Motorcycle Air Cleaner Lamination for Noise Reduction
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Solution Overview
Problem
Existing two-wheeled motorcycle air cleaner units face challenges in reducing air intake noises and vibrations while maintaining capacity, particularly when using carbon fiber materials, which require additional reinforcing structures that increase cost and complexity.
Innovation Solution
The implementation of a lamination layer structure comprising multiple layers of carbon fiber and elastic material layers in the air cleaner unit, with thicker elastic material layers in strategic areas to absorb noise and vibrations, reduces the overall thickness and enhances noise reduction without compromising capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the layer of carbon fiber is thickened to reduce air intake noises and vibrations, then noise reduction is improved, but the capacity of the air cleaner unit is decreased
Solution Approach 1:
The patent applies composite materials by combining carbon fiber layers with elastic material layers to create a lamination structure. This composite approach allows the elastic material to absorb noise and vibrations while the carbon fiber provides structural strength, thereby reducing noise without requiring increased thickness that would compromise air cleaner unit capacity.
Solution Approach 2:
The patent changes the material parameters by introducing elastic material with different mechanical properties than pure carbon fiber. The elastic material layer has higher noise absorption capability, allowing the same noise reduction effect to be achieved with reduced overall thickness, thus maintaining capacity while reducing noises and vibrations.
2Weight of moving object
If carbon fiber is used for the air cleaner unit to reduce weight, then weight is reduced, but reinforcing ribs are required to suppress noises and vibrations which increases cost and complexity
Solution Approach 1:
The patent uses composite materials consisting of carbon fiber layers combined with elastic material layers. This composite structure inherently provides both the weight reduction benefits of carbon fiber and the noise/vibration suppression capabilities of elastic material, eliminating the need for additional reinforcing ribs and simplifying the overall structure.
Solution Approach 2:
The elastic material layer serves multiple functions simultaneously: it provides noise absorption, vibration suppression, and structural reinforcement. This multi-functionality replaces the need for separate reinforcing ribs, reducing device complexity while maintaining the weight benefits of carbon fiber construction.
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 approach effectively decreases air intake noises and vibrations, allows for a more compact design, and reduces the need for additional reinforcing structures, thereby lowering production costs and maintaining the air cleaner unit's capacity.
Implementation Method 1
the lamination layer part is formed of a carbon fiber layer and an elastic material layer. Since the air intake noise and the like are effectively absorbed by the elastic material layer
Data Source
AI summary
In an air cleaner unit having a casing body of carbon fiber and configured to introduce outside air into an engine, a lamination layer part formed by laminating plural kinds of materials is arranged in a region of at least a portion of the air cleaner unit. The lamination layer part is formed of a carbon fiber layer and an elastic material layer. The casing body is provided with an opening to be connected to an air intake duct. The lamination layer part is formed of a first lamination layer part and a second lamination layer part of which the elastic material layer is thicker than that of the first lamination layer part. The second lamination layer part is arranged around the opening.