Exhaust Chamber Nested in Conduit for Particle Filter Diagnosis
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Solution Overview
Problem
Existing particle filter diagnosis systems for internal combustion engines are impractical due to their non-compact construction and expensive manufacturing costs, as they require a secondary exhaust line outside the main exhaust line, making them difficult to integrate and maintain.
Innovation Solution
A compact device with an exhaust conduit and an exhaust chamber containing a detection filter and temperature sensor, where the exhaust chamber is thermally connected to the environment and integrated within the exhaust conduit, allowing for efficient temperature measurement and diagnosis of the particle filter's operability without additional space or complex manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a secondary exhaust line is arranged outside the main exhaust line for particle filter diagnosis, then the diagnosis system can function properly with thermal contact to ambient, but the construction becomes non-compact and difficult to manufacture
Solution Approach 1:
The exhaust chamber is arranged inside the exhaust conduit, with the detection filter integrated within the exhaust chamber. This nested configuration allows the diagnosis system to be compact while maintaining thermal connection to the ambient environment through the exhaust conduit wall, thereby resolving the contradiction between functionality and compactness.
Solution Approach 2:
Instead of arranging the secondary exhaust line outside the main exhaust line in a separate spatial dimension, the invention integrates the exhaust chamber within the exhaust conduit's cross-sectional area. This dimensional reorganization achieves compact construction while preserving the thermal bridge to ambient through the conduit wall.
2Reliability
If a branch pipe with bent portions is used for secondary exhaust line, then thermal contact to ambient is achieved, but manufacturing becomes difficult and expensive
Solution Approach 1:
The exhaust chamber is nested within the exhaust conduit, eliminating the need for separate bent branch pipes. The exhaust chamber can be formed as a simple structure within the conduit body, significantly reducing manufacturing complexity and cost while maintaining the thermal bridge function through the conduit wall.
Solution Approach 2:
The invention merges the exhaust chamber with the exhaust conduit structure, so that the conduit itself serves as both the main exhaust pathway and the housing for the diagnosis system. This integration eliminates the need for separate bent connection pipes, simplifying manufacturing.
3Device complexity
If the exhaust chamber is integrated within the exhaust conduit, then compact construction is achieved, but thermal connection to ambient environment must be maintained
Solution Approach 1:
The exhaust chamber is thermally connected to the ambient environment at specific locations through the exhaust conduit wall, such as at the inlet or outlet ends. This localized thermal connection maintains the required ambient thermal contact while keeping the overall construction compact and integrated within the conduit.
Solution Approach 2:
The exhaust conduit wall acts as an intermediary, providing thermal connection between the exhaust chamber and the ambient environment. This allows the compact integrated design to maintain the necessary thermal bridge function without requiring the exhaust chamber to be externally positioned.
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 enables easier integration, reduced manufacturing costs, and more frequent monitoring of the particle filter's performance, with spontaneous regeneration of the detection filter, improving maintenance accessibility and reducing ambient sensitivity.
Implementation Method 1
At least a portion of the exhaust chamber is thermally connected to the environment exterior to the exhaust conduit to form a thermal bridge between the exhaust chamber and the environment exterior to the exhaust conduit
Implementation Method 2
a temperature sensor arranged in the exhaust chamber, the temperature sensor being arranged for measuring the temperature of a portion of the exhaust gas stream having passed through at least a part of the detection filter
Implementation Method 3
an exhaust chamber having a detection filter... In case there are too many residual particles contained in the exhaust gas that has passed through the particle filter, the detection filter in the secondary exhaust line (branch pipe) is getting clogged
Data Source
Figure 1
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Figure 4
AI summary
A device for the diagnosis of the operability of a particle filter for an exhaust gas stream (1) of an internal combustion engine, the device comprising: - an exhaust conduit (2) having an outer wall (21), the outer wall (21) of the exhaust conduit (2) defining a virtual bounding tubular envelope (22), the virtual bounding tubular envelope (22) being the smallest possible tubular envelope having a circular cross-section co-planar to the cross-section of the exhaust conduit (2) and completely surrounding the outer wall (21) of the exhaust conduit (2) at any position along the exhaust conduit (2), - an exhaust chamber (3) having a detection filter (31), - a temperature sensor (32) arranged in the exhaust chamber (3), the temperature sensor (32) being arranged for measuring the temperature of a portion (11) of the exhaust gas stream (1) having passed through at least a part of the detection filter (31), wherein at least a portion of the exhaust chamber (3) is thermally connected to the environment exterior to the exhaust conduit (2), and wherein the exhaust chamber (3) is at least partly arranged within the virtual bounding tubular envelope (22) over the entire length of the exhaust chamber (3).