Multipurpose Engine Fuel Gas Recovery Canister Layout
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Solution Overview
Problem
Conventional multipurpose engines with fuel gas adsorption systems are complex, costly, and difficult to maintain, with complications arising from liquid check valves, large cap integration, and increased air resistance affecting engine output.
Innovation Solution
A multipurpose engine design featuring an adsorbing material canister with simplified port connections between a heat-insulating intake pipe and air cleaner, allowing for efficient fuel gas recovery without narrowing air passages, and incorporating an adsorbing material block adjacent to the filter element to manage fuel gas adsorption and suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid check valve and sealed piping system are provided in conventional multipurpose engines, then fuel leakage is prevented, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the liquid check valve and sealed piping system from the fuel tank assembly. Instead of providing complex sealing mechanisms within the fuel tank, the design allows the fuel tank to have a simpler structure without these components, thereby reducing device complexity while maintaining fuel leakage prevention through alternative means
Solution Approach 2:
The fuel tank cap is designed to serve multiple functions: it provides the opening for fuel filling, acts as a mounting point for the adsorbing material chamber, and facilitates fuel gas recovery. This multi-functional design eliminates the need for separate liquid check valves and complex sealing arrangements, reducing overall device complexity while maintaining reliability
2Quantity of substance
If the cap with integrated canister is made large to accommodate adsorbing material, then fuel gas adsorption is improved, but layout complexity in engine increases
Solution Approach 1:
The adsorbing material chamber is nested within or integrated with the fuel tank cap structure. This nesting arrangement allows the adsorbing material to be accommodated within the existing cap volume without requiring additional external space, thereby increasing adsorbing material capacity while maintaining simple engine layout
Solution Approach 2:
The fuel tank cap and adsorbing material chamber are merged into a single integrated component. This combination eliminates the need for separate mounting structures and complex spatial arrangements, allowing sufficient adsorbing material to be accommodated while keeping the engine layout simple and straightforward
3Reliability
If adsorbing material is placed adjacent to air cleaner filter element, then fuel gas adsorption is effective, but air passage resistance increases affecting engine output
Solution Approach 1:
The patent separates the adsorbing material chamber from the air cleaner assembly into distinct locations. The adsorbing material is placed in the fuel tank cap area, while the air cleaner maintains its own independent air passage. This segmentation prevents the adsorbing material from obstructing the air passage, thereby maintaining engine output while still achieving effective fuel gas adsorption through the dedicated adsorbing material chamber
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 design results in a cost-effective, easy-to-maintain multipurpose engine with reduced gas pipe complexity and no decrease in engine power, effectively recovering fuel gas while preventing fuel leakage.
Implementation Method 1
a fuel gas evaporated within a fuel tank of the engine is drawn out of the fuel tank and is adsorbed by an adsorbing material
Implementation Method 2
the fuel gas separated from the adsorbing material is suctioned into an intake system of the engine by using negative pressure inside the intake system
Data Source
AI summary
In this multipurpose engine, a fuel gas evaporated within a fuel tank of the engine is drawn out of the fuel tank and is adsorbed by an adsorbing material, the fuel gas is separated from the adsorbing material, and then the fuel gas separated from the adsorbing material is suctioned into an intake system of the engine by using negative pressure inside the intake system. The adsorbing material is accommodated in a canister, and two connection ports used for connection with the canister are respectively provided at a heat-insulating intake pipe between a carburetor and the engine and at a clear section of an air cleaner.