Removable Air Cleaner Filter Cartridge for Leak-Resistant Sealing
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Solution Overview
Problem
Existing air filter assemblies for internal combustion engines require improvements in assembly, serviceability, and filtering capabilities, particularly in terms of servicing filter media within filter housings.
Innovation Solution
A two-stage air cleaner assembly with a primary and optional secondary filter cartridge, featuring a precleaner and a removable filter cartridge design with a sealing mechanism and projection-receiver arrangement to ensure proper alignment and sealing, enhancing the assembly's serviceability and filtering efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a serviceable filter cartridge is used in an air cleaner assembly, then the filter media can be serviced (cleaned or replaced) after a period of use, but the assembly requires complex sealing and alignment mechanisms to ensure proper installation and prevent leaks
Solution Approach 1:
The air cleaner assembly is divided into separable components: a housing and a removable filter cartridge. The filter cartridge can be independently removed and replaced without disassembling the entire housing, enabling easy serviceability while maintaining a relatively simple overall structure.
Solution Approach 2:
A sealing member is introduced as an intermediary component between the filter cartridge and housing. This sealing member ensures proper sealing and prevents leaks, allowing the filter cartridge to be easily removable while maintaining effective sealing without requiring complex integrated sealing mechanisms.
2Ease of repair
If a removable filter cartridge design is implemented, then maintenance becomes easier, but the risk of improper installation and leaks increases
Solution Approach 1:
The sealing member acts as an intermediary that compensates for potential installation variations. It ensures reliable sealing even when the filter cartridge is removed and reinstalled, maintaining installation reliability while preserving maintenance ease.
Solution Approach 2:
The sealing member is made of elastomeric material that can deform and adapt to slight dimensional variations in the mating surfaces. This elasticity allows the seal to maintain effective sealing across a range of installation conditions, reducing the risk of leaks from improper installation.
3Productivity
If a precleaner is added to the air cleaner assembly, then filtering capabilities are enhanced, but the device complexity and number of components increase
Solution Approach 1:
The precleaner is integrated with the filter cartridge as a single assembled unit. The precleaner element is positioned within the cartridge housing, allowing both precleaning and main filtration functions to be delivered through one removable component, thereby enhancing filtering capabilities without proportionally increasing overall device complexity.
Solution Approach 2:
The filtration system is segmented into two functional stages: a precleaner for preliminary particle removal and a main filter cartridge for fine filtration. This segmentation allows each component to be optimized for its specific function while maintaining manageable complexity through modular design.
Data Source
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AI summary
A filter cartridge for an air cleaner assembly is disclosed. The filter cartridge can include a media pack configured for installation into an air cleaner housing, the media pack extending along a longitudinal axis between opposite inlet and outlet flow ends, the media pack defining an outer perimeter. The filter cartridge can also include a circumferential shell surrounding at least a portion of the media pack outer perimeter. A radial flange extending from the circumferential shell proximate the media pack inlet end can also be provided. The flange can define a plurality of openings that are configured to receive protrusions on a housing body of the air cleaner assembly. The interaction between the protrusions and openings operates to ensure a secure seal between the housing body and the seal member.