between the filter element and filter housing
Solution Approach 1:
The support bead is designed to protrude into the sealing element in advance, creating a cushioning effect that absorbs relative movements between the filter element and filter housing. This preemptive design protects the sealing element from shearing forces and damage by providing a compliant support structure that accommodates dimensional changes and misalignments.
2Strength
If additional fastening devices are used to secure the filter element to the filter housing, then connection strength is improved, but device complexity and assembly steps increase
Solution Approach 1:
The frame part is merged with the sealing element to form an integrated assembly. The support bead on the frame part serves dual functions: providing structural support for the filter element and enabling flow-tight sealing through the protruding section that bears against the sealing element. This integration eliminates the need for separate fastening devices while maintaining connection strength.
3Duration of action of stationary object
If the support bead is positioned to press into the sealing element material, then sealing durability is improved, but the support bead may cause stress concentration on the sealing element
Solution Approach 1:
The support bead geometry is optimized with specific dimensional parameters: the protruding section has a controlled width that is smaller than the sealing element width, creating a beneficial stress distribution. The rounded front side of the support bead further modifies the contact parameters, distributing pressure more evenly across the sealing element surface while maintaining adequate sealing force.
Data Source
AI summary
An air filter device for a motor vehicle, having a filter element received in a filter housing which, at least in sections, is surrounded by an encompassing frame part. A support bead is held on the filter housing which protrudes over the directly adjacent filter housing wall, wherein a sealing element on the frame is supported by the support bead on the housing.