Separable Exhaust Aftertreatment Housing for Compact Serviceability
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Solution Overview
Problem
Existing exhaust aftertreatment assemblies face challenges in servicing and space optimization, particularly in accessing and maintaining particulate soot filters and catalyst elements, which hinders efficient maintenance and compact design.
Innovation Solution
The design incorporates separable housing sections with service joints and a unique outlet plenum configuration that allows for easy servicing of the aftertreatment elements while minimizing space, using band clamps and gaskets for connection and separation, and optimizing the axial extension of the housing to reduce restrictions and enhance accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the housing is designed as a single integrated structure, then structural strength and sealing are improved, but serviceability and accessibility of aftertreatment elements deteriorate
Solution Approach 1:
The housing is divided into multiple separable sections (first housing section and second housing section) that can be detached from each other at service joints. This segmentation allows the aftertreatment elements to be accessed by separating the housing sections, thereby improving serviceability while maintaining structural integrity when assembled. The band clamp connection provides sufficient strength when connected but allows easy disconnection for maintenance.
2Ease of repair
If the housing axial extension is increased to accommodate service joints and separable sections, then serviceability is improved, but overall device length and space consumption increase
Solution Approach 1:
The outlet plenum is configured with a nested structure where the first outlet plenum section is positioned within or adjacent to the second outlet plenum section, allowing compact arrangement of exhaust flow paths. This nesting reduces the overall axial extension of the housing while still providing sufficient space for service joints and separable sections, thereby resolving the contradiction between serviceability and device length.
3Length of moving object
If the outlet plenum configuration is optimized to reduce axial extension, then space efficiency is improved, but exhaust flow restriction may increase
Solution Approach 1:
The outlet plenum utilizes a multi-dimensional configuration where exhaust flow is redirected through radial and circumferential paths rather than purely axial extension. The first and second outlet plenum sections are arranged to provide alternative flow paths that reduce axial length while maintaining adequate flow cross-section, thereby reducing space consumption without significantly increasing exhaust flow restriction.
Data Source
AI summary
An aftertreatment exhaust assembly includes housing sections separable from each other at a service joint axially between axial ends of an aftertreatment element for ease of servicing. The aftertreatment element has an axial end within a housing section saving axial extension space.