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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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Application of Pressure Accumulator Injection System on CI Engine
Šiška, Adam ; Štěpánek, Karel (referee) ; Dundálek, Radim (advisor)
This master’s thesis deals with building the most modern injection systém Common-Rail for four-cylinder tractor diesel engine. The following application is a conversion from a obsolete system with inline injection pumps. Because the costs for this conversion must be minimized, that it is effort of minimal intervention in engine design. First this master’s thesis focuses on the theory of injection systems of diesel engines and related things and then the thesis shows the design conversion supported analytical calculations and FEM analysis of newly designed components.
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Technology of Selective Catalytic Reduction
Kudlík, Michael ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is focused on technology of selective catalytic reduction. The technology was created as a result of introduction of strict emission limits which manufacturers with this technology reach. First part of this thesis deal with the composition of the exhaust gases, where are dismembered the various elements, and then are given here the European emission limits.Then is thesis focused on ways of reducing emissions of diesel engines which describes the function of exhaust gas recirculation and a function of selective catalytic reduction. Then are described development systems selective catalytic reduction. The conclusion consists of the use and application of Automobile Manufacturers.
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Emission Standards
Nevtípil, Jakub ; Prokop, Aleš (referee) ; Dundálek, Radim (advisor)
This bachelor’s thesis deals with the European emission standards of internal combustion engines. There is a tightening of standards in recent year generally. The former part of the thesis contains description of specific pollutants that are exhaled into the air. The second part is focused on main emission standards for road and non-road engines. The last chapter deals with an overview of the ways and appliances for reducing the emissions.
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