Fuel Pump Pulsation Damper With Modular Diaphragm Units
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Solution Overview
Problem
Existing pulsation dampers face challenges in finely controlling attenuation performance, leading to inefficiencies in manufacturing and difficulties in adjusting pressure pulsation reduction, as they require varying diaphragm sizes and complex diaphragm arrangements.
Innovation Solution
A pulsation damper design featuring a damper unit with a diaphragm and a high-rigidity plate, where the attenuation performance is controlled by adjusting the number of damper units, allowing for precise adjustment of pulsation attenuation without changing diaphragm size or form, and incorporating a spacer to maintain spacing and facilitate assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diaphragm size is increased to improve attenuation performance, then the attenuation performance is improved, but the device size increases and manufacturing efficiency decreases
Solution Approach 1:
The pulsation damper is divided into multiple damper units, each containing a diaphragm. By segmenting the attenuation function into multiple identical units, the system achieves flexible scalability - attenuation performance can be adjusted by changing the number of units rather than redesigning diaphragm sizes, thus improving manufacturing efficiency while maintaining reliability
Solution Approach 2:
Instead of changing diaphragm physical dimensions to adjust attenuation performance, the invention changes the numerical parameter of damper unit quantity. This parameter change approach allows precise control of attenuation performance through simple numerical adjustment (number of units) rather than complex geometric redesign, improving both manufacturing efficiency and performance tunability
2Reliability
If different sized diaphragms are prepared to control attenuation performance, then the attenuation performance can be adjusted, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The system uses multiple identical diaphragm units instead of one complex diaphragm with varying sizes. Each unit contains a standard diaphragm, and the total attenuation performance is controlled by the number of identical units assembled, significantly reducing device complexity and inventory requirements
Solution Approach 2:
A single standardized diaphragm design serves multiple functions across different attenuation performance requirements. The same diaphragm unit can be used in various configurations (1 unit, 2 units, 3 units, etc.) to achieve different attenuation levels, making the diaphragm universally applicable and eliminating the need for multiple specialized designs
3Reliability
If multiple diaphragms are arranged in one fuel chamber, then the attenuation performance can be adjusted, but the assembly complexity increases
Solution Approach 1:
The damper assembly is segmented into independent, pre-assembled damper units. Each unit is a self-contained module with a diaphragm and associated components. This segmentation allows for simple, repeatable assembly procedures where identical units are stacked or arranged in the fuel chamber, reducing assembly complexity compared to installing multiple individual diaphragms
Solution Approach 2:
Multiple damper units are nested or stacked within the fuel chamber in a hierarchical arrangement. The modular units can be nested together efficiently, allowing for compact packaging and simplified assembly where units are added in sequence rather than requiring complex positioning of individual diaphragm components
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 design enables precise control of pulsation attenuation, improves manufacturing efficiency by eliminating the need for multiple diaphragm sizes, and reduces noise and wear in fuel pump systems by effectively managing pressure pulsations.
Implementation Method 1
a diaphragm that is elastically deformed by receiving pressure of fuel
Implementation Method 2
A gas chamber is defined between the diaphragm and the plate joined with each other
Data Source
AI summary
A pulsation damper includes: a case in which a fuel chamber is defined; and a damper unit arranged in the fuel chamber to attenuate pressure pulsation of fuel. The damper unit has a diaphragm that is elastically deformed by receiving pressure of fuel, and a plate having a rigidity higher than that of the diaphragm. A gas chamber is defined between the diaphragm and the plate joined with each other.