Multi-Position Gas Shut-Off Valve for Variable Fuel Flow Control
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Solution Overview
Problem
Existing gas shut-off valves (GSOVs) in fuel trains can only control fuel flow at full open or full closed positions, lacking the ability to variably control the flow rate, which limits engine efficiency and control.
Innovation Solution
A multi-position GSOV system with an electrically controlled actuator and ball valve, controlled by an engine control module (ECM) to adjust the flow rate based on sensor measurements, allowing for flow rates between zero and maximum, enhancing control over fuel flow and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional two-position GSOV is used, then the structure is simple and reliable, but the fuel flow rate cannot be variably controlled
Solution Approach 1:
The patent applies the dynamics principle by transforming the static two-position valve into a dynamic multi-position valve that can assume multiple states (fully closed, partially open at different percentages, fully open). The valve body includes multiple valve seats and corresponding valve elements that can be positioned at different heights, enabling the valve to dynamically adjust fuel flow rates to match varying engine operating conditions while maintaining a relatively simple overall structure
2Ease of operation
If a multi-position GSOV is implemented, then variable fuel flow control is achieved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the valve body into multiple sections with distinct valve seats (first valve seat, second valve seat, etc.) and corresponding valve elements. Each valve element can be positioned independently at different heights relative to its valve seat, creating discrete flow control positions. This segmentation enables precise fuel flow control while keeping each individual valve element simple in structure
Solution Approach 2:
The patent applies parameter changes by varying the opening degree of the valve (0%, 25%, 50%, 75%, 100% etc.) to control fuel flow rate. The valve elements can be positioned at different heights to change the effective flow area, and the system can adjust these parameters dynamically based on engine operating conditions, providing ease of operation without requiring complex external control mechanisms
3Productivity
If full open position is used, then maximum fuel flow is achieved, but fuel leaks and engine startup issues occur
Solution Approach 1:
The patent applies partial action by providing intermediate opening positions (25%, 50%, 75% open) in addition to the fully closed and fully open positions. During engine startup or transient conditions, the valve can be positioned at partial opening levels to provide sufficient but not excessive fuel flow, preventing flooding and startup issues while still meeting engine demands. This eliminates the need to choose between complete closure and full open positions only
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 precise control of fuel flow rates, preventing fuel leaks and engine startup issues, improving engine efficiency and reducing resource waste by allowing variable fuel delivery, thus enhancing the turndown ratio and operational flexibility of the fuel train.
Implementation Method 1
A multi-position GSOV system with an electrically controlled actuator and ball valve
Data Source
AI summary
A multi-position GSOV and control of the multi-position GSOV are disclosed. An example method may include determining a value of a parameter associated with a fuel train, wherein the fuel train is associated with an engine; determining a setting associated with the parameter; and causing, based on the value of the parameter and the setting, a position of a gas shut-off valve (GSOV) of the fuel train to be reconfigured to cause a flow rate of fuel flowing through the GSOV to change from a first flow rate to a second flow rate, wherein the second flow rate is greater than a zero percent flow rate and less than a one hundred percent flow rate.