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Improving Performance of Turbocharged CNG Engine
Janoušek, Michal ; Beran, Martin (referee) ; Svída, David (advisor)
The aim of diploma thesis is the design of fuel system for the Caterpillar twelve cylinder spark ignited turbocharged engine. The fuel system is designed for sequential electronic controlled gas injection into intake manifold. Computational model of the engine was calculated in Lotus Engine simulation software. CFD analysis of mixing CNG with air was computed in Star CCM+ software.
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Environmental aspects of CNG vehicles
Raiskup, Martin ; Kučera, Pavel (referee) ; Vopařil, Jan (advisor)
This bachelor‘s thesis is focused on matter of environmental aspects of cars powered by CNG. At first natural gas is introduced as a fuel for combustion engines. In the next step pros and cons are evaluated. Then there are described individual combustion systems and components of engine powered by natural gas. The main part of this thesis is focused on ecology. There is mentioned the impact on environment, comparing the impact of natural gas with other conventional fuels. This comparison is realised through the more objective Well to Wheels analysis as well.
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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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Hydrogen fuels
Umlauf, Martin ; Bébar, Ladislav (referee) ; Jícha, Jaroslav (advisor)
Paper presents a basic review and comparison of energy-conservation made of renewable sources. Principal question of paper concerns evaluation of hydrogen-use made of electrolysis of water. First part of the thesis focuses on the production of energy from renewable sources and the possibility of energy-accumulation. The next section describes methods of hydrogen production and utilization of hydrogen as a fuel for combustion engines. Attention is paid to various aspects dealing with construction of combustion engines using hydrogen. Final part of the study presents comparison between combustion engines using known sorts of fuels as to their pollution and emission-level. Next comparison deals with economic cost per kilometer, when different sort of fuels are taken into account. Conclusion concerns approximate calculation of the production of hydrogen from water by electrolysis using photovoltaic power plants.
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Increase of Charging Efficiency of 140kW CNG Engine
Hadrava, Martin ; Vančura, Jan (referee) ; Svída, David (advisor)
The master’s thesis is focused on flow analysis work filling in turbocharged CNG engine. The research method is reverse engineering. The intake canal is casted and than scanned by 3D Scanner ATOS. The CAD model is created in program Creo Parametric 2.0. In the created interactive model is simulated flow in the CFD program Star CCM +. The air intake system is modified for increasing the charging efficiency of the engine.
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Future Trends for Passenger Car Powertrains
Bureš, David ; Drápal, Lubomír (referee) ; Novotný, Pavel (advisor)
This bachelor thesis analyses existing and potential future propulsion technologies in passenger cars. Propulsion technologies are evaluated based on their efficiency, emissions, and amount of vibration. They are then compared with propulsion technologies in current use. Probability of usage from 2020 to 2040 is predicted for each evaluated technology.
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Alternative Fuel Engines
Mišelnický, Lukáš ; Svída, David (referee) ; Dundálek, Radim (advisor)
Bachelor thesis describes the engines to alternative fuels. There are presented different types of fuel properties and engine modifications so that the fuel can burn. In conclusion, the overall assessment of the prospects for future development
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Utilization of biogas in transport
Strnadel, Bronislav ; Kučera, Pavel (referee) ; Vopařil, Jan (advisor)
The subject of this bachelor’s thesis is the utilization of biogas as a fuel for vehicle engines. First of all, methods of production, upgrading and utilization of biogas are explained. Then the situation in the Czech Republic and in Sweden is compared. Next part of the thesis is focused on the vehicles which burn upgraded biogas or natural gas vehicles. Their construc-tion and the function of fuel system are described in detail. The dependence of shape of combustion chamber on engine performance and the issue of protection of valves and their seats are described in this chapter. In the last part, a business case study of utilization of bio-gas from a biogas station is elaborated.
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