Wheel Valve Assembly Venting for Contamination-Resistant Pressure Control
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Solution Overview
Problem
Conventional wheel valves for tire inflation/deflation systems are susceptible to environmental factors and contamination, leading to unreliable control of fluid pressure.
Innovation Solution
A wheel valve assembly with a fluid-operated damper and vent passage, featuring a resilient fluid pressure-energized valve element and multiple vent valves, which maintains desired pressure levels and reduces contamination by allowing excess fluid to escape, thereby improving timing control and sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional wheel valve is used in a tire inflation/deflation system, then the system can operate with a single fluid flow line, but the valve control becomes unreliable due to environmental factors and contamination
Solution Approach 1:
The wheel valve assembly is segmented into multiple functional components: a valve body with inlet/outlet ports, a diaphragm-style valve element, a fluid-operated damper with vent passage, and a resilient valve element. This segmentation allows each component to perform its specific function independently, improving overall reliability while maintaining operation with a single fluid flow line
Solution Approach 2:
A resilient valve element acts as an intermediary component that enhances sealing performance and prevents contamination from directly affecting the main valve control mechanism. The fluid-operated damper with vent passage serves as another intermediary that mediates pressure control, allowing the valve to maintain reliable operation despite environmental factors
2Reliability
If fluid pressure in the damper chamber increases due to leakage, then the valve member timing changes, but the vent passage allows fluid to escape to maintain desired pressure level
Solution Approach 1:
The vent passage is designed to automatically regulate damper chamber pressure without external intervention. When fluid leaks into the damper chamber and pressure increases, the vent passage allows fluid to escape automatically, maintaining the desired pressure level and valve member timing through self-regulating pressure management
Solution Approach 2:
The vent passage changes the pressure parameter in the damper chamber by allowing fluid to escape when pressure exceeds the desired level. This dynamic parameter adjustment ensures consistent valve member timing despite variations in fluid leakage conditions
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 enhances the reliability and durability of the wheel valve assembly by maintaining consistent pressure control and preventing immediate closure, even in the presence of contaminants, while operating with a single fluid flow line.
Implementation Method 1
The resilient valve element may be activated to open the vent passage when a pressure differential on opposite sides of the resilient valve element reaches or exceeds a certain level
Implementation Method 2
a fluid-operated damper that is configured to control the timing of a valve member of the wheel valve assembly
Data Source
AI summary
A valve assembly for a tire inflation/deflation system includes a body having a control port and a tire port, and a valve member for fluidly connecting or disconnecting the control port with the tire port. In one embodiment, the valve includes a fluid-operated damper having a damper chamber for controlling a timing of the valve member. A vent valve is provided for permitting excess fluid pressure to escape from the damper chamber. In another embodiment, the valve member includes a diaphragm separating first and second fluid chambers. A vent passage and at least one resilient fluid pressure-operated valve element are provided for enabling fluid to vent from the first chamber to the second chamber. Multiple-redundant valve elements may be provided to form an isolation gap that restricts contamination of the valve assembly.