Parallel Exhaust Gas Treatment Module with Nested Mixing Sections
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Solution Overview
Problem
Existing exhaust gas treatment modules for internal combustion engines are inefficient in reducing pollutant emissions due to non-compact designs and suboptimal arrangements of mixing and treatment sections, which hinder effective catalytic reactions and space utilization.
Innovation Solution
A compact exhaust gas treatment module design featuring two sets of mixing and treatment sections arranged in a parallel or overlapping configuration, with flow deflection housings to facilitate efficient mixing and catalytic reactions, allowing for a compact and efficient use of space while ensuring effective pollutant reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If mixing sections and exhaust gas treatment arrangements are arranged sequentially in series, then the flow path is simple, but the module occupies excessive space and lacks compactness
Solution Approach 1:
The patent implements nesting by placing the first mixing section (20) and second mixing section (24) inside the longitudinal extent of the first exhaust gas treatment arrangement (22) and second exhaust gas treatment arrangement (26), respectively. This allows the mixing sections to be spatially contained within the treatment sections' longitudinal boundaries, creating a compact nested configuration that reduces overall module volume while maintaining functional separation.
Solution Approach 2:
The patent transitions from a purely sequential one-dimensional arrangement to a three-dimensional configuration where mixing sections and treatment sections are interlaced in space. The first mixing section is positioned within the longitudinal extent of the first treatment arrangement, and the second mixing section within the second treatment arrangement, creating a spatial interlacing pattern that optimizes space utilization.
2Volume of moving object
If mixing sections are positioned within the longitudinal extent of treatment arrangements, then compactness is achieved, but flow connection complexity increases
Solution Approach 1:
The patent divides the exhaust gas treatment module into distinct functional segments: first mixing section (20), first exhaust gas treatment arrangement (22), second mixing section (24), and second exhaust gas treatment arrangement (26). Each segment is spatially separated and functionally independent, with standardized inlet/outlet connections. This segmentation allows complex flow patterns to be managed through simple, standardized interfaces between segments.
3Volume of moving object
If multiple exhaust gas treatment arrangements are arranged parallel to each other, then space utilization improves, but the risk of flow distribution issues increases
Solution Approach 1:
The patent creates distinct local flow environments for each treatment arrangement. The first exhaust gas treatment arrangement (22) receives exhaust gas directly from the first mixing section (20), while the second exhaust gas treatment arrangement (26) receives exhaust gas from the second mixing section (24). Each arrangement has its dedicated inlet channel and flow path, ensuring uniform and reliable flow distribution without interference from adjacent arrangements.
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 design enhances the efficiency of pollutant reduction by optimizing the arrangement of mixing and treatment sections, achieving a more compact and effective exhaust gas treatment system that reduces pollutant emissions from internal combustion engines.
Implementation Method 1
carry out a selective catalytic reduction in an SCR catalyst arrangement downstream of the injection point, which leads to a reduction in the nitrogen oxide content
Implementation Method 2
a first mixing channel elongated in the direction of a first mixing section longitudinal axis
Data Source
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AI summary
An exhaust gas treatment module (12) for an exhaust system of an internal combustion engine comprises, in an exhaust gas flow direction, a first mixing section (20) with a first reaction agent discharge arrangement (42) in an upstream end region of the first mixing section (20) and a first mixing channel (28) elongated in the direction of a first mixing section longitudinal axis, a first exhaust gas treatment arrangement (22) elongated in the direction of a first exhaust gas treatment arrangement longitudinal axis with an upstream end region connected to a downstream end region of the first mixing section (20), a second mixing section (24) with a second reaction agent discharge arrangement (86) in an upstream end region of the second mixing section (24) connected to a downstream end region of the first exhaust gas treatment arrangement (22) and a second mixing channel (84) elongated in the direction of a second mixing section longitudinal axis,a second exhaust gas treatment arrangement (26) elongated in the direction of a second exhaust gas treatment arrangement longitudinal axis, comprising an upstream end region connected to a downstream end region of the second mixing section (24) and a downstream end region open for the discharge of exhaust gas and/or reaction agent, wherein the first mixing section longitudinal axis, the first exhaust gas treatment arrangement longitudinal axis, the second mixing section longitudinal axis and the second exhaust gas treatment arrangement longitudinal axis are substantially parallel to each other and/or to an exhaust gas treatment module longitudinal axis (L), and/or wherein the first mixing section (20), the first exhaust gas treatment arrangement (22), the second mixing section (24) and the second exhaust gas treatment arrangement (26) overlap each other at least partially in the direction of the exhaust gas treatment module longitudinal axis (L).