Carburetor Intermediate Part Integrating Fuel Connections
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Solution Overview
Problem
Existing carburetors for hand-operated tools with internal combustion engines have complex structures, making them difficult to manufacture and assemble, with long fuel line paths and multiple components that complicate the routing of fuel and air connections.
Innovation Solution
A carburetor design featuring an intermediate part between the pump cover and the carburetor body, where the fuel inlet, outlet, and compensation connection are formed, allowing for a compact and simplified structure with short fuel line paths and integrated assembly, reducing the number of components and assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fuel inlet, outlet, and compensation connection are formed on separate components, then each component can be independently manufactured, but the overall structure becomes complex with long fuel line paths and multiple assembly steps
Solution Approach 1:
The patent integrates the fuel inlet, fuel outlet, and compensation connection directly into the carburetor body as a unified structure. This merging of previously separate components into single integrated features eliminates the need for multiple separate parts and their associated assembly steps, thereby reducing device complexity while maintaining manufacturability through the carburetor body's overall formation process
2Manufacturing precision
If multiple separate components are used in the carburetor, then each component can be optimized independently, but the fuel line paths become long and assembly complexity increases
Solution Approach 1:
By integrating the fuel inlet, outlet, and compensation connection directly into the carburetor body, the patent eliminates the need for long external fuel lines and connections between separate components. The fuel pathways become internal channels within the unified carburetor body structure, significantly reducing the total length of fuel line paths while maintaining the ability to optimize the overall component design
3Adaptability or versatility
If the connection fittings are arranged on different sides of the carburetor housing, then routing flexibility is improved, but the overall device size increases and mounting space requirements increase
Solution Approach 1:
The patent arranges the fuel inlet, fuel outlet, and compensation connection in a compact configuration on the carburetor body, optimizing their spatial distribution in three-dimensional space. By carefully positioning these connections on different faces or regions of the carburetor body housing, the design achieves routing flexibility equivalent to having them on opposite sides while maintaining a compact overall footprint and minimizing mounting space requirements
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
A carburetor (15) has a carburetor housing (17) in which an intake port section (16) is formed, into which at least one fuel port (27, 28) opens. The carburetor (15) has a fuel pump (30) with a pump diaphragm (32) that defines a pump chamber (36). The pump chamber (36) is connected to a fuel inlet (63, 63'). A pressure regulator (40) with a control diaphragm (44) is provided, which separates a control chamber (43) from a compensation chamber (45). The control chamber (43) is connected to a fuel outlet (64) from the carburetor (15). The compensation chamber (45) is connected to a compensation port (65). The carburetor housing (17) has a carburetor body (60), a pump cover (68) which at least partially limits the fuel pump (30), and an intermediate part (62) arranged between the pump cover (68) and the carburetor body (60).It is provided that the fuel inlet (63, 63'), the fuel outlet (64) and the compensation port (65) are formed on the intermediate component. For a hand-held implement, it is provided that the fuel inlet (63, 63'), the fuel outlet (64) and the compensation port (65) are arranged on the side (90) of the carburetor (15) facing away from the internal combustion engine (1).