Bag-Shaped Fuel Filter Joint Strength via Nipping and Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fuel supply devices with internal fuel filters face challenges in maintaining joint strength between filter members, leading to potential gas leakage and reduced effectiveness in filtering foreign matter.
Innovation Solution
A fuel supply device with a bag-shaped fuel filter formed by superimposed and joined filter members, featuring a nipping member to maintain filter member contact and a separation maintaining member to keep filter members apart, ensuring the joint strength is maintained even under external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple filter members are joined together to prevent gas leakage, then the reliability of fuel filtration is improved, but the joint portion becomes vulnerable to external forces reducing joint strength
Solution Approach 1:
The fuel filter is divided into multiple filter members (first filter member and second filter member) that are joined together. This segmentation allows each filter member to independently contribute to filtration reliability while the joining structure distributes external forces across multiple attachment points rather than concentrating stress at a single weak point.
Solution Approach 2:
The joining structure implements local quality by creating specific joining portions with enhanced structural properties at critical locations. The first and second joining portions are positioned at different locations on the filter members, with each joining portion having tailored structural characteristics to resist specific external forces while maintaining overall joint strength.
2Reliability
If filter members are placed in close contact to maintain oil membrane, then gas leakage is prevented, but external forces may break the contact and compromise filtration
Solution Approach 1:
The joining structure is designed in advance to compensate for external forces that may occur during operation. The first and second joining portions are positioned and structured to provide preemptive support, maintaining the close contact between filter members even when external forces attempt to separate them, thereby preserving the oil membrane integrity.
3Ease of manufacture
If filter members are joined at a single location to simplify structure, then manufacturing is easier, but external forces acting on the joint reduce overall filter strength
Solution Approach 1:
Instead of a single joining location, the filter members are joined at multiple discrete locations (first joining portion and second joining portion). This segmentation of the joining structure distributes the mechanical load across multiple points, enhancing overall filter strength while keeping each individual joining operation relatively simple and manufacturable.
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 configuration effectively prevents gas leakage and maintains filter strength, ensuring reliable fuel filtration and external force resistance, while allowing for efficient fuel passage and foreign matter removal.
Implementation Method 1
a fuel filter that is provided inside the fuel tank body and formed in an overall bag shape with plural sheets of filter members superimposed on each other and joined together by a joint portion so as to permit passage of the fuel and restrict the passage of foreign matter in the fuel
Data Source
AI summary
A fuel supply device is obtained in which joint strength can be maintained in a joint portion of plural filter members configuring a fuel filter. A fuel filter with an overall bag shape is configured by welding together an upper face filter cloth a lower face filter cloth of the fuel filter at a welded portion. A sub tank upper side member and a sub tank lower side member nip the upper face filter cloth and the lower face filter cloth at a nipping position that is at a different position from the welded portion.