Parallel Exhaust Aftertreatment via Nested Decomposition Chambers
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Solution Overview
Problem
Existing exhaust gas aftertreatment systems face challenges in efficiently treating exhaust gas in two or more flow paths concurrently due to space constraints, which limits their application in certain environments.
Innovation Solution
The exhaust gas aftertreatment system incorporates two treatment fluid delivery systems, two decomposition chambers, and multiple conversion catalyst members, allowing for the treatment of exhaust gas in two parallel flow paths within a compact housing assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If exhaust gas is routed through two or more flow paths concurrently to enhance emission reduction, then emission reduction efficiency is improved, but space claim significantly increases
Solution Approach 1:
The patent implements nested decomposition chambers where the second decomposition chamber is positioned within or around the first decomposition chamber. The first conversion catalyst member is nested within the first decomposition chamber, and the second conversion catalyst member is nested within the second decomposition chamber. This nesting arrangement allows multiple flow paths to coexist in a compact configuration, enabling enhanced emission reduction through parallel processing while maintaining a reduced space claim.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by positioning decomposition chambers and catalyst members at different vertical and horizontal levels. The exhaust gas inlet is positioned to distribute gas across multiple chambers simultaneously, creating parallel flow paths that utilize vertical and horizontal dimensions. This dimensional approach allows concurrent multi-path processing without proportionally increasing the overall system volume.
2Productivity
If multiple decomposition chambers and dosing modules are added to enable parallel flow paths, then treatment efficiency is improved, but device complexity increases
Solution Approach 1:
The patent employs multiple dosing modules that can deliver different treatment fluids (such as urea solution and diesel exhaust fluid) to different decomposition chambers. Each dosing module is configured to provide specific treatment fluids based on the requirements of each flow path, enabling flexible and optimized emission treatment. This multi-functionality allows the system to handle diverse exhaust compositions and treatment requirements within a unified architecture, improving treatment efficiency while managing complexity through standardized modular components.
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 enhances the efficiency of exhaust gas treatment, reduces emissions, and allows for faster attainment of the 'light-off' temperature, making it more suitable for space-constrained applications.
Implementation Method 1
The first decomposition chamber is configured to receive an exhaust gas. The first dosing module is coupled to the first decomposition chamber and configured to provide a first treatment fluid into the first decomposition chamber.
Implementation Method 2
The first conversion catalyst member is configured to receive a mixture of the first treatment fluid and the exhaust gas, from the first decomposition chamber.
Implementation Method 3
The first dosing module is coupled to the first decomposition chamber and configured to provide a first treatment fluid into the first decomposition chamber.
Data Source
AI summary
An exhaust gas aftertreatment system includes: a first decomposition chamber; a first dosing module coupled to the first decomposition chamber and configured to provide a first treatment fluid into the first decomposition chamber; a first conversion catalyst member; a second decomposition chamber; a second dosing module coupled to the second decomposition chamber and configured to provide a second treatment fluid into the second decomposition chamber; a second conversion catalyst member; and a third conversion catalyst member.