Fuel Tank Valve Tilt Correction Guide Mechanism
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Solution Overview
Problem
Existing fuel tank valve devices face challenges in efficiently seating the valve body with minimal force when the float body is raised and in responsive opening of the ventilation path when the liquid level decreases, due to increased force requirements and difficulty in unblocking the valve under high pressure conditions.
Innovation Solution
A fuel tank valve device with a float body and valve body designed to move along a central axis, featuring guide means to correct tilt and engage/disengage for minimal force seating and responsive opening, and additional engaging portions for efficient movement and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve member is supported by the projection and the float ascends, then the valve member can be seated on the seat portion, but the force required for seating excessively increases when the valve member inclines
Solution Approach 1:
The patent introduces a guide member as an intermediary component between the float and the valve member. The guide member's inclined surface guides the valve member during the seating process, ensuring proper alignment and reducing the force required. This mediator prevents direct contact between the float and valve member, eliminating the excessive force problem while maintaining reliable seating.
Solution Approach 2:
The patent replaces the direct mechanical support system (float projection supporting valve member) with a guided mechanical system. The guide member substitutes the direct support function with a guidance function, using an inclined surface to redirect forces and achieve proper valve seating with reduced force requirements.
2Productivity
If the float descends to unblock the ventilation path, then the valve member should be pulled away from the seat portion, but it is difficult to unblock responsively under high pressure conditions
Solution Approach 1:
The guide member acts as a mediator that facilitates the unseating process. During descent, the guide member's inclined surface provides a mechanical advantage, allowing the float to pull the valve member away from the seat with minimal force. This intermediary mechanism overcomes high pressure conditions by converting the float's downward motion into an effective unseating force.
Solution Approach 2:
The patent introduces dynamic elements including a spring mechanism that stores and releases energy during the valve's operation. The spring assists in rapidly unseating the valve during float descent, providing the necessary force to overcome high pressure conditions and achieve responsive ventilation path opening.
3Ease of operation
If the valve body and float body are combined with engaging portions, then the valve body can move along the central axis efficiently, but the structure becomes more complex
Solution Approach 1:
The patent divides the engagement system into distinct segments: engaging portions on the float, corresponding engaged portions on the valve body, and the guide member. This segmentation allows each component to perform its specific function independently, improving the efficiency of valve body movement along the central axis while keeping the overall structure manageable through modular design.
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
Enables the valve body to be seated with minimal force correction and the ventilation path to open responsively, even under high pressure conditions, ensuring effective fuel tank ventilation.
Implementation Method 1
a float body (1) provided with a valve body (3) on the upper part
Data Source
AI summary
A valve body and a float body are coupled so that the valve body is allowed to move in a direction along a central axis of movement of the float body, and the seated valve body is unseated when the float body descends. On a central axis side of the movement of the float body, a pair of guide members is provided, and when the valve body tilts, the valve body and the float body contact each other on a lower side of a tilt of the valve body and the float body ascends, so that the guide members correct the tilt. Also, when the float body ascends, the float body and the valve body do not contact each other in a rest of a portion.