Fuel Filter Cartridge with External Water Discharge Cannula
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Solution Overview
Problem
Existing fuel filtration systems face inefficiencies in water separation from diesel fuel, with flexible discharge conduits causing efficacy issues and increased assembly costs, and solutions that integrate discharge conduits within the filter cartridge restrict fluid dynamics and component dimensions.
Innovation Solution
A filter cartridge design featuring a tubular filter wall with external support plates and a connecting cannula that defines the water discharge conduit, allowing for a single-piece construction that simplifies assembly and maintenance while maintaining fluid dynamics, and includes a hydrophobic net and helically developed support core to enhance water separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the discharge conduit is made flexible and allowed to move freely internally of the casing, then the assembly is simpler, but the efficacy of water discharge is compromised
Solution Approach 1:
The discharge conduit is constructed as a flexible tube that can bend and adapt to the internal geometry of the filter cartridge while maintaining its function. The flexibility allows the conduit to be positioned optimally for water discharge without requiring complex rigid structures or precise assembly, thus maintaining both ease of manufacture and discharge efficacy
2Reliability
If the cannula crosses the support plates and filter wall to open at the bottom of the beaker body, then water discharge efficacy is improved, but assembly costs and production complexity increase considerably
Solution Approach 1:
The discharge conduit is extracted from the complex internal routing path (crossing support plates and filter wall) and repositioned to open at the lateral wall of the beaker body. This extraction simplifies the assembly by eliminating the need to penetrate multiple components while still achieving effective water discharge through the lateral opening
3Ease of manufacture
If the discharge conduit is partially realised in the support plates and support core, then assembly is simplified, but the passage surface of filtered fluid is limited and fluid-dynamic resistance increases
Solution Approach 1:
The discharge conduit is segmented into distinct portions: axial sections within the support plates for structural integration, and a connecting cannula arranged externally to the filter wall for unobstructed fluid flow. This segmentation allows the conduit to benefit from simplified assembly where appropriate while maintaining high fluid flow capacity in the external connecting portion that does not restrict the filtered fluid passage
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
This design effectively collects and discharges water without limiting fluid dynamics, reduces production and maintenance costs, and improves water separation efficiency by using a hydrophobic net and helical rib to aggregate water molecules, facilitating their precipitation at the bottom of the casing.
Implementation Method 1
filter walls are used which are able to separate, by coalescence, the water from the fuel
Implementation Method 2
the water present in the liquid to be filtered tends to accumulate on the bottom of the beaker body and must therefore be removed
Implementation Method 3
the support core being provided with at least a rib having a helical development deriving from the external mantle of the support core and able to internally graze the filter wall
Data Source
AI summary
A filter cartridge (30) for filtering fuel, comprising a filter wall (31) having a tubular shape, a first support plate (32) fixed to an end of the filter wall (31) and a second support plate (33) fixed to the opposite end of the filter wall, each support plate (32, 33) defining a respective portion (324,325;335,336) of a discharge conduit (324,325; 50; 335,336) of the water which separates from the fuel during filtration of the fuel; the peculiarity of the invention consists in the fact that it comprises a connecting cannula (50) able to connect the portions (324,325;335,336) and arranged externally of the filter wall (31).