Fuel Pump Module Nested Filter and Pump Configuration
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Solution Overview
Problem
Conventional fuel pump modules are oversized due to the larger diameters of the fuel pump and in-tank filter, making them difficult to mount in fuel tanks and requiring frequent filter replacements, which affects filtering performance and lifespan.
Innovation Solution
The fuel pump module design features a fuel pump mounted outside the in-tank filter with a centrally located fuel discharging port and a branched discharging port configuration, allowing for improved filtering performance, easier fuel flow, and enhanced sealing, while the in-tank filter and fuel pump are installed in a reservoir casing to reduce module size and simplify assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel pump and in-tank filter are provided with larger diameters, then filtering performance is improved, but the size of the fuel pump module increases making it difficult to mount in fuel tanks
Solution Approach 1:
The in-tank filter is positioned inside the reservoir body assembly with the fuel pump, creating a nested configuration where the filter occupies the central space while the pump surrounds it. This nesting arrangement allows both components to share the same spatial envelope, achieving improved filtering performance without proportionally increasing overall module volume.
Solution Approach 2:
The patent transitions from a side-by-side arrangement to a concentric/circular arrangement where the fuel pump is positioned circumferentially around the in-tank filter. This dimensional reorganization optimizes space utilization by using radial space rather than linear extension, reducing the module's footprint while maintaining component diameters for performance.
2Reliability
If the fuel pump and in-tank filter are provided with larger diameters, then filtering performance is improved, but ease of mounting in fuel tanks deteriorates
Solution Approach 1:
The nested configuration of the in-tank filter within the reservoir body assembly creates a compact, integrated unit that can be mounted as a single assembly. This reduces the complexity of installation compared to separate mounting operations, easing the mounting process despite the larger effective filtering diameter.
Solution Approach 2:
The patent integrates the fuel pump and in-tank filter into a single reservoir body assembly with a common housing and shared mounting interface. This merging of components into one unified unit simplifies the mounting operation to a single installation step, improving ease of mounting while maintaining the larger component diameters needed for filtering performance.
3Reliability
If the fuel discharging port is provided in the region where the filtering sheet is vertically installed, then filtering performance is improved, but fuel flow to the engine becomes difficult
Solution Approach 1:
The fuel discharging port is positioned at a specific location on the upper casing of the in-tank filter, optimized for both filtering performance and fuel flow. The local positioning allows the filtering sheet to maintain its vertical installation for effective filtration while the discharging port is strategically placed to ensure smooth fuel delivery to the engine, resolving the conflict between filtering and flow efficiency.
Data Source
AI summary
A fuel pump module, in which an in-tank filter and a fuel pump are installed at respective locations and held by a pump retainer, thereby allowing fuel to easily flow in the fuel pump module and realizing smallness and improved filtering performance of the fuel pump module.