Valve Assembly Diaphragm Pressure Equalization
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Solution Overview
Problem
Current tire inflation systems lack efficient mechanisms for equalizing fluid pressures across multiple ports, leading to issues with over-inflation and under-inflation, and do not effectively manage pressure differentials to prevent environmental contamination and fluid loss.
Innovation Solution
A valve assembly comprising a diaphragm and one-way valves, specifically elastomeric duck-bill or o-ring valves, that allow pressurized fluid to flow between fluid chambers and ports while preventing backflow, with a relief mechanism to vent excess pressure and maintain pressure equality within ±2 psi across ports and chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a valve assembly uses simple inflation/deflation mechanisms, then the device complexity is reduced, but the ability to maintain precise pressure equality (±2 psi) across multiple ports deteriorates
Solution Approach 1:
The valve assembly is divided into multiple independent fluid chambers (first fluid chamber, second fluid chamber, third fluid chamber) each connected to different ports, with individual one-way valves controlling flow to each chamber. This segmentation allows independent pressure management while maintaining overall system simplicity.
Solution Approach 2:
One-way valves act as intermediaries between the fluid source and the fluid chambers, automatically regulating pressure flow direction and preventing backflow. This mediator mechanism enables precise pressure equality control without complex active control systems.
2Ease of operation
If the valve assembly allows free fluid flow between chambers, then the ease of operation is improved, but the reliability deteriorates due to over-inflation and under-inflation issues
Solution Approach 1:
One-way valves are installed to preemptively prevent harmful backflow before it can cause over-inflation or under-inflation problems. The valves allow fluid to flow in the correct direction while automatically blocking reverse flow, ensuring reliable pressure management.
Solution Approach 2:
The one-way valves provide self-regulating flow control without requiring external control mechanisms. The valves automatically respond to pressure differentials, allowing fluid flow when needed and blocking it when pressure equality is achieved, improving both ease of operation and reliability.
3Device complexity
If the valve assembly lacks pressure differential management, then the device complexity is reduced, but the loss of substance increases due to environmental contamination and fluid loss
Solution Approach 1:
One-way valves serve as intermediaries that prevent fluid leakage and environmental contamination by blocking reverse flow. These valves ensure that fluid remains contained within the proper chambers and ports, preventing loss of substance while maintaining relatively simple device architecture.
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 solution ensures efficient inflation and deflation of tires by maintaining pressure equality, preventing over-inflation, and effectively managing pressure differentials to maintain optimal tire pressure while minimizing environmental contamination and fluid loss.
Implementation Method 1
A first one-way valve may be disposed in the first fluid channel so as to allow the pressurizing fluid to flow from the first fluid chamber to the second fluid chamber. A second one-way valve may be disposed in the second fluid channel so as to allow the pressurizing fluid to flow from the first fluid chamber to the third fluid chamber.
Implementation Method 2
A third fluid channel may be in fluid communication with the second fluid chamber and the vent. The third fluid channel may be closable by movement of the diaphragm from a closed position to an open position.
Implementation Method 3
A relief mechanism to vent excess pressure and maintain pressure equality within ±2 psi across ports and chambers
Data Source
Figure 1~2
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Figure 5~6
AI summary
A valve assembly may have an inlet configured to receive pressurized fluid, a first port, a diaphragm comprising a first side and an opposing second side, a first one-way valve disposed so as to allow fluid to flow from the inlet to the first side of the diaphragm, and a second one-way valve disposed so as to allow fluid to flow from the inlet to the first port. The first side of the diaphragm may be in fluid communication with the first port and with atmosphere, and the second side may be in fluid communication with the first one-way valve, the diaphragm sealing the first port from the first one-way valve and from atmosphere, such that when fluid pressure in the first port exceeds the fluid pressure at the first valve, the diaphragm may flex to allow fluid to flow from the first port to atmosphere.