Fixing Sleeve for Injector Plug Vibration Control
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Solution Overview
Problem
Vibrational loading in internal combustion engines causes relative movement between plug and injector, leading to abrasion, dust deposition, and premature failure of plug contacts, resulting in electrical interruptions and misfires.
Innovation Solution
A fixing sleeve with two half-shells and a fastener that minimizes relative movement by securely attaching the plug to a socket, using a projection or receptacle for engagement and a hinge for easy mounting, which reduces wear and prevents movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plug is directly connected to a socket without a fixing sleeve, then the device complexity is reduced, but the reliability deteriorates due to vibrational loading causing relative movement and abrasion
Solution Approach 1:
A fixing sleeve is introduced as an intermediary component between the plug and socket. The sleeve has a receiving space that accommodates the plug and a fastener that engages with the socket, thereby mediating the connection and preventing direct relative movement between plug and socket that causes abrasion
Solution Approach 2:
The fixing sleeve is divided into two half-shells that can be separately assembled around the plug. This segmentation allows for easier installation and assembly while maintaining the overall function of securing the plug to the socket
2Ease of operation
If the projection extends beyond the face side for tolerance compensation, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The projection is designed with a guide surface that has a specific inclination angle, allowing it to dynamically adapt during insertion. The projection can assume different positions and orientations during the insertion process, facilitating easier operation while the underlying structure remains relatively simple
Data Source
AI summary
A fixing sleeve firmly fixes a plug to a socket. The fixing sleeve has two half-shells, which delimit a receiving space for receiving at least one part of the plug. A fastener is arranged adjacently to a plug-side end face of the fixing sleeve. An injector assembly includes an injector with a socket, a cable fastened to the plug, and the fixing sleeve.