Exhaust Probe Carrier Insert for Gastight Corrosion-Resistant Mounting
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Solution Overview
Problem
Existing probe carrier arrangements for internal combustion engine exhaust systems face challenges in providing a stable and corrosion-resistant connection for measuring probes, particularly due to material limitations and thermal stress issues.
Innovation Solution
A probe carrier arrangement is designed with a probe socket and insert made from different materials, allowing for optimal configuration and connection methods such as welding, thread meshing, and press fits, to ensure a stable and gastight connection while accommodating different thermal expansion coefficients and reducing corrosion risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single material is used for both the probe socket and probe carrier insert, then the device complexity is reduced, but the ability to provide optimal material properties for each function (connection stability and corrosion resistance) deteriorates
Solution Approach 1:
The probe carrier arrangement is divided into two separate components: a probe socket and a probe carrier insert. This segmentation allows each component to be manufactured from materials optimized for its specific function - the probe socket for stable connection to the exhaust system and the probe carrier insert for corrosion-resistant connection of the measuring probe.
Solution Approach 2:
The invention employs different materials for the probe socket and probe carrier insert, creating a composite structure. This allows combination of materials with complementary properties - such as a heat-resistant material for the socket and a corrosion-resistant material for the insert - to achieve overall superior performance.
2Reliability
If the probe socket is connected to the probe carrier body by welding, then the connection stability is improved, but the manufacturing complexity and potential for thermal stress increase
Solution Approach 1:
The probe carrier insert is pre-assembled with the measuring probe using thread meshing or press fit connections before the final welding step of attaching the probe socket to the probe carrier body. This preliminary assembly ensures proper positioning and reduces the complexity of the welding operation.
3Reliability
If different materials are used for probe socket and probe carrier insert, then corrosion resistance and thermal stress accommodation are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The probe carrier insert acts as an intermediary component between the probe socket and the measuring probe. It provides standardized connection interfaces (thread meshing or press fit) that simplify the assembly process and reduce precision requirements, while still allowing different materials to be used for the socket and insert.
4Ease of operation
If thread meshing is used to connect the probe carrier insert to the probe socket, then the ease of assembly is improved, but the gastightness and structural strength may be compromised
Solution Approach 1:
The invention combines multiple connection methods - thread meshing for easy assembly and welding or press fit for enhanced strength and gastightness. This merging of connection approaches allows the probe carrier insert to be easily installed while still achieving a robust, leak-proof final assembly.
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
The solution provides a stable, corrosion-resistant, and gastight connection for measuring probes, minimizing thermal stress and corrosion issues, and allowing for easy adaptation to various probe types and environments.
Implementation Method 1
an external thread meshing with the internal thread of the probe socket may be provided on an outer circumferential area of the probe carrier insert
Implementation Method 2
the probe socket may be fixed to the probe carrier body by connection in substance, preferably by welding
Implementation Method 3
the measuring probe is received in the probe carrier insert with a press fit
Data Source
AI summary
A probe carrier arrangement, especially for an exhaust system of an internal combustion engine, includes a probe socket (14) provided at a probe carrier body (12). The probe socket (14) has at least one insert-receiving opening (24) extending in a direction of an insert-receiving opening longitudinal axis (E). A probe carrier insert (28) is arranged in the insert-receiving opening (24). The probe carrier insert (28) has at least one probe-receiving opening (36) extending in a direction of a probe-receiving opening longitudinal axis (S).