High-Pressure Fuel Pump Damper Assembly Simplified Welding
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Solution Overview
Problem
Conventional damper assemblies for high-pressure fuel pumps require a large installation space and incur high manufacturing costs due to their complex structure, which includes separate parts like retainer rings and damper springs to support the damper.
Innovation Solution
A damper assembly with a simplified structure featuring upper and lower bodies with flange portions, a retainer ring with a curved support portion, and a cover member that surrounds the damper and retainer ring, where welding portions are formed to fix the damper in the housing, reducing the need for multiple parts and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate parts like retainer ring and damper spring are used to support the damper, then the damper can be supported stably, but the installation space increases and manufacturing costs increase
Solution Approach 1:
The patent combines the retainer ring and damper spring into a single integrated retainer ring structure. The retainer ring includes both the support function (replacing the spring) and the retention function (replacing the separate retainer ring), thereby reducing the number of parts and simplifying the assembly structure while maintaining damper support stability
Solution Approach 2:
The retainer ring is designed to perform multiple functions simultaneously: it provides mechanical support for the damper, retains the damper in position, and eliminates the need for separate spring and retainer ring components. This multi-functional design reduces assembly complexity and installation space
2Reliability
If separate parts like retainer ring and damper spring are used to support the damper, then the damper can be supported stably, but the manufacturing costs increase due to increased number of parts
Solution Approach 1:
The patent combines the retainer ring and damper spring into a single integrated retainer ring structure. The retainer ring includes both the support function (replacing the spring) and the retention function (replacing the separate retainer ring), thereby reducing the number of parts and simplifying the assembly structure while maintaining damper support stability
Solution Approach 2:
The patent eliminates the need for separate retainer ring and damper spring parts by integrating their functions into a single component, thereby reducing part count, manufacturing complexity, and overall manufacturing cost while maintaining the required support stability
Data Source
AI summary
A damper assembly of a high-pressure fuel pump for reducing fuel pulsation, which is capable of reducing the pulsation of a fuel transferred to the high-pressure fuel pump to stabilize the supply of the fuel, having a simplified structure to minimize an installation space and curtailing manufacturing costs, is provided. The damper assembly of the high-pressure fuel pump includes a damper including upper and lower bodies having flange portions formed along a circumference thereof to face each other in a vertical direction, a retainer ring including a curved portion configured to support the damper and a support portion extending from the curved portion in a longitudinal direction, and a cover member configured to surround the damper and the retainer ring. Here, the damper is fixed in a housing as the flange portion of the upper body, the flange portion of the lower body and the curved portion of the retainer ring are welded at welding portions at the same time.