Integrated Emissions Cleaning Module Mounting Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current emissions cleaning technologies for internal combustion engines are inadequate in effectively treating hydrocarbons, carbon monoxide, and nitrogen oxides in exhaust gases, requiring additional modules like DOC and SCR systems, and there is a need for improved methods to manage these pollutants efficiently.
Innovation Solution
The emissions cleaning module integrates a diesel oxidation catalyst (DOC) module, a selective catalytic reduction (SCR) module, and an AMOX module, along with a mixing element and flowhood design that promotes efficient mixing and catalytic reactions, using catalysts like palladium and platinum, and urea/ammonia to convert pollutants into harmless gases like CO2, N2, and H2O.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate emissions cleaning modules (DOC, SCR) are used to treat different pollutants, then the treatment effectiveness for each pollutant is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent combines DOC and SCR modules into a single integrated emissions cleaning module with a common housing, allowing multiple pollutant treatment functions to be performed in one compact unit rather than requiring separate modules for each treatment function
Solution Approach 2:
The integrated module performs multiple functions (hydrocarbon oxidation, carbon monoxide oxidation, nitrogen oxide reduction) within a single device that houses both DOC and SCR catalysts and pathways, making the system multi-functional and reducing overall complexity
2Productivity
If catalysts are distributed throughout the exhaust flow path, then the catalytic reaction efficiency is improved, but the manufacturing precision and assembly difficulty increase
Solution Approach 1:
The catalyst system is segmented into distinct DOC and SCR functional zones within the housing, with each zone containing appropriate catalysts positioned at specific locations to optimize their respective reactions while maintaining overall efficiency
Solution Approach 2:
Different catalyst types and concentrations are placed in specific local zones within the housing - DOC catalysts in one area for hydrocarbon and CO oxidation, SCR catalysts in another area for NOx reduction - ensuring each region has the quality needed for its specific function
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 integrated approach significantly reduces hydrocarbons, carbon monoxide, and nitrogen oxides in exhaust gases, enhancing the efficiency of emissions treatment and meeting stringent emissions regulations by optimizing catalyst distribution and reaction pathways.
Implementation Method 1
an oxidation device, such as a diesel oxidation catalyst (DOC) module, to reduce or to eliminate hydrocarbons (HC) and/or carbon monoxide (CO). Oxidation devices generally include a catalyst to convert those substances into carbon dioxide and water.
Implementation Method 2
it is known to reduce or eliminate mono-nitrogen oxides (NO x ) in diesel combustion emissions by conversion to diatomic nitrogen (N 2 ) and water (H 2 O) by catalytic reaction with reductant chemicals such as ammonia (NH 3 ) entrained in the exhaust gas.
Implementation Method 3
typically by injecting a urea solution into the exhaust gas which decomposes into ammonia at sufficiently high temperatures.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An emissions cleaning module (1) is provided comprising a first conduit (2) containing a diesel oxidation catalyst (DOC) module and a second conduit (4) containing a selective catalytic reduction (SCR) module. A mounting mechanism (6; 110) is provided for mounting the emissions cleaning module to an external support, which may be, for example, a chassis of a vehicle or an engine component. The second conduit (4) is mounted to the mounting mechanism and the first conduit (2) is mounted to the second conduit.