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The DPF and SCR systems
Novodomský, Tomáš ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
The presented bachelor thesis deals with exhaust emission reducing systems for diesel engines. The first part is devoted to the composition of exhaust gases and emission standards. The thesis analyses the formation of solid particles, their regulation by the DPF system and its various variants. Further the principle of reducing the nitrogen oxide content in the exhaust gases by the selective catalytic reduction system is described. In the final part, there is a reflection on the future of emission reduction systems, emission standards and alternative drives.
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Technology sputtering of flue-gas
Hladík, Petr ; Brázdil, Marian (referee) ; Hrnčířová, Michaela (advisor)
The object of this bachelor’s thesis is to create a research in field of flue gas scrubbing technology. In the first part, there are briefly outlined issues of size and shape of particles present in flue gas after combustion. Next part focuses on basic general characteristics of separators. Main part treats of individual types of separators. Following chapters deal with emission limits in Czech Republic and future development of the field. Thesis is concluded by sample calculation of the cyclone separator.
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Stress-strain Analysis of Diesel Particulate Filter Support on Tractor Zetor Forterra
Kučera, Petr ; Ramík, Pavel (referee) ; Dundálek, Radim (advisor)
The subject of this master's thesis is the FEM analysis of the construction of the diesel particulate filter support on the tractor Zetor Forterra. The introduction of this thesis is about the theoretical part dealing with the issue of emissions from diesel engines and ways to reduce them. The following part describing the creation of the computational model. Then, the static stress-strain analysis, modal analysis and fatigue analysis are solved in the ANSYS Workbench software. The assessment of the safety of the structure in terms of limit states, that may occur during the operation of the tractor, based on the results of calculations is in the conclusion of the thesis.
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Gasoline Particulate Filters
Kadlček, František ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This research deals with particulate matter, its origin and harmfulness, focusing on filters that trap these carcinogenic particles from exhaust gases. The work also lists emission stand-ards that affect the requirements for filtering efficiency of the equipment. Furthermore, the functions of specific components are described and the principle of filter regeneration is explained.
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Diesel Particulate Filters
Haratek, Marek ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is focused on creation of particulate matter during combustion in diesel engines and their trapping in DPF systems. The first part deals with particulate matter and emission standards in Europe and USA. There is described filtration principle, types of regeneration and DPF variants in the second part. Afterwards the thesis is concentrated on particular DPF system applications used by representative car makers and there is also introduced range of products of some diesel particulate filter manufacturers, including description of construction variants and used regeneration technologies.
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DPF for CI Engines
Hanák, Jiří ; Řehák, Kamil (referee) ; Dundálek, Radim (advisor)
This bachelor thesis describes formation of harmful particles during combustion cycle of diesel engine and blocking its spreading into atmosphere using diesel particulate filters. First part of this thesis looks into types and mechanisms of formation of these particles including regulations of its maximal value in atmosphere thanks to emission regulations. Then this thesis summarizes principles of diesel particulate filters´ functioning, their types, methods of construction and regeneration. Also, there are described systems of diesel particulate filters with diesel engine and practical solutions. In conclusion, this thesis deals with problematic combinations of diesel particulate filters and diesel engines and outlines possible future development.
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Influence of traffic volume and meteorological conditions on the air pollution
Vojtěchová, Ivana ; Kotlík, Josef (referee) ; Adamec,, Vladimír (advisor)
Transport, whose intensity year by year increase, has assuredly influence on air quality. This issue solution will be focused especially on localities burden with transport in urban areas. The contribution of transport to increased values of air pollution will be evaluated with regards to meteorological conditions. Background stations from Czech Hydrometeorological Institute categorization will be chosen such as comparative sites. Pollutants emitted from traffic such as particulate matter, nitrogen oxides and carbon monoxide will be observed except meteorological conditions.
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Gasoline Particulate Filters
Vyhnálek, David ; Řehák, Kamil (referee) ; Dundálek, Radim (advisor)
This bachelor thesis deals with gasoline particulate filters for spark ignition power trains and aims to summarize the current state of knowledge and prospects of this issue. The first part of the thesis focuses on gasoline direct injection technology as it is directly responsible for the increased formation of particulate matter, which is also subject of attention, including other pollutants. It also addresses the reason for the need of usage and further development of filters, the principle of operation and design options, including a description of the individual components. The thesis also discusses possible perspectives for the future development of turbocharged petrol engines with regards to meeting emission standards.
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