Segmented Flange Fastening for High-Pressure Fuel Pumps
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Solution Overview
Problem
High pressure fuel pumps are inflexible in their fastening to cylinder heads or engine blocks due to fixed flanges, limiting their installation orientation and adaptability to varying installation spaces.
Innovation Solution
A high pressure fuel pump design featuring a separable flange with overlapping parts that can be oriented freely, providing secure fastening and stability without the need for welding, allowing for flexible attachment to different cylinder heads or engine blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed flange is used for fastening the high pressure fuel pump, then the fastening stability is improved, but the adaptability to different installation spaces deteriorates
Solution Approach 1:
The flange is divided into multiple separate flange parts (typically two) that can be independently positioned and oriented. Each flange part engages around a portion of the housing circumference, allowing the pump to be installed in different orientations while maintaining secure fastening through the combined action of all flange parts.
2Strength
If a welded seam is used to fasten the flange to the housing, then the fastening strength is improved, but the manufacturing complexity and production time deteriorates
Solution Approach 1:
The welded seam connection is replaced with a mechanical fastening system using flange parts that engage around the housing and are secured with fastening elements such as bolts or clips. This substitution eliminates the need for welding operations while maintaining sufficient fastening strength through mechanical interlocking.
3Strength
If a welded seam is used to fasten the flange to the housing, then the fastening strength is improved, but the device complexity deteriorates
Solution Approach 1:
The flange is segmented into multiple independent parts that can be separately manufactured and assembled. This segmentation simplifies the manufacturing process for each individual flange part while the collective arrangement of multiple parts provides the necessary fastening strength, thereby reducing overall device complexity compared to a single welded flange structure.
4Force
If the flange is fixed firmly on the housing, then the holding down function is improved, but the reorientation capability deteriorates
Solution Approach 1:
The flange configuration transitions from a fixed, rigid structure to a dynamic, adjustable arrangement where multiple flange parts can be independently positioned. This allows the pump to be reoriented during installation while the flange parts collectively provide sufficient holding down force to secure the pump in its final position.
Data Source
AI summary
The invention relates to a high pressure fuel pump (10) comprising a housing (12) and a flange (14) by means of which the housing (12) can be fastened to an engine block or cylinder head, the flange (14) being formed of at least two flange parts (26) that are separate from the housing (12) and are separated from each other, and that overlap mutually in the fastened state of the housing (12).