Vehicle Exhaust Muffler Mechanical Tube Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle exhaust silencers face issues with the stability and stress on connections between pipes and the peripheral wall, leading to potential corrosion and distortion, particularly due to axial radial bearing limitations.
Innovation Solution
The exhaust gas silencer employs a mechanical forming method to attach the tube to the insert at two spaced locations, providing axial and radial firm connections, reducing the need for external bearings and minimizing distortion, with the option for circumference or segment connections, allowing for unrestrained thermal expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tubes are welded to the peripheral wall, then connection strength is improved, but corrosion susceptibility and distortion increase
Solution Approach 1:
The patent replaces the welding process (thermal-chemical joining) with a mechanical deformation attachment system. The tube is mechanically deformed and attached to the insert, creating a firm connection through mechanical interlocking rather than welding. This substitution eliminates the harmful effects of welding such as corrosion susceptibility and distortion while maintaining connection strength.
2Stability of the object's composition
If tubes are firmly connected to the peripheral wall, then connection stability is improved, but thermal expansion freedom deteriorates
Solution Approach 1:
The patent divides the attachment system into two functional segments: the tube is firmly connected to the insert (providing radial stability), while the insert itself is held in the longitudinal direction only through the tube, allowing axial movement. This segmentation enables the system to maintain connection stability in radial directions while permitting thermal expansion freedom in the axial direction.
3Ease of operation
If external storage is provided near the peripheral wall, then component accessibility is improved, but device complexity increases
Solution Approach 1:
The patent merges the storage function with the existing insert structure. The insert serves dual purposes: it provides the structural framework for tube attachment and simultaneously serves as the storage location. This eliminates the need for separate external storage components, reducing device complexity while maintaining accessibility.
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 solution enhances the stability and strength of the connection, reduces corrosion susceptibility, and lowers distortion, while enabling thermal expansion, thus improving the overall durability and performance of the silencer.
Implementation Method 1
The attachment of the tube to the insert is preferably performed by mechanical deformation
Implementation Method 2
The pipe and the use are usually compressed together
Implementation Method 3
This preferred embodiment allows an unhindered thermal expansion of the insert in the axial direction
Data Source
Figure 1a~1
Figure 2~5
Figure 3
AI summary
A vehicle exhaust muffler, which is provided with a wound design, has a pipe (31), which extends through the peripheral wall (7), is welded on one side to the peripheral wall (7) and is fastened on the other to a retaining wall (23) of an inner lying insert by means of mechanical shaping.