In-tank Filter Reinforcing Ring for Fuel Pump Module
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Solution Overview
Problem
In-tank filters made of synthetic resin materials for fuel pump modules are prone to deformation and cracking under high temperature and pressure conditions, especially when using biofuels, leading to functional failures such as water and pressure leakage.
Innovation Solution
Incorporating a deformation prevention reinforcing ring with a container insertion hole and protrusions on the outer side of the upper container to prevent expansion and cracking, made of either metal or thicker synthetic resin, which is closely adhered to the upper container to maintain structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If upper and lower containers are made of synthetic resin material, then production cost is reduced and corrosion resistance is improved, but the containers become vulnerable to high temperature and high pressure, leading to deformation and cracking
Solution Approach 1:
The patent applies composite materials by combining synthetic resin containers with a metal reinforcing ring. The container body remains synthetic resin for cost-effectiveness and corrosion resistance, while the metal ring provides the necessary strength and rigidity to prevent deformation and cracking under high temperature and pressure conditions. This composite structure resolves the contradiction by integrating the advantages of both materials.
Solution Approach 2:
The patent applies local quality by adding a metal reinforcing ring only at specific critical locations where deformation and cracking are most likely to occur, rather than making the entire container from metal. This localized reinforcement provides the necessary structural integrity at key stress points while maintaining the cost benefits of synthetic resin for the rest of the container body.
2Strength
If the thickness of upper and lower containers is increased, then deformation prevention effect is improved, but weld lines are generated during molding and the coupled state deteriorates
Solution Approach 1:
Instead of increasing the thickness of synthetic resin containers which would create molding defects and poor coupling, the patent uses a metal reinforcing ring to provide the necessary strength. This approach achieves deformation prevention without compromising manufacturing precision or coupled state quality, as the metal ring can be precisely fitted and secured without the molding issues that plague thick synthetic resin parts.
3Reliability
If metal containers are used instead of synthetic resin, then resistance to high temperature and pressure is improved, but corrosion occurs, welding becomes difficult, and production cost increases
Solution Approach 1:
The patent applies local quality by using metal only for the reinforcing ring where high temperature and pressure resistance is critical, rather than making the entire container from metal. This localized metal application provides the necessary thermal and pressure resistance at stress-critical areas while keeping the overall production cost lower than full metal construction.
Solution Approach 2:
The patent uses composite materials combining synthetic resin and metal, where the synthetic resin container provides corrosion resistance and cost benefits, while the metal reinforcing ring provides high temperature and pressure resistance. This composite approach resolves the contradiction by allowing each material to perform where it excels.
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 effectively prevents deformation and cracking of the in-tank filter, ensuring durability and maintaining the fuel pump module's functionality even under high pressure and temperature conditions, including when using biofuels.
Implementation Method 1
the coupled body of the upper and lower containers expanded due to an expansion phenomenon and pressure to thereby generate the crack in the container
Implementation Method 2
the coupled body of the upper and lower containers, which serves as a pressure container, has significant expansion pressure applied thereto
Implementation Method 3
an in-tank filter 5 removing foreign materials included in the fuel
Data Source
AI summary
Provided is an in-tank filter, which is a component of a fuel pump module positioned in a fuel tank of a vehicle, etc., to supply fuel to an engine. The in-tank filter includes: a filter media filtering foreign materials; an upper container made of a synthetic resin material and having a filter media insertion space therein, the filter media insertion space having a filter media inserted thereinto; a lower container made of a synthetic resin material and coupled to the upper container to block a lower portion of the upper container; and a deformation prevention reinforcing ring having a container insertion hole formed therein so as to be closely adhered to an outer side of the upper container when the upper container is inserted thereinto and preventing the upper container inserted into the container insertion hole from expanding.