Fuel Pump Cover Ring Locking for Secure Service Access
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Solution Overview
Problem
The conventional fuel pump cover design in internal combustion engines often leaves the fuel pump exposed due to recessed areas in the fuel tank, making it difficult to access and maintain the fuel pump effectively.
Innovation Solution
A fuel pump cover apparatus comprising a lock ring, a cover ring with spring retainers and clipping devices, and a removable cover, which securely attaches to the fuel pump assembly using retaining members and snap lock retainers, ensuring secure closure and easy access for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the fuel pump is placed in a recessed area of the fuel tank, then the fuel pump is protected from external access, but it becomes difficult to approach and maintain the fuel pump
Solution Approach 1:
The cover assembly is divided into separate components: a cover body, a cover ring with clipping devices, and retaining members. This segmentation allows the cover to be easily assembled and disassembled for maintenance while maintaining protection when closed.
Solution Approach 2:
The cover ring incorporates spring retainers that provide dynamic locking and unlocking functionality. The spring mechanism allows the cover to be securely locked during normal operation but easily released when maintenance is needed, transitioning between protected and accessible states.
2Object-affected harmful factors
If a secure cover is installed to protect the fuel pump, then unauthorized access is restricted, but the complexity of the device increases
Solution Approach 1:
Multiple functions are merged into the cover ring component: it serves as the main cover structure, incorporates clipping devices for attachment, includes spring retainers for locking, and provides retaining member guides. This consolidation reduces the number of separate parts while maintaining comprehensive protection functionality.
Solution Approach 2:
The cover ring performs multiple functions simultaneously: it covers the fuel pump assembly, secures the cover body, provides locking mechanism support, and guides retaining members. This multi-functionality reduces overall device complexity by eliminating the need for separate components for each function.
3Reliability
If the cover is permanently fixed to protect the fuel pump, then security is improved, but maintenance access becomes difficult
Solution Approach 1:
The spring retainers are pre-loaded into the cover ring with built-in tension, creating a preliminary locking force that secures the cover without requiring additional fastening steps. This preliminary action ensures security while maintaining ease of release through simple rotational movement.
Solution Approach 2:
Instead of requiring force to maintain security, the design uses spring tension that naturally maintains the locked state. The security mechanism works in reverse: normal positioning provides security, while deliberate rotational movement releases it, inverting the typical lock-unlock paradigm.
4Reliability
If multiple retaining mechanisms are used to secure the cover, then reliability is improved, but the ease of operation decreases
Solution Approach 1:
The spring retainers are self-actuating: as the cover ring is rotated onto the fuel pump assembly, the spring mechanism automatically engages with the locking surfaces and secures the cover. No additional manual fastening or tool operation is required, making the process simple despite the complex-looking retention mechanism.
Solution Approach 2:
The design replaces complex multi-step mechanical fastening systems with a simplified rotational engagement mechanism. The spring retainers convert rotational motion into automatic locking action, substituting for multiple separate fastening operations and maintaining simplicity while ensuring reliable attachment.
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
The apparatus effectively restricts unauthorized access to the fuel pump while allowing for easy maintenance by providing a secure and removable cover that can be locked and unlocked with a position indicator, ensuring the fuel pump assembly is protected and accessible as needed.
Implementation Method 1
a plurality of spring retainers disposed under the cover ring to apply pressure between the cover ring and the fuel pump assembly
Data Source
AI summary
A fuel pump cover apparatus includes a fuel pump assembly configured to be attached to a fuel tank, and a lock ring disposed on the fuel pump assembly configured to fix the fuel pump assembly to the fuel tank and having a plurality of slots. A cover ring is placed over the lock ring and includes a plurality of clipping devices disposed under the cover ring to be attached to the slots of the lock ring, and spring retainers disposed under the cover ring to apply pressure between the cover ring and the fuel pump assembly. A cover is disposed over the cover ring to cover the fuel pump assembly, and a plurality of retaining members is arranged between the cover and the cover ring to removably attach the cover to the cover ring.