|
|
Predicting spark-ignition engine emissions
Jirout, Petr ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with the possibility of predicting emissions of SI engines. The aim was to create an algorithm for predicting unburned hydrocarbons and carbon monoxide, based on ECU signals. The algorithm is based on practical experiments with SI engines. In the summary, the issues and the possible use of the created algorithm following the incorporation of EU7 are outlined.
|
|
|
Application of the Life Cycle Assessment (LCA) method to passenger cars
Šándor, Kristián ; Mišík, Ondrej (referee) ; Fišer, Jan (advisor)
The electrification of personal transport is an intensely discussed and relevant topic in 2023. The motivation behind this master thesis was to compare the lifetime energy consumption of vehicles equipped with internal combustion engines, battery-powered electric systems, and fuel cells. The theoretical part of this master thesis includes the introduction and explanation of the method by which a product lifecycle is assessed, known as LCA. The dissertation includes a chapter detailing the main components of automobiles, followed by a chapter which has calculations the energy consumption of production, operation, and recycling or destruction of the automobiles. The outcome of the theoretical part shows that the lifecycle of a battery-powered electric car is the least energetically costly, followed by internal combustion cars, and fuel cell cars being the most energy costly. The practical part of this master thesis involved a physical decomposition of a vehicle with an internal combustion engine with the aim of obtaining the material composition of its components and applying the LCA method on the vehicle Skoda Octavia III. The thesis sparks future research and eco-friendly alternatives in personal transportation.
|
|
| |
|
| |
|
|
Internal combustion engine for Mars and Moon vehicles
Rachůnek, Radek ; Beran, Martin (referee) ; Svída, David (advisor)
The thesis deals with the development of a mathematical model of the internal combustion engine for vehicles used in space missions. It includes a summary of the historical development and the possible future of the vehicles. It describes the external influences acting on the engine, summarizes the advantages and disadvantages of using an internal combustion engine. A separate chapter focuses on fuel selection with respect to the availability of local resources. The next part of the thesis is devoted to the development of a mathematical model according to a sample real engine. Here, the step-by-step process of modifications to create the engine model is described, considering the information from the previous chapters. The thesis includes an evaluation of the internal combustion engine to see if it represents a suitable alternative to current powertrains.
|
|
|
Supercharging design for a 1.6L SI Engine
Švábíková, Anna ; Bazala, Jiří (referee) ; Beran, Martin (advisor)
This master’s thesis focuses on the problematics of supercharging of SI engines aiming on performance boost. The aim of this thesis is to propose a suitable turbocharger for reaching defined performance goals. A method of successive SI engine modelling process is proposed, using the GT-Power platform. The choice of suitable turbocharger is based on a analytic calculation of required turbocharger parameters. The cooperation of the engine with the chosen turbocharger is verified by simulations. An important part of this thesis is sensitivity analysis, which purpose is to determine the impact of changing chosen parameters on maximum pressure in the combustion chamber and on the exhaust gas temperature.
|
|
|
Electronic supercharger for Formula Student
Matoušek, Patrik ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
The main goal of this diploma thesis is to verify the application of the Electric compressor in the Formula Student monopost category. Diploma thesis is focused on the computational model and analysis of the combustion engine in the GT-POWER software. Outputs from this calculation are used for the design of the main parameters of battery pack. In the final part of the thesis, the monoposts with ordinary turbocharger and with the electric compressor are compared in the lap time simulation in the Autocross discipline.
|
|
|
Increasing the efficiency of an internal combustion engine for small autonomous vehicles
Celý, Martin ; Beran, Martin (referee) ; Svída, David (advisor)
The work deals with the analysis of various possibilities of increasing the efficiency of a small internal combustion engine potentially usable for use in the field of autonomous devices of smaller dimensions. It contains an outline of the problems of modern smaller autonomous means and an analysis of available drives designed for them, especially an analysis of propulsion by internal combustion engines. In his next part of the work he provides information about the created mathematical model of the demonstration internal combustion engine in the GT-Power program and an analysis of places where and in what ways its efficiency can be increased. The design of two such components together with the evaluation of the achieved results offers the conclusion of this work.
|
|
|
Methanol as an alternative fuel
Balcárek, Ondřej ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
This Bachelor thesis is a topic review of problematics of alternative fuel solutions, in particular of methanol and it's production. The aim was to describe properties and possibilities of use of methanol, not only as fuel, but also as a raw material in chemical industry. The information was obtained mainly from English-written sources. Finally, in conclusion part, use and potential of methanol in period of transition to renewable sources is being reviewed.
|
|
|
Brake mean effective pressure of an internal-combustion engine for passengers cars and motorcycles
Vopršal, Oldřich ; Svída, David (referee) ; Drápal, Lubomír (advisor)
The aim of this work is to discuss the meaning, definition and mapping of the characteristics of the value of the mean effective pressure depending on the historical development of internal combustion engines of automobiles and motorcycles from the initial concepts to the current development. In this work I want to compare and evaluate the values of the mean effective pressure for non-supercharged and supercharged piston combustion cars and motorcycles. Part of the work will be a graphical representation of the values of mean effective pressures and subsequent analysis and evaluation of the values against the design concept of the internal combustion engine in the historical period. Furthermore, a description of the structural elements that contribute to the increase of the mean effective pressure.
|
guest ::
