Air Intake Misaligned Joining Positions Reduce Joint Forces
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Solution Overview
Problem
The existing air intake apparatus design, where joining positions are aligned orthogonally to the intake air flow direction, leads to increased forces at the joints, causing separation issues and potential interference with fuel supply components when external forces are applied.
Innovation Solution
The air intake apparatus is designed with misaligned joining positions along the intake air flow direction, reducing the moment of couple and forces applied to the joints, and utilizing a three-piece structure made of weldable resin materials to enhance joint stability and reduce weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If joining positions are aligned orthogonally to the intake air flow direction, then the structure is simple and manufacturing is easy, but the force at the joints increases causing separation
Solution Approach 1:
The patent changes the arrangement of joining positions from a single straight line (one-dimensional alignment) to positions distributed across different locations including the lateral direction of the protrusion base. This dimensional redistribution reduces the concentration of forces at any single location, preventing joint separation while maintaining manufacturing simplicity.
2Device complexity
If joining positions are close to each other for compact structure, then the device complexity is reduced, but the force based on moment of couple increases causing joint separation
Solution Approach 1:
Instead of placing joining positions close together along a single straight line, the patent distributes them across different spatial locations including lateral positions relative to the protrusion base. This spatial distribution increases the effective lever arm distance, reducing the moment of couple and resulting forces at each joint while avoiding increased device complexity.
3Volume of moving object
If the fourth divided case component is positioned on the upper side for compact design, then the structure is compact, but it interferes with the fuel supply component when external force is applied
Solution Approach 1:
The patent employs asymmetric positioning of joining positions relative to the protrusion base, particularly placing a joining position at the lateral direction rather than symmetrically along the vertical centerline. This asymmetric arrangement creates more favorable stress distribution patterns under external forces, reducing the likelihood of joint separation and subsequent interference with fuel supply components while maintaining compact overall dimensions.
Data Source
AI summary
In an air intake apparatus, a first joining position between an intermediate piece and a first piece in a vicinity of a base of a protrusion of the intermediate piece opposite to an intake port is misaligned along an intake air flow direction with respect to a second joining position between the intermediate piece and a second piece in the vicinity of the base of the protrusion of the intermediate piece.