Resonator Structure Oil-Gathering Texture for Intake Noise Reduction
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Solution Overview
Problem
Existing resonator structures in intake ducts require strict tolerance management to maintain a predetermined gap for effective noise reduction, leading to increased manufacturing costs.
Innovation Solution
A resonator structure with a collar that protrudes into the intake duct, featuring a surface texture that gathers oil into the gap between the collar and the duct inner surface, allowing the oil to close the gap and maintain noise reduction performance without strict tolerance management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strict tolerance management is implemented to maintain a predetermined gap between the resonator and intake duct, then noise reduction performance is improved, but manufacturing cost increases
Solution Approach 1:
The invention changes the physical-chemical parameters of the gap by filling it with oil instead of maintaining a precise air gap. The oil's physical properties (viscosity, surface tension) enable it to conform to surface irregularities and seal the gap effectively, transforming the gap from a critical dimensional parameter to a fluid-filled space that self-adjusts to tolerance variations.
Solution Approach 2:
The oil acts as an intermediary substance between the resonator collar and the intake duct inner surface. It mediates the gap closure by flowing into and filling the space, using its fluid properties to adapt to surface variations and achieve sealing without requiring precise mechanical tolerances.
2Reliability
If a collar structure is used to maintain gap distance, then noise reduction is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The oil performs the sealing function automatically through its own physical properties. It self-adjusts to the gap geometry and surface variations without requiring external adjustment mechanisms or precision machining, effectively making the system self-compensating for tolerance variations.
Solution Approach 2:
The invention changes the state of the gap from a fixed mechanical dimension to a variable fluid-filled space. The oil's ability to flow and conform to surfaces transforms the rigid tolerance requirement into a flexible fluid adaptation, eliminating the need for precise collar positioning.
3Ease of manufacture
If oil is introduced to seal the gap, then manufacturing tolerance requirements are relaxed, but oil management becomes necessary
Solution Approach 1:
The oil serves multiple functions simultaneously: it seals the gap to maintain noise reduction performance, lubricates the collar to reduce friction and wear during engine operation, and potentially cleans surfaces. This multi-functionality justifies the added complexity by eliminating the need for separate sealing mechanisms.
Solution Approach 2:
The invention merges the sealing function with the lubrication function in a single oil-based system. Instead of having separate sealing components and lubrication systems, the oil performs both roles, simplifying the overall system architecture despite the added fluid management requirements.
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
The resonator structure achieves intended noise reduction performance by using oil to close the gap between the collar and the duct inner surface, eliminating the need for strict tolerance management and reducing manufacturing costs.
Implementation Method 1
One or both of the inner surface and the collar include a surface texture for gathering oil into a gap between the inner surface and the collar
Data Source
AI summary
A resonator structure includes an intake duct and a resonator that is accommodated in the intake duct. The resonator extends upward. The resonator includes a collar that protrudes toward an inner surface of the intake duct. One or both of the inner surface and the collar include a surface texture for gathering oil into a gap between the inner surface and the collar.