High-Pressure Fuel Pump Filter Concave Edge Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-pressure fuel pumps face increased risk of web section breakage due to dirt accumulation and bending stress, leading to reduced service life and reliability, especially when the screen section curves outward and folds inward during flow changes.
Innovation Solution
The fuel filter device features concavely curved edge regions of the screen sections, which are widened in the axial direction, reducing the risk of breakage and stress concentrations, and a flat screen section design under normal conditions to prevent inward folding and pressure-induced flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screen section is designed with standard width web sections, then the throughput area is maximized, but the web sections are prone to breakage due to bending stress and dirt accumulation
Solution Approach 1:
The web sections are designed with non-uniform width, being wider at the axial edge regions adjacent to the base section and end section, and narrower in the central region. This local variation in geometry provides targeted reinforcement at stress-prone areas while preserving throughput area in the central filtering region, resolving the contradiction between durability and productivity
2Strength
If the screen section curves outward under pressure, then the structural integrity is maintained, but the web sections fold inward during flow changes causing breakage
Solution Approach 1:
The axial edge regions of the screen section are designed with concave curvature when viewed from the center of the screen section. This curvature reinforcement at the edge regions provides structural support that prevents inward folding during flow changes, while the overall outward curvature under pressure is maintained for structural integrity
3Reliability
If the web sections are reinforced by widening them, then the breakage risk is reduced, but the available throughput area is decreased
Solution Approach 1:
The web sections feature non-uniform width distribution with concentrated widening at the axial edge regions where bending stress is highest, while the central region maintains adequate width for throughput. This localized reinforcement strategy minimizes the impact on overall throughput area while maximizing reliability at critical stress points
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a fuel filter device (50) comprising an annular base section (52) and a total of at least one approximately cylindrical filter section (54) extending from same, wherein the filter section (54) has a plurality of bridge sections (56) extending from the base section (52) in a longitudinal direction (62), a respective sieve section (58) between two neighbouring bridge sections (56), and an end section (60) arranged at a distance from the base section (52) when viewed in the longitudinal direction (62). According to the invention, a first edge region (66) of the sieve section (56) next to the base section (52) and/or a second edge region (68) of the sieve section (58) next to the end section (60) is/are curved in a concave manner towards a centre (70) of the sieve section (58) when viewed from this centre (70).