Rotary Multi-Fuel Switching Valve for Three-Fuel Engine Adaptation
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Solution Overview
Problem
Existing fuel switching devices cannot adapt to three or more fuels, preventing internal combustion engines from achieving optimal working states, especially when using multiple gas fuels.
Innovation Solution
A multi-fuel switching device with a switching valve that includes a housing with an air inlet and outlet, a rotatable valve core with different-sized airways, and a position feedback device, allowing for simple switching between fuels and maintaining optimal engine performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional fuel switching device with two switches is used, then the switching between two fuels is simple, but the device cannot adapt to three or more fuels including multiple gas fuels
Solution Approach 1:
The switching device is segmented into multiple independent switching units, each unit containing a switch and corresponding fuel pipeline. This allows the device to handle multiple fuel types (liquid fuel, first gas fuel, second gas fuel) by selectively activating appropriate units, thereby improving adaptability while maintaining manageable complexity through modular design
Solution Approach 2:
The switching device is designed with universal functionality to handle multiple fuel types through a unified control mechanism. The controller can selectively activate different switching units based on the required fuel type, enabling the same device structure to serve multiple fuel switching purposes without requiring completely separate systems for each fuel type
2Adaptability or versatility
If multiple switches are added to support three or more fuels, then the fuel switching capability is improved, but the device complexity and cost increase
Solution Approach 1:
Multiple switching units are merged into a single integrated switching device with unified housing and coordinated control. The switching units share common structural elements and are controlled by a single controller that coordinates their operation, reducing overall device complexity and cost compared to having completely separate switching systems for each fuel type
3Reliability
If a switching device for multiple gas fuels is designed, then the engine can maintain optimal working state for different gas fuels, but the structure becomes complex
Solution Approach 1:
The switching valve incorporates local quality variations through differently sized airways (first airway and second airway) within the same valve structure. Each airway size is optimized for specific gas fuel types, allowing the engine to maintain optimal working state for different gases while using a single integrated valve rather than multiple separate valves
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 internal combustion engine to maintain optimal working states by selecting the appropriate airway for different gas fuels, simplifying operations and reducing costs while ensuring accurate valve positioning and simultaneous switching of liquid and gas fuels.
Implementation Method 1
A valve core is rotatably set within the housing and located between the air inlet and the air outlet. The valve core is provided with a first airway and a second airway. Cross-sectional sizes of the first airway and the second airway are different. The first airway or the second airway is selected through rotating the valve core to connect the air inlet and the air outlet.
Data Source
AI summary
A multi-fuel switching device, including a gas part, is provided. The gas part includes a switching valve. The switching valve includes a housing having an air inlet and an air outlet. An internal rotation of the housing is provided with a valve core located between the air inlet and the air outlet. The valve core is provided with a first airway and a second airway. Cross-sectional sizes of the first airway and the second airway are different. The first airway or the second airway is selected through rotating the valve core to connect the air inlet and the air outlet. The solution solves the issue that a fuel switching device in the prior art cannot adapt to three or more fuels, which causes an internal combustion engine to be unable to maintain the optimal working state.