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Increasing the efficiency of the diesel engine emission system
Stráník, Daniel ; Fridrichová, Kateřina (referee) ; Böhm, Michael (advisor)
This thesis addresses the issue of emission from heavy-duty vehicles with diesel engine. Perfect combustion in the engine is unattainable, leading to the inevitable production of pollutants during diesel combustion that must be effectively eliminated. Emission systems are used to reduce pollutants present in exhaust gases. As emission limits continue to decrease, and with the impending introduction of the new Euro VII emission standard, it is still important to reduce emission from internal combustion engines. This is particularly significant as electric and other alternative drives are not yet sufficiently developed for heavy-duty vehicles. This thesis proposes a strategy for achieving the greater reduction of pollutants and the desired increase in the efficiency of the entire emission system. For this purpose, a numerical model was created using GT-Suite software, and simulations were conducted to replicate the WHSC and WLTC class 1 driving cycles for the simulation of steady and transient states. The emissions resulting from the modified emission system were compared with those from the default system. The conclusion of the thesis is a brief description and evaluation of the results, accompanied by an outline of potential future procedures.
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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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Catalytic converter and particulate filter functions on diesel vehicles
Šišpera, Adam ; Beran, Martin (referee) ; Bazala, Jiří (advisor)
Tato bakalářská práce se zabývá představením dieselových emisně-redukčních systémů široké veřejnosti, odkrývá základní principy funkce dieselova motoru, mechanismy vzniku emisí a následně se věnuje jejich regulaci za pomocí katalytické redukce a filtru pevných částic. Odhaluje, proč je provozní teplota pro funkčnost těchto systémů klíčová a prezentuje možnosti, jak ji regulovat. V závěru pojednává o možnostech snížení uhlíkové stopy a vyhovění nadcházející emisní normě EURO VII.
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Unit Injectors
Cihlář, Lukáš ; Drápal, Lubomír (referee) ; Dundálek, Radim (advisor)
This bachelor’s thesis deals with the description of unit-injector system. Injection system used in passenger cars as well as Unit-Pump-System used in trucks is described. One chapter deals with general problems of emissions, including description systems of the reduction exhaust gases. In the end is the practical application of the system in the engines of the Volkswagen Group.
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Engines of Octavia vehicles
Malchárek, Miroslav ; Vopařil, Jan (referee) ; Píštěk, Václav (advisor)
This bachelor thesis deals with popular car Škoda Octavia and combustion engines used in it. Thesis is divided into three chapters. The first chapter deals with a development of Škoda Octavia car. The second chapter approaches diesel engines used. The third chapter treats of commonly used combustion engines.
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