Cut Valve Float Cone Link Cap Residue Clearance

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Solution Overview

Problem

Conventional cut valves can malfunction due to residues or foreign elements in the fuel vapor passage inlet, leading to fuel tank deformation and leakage.

Innovation Solution

A cut valve design featuring a float, cone, links, and a cap with rods, where the cone intercepts the fuel vapor passage when the fuel level rises, and the links facilitate separation from the passage when the fuel level drops, ensuring the cap can move away from any residue or foreign element.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the float directly mates with the vapor passage inlet for sealing, then sealing is improved, but the structure becomes complex and prone to malfunction

Engineering Contradiction:

Improvesealing performanceVSAvoidvalve structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The valve assembly is segmented into distinct functional modules: float, cone, link, and cap. Each component has a specific function, reducing interdependence and simplifying the overall structure while maintaining sealing effectiveness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The link acts as an intermediary mechanism between the float and the cap. It translates the float's vertical motion into cap movement, enabling indirect control that simplifies the overall structure while maintaining functional reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the cap remains fixed at the vapor passage inlet, then sealing is maintained, but the valve cannot be opened when residue or foreign elements are present

Engineering Contradiction:

Improvesealing performanceVSAvoidvalve opening capability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The cap is designed as a dynamic component that can change position between closed (sealing) and open (clearing) states. The link mechanism enables this dynamic transformation based on operational needs, allowing the valve to adapt to different conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The float provides feedback about fuel level and potential obstructions. When the float rises due to high fuel level or obstruction, it activates the link mechanism to move the cap, creating a feedback loop that automatically responds to operational conditions.

Inventive Principle:

Principle #23Feedback

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

Prevents malfunction by allowing easy opening of the valve even with residues or foreign elements, thereby preventing fuel tank deformation and leakage.

Implementation Method 1

a float 250 moving upward and downward corresponding to a surface of the fuel

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Data Source

PatentUS7607450B2Cut valve

Publication Date: 2009.10.27 KIA CORPORATION

AI summary

A cut valve preventing fuel overflow from a fuel tank to a fuel gas passage includes a float moving upward and downward corresponding to a surface of the fuel, a cone formed to an upper surface of the floater to move with the float, at least one link formed to an upper surface of the float to move with the float, and a cap disposed to intercept a fuel gas passage by a movement of the cone when the surface of the fuel moves upward and comprising at least one rod inserted to the at least one link.