Fuel Supply Rail Segmentation for Multi-Angle Injector Assembly
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Solution Overview
Problem
Conventional fuel supply systems for multiple cylinder engines face difficulties in assembling a common fuel supply rail when fuel injectors have different attaching angles, leading to reduced workability and accuracy in assembly.
Innovation Solution
The system divides fuel injectors into groups with dedicated fuel supply rails, allowing for connection through a flexible unit, which moderates the angle differences and facilitates easier assembly by grouping injectors with similar angles and connecting the rails via a flexible hose and coupling members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common fuel supply rail is used for all fuel injectors, then the system structure is simplified, but assembling becomes difficult when fuel injectors have different attaching angles
Solution Approach 1:
The fuel supply rail is divided into multiple separate rails, each corresponding to a group of fuel injectors with similar attaching angles. This segmentation allows each rail to be designed and assembled independently for its specific group, avoiding the assembly difficulties that would arise from trying to accommodate all different angles in a single common rail.
2Ease of manufacture
If each fuel injector has its own separate fuel supply rail, then assembling workability is improved, but the system structure becomes more complex
Solution Approach 1:
Fuel injectors with similar attaching angles are grouped together and share a common fuel supply rail. This merging approach reduces the total number of rails needed compared to giving each injector its own rail, while still maintaining the assembly advantage of having dedicated rails for each group.
Solution Approach 2:
Each fuel supply rail is designed to serve multiple fuel injectors within its group, making it a universal component for that specific configuration. This multi-functionality reduces overall system complexity while preserving assembly simplicity.
3Volume of moving object
If fuel injectors with different attaching angles are connected to a common rail, then the system is more compact, but the precision of angle alignment deteriorates
Solution Approach 1:
By segmenting the fuel supply system into multiple rails based on angle groups, the patent maintains compactness within each angle group while avoiding the precision loss that would occur in a single common rail trying to accommodate all different angles.
Solution Approach 2:
Each fuel supply rail is optimized for its specific angle group, with local quality tailored to the specific attaching angles of its corresponding injectors. This ensures high precision angle alignment for each group without compromising overall system compactness.
Data Source
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AI summary
To provide a fuel supply system for an engine that can enhance the assembling workability even though each fuel injector has an attaching angle different from one another,fuel injectors 57-60 are divided into a plurality of injector groups including a first injector group 65 and a second injector group 66. A first fuel supply rail 72 is connected to the fuel injectors 57, 58 of the first injector group 65, and the second fuel supply rail 73 is connected to the fuel injectors 59, 60 of the second injector group 66. The first fuel supply rail 72 and the second fuel supply rail 73 are connected to each other through a connecting unit 75.