Refueling Nozzle Guide with Deformable Stopper
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Solution Overview
Problem
Existing refueling port structures experience damage due to the forceful impact of a refueling nozzle hitting stoppers in the nozzle guide, as the inward projections act as stoppers and impede further insertion, leading to shock and potential damage.
Innovation Solution
A refueling portion structure with a nozzle guide that includes a stopper and a movement permitting section, which deforms to allow the stopper to move radially or towards the fuel tank side when pushed by the refueling nozzle, increasing contact time and reducing the shock by distributing the force over a longer period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stopper is made fixed at the nozzle guide, then the refueling nozzle insertion is limited to a predetermined range, but the shock damage occurs when the refueling nozzle hits the stopper forcefully
Solution Approach 1:
The stopper is designed to move dynamically within the nozzle guide when subjected to impact force from the refueling nozzle. The movement amount is controlled to be within 1mm, allowing the stopper to absorb shock while still limiting insertion depth. This dynamic behavior resolves the contradiction by making the stopper both a reliable shock absorber and an effective insertion limiter.
Solution Approach 2:
The stopper's position parameter is changed from fixed to movable within a controlled range. By allowing the stopper to move 1mm or less upon impact, the system changes the physical state from rigid to compliant, reducing shock damage while maintaining insertion control functionality.
2Object-affected harmful factors
If the stopper moves when hit by the refueling nozzle, then the shock is mitigated by increasing contact time, but the insertion limitation function may be compromised
Solution Approach 1:
The stopper is designed with controlled movement capability (1mm or less) that activates only under impact conditions. This dynamic response increases contact time during shock events to mitigate harmful forces, while the limited movement range ensures that normal insertion depth control precision is maintained.
Solution Approach 2:
The stopper exhibits different behavioral qualities in different conditions: it remains substantially fixed during normal insertion to maintain precision control, but moves slightly (1mm or less) during impact events to mitigate shock. This local differentiation of mechanical properties resolves the contradiction between shock mitigation and precision control.
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 structure effectively mitigates the shock by allowing the stopper to move radially, reducing the load on the stopper and minimizing damage, while maintaining controlled insertion of the refueling nozzle.
Implementation Method 1
a movement permitting section that is provided at the nozzle guide, and that, when the stopper receives pushing force toward the fuel tank side from the refueling nozzle, deforms so as to permit movement of the stopper toward a radial direction outer side of the nozzle guide or toward the fuel tank side
Data Source
AI summary
A movement permitting section is provided at a nozzle guide 22 at an interior of an inlet pipe 14. When a stopper 24 receives pushing force toward a fuel tank side from a refueling nozzle 18, the movement permitting section deforms so as to permit movement of the stopper 24 toward a radial direction outer side of the nozzle guide 22 or toward a fuel tank side.