Fuel Pump Fastening Section for Secure Screw Retention
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Solution Overview
Problem
Existing fuel pump mounting systems face challenges in securely fastening the fuel pump to a base during transport and installation, as the fasteners can be easily dislodged due to applied forces or torque, leading to potential misalignment and instability during mounting.
Innovation Solution
The fuel pump incorporates a fastening section with radially inward projections in the through openings, which securely hold the holding element and fastener in place, preventing axial displacement and ensuring a reliable interlocking connection between the holding element and the fastening section, even during torque applications, by utilizing a press fit and additional projections for enhanced grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a press fit holding element is used in the through opening, then the fastener can be easily inserted during mounting, but the holding element and fastener can be pushed out during transport and storage
Solution Approach 1:
The projection is formed in advance on the fastening section before the holding element is inserted. This preliminary structural feature creates a mechanical stop that prevents the holding element from being pushed out during transport and storage, while still allowing easy insertion during mounting operations.
Solution Approach 2:
The projection acts as an intermediary mechanical feature between the fastening section and the holding element. It provides a physical barrier that secures the holding element in place during transport, while not interfering with the ease of insertion during mounting operations.
2Reliability
If the holding element is securely held in the through opening, then slipping is prevented during transport, but clamping of the holding element between the fastener and base is restricted
Solution Approach 1:
The projection is located specifically in an end region of the through opening, providing localized securing in that area while leaving other regions of the through opening free to accommodate the clamping action during mounting. This localized approach prevents slipping during transport without restricting the clamping operation.
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 solution enhances the securement of the fuel pump during transport and installation, preventing slipping and ensuring easier, more reliable mounting by creating a stable clamping effect between the fastener and the base, thereby simplifying and ensuring the final mounting process.
Implementation Method 1
The holding element is usually held with a press fit in the through opening
Data Source
AI summary
A fuel pump for a fuel injection system of an internal combustion engine includes a pump housing and a fastening section which is present on the pump housing for fastening the fuel pump to a base, in particular an engine block. The fastening section has a through opening for receiving a holding element for a fastening means, in particular a screw. At least one radially inwardly directed projection is present at least in an end region of the through opening, the end region facing the base in the installed position.