Fuel Filter Cartridge Pin Actuation Valve Stabilization
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Solution Overview
Problem
Existing fluid filtration systems lack effective mechanisms to prevent damage to downstream components and system malfunctions caused by missing or incorrect filter cartridges, particularly in fuel and hydraulic systems.
Innovation Solution
A filter cartridge design that includes a pin to actuate a flow control valve in the filter housing, ensuring fluid flow only when an appropriate filter cartridge is installed, with the pin extending through an axially facing inlet opening to stabilize the valve poppet and prevent lateral movement, allowing fluid to flow through when the correct cartridge is in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve is used to control fuel flow in a fuel filter housing, then fluid flow can be controlled to prevent damage to downstream components, but the system becomes more complex requiring additional components like pins, endcaps, and flow channels
Solution Approach 1:
The pin, first endcap with opening, second endcap, disk portion, skirt, ribs, and flow channels are merged into a single integrated filter cartridge assembly that performs multiple functions: filtering fluid, actuating the valve, and controlling flow paths
Solution Approach 2:
The filter cartridge serves multiple functions simultaneously: it filters the fluid through the filtering media, actuates the flow control valve through the pin, and directs fluid flow through the flow channels and ribs, eliminating the need for separate components
2Reliability
If the pin is designed to actuate the flow control valve, then fluid flow is controlled to prevent damage, but the pin and associated structures add complexity to the filter cartridge design
Solution Approach 1:
The pin actuation mechanism is merged with the filter cartridge structure, where the pin extends from the second endcap through the filtering media to directly actuate the valve, eliminating separate actuation components
Solution Approach 2:
The pin serves as an intermediary element that translates the mechanical presence of the filter cartridge into valve actuation, enabling automatic flow control based on filter installation status
3Reliability
If the second endcap is devoid of openings, then fluid flow is controlled through specific channels, but this restricts fluid flow paths and requires precise design of flow channels and ribs
Solution Approach 1:
The second endcap has different local qualities: it is devoid of openings to control flow, while the ribs provide localized flow directing surfaces and the flow channels provide controlled passage paths, creating precise flow control in specific locations
Solution Approach 2:
The ribs act as intermediary structures between the flow channels and the interior space, directing and controlling fluid flow paths while maintaining the closed structure of the second endcap
Data Source
AI summary
An upper endcap of a fuel filter cartridge includes a skirt, an axially extending pin surrounded by the skirt, and a plurality of ribs that define fluid flow channels leading to the pin. The pin is extendable through an axially facing fuel inlet opening at the upper end of a standpipe for actuating a valve to an open position allowing fuel to flow through the axially facing inlet opening and into the standpipe. The valve can include a hole that receives the pin therein to help stabilize the valve when the valve is actuated open.