Multifunctional Fuel Filter Medium Gradient Filtration
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Solution Overview
Problem
Existing fuel filter devices face challenges in producing a bag-like filter member with improved filtering accuracy and long service life while minimizing production costs and complexity, particularly in maintaining proper shape and preventing clogging.
Innovation Solution
A fuel filter device with a multifunctional filter medium formed by stacking filter media with varying cross-sectional areas, using air-laid non-fabric media and melt-bonded layers to capture dust and dirt of different sizes, and incorporating a mesh fabric for water separation, allowing for easy production and reduced clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple filter media are stacked to create a gentle filter gradient for improved filtering accuracy and longer service life, then filtering performance is improved, but production cost increases and manufacturing complexity increases
Solution Approach 1:
The patent combines multiple filtering functions into a single multifunctional filter medium by integrating different fiber materials (synthetic fibers and natural fibers) with different pore sizes within one layer, eliminating the need to stack multiple separate filter media layers while achieving gentle gradient filtering效果
Solution Approach 2:
The single filter medium performs multiple functions simultaneously: coarse particles are captured by larger pores, fine particles are captured by smaller pores, and the combination of synthetic and natural fibers provides both structural integrity and filtering performance across different particle sizes
2Reliability
If multiple filter media are stacked to improve filtering accuracy, then filtering performance is improved, but the difficulty of manufacturing the bag-like shape increases
Solution Approach 1:
By combining multiple filtering functions into one flexible filter medium layer, the patent eliminates the need to stack and melt-bond multiple layers, significantly simplifying the manufacturing process while maintaining bag-like shape integrity
Solution Approach 2:
The patent changes the physical parameters of the filter medium by combining different fiber types and pore sizes within a single layer, achieving the filtering效果 of multiple layers without the manufacturing complexity
3Reliability
If multiple filter media are stacked to improve filtering accuracy, then filtering performance is improved, but production cost increases
Solution Approach 1:
The patent merges multiple filtering functions into a single filter medium layer, reducing material costs and production expenses associated with stacking multiple layers while maintaining or improving filtering accuracy through the combination of different fiber materials with different pore sizes
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 solution provides a filter device with enhanced filtering accuracy and extended service life at a lower cost, minimizing the number of melt-bonded portions and preventing clogging, while maintaining structural integrity and effective particle capture.
Implementation Method 1
at least one of the filter media being configured that fuel passages in the at least one filter medium have different cross-sectional areas at a primary side and a secondary side of the at least one filter medium in order to serve as a multifunctional filter medium having a function of stepwise capturing dust and dirt having different particle sizes
Implementation Method 2
When the filter member is formed in a bag-like shape by stacking plural melt-bondable filter media formed in a sheet-like or mat-like shape
Data Source
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AI summary
A fuel filter device includes a filter member formed in a bag-like shape and is attached to a fuel suction opening inside a fuel tank so as to communicate an inner space of the filter member with the fuel suction opening. The filter member is formed by stacking at least two filter media. At least one of the filter media is configured that fuel passages in the at least one filter medium have different cross-sectional areas at a primary side and a secondary side of the at least one filter medium in order to serve as a multifunctional filer medium having the function of stepwise capturing dust and dirt having different particle sizes.