Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Exhaust after-treatment"”.
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Development and application of a channel-scale exhaust after-treatment model
… and investigation of rare behaviours of exhaust after-treatment systems. Firstly, the performance of the model is critically assessed for various after-treatment devices against literature data, including a diesel oxidation catalyst (DOC), a selective catalytic reduction (SCR) device and …
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System modeling, analysis, and optimization methodology for diesel exhaust after-treatment technologies
Developing new aftertreatment technologies to meet emission regulations for diesel engines is a growing problem for many automotive companies and suppliers. Balancing manufacturing cost, meeting emission performance, developing competitive engine power, reducing weight and operational costs are all …
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Exhaust after-treatment systems modelling to develop new technologies and support ECU calibration in off-road diesel engines
L'abstract è presente nell'allegato / the abstract is in the attachment
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Performance evaluation of exhaust aftertreatment devices used for emissions control on diesel engines employed in underground coal mines
… coal mines. Four different engines and various exhaust after treatment devices that represent current levels of in-use technology were selected for performance evaluation. Both eddy-current and water-brake dynamometers were used to load the engines according to an ISO 8-Mode test cycle. …
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Spatio-Temporal Dynamics of Reaction Zones in Catalytic Monolith Reactors
Catalytic monolith reactors are widely used in exhaust after-treatment systems. Unlike traditional chemical reactors which are commonly operated around certain steady-states, monolith reactors are almost always in transient states due to the nature of their applications. In this work, we studied …
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Low-dimensional Models for Real-time Simulation of Internal Combustion Engines and Catalytic After-treatment Systems
… i.e. in-cylinder combustion processes, exhaust after-treatment systems, mechanical and electrical systems (for hybrid vehicles) and sensor and control systems. In this work, we develop a four-mode low-dimensional model for the in-cylinder combustion process in an internal combustion …
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Control strategy for hydrocarbon emissions in turbocharged direct injection spark ignition engines during cold-start
… slows down activation (warm-up) of the catalytic exhaust after-treatment system. The objective of this research is to find a control strategy that: 1. Accelerates warm-up of the catalyst, and 2. Maintains low emissions of unburned hydrocarbons (UBHCs) during the catalyst warm-up process. This …
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Evaluation of advanced air-fuel ratio control strategies and their effects on three-way catalysts in a stoichiometric, spark ignited, natural gas engine
… A three-way catalyst (TWC) is a cost-effective exhaust after treatment system can be used to reduce pollutant emissions through a series of reactions that are catalyzed by special conditions within the catalyst. Using TWCs, emissions can be drastically reduced using simple chemical reactions, …
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Experimental Studies of Diesel Particle Filtration
… of the diesel particle filter (DPF) in engine exhaust systems to limit emissions of combustion-generated particles. The collection of particulate matter in exhaust after-treatment devices depends on a number of mechanisms for aerosol particle deposition that are analysed in the first part of …
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Combustion quality and regimes for standard and alternative fuels
… have performed visualization of this phenomenon. Exhaust particulate matter from CNG/diesel dual-fuel combustion was also studied and characterized for the first time using materials research techniques such as Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA), CHN elemental …