Exhaust Gas Muffler Pipe Holding via Circumferential Wall Integration
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Solution Overview
Problem
Existing exhaust gas mufflers face challenges in reliably holding exhaust gas pipes to the muffler housing without additional components inside the housing, which can lead to instability and increased complexity.
Innovation Solution
The exhaust gas muffler features two exhaust gas pipe holding openings in the circumferential wall, with the pipes fixed securely using a closing element and welding, eliminating the need for internal components for support, and incorporating protruding holding edges and cross-sectional reductions for precise fitting and gas-tight connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional components are provided in the housing interior to support the exhaust gas pipe, then the holding stability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the support function from internal components and relocates it to the circumferential wall of the housing. By providing holding openings directly in the circumferential wall and securing the exhaust gas pipe there, the design eliminates the need for separate internal support components, thereby reducing device complexity while maintaining holding stability.
Solution Approach 2:
The patent transitions from internal support structures to external wall integration. By moving the support mechanism from the housing interior to the circumferential wall, the design utilizes a different spatial dimension (the wall structure) to achieve support, reducing internal component complexity while maintaining stability.
2Reliability
If multiple internal components are added to ensure gas-tight connection, then the connection reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the gas-tight connection function with the structural holding opening in the circumferential wall. By integrating the sealing function into the holding opening structure itself, the design achieves gas-tight connection without requiring separate internal sealing components, thereby improving reliability while simplifying manufacturing.
Solution Approach 2:
The holding opening structure in the circumferential wall is designed to inherently provide gas-tight sealing through its geometry and the insertion fit of the exhaust gas pipe. The structure serves itself by combining support and sealing functions in one element, eliminating the need for additional sealing components and reducing manufacturing complexity.
3Stability of the object's composition
If the exhaust gas pipe is fixed with multiple internal support components, then the structural stability is improved, but the flow resistance increases
Solution Approach 1:
The patent extracts the support function from the exhaust gas pipe itself and relocates it to the circumferential wall. By providing holding openings in the wall and securing the pipe there, the design avoids adding internal support components that would protrude into the housing interior and increase flow resistance, while maintaining structural stability through external wall support.
Data Source
AI summary
An exhaust gas muffler, for an exhaust system of an internal combustion engine, includes a muffler housing (12) with a circumferential wall (14) elongated in a housing axis (L) direction and with an end wall (20, 22) at each axial end area (16, 18). Two exhaust gas pipe holding openings (44, 46) are provided in the circumferential wall (14) with an exhaust gas pipe (40) fixed to the circumferential wall (14) in an area of each exhaust gas pipe holding opening (44, 46) and open towards a housing interior (24). The exhaust gas pipe (40) is preferably closed at one end area (54) by a closing element (58). The exhaust gas pipe (40) has at least one exhaust gas passage opening (66) in a length area (64) extending between the two exhaust gas pipe holding openings (44, 46).