Housing Connection Element for Exhaust Gas Treatment
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Solution Overview
Problem
Existing housing connection elements for exhaust gas treatment assembly units in internal combustion engine exhaust systems face challenges in manufacturing complex geometries while ensuring a stable and exhaust gas-tight connection to other components.
Innovation Solution
A housing connection element comprising a first shaped sheet metal part with a cylindrical connection area and a tapered area, combined with a precision-cast second part for connection to exhaust gas-carrying components, incorporating sensor sleeves and laser welding for secure attachment, allowing for complex geometry and precise connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single integrated housing connection element is manufactured with complex geometry, then manufacturing simplicity is improved, but manufacturing precision and connection stability deteriorate
Solution Approach 1:
The housing connection element is divided into two separate parts: a first housing part (shaped sheet metal part) and a second housing part (precision casting). This segmentation allows each part to be manufactured using optimized processes for its specific requirements, with the first part providing geometric flexibility and the second part ensuring precise connections.
Solution Approach 2:
The two housing parts are connected through a connection flange area and annular body area using laser welding, merging them into a single functional unit. This combining approach allows the benefits of both separate manufacturing processes while achieving the overall connection stability required for exhaust gas-tight sealing.
2Ease of manufacture
If a shaped sheet metal part is used for the first housing part, then manufacturing simplicity is improved, but connection stability deteriorates
Solution Approach 1:
The connection element is segmented into a shaped sheet metal first housing part and a precision-cast second housing part. The shaped sheet metal part provides manufacturing simplicity for complex geometries, while the precision-cast second part ensures connection stability and exhaust gas-tight sealing.
Solution Approach 2:
The connection element combines two different material forms (shaped sheet metal and precision casting) to achieve both manufacturing simplicity and connection stability. The composite structure leverages the advantages of each material form for its specific function.
3Reliability
If a precision casting is used for the second housing part, then connection stability is improved, but manufacturing complexity increases
Solution Approach 1:
The housing connection element is divided into two parts manufactured by different processes. The second housing part is manufactured as a precision casting to ensure connection stability, while the first housing part is manufactured as a shaped sheet metal part to simplify overall device complexity.
Solution Approach 2:
Different manufacturing methods are applied to different parts of the connection element based on local requirements. The second housing part requires high precision for connections, so precision casting is used locally, while the first housing part can be manufactured more simply as a shaped sheet metal part.
4Measurement precision
If sensor sleeves are integrated into the tapered area, then sensor placement precision is improved, but device complexity increases
Solution Approach 1:
The sleeve receiving areas are formed as integral features of the first housing part during its manufacturing process. This preliminary action ensures precise sensor placement positions are built-in from the start, avoiding the need for complex post-processing or assembly adjustments.
Solution Approach 2:
The sensor receiving functionality is merged into the structural design of the first housing part through the integrated sleeve receiving areas in the tapered section. This combining approach achieves precise sensor placement without adding separate complex sensor mounting systems.
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
Enables the manufacture of housing connection elements with complex geometries in a simple manner, providing a stable and exhaust gas-tight connection to other components, while allowing for precise sensor placement and high production accuracy.
Implementation Method 1
connection of the second housing part to the first housing part by laser welding
Implementation Method 2
connection of the sensor sleeve to the first housing part by laser welding
Data Source
AI summary
A housing connection element (10) for a housing of an exhaust gas treatment assembly unit of an exhaust system, especially for an internal combustion engine, includes a first housing part (16) with an essentially cylindrical first connection area (18) for connection to a circumferential wall (14) of a housing (12) of an exhaust gas treatment assembly unit. A tapered area (20) is adjacent to the first connection area (18). An annular, second housing part (40) is connected to the tapered area (20). A second connection area (46) is provided for connection to an exhaust gas-carrying component of an exhaust system. At least one sensor sleeve (48, 50) is in a sleeve receiving area (24) of the first housing part (16). The sleeve receiving area (24) is formed in the tapered area (20).