Fuel Vapor Valve Liquid Trap Insert
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Solution Overview
Problem
Existing fuel vapor valves face challenges in achieving zero leakage, requiring extensive modifications or additional development time and cost, especially when dealing with liquid fuel leaks past the valve seat.
Innovation Solution
A simple insert comprising a tube and skirt is designed to form a reservoir within the fuel vapor valve, trapping liquid fuel and preventing further leakage by sealing against the valve's inner wall or top portion, which can be easily retrofitted into existing valves without structural changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing fuel vapor valves are redesigned to meet zero leakage requirements, then leakage is reduced, but development time and cost increase
Solution Approach 1:
The invention divides the leak prevention function into a separate, modular insert component that can be independently designed and installed within the existing valve body. This segmentation allows the leak prevention mechanism to be developed and tested separately, reducing overall development time while achieving zero leakage performance.
Solution Approach 2:
The insert acts as an intermediary component between the existing valve seat and the fuel vapor flow. It provides an additional sealing interface and liquid fuel containment mechanism without requiring modifications to the original valve structure, thereby preventing leakage while avoiding extensive redesign.
2Reliability
If existing fuel vapor valves are redesigned to meet zero leakage requirements, then leakage is reduced, but development cost increases
Solution Approach 1:
By segmenting the leak prevention function into a separate insert, the invention allows manufacturers to produce the insert independently using simpler, more cost-effective processes. This modular approach reduces tooling costs and enables economies of scale, lowering overall development cost compared to complete valve redesign.
Solution Approach 2:
The insert is designed as a relatively simple, inexpensive component that can be easily manufactured and replaced if necessary. Its simplified structure reduces material and manufacturing costs compared to redesigning the entire valve assembly, making zero leakage achievement more cost-effective.
3Reliability
If a liquid trap insert is added to the fuel vapor valve, then leakage is reduced, but device complexity increases
Solution Approach 1:
The insert is nested within the existing valve body, utilizing the available internal space without requiring external modifications. This nesting approach adds the liquid trap functionality while maintaining a compact overall structure, minimizing the increase in device complexity.
Solution Approach 2:
The insert is designed to perform multiple functions: trapping liquid fuel, providing an additional sealing interface, and directing vapor flow. By consolidating these functions into a single component, the invention reduces the need for additional separate parts, thereby limiting the increase in device complexity.
4Reliability
If the valve structure is extensively modified to prevent leakage, then leakage is reduced, but adaptability to existing valves decreases
Solution Approach 1:
The insert serves as an intermediary that interfaces with standard valve features without requiring structural modifications to existing valves. Its design accommodates various valve configurations, maintaining adaptability and versatility across different valve types while achieving leak prevention.
Solution Approach 2:
The insert is designed with universal features that allow it to be adapted to different valve configurations and orientations. Its flexible design maintains compatibility with existing valves across various applications, preserving adaptability while providing enhanced leak prevention performance.
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 insert effectively reduces liquid fuel leakage, making the valve virtually leakproof and adaptable for various applications, including high and low flow scenarios, while minimizing development time and cost.
Implementation Method 1
The skirt seals against a portion of the fuel vapor valve, such as against an inner wall of a valve port or on a top portion of the valve to act as a valve cap
Data Source
AI summary
An insert for a fuel vapor valve traps liquid fuel and prevent the fuel from leaking out of the valve. The insert includes a tube and a skirt disposed around the tube. The skirt seals against a portion of the fuel vapor valve, such as against an inner wall of a valve port or on a top portion of the valve to act as a valve cap. The tube and the skirt cooperate with the fuel vapor valve to form a reservoir that traps fuel.