Recessed Intake Port Layout for Precise Dual Injector Positioning
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Solution Overview
Problem
The positioning of fuel injectors in an intake passage of a vehicle's internal combustion engine is challenging due to varying space and shape configurations, making it difficult to locate them at desired positions or directions.
Innovation Solution
An intake structure with a recessed design that houses a second injector within a recessed area and utilizes a mounting base to direct the injector along the passage center line, combined with a funnel to enhance air flow and a protector to secure the connection, allowing precise positioning and efficient fuel injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the injector is positioned in a conventional location without a recess, then the structure is simpler, but the positioning precision and injection direction control are insufficient
Solution Approach 1:
The patent introduces a recessed structure that extends into the intake passage, creating a new spatial dimension for injector placement. This allows the injector to be positioned at a specific depth and angle within the recess, achieving precise positioning and optimal injection direction control without complicating the overall intake passage structure.
Solution Approach 2:
The recess acts as an intermediary structure between the injector and the intake passage. It provides a dedicated mounting location that facilitates precise injector positioning while isolating the complexity of the positioning mechanism within the recess itself, keeping the rest of the intake passage structure relatively simple.
2Volume of moving object
If the injector is positioned closer to the intake passage wall, then the structure is more compact, but fuel may adhere to the wall reducing injection efficiency
Solution Approach 1:
The recess is designed with specific local characteristics - its depth, width, and orientation are optimized to position the injector at an optimal distance from the intake passage wall. This local structural modification ensures that fuel is injected into the center of the passage where mixing is most effective, preventing wall adhesion while maintaining compact overall dimensions.
3Adaptability or versatility
If the injector positioning is fixed without adjustment capability, then the structure is simpler, but adaptability to different vehicle configurations is reduced
Solution Approach 1:
The recessed structure serves multiple functions: it provides precise positioning, controls injection direction, and can accommodate different injector types or orientations. This universal design allows the same basic recess structure to be adapted to various vehicle configurations without requiring complex adjustable mechanisms.
Data Source
AI summary
An intake structure for an internal combustion engine of a vehicle includes: an intake passage structural body defining an intake passage which is connected to the internal combustion engine and through which intake air to be supplied to the internal combustion engine flows, the intake passage structural body including an intake port and a recess which is located between the intake port and the internal combustion engine and is recessed toward the intake passage; a first injector located between the recess and the internal combustion engine and connected to the intake passage structural body so as to inject fuel into the intake passage; and a second injector located inside the recess and connected to the intake passage structural body so as to inject the fuel into the intake passage.