Bowl Filter Cartridge Trap for Contaminant Isolation
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Solution Overview
Problem
Existing liquid filter arrangements, particularly bowl/cartridge types, face challenges in efficiently preventing contaminants and unfiltered fluid from being transferred to the clean side during filter replacement, leading to potential engine exposure.
Innovation Solution
A filter assembly design featuring a housing with a trap structure and a filter cartridge having a seal member that forms a radial seal with an upright section, ensuring contaminants are pushed back to the dirty side during cartridge replacement, and a hydrophobic mesh media for water coalescence, preventing unfiltered fluid from entering the clean side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional bowl/cartridge filter arrangement is used during filter replacement, then the filter cartridge can be removed and replaced, but contaminants and unfiltered fluid may be transferred to the clean side, exposing the engine
Solution Approach 1:
The trap structure is pre-configured in the housing with an upright section and connecting section that create a containment barrier. The seal member is pre-positioned on the cartridge to engage with this trap structure, establishing a protective barrier before contamination can occur during cartridge removal.
Solution Approach 2:
The trap structure acts as an intermediary barrier between the dirty side and clean side of the filter housing. It includes a nonporous upright section radially spaced from the housing wall and a nonporous connecting section that bridges between the upright section and housing, creating a physical barrier that prevents contaminant transfer during filter replacement.
2Reliability
If the seal member forms a radial seal with the upright section of the trap, then contaminants are pushed back to the dirty side, but the structure complexity increases
Solution Approach 1:
The trap structure is segmented into distinct functional sections: a nonporous upright section that provides the primary seal surface, and a nonporous connecting section that bridges the upright section to the housing. This segmentation allows each component to perform its specific function while maintaining overall structural integrity.
Solution Approach 2:
Instead of sealing against the housing wall directly, the seal member engages with the upright section of the trap that is radially spaced from the housing. This inverted sealing approach creates a barrier that actively pushes contaminants back toward the dirty side rather than merely containing them.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively traps contaminants and unfiltered fluid during filter replacement, reducing the risk of engine exposure and improving the efficiency of fluid filtration by ensuring that contaminants are not transferred to the clean side of the filter.
Implementation Method 1
a seal member on the second end cap and positioned to form a seal with the upstream surface of the upright section
Implementation Method 2
a hydrophobic mesh media for water coalescence
Implementation Method 3
A filter assembly is provided including a housing having a surrounding wall defining an interior volume; an open mouth in communication with the interior volume; an end opposite of the open mouth; and a surrounding trap in the interior volume
Data Source
AI summary
A bowl filter cartridge has an annular trap to catch and collect any contaminant, debris, or unfiltered fuel remaining in the filter housing during filter service. This prevents material being collected in the trap from being transferred to the clean side of a new filter, thereby reducing engine exposure.