Multistage Fuel Filter With Hydrophobic Screen for Residual Water Removal
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Solution Overview
Problem
Existing fuel-water separator filter assemblies fail to effectively remove residual water from fuel, leading to undesirable water presence in clean fuel, especially after passing through multiple separation layers.
Innovation Solution
A multilayer filter media system incorporating a hydrophobic screen at the outlet endcap and a tapered filter media tube, along with a sealing member, to enhance water separation efficiency up to 99%. The system includes a first filter media for radial flow, a second filter media for coalescing and stripping water, and a hydrophobic screen for final water removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-layer filter media is used, then the device complexity is low, but the water separation efficiency is insufficient
Solution Approach 1:
The filter media is divided into multiple functional layers: a first filter media for initial filtration, a second filter media for water coalescence, and a hydrophobic screen for final water separation. Each layer performs a specific function, collectively achieving high water separation efficiency while maintaining manageable device complexity through modular design
Solution Approach 2:
The invention uses composite filter media structures combining different materials with complementary properties: hydrophilic coalescing media for water droplet aggregation and hydrophobic materials for water repellency. This composite approach enables high water separation efficiency by leveraging the synergistic effects of different material properties
2Reliability
If a multilayer filter media with hydrophobic screen is implemented, then the water separation efficiency increases to 99%, but the manufacturing complexity increases
Solution Approach 1:
The multilayer structure is segmented into discrete, manufacturable components that can be assembled sequentially. The first filter media, second filter media, and hydrophobic screen are manufactured separately using conventional processes, then assembled in a standardized sequence, maintaining ease of manufacture while achieving high water separation efficiency
Solution Approach 2:
The filter element design incorporates universal mounting interfaces and standardized dimensions that allow the multilayer structure to be integrated into existing filter housings without requiring custom manufacturing processes. This multi-functionality approach enables high water separation efficiency while maintaining compatibility with conventional manufacturing and installation procedures
3Reliability
If a multilayer filter media with hydrophobic screen is implemented, then the water separation efficiency increases to 99%, but the manufacturing cost increases
Solution Approach 1:
The invention utilizes porous hydrophobic screen materials with controlled pore sizes and distributions that can be manufactured using established techniques. The porous structure provides high water separation efficiency through capillary pressure effects, while the materials themselves are cost-effective and can be produced at scale using conventional porous material manufacturing processes
Solution Approach 2:
The design optimizes parameters such as pore size, layer thickness, and material porosity to achieve the minimum effective configuration for 99% water separation. By carefully selecting and optimizing these parameters, the invention achieves high water separation efficiency while minimizing material usage and manufacturing cost
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 system achieves high water separation efficiency, allowing up to 99% removal of water from fuel, while being easily integratable with existing filter elements without significant manufacturing complexity or cost increase.
Implementation Method 1
A hydrophobic screen is disposed across the outlet defined in the endcap
Implementation Method 2
A second filter media is disposed radially inward of the first filter media, the second filter media structured to coalesce water
Data Source
AI summary
A filter element includes a first filter media defining a central channel. An endcap is disposed on an end of the filter media, the endcap defining an outlet for clean fluid to exit the filter media. A second filter media is disposed radially inward of the first filter media, the second filter media structured to coalesce water. A hydrophobic screen is disposed across the outlet defined in the endcap.