Muffler Structure with Segmented Mesh for High-Temperature Exhaust Noise Reduction
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Solution Overview
Problem
Conventional exhaust pipes face issues with noise reduction due to high-temperature exhaust gases damaging noise absorption materials, leading to noise and fiber debris problems when the engine restarts.
Innovation Solution
A muffler structure utilizing a carbon fiber body with an accommodation tube, fiber cotton, and multiple mesh portions to scatter and buffer high-pressure exhaust gases, reducing noise through a series of pressure reductions and buffer spaces defined by the first and second cover units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noise absorption cotton is used to reduce exhaust noise, then noise reduction is improved, but the cotton burns and melts when exposed to high-temperature exhaust gas, causing crystals and linear fibers to damage the exhaust pipe and generate noise
Solution Approach 1:
The exhaust pipe is divided into multiple functional sections: a first section with a first mesh portion for initial pressure reduction, a second section with a second mesh portion for further pressure reduction, and a third section with a silencer for noise absorption. This segmentation allows each section to handle specific functions, protecting the noise absorption material from direct exposure to high-temperature exhaust gas while maintaining effective noise reduction.
Solution Approach 2:
The mesh portions act as intermediary elements between the exhaust gas and the noise absorption cotton. These mesh portions reduce the pressure and temperature of the exhaust gas before it reaches the noise absorption material, preventing the cotton from burning and melting while still allowing the system to achieve noise reduction.
2Device complexity
If exhaust gas flows directly through the noise reducer, then exhaust gas discharge is simplified, but the high-pressure exhaust gas damages the fiber cotton and causes noise when the engine restarts
Solution Approach 1:
The exhaust gas discharge path is segmented into multiple stages with different mesh portions at different locations. The first mesh portion is positioned near the engine connection to handle high-pressure exhaust gas, while the second mesh portion is positioned further down the exhaust pipe to provide additional pressure reduction before the gas reaches the noise absorption section. This multi-stage approach protects the fiber cotton from damage while maintaining a relatively simple overall structure.
3Object-affected harmful factors
If multiple mesh portions and buffer spaces are added to reduce exhaust pressure, then noise reduction is improved, but the device complexity increases
Solution Approach 1:
The muffler is segmented into distinct functional zones: a first mesh portion section for initial pressure reduction, a second mesh portion section for further pressure reduction, and a silencer section for noise absorption. Each segment is positioned to handle specific functions, allowing the system to achieve multiple pressure reduction stages and effective noise reduction while maintaining clear functional differentiation that simplifies design and manufacturing.
Solution Approach 2:
Different sections of the exhaust pipe are assigned different local qualities and functions. The mesh portions are located specifically where pressure reduction is needed, while the noise absorption cotton is placed in a protected environment where it can effectively reduce noise without being exposed to damaging temperatures. This localized approach optimizes performance while avoiding unnecessary complexity throughout the entire structure.
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
Effectively reduces noise by scattering and buffering high-pressure exhaust gases, preventing damage to noise absorption materials and minimizing noise and debris issues during engine operation.
Implementation Method 1
the high-pressure exhaust gas scatters to multiple orifices of the hollowly tubular mesh of a first cover unit so as to reduce to a first exhaust pressure
Implementation Method 2
the high-pressure exhaust gas is guided to an accommodating space of an accommodation tube of the body so as to be reduced to a third exhaust pressure by a buffer space
Implementation Method 3
the high-pressure exhaust gas is decreased to a minimum exhaust pressure less than the first, second, and third exhaust pressures by a first stop portion, thus buffering the high-pressure exhaust gas in the body of the muffler structure
Data Source
AI summary
A muffler structure contains: a body, a first cover unit, and a second cover unit. The body includes an accommodation tube, fiber cotton, and a first mesh portion. The accommodation tube has an accommodating space and an internal fence. The first cover unit includes a manifold connection portion, a first polygonal cap, a hollowly tubular mesh having multiple orifices, a second mesh portion, and a stainless steel mesh. The second cover unit is fixed on a rear end of the accommodation tube of the body opposite to the first cover unit, and the second cover unit includes a second polygonal cap and a silencer. The second polygonal cap is covered on the accommodation tube of the body, and the second polygonal cap has a receiving portion defined in a free end thereof and configured to accommodate the silencer.