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An aftertreatment system for the passenger vehicles with a gasoline engine
Hána, Michal ; Fridrichová, Kateřina (referee) ; Böhm, Michael (advisor)
This thesis concentrates on the issue of reducing emissions from passenger vehicles with a gasoline engine. The introduction describes the individual emission components, their origin and impact on the environment and human organism. The main part of the thesis concentrates on possibilities of reducing emissions. The function and design solution for each component of the emission system is described. Furthermore, the specific solutions for several selected representatives from diverse vehicles categories are stated. These solutions are evaluated and custom configuration is designed given the selected parameters. In the conclusion are summarised the results of the thesis.
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An emission reduction systems for vehicles with gasoline engines
Filip, Josef ; Fridrichová, Kateřina (referee) ; Böhm, Michael (advisor)
This bachelor thesis deals with ways for emission reduction of passenger cars with an ignition engine. The introduction describes the principle of combustion, the methods of preparation of the ignition mixture and pollutants that arise during the combustion. In the main part of the work, the individual specific provisions for reducing emissions used in modern vehicles are analyzed in detail. Further the examples of current emission systems for several selected cars are presented. All the findings are summarized in the following chapter. In the next part, own configuration of the emission system is described in detail, which is designed with the regard to maximum efficiency in reducing emissions. The summary together with the evaluation of the current situation and the outline of the possible direction for further development in this area are in the last part of this work.
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The concept of electric motors used in vehicles
Polnický, Vít ; Repka, Martin (referee) ; Böhm, Michael (advisor)
This bachelor’s thesis deals with the description of electric drives concepts in current vehicles. In the first part, the basic principle of the electric motor is explained, and different types of electric motors are described in detail. In the next part of the thesis, the electrified vehicles are divided into three groups according to the power share of electric motor for vehicle propulsion. The groups are further subdivided according to the powertrain arrangement in the vehicle, indicating the advantages and disadvantages of each concept. In the third part, specific vehicles from each group are presented and compared in terms of performance, range and price. Finally, the concepts are evaluated and a possible development is outlined.
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Spark-ignition engine concept for hybrid passenger car
Břoušek, Roman ; Böhm, Michael (referee) ; Drápal, Lubomír (advisor)
Thesis aims on calculating method of engine conception for hybrid power train usage. Aim is to describe briefly overview of common combustion engines in hybrid power trains of the passenger cars. According this overview a proposal of naturally aspirated spark ignition combustion engine by specified parameters in 1-D CFD will be made, while the effort is to take into account less complexity and production costs at the same time higher efficiency in the most load modes.
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Conceptual design of the conversion of an electric motorcycle
Roman, David ; Zeizinger, Lukáš (referee) ; Böhm, Michael (advisor)
The work is about the study of the current offer of electric motorcycles, individual structural elements, and the concept of using an electric motor and battery. Furthermore, the work compares the operating costs of conventional internal combustion engines and electric motors. The main part of the work is the calculation of the battery capacity for the motorcycle, which is converted from a conventional internal combustion engine to an electric motor and the selection of a suitable engine and battery storage concept, so that the dynamics of the motorcycle is not significantly affected.
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Apex Seal for Wankel Engine
Böhm, Michael ; Ramík, Pavel (referee) ; Svída, David (advisor)
The master’s thesis deals with analysis of sealing elements of Wankel engines and their design. The necessary steps for creation of the model of dynamics of apex seal are provided, whereby the resulting force loads are then obtained. Furthermore, the design of the apex seal spring, the choice of the material and the production jigs for the production of the spring itself are presented. The finished components are tested in the engine testing laboratory and the results evaluated.
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Thermodynamic of Atkinson and Miller cycle
Böhm, Michael ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
In the bachelor thesis is performed a basic thermodynamic analysis of combustion engines cycles. For every cycle there is also a design for a real combustion engine. Subsequently, the Atkinson and Miller cycles are compared to the ideal Otto cycle with supercharger and without it in terms of thermal efficiency for the same input parameters. The results are evaluated and the use of the Atkinson and Miller cycle in motor vehicles is explained. Next, there are specific car representatives, which use these cycles and the development trends of modern cars.
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Infrastructure for electromobility
Smutková, Karolína ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
This thesis deals with the issue of charging electric vehicles, including a number of sub-questions. It provides an overview of current charging stations, connectors, communication between vehicle and charger during charging and of the resulting price for charging. It also takes into account the need for large amounts of energy mostly from renewable sources, coupled with battery storage facilities. The last point is a comparison of current electric vehicles mainly by battery capacity, price and range. The whole thesis is primarily related to the territory of the Czech Republic.
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Dieselgas Engines
Březina, Tomáš ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with the topic of Dieselgas engines. The first part work is focused on the history and development of engines and motor fuels. The second part deals with diesel engines, a description of the engine operating cycle, fuel injection system, types of diesel fuel, engine efficiency and emissions. The following chapter provides an overview of gaseous fuels suitable for passenger and public transport. Of these fuels, the two most commonly used are further elaborated. The fourth chapter deals with the use of gaseous fuels in diesel engines, the possibility of conversion of these engines, both by conversion to petrol and without this change. The last chapter deals with the effect on consumption and emissions of dual fuel engines.
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