Dual Seal Filter Head Channel for Engine Fluid Integrity
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Solution Overview
Problem
Existing filter systems for internal combustion engines rely on single seals, which can become deformed over time, leading to compromised sealing and potential leaks, affecting the integrity of the fluid system and increasing maintenance needs.
Innovation Solution
A filter assembly with a dual seal system, where the seal member is received within a filter head channel, forming two seals between the seal member and the filter head, and a vent is used to evacuate air, enhancing the sealing efficiency and reducing the likelihood of unfiltered fluid passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single seal is used in the filter system, then the device complexity is reduced, but the reliability deteriorates as the seal becomes deformed over time causing leaks
Solution Approach 1:
The sealing system is divided into two separate seal members (first seal member and second seal member) positioned at different locations within the filter head channel. This segmentation allows each seal to independently perform its sealing function, and if one seal deforms or fails, the other seal continues to prevent leakage, thereby improving reliability without requiring a completely complex new system design
Solution Approach 2:
The dual seal arrangement acts as a preventive measure against future seal deformation. By having two seals in series, the system compensates for the inevitable deformation that occurs over time in single seal systems. The second seal serves as a backup that prevents leakage even when the first seal has degraded, providing beforehand protection against sealing failure
2Reliability
If a dual seal system is implemented, then the reliability is improved, but the device complexity increases
Solution Approach 1:
Both seal members are designed with the same basic structure and material properties, allowing them to perform the same sealing function. This universality simplifies the design process and manufacturing, as the same seal design can be replicated twice rather than creating two different complex sealing mechanisms, thereby improving reliability while controlling the increase in device complexity
Solution Approach 2:
The first and second seal members are nested within the same filter head channel structure, with each seal positioned at different axial locations. This nesting approach allows the dual seal system to be integrated into the existing filter head design without requiring separate housing or mounting structures for each seal, thus improving reliability while minimizing the increase in overall device complexity
3Duration of action of stationary object
If traditional gaskets are used, then the ease of manufacture is maintained, but the duration of action deteriorates as gaskets deform and require frequent replacement
Solution Approach 1:
The seal members are designed with optimized material properties and geometric parameters that enhance their resistance to deformation over time. By changing the material parameters (such as using elastomers with appropriate durometer ratings) and geometric parameters (such as seal cross-section shape and size), the service life of the sealing system is extended while maintaining manufacturability through standard sealing component design
4Reliability
If seals are made more robust to prevent deformation, then the reliability is improved, but the ease of operation deteriorates due to increased installation force required
Solution Approach 1:
By dividing the sealing function into two separate seal members, each seal can be designed with moderate robustness rather than requiring a single extremely robust seal. This segmentation allows each individual seal to be installed with reasonable force, while the combined system achieves high reliability, thus improving sealing integrity without excessively increasing installation difficulty
Solution Approach 2:
The dual seal arrangement provides a cushioning effect on installation forces. The first seal absorbs some of the installation force, and the second seal provides additional sealing without requiring the same extreme force that a single robust seal would need, thereby improving reliability while maintaining reasonable ease of operation
Data Source
AI summary
A filter assembly includes a filter head and a filter cartridge. The filter head includes a filter head coupling surface, a filter head outlet, a filter head inner wall, and a filter head outer wall. The filter head coupling surface defines a filter head opening. The filter head outlet is configured to provide a fluid. The filter head inner wall extends around the filter head outlet. The filter head outer wall extends around the filter head inner wall. The filter head inner wall and the filter head outer wall collectively define a filter head channel. The filter cartridge includes a filter cartridge shell and a filter element. The filter cartridge shell has a filter cartridge coupling surface that is configured to be coupled to the filter head coupling surface. The filter cartridge shell defines a filter cartridge opening.