Integrated Circulation Path for Vaporized Fuel Introduction
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Solution Overview
Problem
Existing vaporized fuel introduction apparatuses for engines have a complex design with multiple components and assembly challenges due to separate passageways for compressed air and vaporized fuel, increasing the number of parts and complexity.
Innovation Solution
A vaporized fuel introduction apparatus with a single-body circulation path integrating the compressor housing and intake duct, featuring an ejector mechanism within the circulation path that eliminates the need for separate passageways, reducing component count and simplifying assembly by using a tapered ejector body and recessed coupling surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate passageways are provided for compressed air and vaporized fuel, then the functional requirements are met, but the number of component parts increases and assembly complexity increases
Solution Approach 1:
The patent combines the compressed air passageway and vaporized fuel passageway into a single integrated passageway structure. The circulation path serves dual purposes: it transports compressed air from the supercharger and also introduces vaporized fuel from the canister to the intake flow path. This merging eliminates the need for separate passageways while maintaining all required functions, thereby reducing component parts and simplifying assembly.
2Reliability
If separate passageways are provided for compressed air and vaporized fuel, then the functional requirements are met, but assembly operation complexity increases
Solution Approach 1:
The circulation path is designed as an integrated structure that combines both compressed air and vaporized fuel transport functions. By merging the passageways, the assembly operation is simplified as fewer components need to be installed and connected. The single-body construction reduces the number of coupling operations and sealing requirements, making assembly more straightforward while ensuring reliable functional performance.
3Reliability
If multiple passageways are used, then functional completeness is achieved, but diagnostic systems become necessary
Solution Approach 1:
The patent integrates both fluid transport functions into a single circulation path, which eliminates the need for separate diagnostic systems for each passageway. The unified structure allows for simpler monitoring and troubleshooting, as there is only one passageway system to diagnose rather than multiple separate systems. This reduces the complexity of diagnostic requirements while maintaining complete functional coverage for both compressed air and vaporized fuel introduction.
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
This design reduces the number of components, simplifies assembly, and eliminates the need for diagnostic systems, while ensuring efficient introduction of vaporized fuel into the engine's intake flow path, thereby enhancing operational efficiency and reducing costs.
Implementation Method 1
a vaporized fuel introduction path 208 coupled to the circulation path 200 and configured to guide the vaporized fuel and an ejector mechanism 210 provided in the circulation path 200
Data Source
AI summary
A vaporized fuel introduction apparatus introduces vaporized fuel to an intake system that includes a compressor housing that houses a compressor impeller and an intake duct that is coupled to an upstream side of the compressor housing. The vaporized fuel introduction apparatus includes a circulation path, a vaporized fuel introduction path, and an ejector mechanism. The circulation path is made up of a housing-side flow path provided as a single body with the compressor housing and a duct-side flow path provided as a single body with the intake duct. The circulation path circulates compressed air flowing in a portion of the compressor housing which is downstream of the compressor impeller to the intake duct. The vaporized fuel introduction path is coupled to the circulation path and guides the vaporized fuel. The ejector mechanism is provided in the circulation path.