Air Filter Cartridge End Cap for Guided Alignment and Sealing
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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 element, particularly in vehicles with intricate geometry and component positioning.
Innovation Solution
The design of an air filter cartridge with a seal member and support structure featuring a polygonal shape and aligned support members, ensuring proper alignment and sealing within the housing assembly, and an outlet tube assembly with guided rotational alignment for correct installation.
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 adaptability to vehicle constraints is improved, but the ease of installation of filter elements deteriorates
Solution Approach 1:
The filter housing incorporates asymmetric geometric features including a non-circular outlet tube arrangement and eccentric positioning of mounting features. These asymmetric elements provide unique alignment cues and mechanical interlocks that guide correct filter element installation while accommodating the complex spatial constraints of the vehicle engine bay.
Solution Approach 2:
The housing includes pre-formed receiving cavities and pre-positioned mounting features that align with corresponding features on the filter element. The outlet tube is pre-configured with specific angular orientations and positioning features that automatically guide the filter element into the correct rotational alignment during installation, eliminating the need for complex alignment procedures.
2Adaptability or versatility
If a complex filter housing design is used to meet boundary conditions, then the adaptability to vehicle constraints is improved, but the reliability of correct filter element installation deteriorates
Solution Approach 1:
The filter housing incorporates asymmetric geometric features including a non-circular outlet tube arrangement and eccentric positioning of mounting features. These asymmetric elements provide unique alignment cues and mechanical interlocks that guide correct filter element installation while accommodating the complex spatial constraints of the vehicle engine bay.
Solution Approach 2:
The housing includes tactile feedback features such as raised alignment ridges, recessed positioning cavities, and mechanically interlocking features that provide physical confirmation when the filter element is correctly installed. Misalignment is immediately apparent through lack of engagement or improper fit, ensuring reliable correct installation.
3Ease of manufacture
If the outlet tube has a circular cross-section, then the manufacturing simplicity is improved, but the ability to provide rotational alignment guidance deteriorates
Solution Approach 1:
The outlet tube is designed with a non-circular cross-section featuring flat sides and corner portions that correspond to specific mounting features on the filter housing. This asymmetric geometry provides inherent rotational alignment guidance, ensuring the filter element can only be installed in the correct rotational orientation while remaining manufacturable through standard forming processes.
Solution Approach 2:
The outlet tube geometry is segmented into distinct features including flat sides, corner portions, and recessed areas that correspond to specific mounting locations. These segmented geometric features provide multiple alignment cues that guide correct filter element installation while maintaining manufacturing feasibility through conventional techniques.
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.