Fuel Pump Module Vibration Damping via Filter Mass Coupling
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Solution Overview
Problem
Existing fuel pump modules fail to effectively reduce noise generated by abnormal vibration due to harmonic vibration acceleration, as damping using rubber materials often results in incomplete noise reduction when the harmonic vibration coincides with the resonant band of the module.
Innovation Solution
The fuel pump module incorporates a design where the fuel pump is physically coupled to the intank filter and primary filter to increase mass, positioning the harmonic vibration within a unique vibration area and reducing clearance between filter assemblies to dampen vibrations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vibration is damped using rubber material, then frequency vibration of the fuel pump is reduced, but noise due to abnormal vibration such as resonance is not reduced when harmonic vibration acceleration coincides with resonant band
Solution Approach 1:
The fuel pump is physically coupled to the intank filter assembly, merging two components into a combined structure. This increases the overall mass of the vibration system, which shifts the resonant frequency and prevents the fuel pump's harmonic vibration from coinciding with the resonant band, thereby eliminating abnormal vibration noise that rubber damping alone cannot prevent
Solution Approach 2:
The invention changes the mass parameter of the fuel pump assembly by integrating it with the intank filter assembly. This parameter change modifies the vibrational characteristics and resonant frequency of the system, ensuring that the fuel pump's operating frequencies do not coincide with resonant frequencies, thus preventing resonance-induced noise
2Object-affected harmful factors
If the fuel pump is physically coupled to the intank filter and primary filter to increase mass, then harmonic vibration is positioned within unique vibration area, but the structure becomes more complex
Solution Approach 1:
The fuel pump is integrated with the intank filter assembly, combining two previously separate components into one unified structure. This merger increases the assembly's mass to shift vibrational characteristics while simultaneously reducing the number of separate parts, thereby managing structural complexity through consolidation rather than addition
Solution Approach 2:
The intank filter assembly serves multiple functions: it acts as both a filtration component and a structural mass element for vibration control. By making the filter assembly multi-functional, the invention achieves vibration damping without requiring separate dedicated vibration control components, thus avoiding increased device complexity
3Stability of the object's composition
If a second primary filter fixing part is added to firmly couple the primary filter assembly and intank filter assembly, then clearance is reduced and vibration is dampened, but manufacturing complexity increases
Solution Approach 1:
The fixing mechanism is divided into multiple fixing parts (first and second primary filter fixing parts) that are integrated into the single primary filter assembly. This segmentation allows each fixing part to perform a specific function in reducing clearance at different locations, achieving stable coupling while maintaining manufacturability through modular integration
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
This approach effectively positions the harmonic vibration of the fuel pump within its unique vibration area, thereby reducing noise in the fuel tank caused by abnormal vibrations of the fuel pump module, while also preventing vibration transfer through firm contact between filter assemblies.
Implementation Method 1
a fuel pump, which is a vibration body, is physically coupled to an intank filter, a primary filter, and the like, which are other components of the fuel pump module, to have increased mass, such that unique harmonic acceleration of the fuel pump is reduced
Implementation Method 2
a unique vibration area of the fuel pump or the fuel pump module is changed, and harmonic vibration of the fuel pump is thus positioned at the unique vibration area of the fuel pump or the fuel pump module
Implementation Method 3
vibration of the fuel pump is damped using a rubber material to prevent the vibration of the fuel pump from being transferred to the fuel pump module
Implementation Method 4
a second primary filter fixing part is additionally formed in a primary filter assembly to firmly couple the primary filter assembly and an intank filter assembly to each other, such that a clearance between the primary filter assembly and the intank filter assembly is reduced, thereby making it possible to damp vibration of the fuel pump module
Data Source
AI summary
Provided is a fuel pump module for a vehicle in which a fuel pump, which is a vibration body, is physically coupled to an intank filter, a primary filter, and the like, which are other components of the fuel pump module, to have increased mass, such that unique harmonic acceleration of the fuel pump is reduced, a unique vibration area of the fuel pump or the fuel pump module is changed, and harmonic vibration of the fuel pump is thus positioned at the unique vibration area of the fuel pump or the fuel pump module, thereby making it possible to remove noise generated in a fuel tank due to abnormal vibration of the fuel pump module.