Automobile Muffler Plug-in Tailpipe Connection
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Solution Overview
Problem
Existing methods for producing vehicle mufflers are complex and expensive, limiting the length and shape of exhaust pipe connections that can be attached, as they require deformation tools and are not cost-effective for longer or varied pipe configurations.
Innovation Solution
A method involving a plug-in connection of tailpipes through a recess in the winding casing onto a support plate, allowing axial movement and easy attachment without additional processing, enabling the use of pipes of any length and shape, and accommodating thermal expansion through conical tapers or widening, which simplifies and reduces mechanical stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical forming with deformation tools is used to attach exhaust pipe connections, then the connection is secure, but the manufacturing process becomes complex and expensive
Solution Approach 1:
The patent replaces the complex mechanical deformation tool system with a simple plug-in connection system. The exhaust pipe connection is attached to the muffler insert via a straightforward insertion into an opening, eliminating the need for deformation tools and complex forming operations while maintaining secure connection.
Solution Approach 2:
The patent uses a simple, inexpensive plug-in connection design that can be easily manufactured and assembled. The connection structure is designed to be simple and cost-effective, using basic geometric features (openings, pipe sections) rather than complex mechanical systems.
2Reliability
If deformation tools are used inside the exhaust pipe connection, then the connection is secure, but only short pipe sections can be attached
Solution Approach 1:
The patent replaces the deformation tool-based attachment method with a plug-in connection system that accommodates pipes of any length. The connection security is achieved through the geometric fit of the pipe into the opening and its attachment to the muffler insert, not through deformation, thereby removing the length limitation.
3Reliability
If complex processing is applied to the tailpipe, then the connection is secure, but the manufacturing becomes expensive
Solution Approach 1:
The patent uses a simple plug-in connection design that requires no additional complex processing of the tailpipe. The pipe is simply inserted into the opening and attached to the muffler insert, eliminating expensive machining, deformation, or other complex operations while ensuring secure connection.
Solution Approach 2:
The patent replaces complex mechanical processing operations with a simple insertion and attachment process. The connection security is achieved through the plug-in geometry and attachment mechanism rather than through complex processing steps, thereby reducing manufacturing cost.
4Strength
If rigid connection is used between pipe and silencer insert, then structural integrity is maintained, but mechanical stresses from thermal expansion occur
Solution Approach 1:
The patent creates a dynamic connection system where the pipe can move axially relative to the muffler insert. This dynamic capability allows the system to accommodate thermal expansion and contraction of the exhaust pipe while maintaining structural integrity through the attachment to the muffler insert.
Solution Approach 2:
The patent allows the connection parameters to change dynamically - specifically, the axial position of the pipe relative to the muffler insert can vary. This parameter change capability enables the system to absorb thermal expansion stresses while maintaining structural integrity through the attachment mechanism.
Data Source
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Figure 11~14
AI summary
The method involves inserting an end pipe (18) on or in a support plate (24) of a muffler insert (20) through a recess in the compressed jacket (16), and attaching the end pipe at the compressed jacket while maintaining the generated plug-in connection. The end pipe is inserted on a socket (32) of the support plate or in an opening of the support plate. An independent claim is also included for a vehicle muffler comprises a housing.