Filter Cartridge End-Cap Geometry for Correct Housing Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for easy installation of the correct filter element in complex filter housings while preventing the installation of the wrong filter element, especially in vehicles with intricate geometry and component positioning.
Innovation Solution
The design of an air filter cartridge with a seal member and support members forming a polygonal shape, where the corner portions of the outer radial side are unsupported by the support members, and a seal support arrangement with gaps aligned with the corner portions, facilitating correct installation and preventing misplacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex filter housing design is used to meet boundary conditions imposed by geometry and positioning of other vehicle components, then the filter housing can be properly integrated into the vehicle, but the installation of the correct filter element becomes difficult and the risk of installing the wrong filter element increases
Solution Approach 1:
The seal member is designed with an asymmetric polygonal shape having flat sides and corner portions, where the support members are positioned to support only the flat sides. This asymmetric configuration creates a unique fitting pattern that guides correct installation orientation and prevents installation of incorrect filter elements, while still adapting to the complex housing geometry requirements
Solution Approach 2:
The seal member is segmented into distinct functional zones: flat sides that interface with support members for structural support, and corner portions that extend beyond support members to engage with the housing. This segmentation allows each portion to perform its specific function in guiding installation and ensuring proper fit within the complex housing design
2Strength
If the seal member is fully supported by support members, then structural strength is maximized, but the corner portions cannot effectively engage with the housing to prevent incorrect installation
Solution Approach 1:
Different portions of the seal member have different support characteristics: the flat sides are locally supported by support members for structural strength, while the corner portions are intentionally left unsupported to allow engagement with the housing. This local differentiation of support quality simultaneously achieves both structural strength and installation reliability
Data Source
AI summary
A filter cartridge can include a media pack including media extending between a first end and a second end along a longitudinal axis; an end cap secured to the media and including: a seal member presenting a radially inward or outward facing seal surface, the seal member being formed from a first material; and a support structure including a base part and a plurality of spaced apart, radially flexible extensions, the support structure being formed from a second material harder and/or stiffer than the first material. At least a portion of the base part is covered by and/or embedded within the first material, and the plurality of flexible extensions includes an exposed portion that is uncovered by and/or embedded within the first material and defines an axial end of the filter cartridge and is coincident with a radial innermost portion of the end cap. The seal surface and the exposed portion of the flexible extensions are axially aligned such that a plane orthogonal to the longitudinal axis can pass through the seal member and through the exposed portion of the plurality of flexible extensions.