Fuel Pre-Filter Module with Integrated Check Valve and Priming Pump
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Solution Overview
Problem
Existing fuel filtering systems for internal combustion engines lack versatility, efficient incorporation of optional functions, and environmental protection features, and do not effectively address the need for improved production costs and maintenance capabilities.
Innovation Solution
A fuel pre-filter module with a filter element and filter head that includes a priming pump check valve, umbrella-type check valves made of elastomeric materials, and a cup assembly for capturing and draining fuel, along with axially extending ribs for correct positioning, allowing for the integration of optional functions like fuel heaters and sensors, and meeting environmental protection requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fuel filter system is designed with fixed structure, then manufacturing is simpler, but adaptability to incorporate optional functions (fuel heater, sensors) is reduced
Solution Approach 1:
The fuel filter system is divided into modular components: a filter head assembly and a separate filter element. The filter element can be detached and replaced, allowing different configurations (with or without check valves, heaters, sensors) to be used in the same filter head. This segmentation enables versatility without increasing overall system complexity.
Solution Approach 2:
The filter head assembly is designed as a universal base that can accommodate multiple optional functions through standardized mounting interfaces. Sensors, fuel heaters, and check valves can be integrated into the filter element or filter head using common mounting mechanisms, allowing one base design to serve multiple functional requirements.
2Ease of repair
If check valves are integrated into the filter element, then the filter element becomes self-contained and easier to replace, but the filter element structure becomes more complex
Solution Approach 1:
The check valve is merged with the filter element into a single integrated component. The check valve is positioned within the filter element housing, allowing the entire assembly to be replaced as one unit. This merging simplifies maintenance (entire element replaces rather than just the valve) while the modular design keeps the structural complexity manageable.
3Reliability
If multiple check valves are stacked and coupled in the filter head, then priming pump functionality is improved, but the filter head structure becomes more complex
Solution Approach 1:
Multiple check valves are nested within the filter head assembly in a stacked configuration. The check valves are arranged in series within the same housing space, with each valve positioned to control flow at different stages of the priming pump operation. This nesting achieves enhanced functionality without proportionally increasing external dimensions or structural complexity.
4Manufacturing precision
If ribs are added to enforce correct positioning, then assembly precision is improved, but manufacturing complexity increases
Solution Approach 1:
Positioning ribs are incorporated into the filter element and corresponding recesses into the filter head during the design phase. These ribs and recesses are built-in features that automatically guide correct axial positioning during assembly, eliminating the need for complex adjustment procedures or additional fastening mechanisms. The preliminary integration of positioning features simplifies manufacturing compared to post-assembly adjustments.
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 versatile, cost-effective, and environmentally friendly fuel pre-filter module that efficiently filters fuel, separates water, and allows for easy maintenance, enhancing the operational efficiency and environmental sustainability of internal combustion engines.
Implementation Method 1
A first check valve is arranged within the interior of the central tubular projection on the first valve seat and is adapted to allow fluid flow in a first direction and block fluid flow in an opposite second direction
Implementation Method 2
a filter medium, an upper end plate, and a first check valve. The filter medium is configured as a hollow filter medium body
Data Source
AI summary
Disclosed is an exchangeable filter element having an integrate check valve and alignment features. Also disclose is a fuel pre-filter module for pre-filtering fuel for internal combustion engines which is configured to receive the filter element. The fuel pre-filter module, for example finding beneficial use with internal combustion engines for light trucks, buses, construction, and agricultural machines.