Angled Fuel Pump Connection Piece for Leak-Stable Installation
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Solution Overview
Problem
Existing fuel systems with high-pressure fuel pumps face challenges in flexible spatial arrangement and alignment with high-pressure areas, leading to potential leaks and strain on connections due to transverse forces, which can affect the service life and fluid mechanical stability.
Innovation Solution
A connecting piece with non-axial, unequal opening axes and a widening cross-section is used to facilitate flexible positioning of the high-pressure fuel pump relative to the high-pressure area, reducing transverse forces and ensuring a fluid-tight connection, which can be achieved through a one-piece base body or separate elements connected via screws or welds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a coaxial connection fitting is used, then the connection is simple and aligned, but the spatial flexibility for positioning the high-pressure fuel pump relative to the high-pressure area is limited
Solution Approach 1:
The connection fitting employs non-coaxial opening axes where the first opening axis and second opening axis are arranged at an angle to each other (specifically 90 degrees in the embodiment). This asymmetric geometric configuration enables the fitting to bridge offset or transverse orientations between the high-pressure fuel pump outlet and the high-pressure area connection points, thereby achieving flexible spatial positioning while maintaining a simple single-piece structure
2Adaptability or versatility
If the opening axes are arranged non-coaxially, then spatial flexibility is improved, but lateral forces may cause leakage or thread deformation over time
Solution Approach 1:
The connection fitting is designed with the first and second opening axes lying in the same plane, creating a balanced geometric configuration. This planar arrangement ensures that lateral forces acting on the connection are distributed symmetrically, preventing unilateral stress concentration that could lead to leakage or thread deformation. The design maintains force equilibrium while accommodating non-coaxial spatial requirements
3Ease of manufacture
If a one-piece base body is used, then manufacturing is simplified and cost-effective, but the ability to accommodate complex non-coaxial positioning may be limited
Solution Approach 1:
The connection fitting utilizes three-dimensional spatial geometry with non-coaxial opening axes arranged at an angle (90 degrees in the embodiment) within a single piece structure. This dimensional approach allows the fitting to accommodate complex spatial relationships between pump outlet and high-pressure area connections without requiring multiple assembled components, achieving both manufacturing simplicity and positioning flexibility through clever geometric design
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a connection piece (22) for connecting an outlet of a high-pressure fuel pump (16) to a high-pressure region (18) of a fuel system (10) in an internal combustion engine.