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Analýza funkční životnosti filtrů pevných částic spalovacích motorů
Obršlík, Jaroslav
The diesel engine emissions belong nowadays to most monitored issues, especially when it deals with the fine particles and their elimination from the exhaust fumes using the particle filters. This thesis deals with the reliability and durability of particle filters measured in the emissions of exhaust fumes. The thesis describes the different types of particle filters and methods of their regeneration. The individual measuring device has been described in order to comprehend all the processes that take place during the measurement. The author used mathematic methods to evaluate the income variables. In its practical part the thesis has evaluated – by using the statistical methods – the reliance of measured quantities in the exhaust fumes.
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Determination of emissions and harmful particles of exhaust gases of CNG, petrol and diesel vehicles
Rozsíval, Adam ; Libich, Jiří (referee) ; Bača, Petr (advisor)
The thesis deals with an analyses of emission and harmful particles of exhaust fumes of automobiles with an environmental impact. More precisely, it describes the basic characteristics of current fuel types and emission produced by internal combustion engines. Next, it deals with the measures and possibilities of decreasing car traffic emission with respect to environmental impact. It also describes the current European standards for emission and the systems of the cars that are able to decrease emission. The work also deals with the measuring of emission and the methods that are used. According to the measuring methods, the analysis of exhalation is done and it is based on the data of the real car fleet. Values of the emission analyses are compared. The financial aspect is a part of the analyses.
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Stanovení základních emisí z výfuků osobních vozidel ve vybraných úsecích dopravní trasy
KAHUDA, Jan
This diploma thesis deals with the issue of environmental pollution caused by the production of harmful substances originated from the automobile combustion engines and the calculation of production of basic pollutants emitted from the passenger car exhausts travelling on selected sections of transport route. The aim of the work was to calculate the amount of emitted harmful substances, according to the composition of the vehicle fleet on some selected monitored sections of transport routes. For analysis were selected three stretches of roads in České Budějovice. The analysis considered the vehicle fleet composition, determination of traffic intensity, average speed of vehicles and traffic fluency on the transport routes. The calculated values were obtained using the special software MEFA 13
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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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Determination of CO2 exhaust emissions for CNG, petrol and diesel vehicles
Chytil, Ivo ; Libich, Jiří (referee) ; Bača, Petr (advisor)
The thesis deals with the topic of Carbon dioxide emissions that are created by Petrol, Diesel and CNG vehicles. In the first part of the thesis, the results of theoretical calculations are compared with the values of the manufacturer of the specific vehicle. In the second part, a specific method has been selected for calculations with real data from transport. The savings of CO2 produced by the specific vehicle are expressed in percentage – depending on the fuel used. The operating expenses from the real data are calculated and compared with hybrid and electric vehicles. In the final part of the thesis, the ratio of fleet type vehicles to the financial/ecological aspect was proposed.
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Porovnání emisních norem výfukových plynů u vybrané skupiny traktorů
OPEKAR, Jiří
The aim in this thesis is to provide a comparison of smoke levels among John Deere 6 Family four-cylinder tractors. The comparison group consisted of 5 tractors, each with a different year of production. The aim is to ascertain if the systems provided in new John Deere tractors show higher efficiency in reducing emissions than those in older tractors. Further, the thesis deals with particular substances emitted by compression ignition engines and their influence on humans and the environment. Furthermore, basic information is provided about European and US standards as well as ways to reduce to the minimum these harmful substance emissions from compression ignition engines to the atmosphere. Diagnostic instruments for measuring exhaust gas emissions from compression ignition engines are described. Further, the thesis contains characteristics of tractors in the study group and results of measurements, arranged in tables and in graphs. Lastly, the results are evaluated and conclusions are made for practice.
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European emission legislation
Rytina, Matěj ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
The aim of this bachelor thesis was to write about exhaust emissions and their influence on environment, briefly sum issue of emission standards up and mainly sum existing facts about the “Dieselgate” affair up. I wanted to objectively evaluate this issue in my bachelor thesis. Asset of this thesis was mend to be in fact that this affair has not been academically covered yet.
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Intake Ports for the Wankel Engine
Smělý, Jiří ; Beran, Martin (referee) ; Svída, David (advisor)
This master’s thesis deals with design of intake port for turbocharged Mazda 13B-T engine with Wankel-type rotating piston motion aiming for possible modifications leading to increase of performance parameters. The main objective of this thesis is to propose appropriate modifications in order to achieve increased torque in widest possible engine speed range.
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Měření emisí pevných částic u vznětových motorů rozdílných emisních kategorií EURO
KAHUDA, Jan
This bachelor thesis deals with the issue of pollution of the environment by emissions of dust particles produced by engines of cars and also deals with the measurement of the concentration of dust particles emitted in the exhaust gases of diesel engines meeting the different EURO emission categories. Dust particles greatly pollute the environment and endanger human health as well as the lives of other animals and plants. The aim of this work was to find out the difference in the producing of dust particles in the exhaust gases of passenger car's diesel engines that meet the different emission EURO standards. Measurements were carried out using experimental preparation of own production - the measuring station. The dust particles concentration measurement was performed on four diesel engine passenger cars that meet the EURO 1, EURO 3, EURO 5 and EURO 6 emissions standards and while idling. The measuring device DUST TRAK 8530 from the TSI Incorporated company was used for measuring.
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Optimization of Gases Flow in Exhaust System of Tractor Engine
Létal, Filip ; Svída, David (referee) ; Dundálek, Radim (advisor)
The subject of this thesis is to optimize the flow of exhaust gases in the particle filter using CFD simulations. The first part is focused on the emissions of diesel engines and emissions reduction systems with a focus on particulate filters. The next section is an analysis of the current state of the specified particle filter using CFD simulation and evaluation following with a proposal of new construction for better flow distribution. At last, the final evaluation is presented.
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