Fuel Filter Water Drainage via Embedded Duct and Asymmetric Placement
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Solution Overview
Problem
Existing diesel fuel filters with integrated water drainage systems are complex to assemble and costly, often requiring additional components that increase the filter's size and complexity, making them difficult to install in the cluttered environment of a combustion engine.
Innovation Solution
A water-separating fuel filter design with an off-center mounted water evacuation duct embedded within the filtering element, allowing for a conventional annular filter medium and reduced bottom size, facilitating easier assembly and integration of functional components like heaters, while maintaining flexibility in installation and efficient water drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional water drainage system with a cap is used, then water can be effectively drained from the filter, but the filter size increases and accessibility becomes difficult in cluttered engine environments
Solution Approach 1:
The water drainage system is nested within the filter element itself. The water evacuation duct is embedded in the filtering element and positioned close to the internal face of the filtering medium, allowing the drainage functionality to be integrated into the existing filter structure without increasing its external dimensions.
Solution Approach 2:
The water evacuation duct is positioned in an off-center location adjacent to the filter medium rather than at the bottom center, utilizing the radial dimension of the filter element. This dimensional repositioning allows effective water drainage while maintaining a compact filter footprint suitable for cluttered engine compartments.
2Ease of operation
If a rod mechanism with spring element is used for drain plug operation, then the drain plug can be operated from the upper side, but the assembly becomes more complex and the price increases
Solution Approach 1:
The complex rod mechanism with spring element is extracted and replaced by a simpler direct-operated plug system. The drain plug is directly operable from the upper side of the filter through the water discharge orifice, eliminating the need for intermediate mechanical transmission components.
Solution Approach 2:
The drain plug system is designed to be self-operating without requiring additional mechanical assistance. The plug can be directly removed or actuated from the upper side of the filter, allowing maintenance personnel to perform drainage operations simply by accessing the top of the filter housing.
3Reliability
If the water evacuation duct is positioned at the bottom center, then water drainage is efficient, but the central zone is occupied and cannot accommodate heating components or other functional elements
Solution Approach 1:
The water evacuation duct is positioned asymmetrically in an off-center location rather than at the bottom center of the filter element. This asymmetric positioning maintains effective water drainage by keeping the duct adjacent to the filter medium while freeing the central zone for the integration of heating components, water detectors, or other functional elements.
Solution Approach 2:
The water evacuation duct is positioned locally adjacent to the filter medium where water accumulation occurs, rather than requiring central positioning. This localized placement of the drainage function allows the central zone to be allocated for other purposes, enabling multi-functional integration within the filter assembly.
4Adaptability or versatility
If additional functional components are integrated into the filter, then the filter becomes more versatile, but the size increases and installation becomes more difficult
Solution Approach 1:
The filter element is designed with a universal structure that can accommodate multiple functional components. The off-center water evacuation duct positioning and the freed central zone enable the integration of heating components, water detectors, or other functional elements within the existing filter housing without requiring additional space or increasing the overall filter dimensions.
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 simplifies the assembly and reduces the size of the fuel filter, enabling easier installation and integration of additional components without increasing the filter's periphery, while maintaining effective water drainage and filtration capabilities.
Implementation Method 1
by the use of a coalescing media whose fibers that compose it will promote the grouping of the water droplets contained in the diesel fuel into larger drops (coalescence phenomenon) which will then descend by gravity to the bottom of the filter
Implementation Method 2
which will then descend by gravity to the bottom of the filter
Implementation Method 3
by means of a hydrophobic media or fabric which prevents water from passing through the media
Data Source
AI summary
The filter (1) has a case (2) including an upper wall and a lower wall that includes bottom (2a). A filtering element (4) is placed in an inner volume (V) and remote from the bottom so as to place a water accumulation zone between the filtering element and the bottom. A water discharging device (14) crosses a water evacuation opening (15) formed remotely from the bottom in the case. The device includes a water evacuation pipe (16), which extends in the interior volume and an interior space (9), and is integral with the filtering element.