Fuel Filter Assembly With Isolated Water Drainage Paths
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Solution Overview
Problem
Existing fuel-water separator filter assemblies in vehicles suffer from performance degradation due to water splashing onto the filter media, which is caused by vehicle movement, leading to reduced filtering efficiency.
Innovation Solution
A filter assembly design with separate fuel and water outlets, where the outlet assembly includes a first flow path for filtered fuel and a second flow path for separated water, fluidly isolated from the first path, preventing water from contacting the filter media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water reservoir is open to the outer diameter of the filter element, then water can be easily separated and drained, but water may splash and contact the filter media during vehicle movement, degrading filter performance
Solution Approach 1:
The outlet assembly is divided into separate first and second flow paths that are fluidly isolated from each other. The first flow path handles filtered fuel while the second flow path handles separated water, preventing water from contacting the filter media while maintaining ease of drainage operation.
Solution Approach 2:
The outlet assembly acts as an intermediary component between the filter element and the external environment. It provides a controlled interface that separates water and fuel flow paths, allowing water to be drained without directly exposing the filter media to water splashing.
2Reliability
If separate flow paths are implemented in the outlet assembly, then water contact with filter media is prevented, but device complexity increases
Solution Approach 1:
The outlet assembly merges multiple functions into a single component: it provides separate flow paths for water and fuel, serves as the interface for both outlets, and prevents water contact with the filter media all within one integrated assembly, reducing overall system complexity.
Solution Approach 2:
The outlet assembly performs multiple functions simultaneously: it separates water from fuel flow paths, provides drainage outlets for both fluids, prevents water contact with the filter element, and maintains structural support. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
A filter assembly comprises a housing defining an internal volume and comprising an inlet for receiving fuel, a first outlet to allow filtered fuel to exit the internal volume, and a second outlet to allow water separated from the fuel to exit the internal volume. A filter element is disposed within the internal volume for filtering the fuel to provide the filtered fuel and separate the water from the fuel. An outlet assembly is fluidly coupled to the first and second outlets and comprises a first flow path structured to communicate the filtered fuel to the first outlet, and a second flow path fluidly coupled to the internal volume of the housing and to the water reservoir so as to receive the water from the internal volume and communicate the water to the water reservoir. The second flow path is fluidly isolated from the first flow path.