Vehicle Air Filter Cartridge Guidance for Leak-Safe Positioning
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Solution Overview
Problem
Existing air filtration assemblies in vehicles suffer from ineffective filtration due to incorrect positioning of filter cartridges, leading to air leakage and potential damage, which complicates maintenance and increases the risk of improper installation.
Innovation Solution
The air filtration assembly features a box and filter cartridge design with a plate group and tubular filter media, where the cartridge is inserted in a guided, one-way manner, ensuring correct positioning through specialized sealing and contact profiles that engage with the box, preventing leakage and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter cartridge is freely insertable into the box, then the ease of operation is improved, but the positioning precision deteriorates leading to incorrect installation
Solution Approach 1:
Guide elements are introduced as intermediary components between the filter cartridge and the box. These guide elements protrude from the box wall and engage with corresponding recesses or features on the filter cartridge, providing mechanical guidance during insertion. This ensures the filter cartridge is automatically positioned at the correct location and orientation, preventing incorrect installation while maintaining simple one-handed insertion operation.
2Ease of operation
If the sealing profile is soft and flexible, then the ease of operation is improved for sealing, but the strength deteriorates leading to potential damage
Solution Approach 1:
The sealing profile is constructed as a composite structure combining a soft, flexible sealing layer (such as rubber or elastomer) with a stronger supporting substrate or reinforcement structure. The soft layer ensures effective sealing contact with the box gasket, while the reinforced core provides mechanical strength to prevent damage during handling and installation. This composite design allows the sealing profile to be both easily installed and sufficiently strong.
3Manufacturing precision
If complex positioning mechanisms are added, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The positioning function is segmented into multiple simple, distributed guide elements rather than one complex positioning mechanism. Several small guide protrusions are placed at different locations on the box, each engaging with corresponding features on the filter cartridge. This segmentation achieves precise positioning through the cumulative effect of multiple simple constraints, avoiding the need for complex mechanical systems while ensuring accurate filter cartridge placement.
Data Source
AI summary
A vehicle air filtration assembly includes a box having a longitudinal axis and a wall extending along first and second axes. A filter cartridge includes tubular filter media operatively connected to a plate group. The plate group has a first face with a sealing profile and a second face having at least two contact profiles. The filter cartridge is insertable into the box along an insertion direction substantially parallel to the first or second axis. The box includes a housing region between the wall and contact elements longitudinally spaced from the wall and axially spaced from each other. The plate group is housed in the housing region with the a sealing profile engaged with the wall and the contact profiles engaged to the contact elements. The sealing profile or contact profiles are shaped/positioned at variable vertical distances relative to an imaginary extension plane.