Aftertreatment Module Diffuser Plate Gas Distribution
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Solution Overview
Problem
Existing aftertreatment modules do not effectively utilize an inlet and an outlet on opposite sides and ends, leading to uneven exhaust gas distribution across catalysts, which affects the efficiency of exhaust gas treatment.
Innovation Solution
An aftertreatment module design featuring a housing with a mounting plate forming an inlet chamber on the bottom side and an outlet chamber on the top side, equipped with a diffuser plate that diffuses exhaust gas from one end to the other, ensuring even distribution across a set of catalysts mounted on the mounting plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If exhaust gas flows directly through the housing without a diffuser plate, then the structure is simpler, but the distribution of exhaust gas across the catalysts becomes uneven
Solution Approach 1:
A diffuser plate is introduced as an intermediary component within the inlet chamber to mediate the flow of exhaust gas. The diffuser plate distributes the exhaust gas evenly across the catalysts, resolving the uneven distribution problem while maintaining a relatively simple overall structure.
Solution Approach 2:
The inlet chamber is segmented into an upper portion and a lower portion by the diffuser plate. This segmentation allows for controlled flow paths and even distribution of exhaust gas across the catalysts, improving operational effectiveness without significantly increasing complexity.
2Productivity
If the inlet and outlet are positioned on the same side of the housing, then the housing length is shorter, but the flow path through the catalysts is less effective
Solution Approach 1:
Instead of positioning the inlet and outlet on the same side to minimize length, the design inverts the conventional approach by placing them on opposite sides of the housing. This inversion creates a more effective flow path through the catalysts, improving treatment efficiency despite the increased housing length.
3Reliability
If exhaust gas flow paths have different lengths, then the housing can accommodate varying flow patterns, but the coefficients of pressure loss become uneven across flow paths
Solution Approach 1:
The diffuser plate is designed to create equipotential flow conditions by ensuring that exhaust gas distributes evenly across all flow paths. This equalizes the pressure loss coefficients across different flow paths, improving reliability while maintaining a manageable inlet chamber configuration.
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
This configuration results in more even coefficients of pressure loss across different flow paths, enhancing the distribution of exhaust gas and improving the conversion of toxic gases, leading to a more efficient treatment process.
Implementation Method 1
a diffuser plate within the inlet chamber that forms a lower portion of the inlet chamber and an upper portion of the inlet chamber, wherein the diffuser plate is to diffuse the exhaust gas through the lower portion of the inlet chamber from a first end of the housing at which the inlet is located toward a second end of the housing at which the outlet is located
Implementation Method 2
a set of catalysts mounted to the mounting plate to facilitate flow of the exhaust gas from the inlet chamber to the outlet chamber
Data Source
AI summary
An aftertreatment module is disclosed. The aftertreatment module may include a housing. The aftertreatment module may include a mounting plate within the housing that forms an inlet chamber and an outlet chamber. The aftertreatment module may include an inlet for exhaust gas from a combustion engine to flow into to the inlet chamber. The aftertreatment module may include an outlet through a top plate of the housing. The inlet and the outlet may be located on opposite sides of the housing and at opposite ends of the housing from each other. The aftertreatment module may include a set of catalysts mounted to the mounting plate. The aftertreatment module may include a diffuser plate within the inlet chamber that forms a lower portion of the inlet chamber and an upper portion of the inlet chamber. The diffuser plate may diffuse the exhaust gas through the lower portion.