Smooth Neck Fuel Additive Bottle for Capless Filler Systems
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Solution Overview
Problem
Existing fuel and additive treatment containers are incompatible with capless filler systems, as their external threads get caught in the flapper seals, preventing them from being retracted after insertion into a vehicle's fuel tank.
Innovation Solution
A bottle with an elongated smooth neck and internal threads at the top portion, designed for easy insertion and extraction from capless filler systems, allowing the bottle to actuate and displace flapper seals for fluid dispensing, and featuring a child-proof cap for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing fuel containers with external threads are used, then the container can be easily manufactured and sealed, but the external threads get caught in the flapper seals preventing retraction from the capless filler
Solution Approach 1:
The external threads are extracted from the bottle neck and relocated to the interior surface of the cap. This allows the bottle neck to have a smooth external surface that can pass through the flapper seals without obstruction, while the threading function is preserved through the internal threads on the cap that engage with the bottle's rim.
Solution Approach 2:
Instead of having threads on the outside of the bottle neck (conventional approach), the threading is inverted to be on the inside of the cap. This reversal allows the bottle to slide smoothly through the filler seal while the cap provides the threading interface for sealing.
2Ease of operation
If the bottle neck is made smooth for easy insertion, then the flapper seals can close properly, but the bottle cannot be securely sealed without external threads
Solution Approach 1:
The cap acts as an intermediary component that provides the threading interface. The smooth bottle neck inserts through the flapper seal, and the cap with internal threads engages with the bottle's rim to provide secure sealing, separating the insertion function from the sealing function.
Solution Approach 2:
The sealing and threading functions are segmented from the bottle neck and transferred to the cap. The bottle neck is simplified to provide only the insertion interface, while the cap provides both the sealing interface (through its engagement with the bottle rim) and the threading interface (through internal threads).
3Reliability
If a traditional screw cap is used, then the bottle can be securely sealed, but the cap cannot be actuated by the flapper seal mechanism in a capless filler system
Solution Approach 1:
The cap is designed to serve multiple functions: it provides the traditional sealing function by engaging with the bottle rim, provides the threading function through internal threads for secure attachment, and enables compatibility with capless fillers by having a smooth profile that allows flapper seal actuation. The elongated neck design allows the cap to be pushed down by the flapper seal to break the seal and enable fuel flow.
Data Source
AI summary
A bottle for dispensing fluids into a capless filler system, the bottle configured with an elongated smooth neck designed for insertion into a capless filler opening to actuate and displace one or more flapper seals when emptying the fluid into the capless filler. The bottle is sealed with a cap with a first set of screw threads that engages the neck at a top portion with a second set of screw threads on an interior surface of the top portion of the neck. The cap can be a child proof cap. The bottle can be made of plastic that is clear or opaque.