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Design of the central housing for very low turbocharger support - sideways oil output
Slovák, Jan ; Novotný, Pavel (referee) ; Knotek, Jiří (advisor)
This diploma thesis is about lowering installation height of turbocharger without significant increase of the oil pressure inside the housing at the piston rings. At the beginning of the thesis is research about supercharging and turbocharging, construction and parts that are placed inside a turbocharger. Next chapter is short brief about CFD. Further chapters are about design and changes at the central housing and about simulations. From simulations were the results obtained.
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Analysis of turbocharger waste gate
Ondrejka, Adam ; Pohorelský,, Luděk (referee) ; Hadaš, Zdeněk (advisor)
The aim of master’s thesis was to put forward calculation methodology of wastegate turbocharger bypass channel discharge coefficient. Designed methodology was based on discharge coefficient analysis conducted utilizing CFD simulations of turbocharger turbine-side parametric model. It was achieved to propose a calculation, which differentiates relatively in average 1,4% from CFD data. New methodology improves the accuracy bypass channel design and helps to choose appropriate wastegate valve actuator.
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Modern trends in engine forced induction
Podhora, David ; Zubík, Martin (referee) ; Knotek, Jiří (advisor)
The goal of this bachelor thesis is to summarize the fundamental knowledge about supercharging the combustion engines, whereas the emphasis is on the modern trends of this branch. The first two chapters are aiming at the basic principles and reasons for using the supercharging method. Further on, this thesis explains the individual elements of supercharging systems and their possible arrangement. The last part is disserting on the most actual modern trends at supercharging of the combustion engines.
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INSTALLATION REGENERATIVE EQUIPMENT INTO A VEHICLE
Svršek, Michal ; Kučera, Pavel (referee) ; Vopařil, Jan (advisor)
The aim of this bachelor thesis is to prepare an overview of current knowledge and trends in energy recovery system of motor vehicles. The content is primarily a function of basic system, components and recovery of kinetic and thermal energy. The next section deals with the built-in specific device in a vehicle with an evaluation in terms of economic and environmental returns.
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Formula Student Turbocharger Lubrigation
Novotný, Tomáš ; Špičák, Milan (referee) ; Janoušek, Michal (advisor)
This bachelor thesis deals with turbocharger´s bearing housing lubrication. The first part is focused on searches about this topic, it describes parts of lubrication system and ways of oil distribution. The next part deals with design of independent lubrication system for Formula student car´s turbocharger, in particular design of gerotor pump and it´s pressure regulator.
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Engine Cycle Design for Plug-in Hybrid
Koutník, Štěpán ; Kudláček, Petr (referee) ; Novotný, Pavel (advisor)
The content of this thesis is analysis of energy flows of the propulsion system in plug-in hybrid utility vehicle. Theoretical part of the thesis deals with electrically assisted turbochargers, which can positively influence engine characteristics. The following part analyses given diesel engine and utility vehicle in simulations in GT-Suite software, with simulations being performed on WLTC driving cycle. The results of the simulations demonstrate the relation between the usage of electrical and fuel energies and the driving cycle and show the engine operation points. By using optimal battery capacity, it is possible to save according to driving cycle more than 50 % energy consumed by the engine, directly influencing the fuel consumption. The results are possible to use as a guidance for moving the engine operation points and for sizing of the battery pack of hybrid utility vehicle according to real life application.
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Analysis of the turbine housing design in terms of heat leakage
Diakov, Jakub ; Lošák, Petr (referee) ; Vlach, Radek (advisor)
This diploma thesis deals with the judgment of usability of the topology optimisation of the Ansys Workbench program combined with thermo-mechanical fatigue and the non-linear material model of a turbine housing. The first part of the thesis includes research which serves for the purpose of understanding and for theoretical support of the practical part. The research part of the thesis at first gives reasons for the choice of the main aim of the thesis. The main aim of the thesis is the decrease of heat leak from the exhaust fumes due to the reason of the sooner combustion products processing and lower emissions production. The second chapter of the research analyses the construction and function of a turbocharger from the perspective of the geometry of the components and also from the perspective of the production and use of the components. The following chapter deals with the analysis of the energetic and thermal balance of the turbocharger. This chapter mentions the fundamental simplifications of the calculation problem and these simplifications are applied in the practical example. Next, the chapter analyses the thermo-mechanical fatigue, classification of the areas of fatigue and it also analyses the approaches used for the life expectancy predictions. The chapter of the research part deals with the selected areas of calculation and their theoretical basis. The last chapter analyses the fluid mechanics and the selected methods of the topology optimisation which are available in the selected calculation program. After the research part of the thesis, there follows the practical part which discusses a multiphysical example of the turbine housing optimisation from the perspective of heat leak and of the turbine housing being exposed to the thermo-mechanical fatigue. The practical part which is composed of several steps is based on the CFD analysis and this analysis is used for the purpose of gaining thermal conditions in order to calculate the transient thermal analysis. Out of the outcomes of the coupled transient thermal analysis, there is used the spatial temperature field which as a result of the expansivity of the material causes non-homogenous stress on the turbine housing. The practical part has an individual chapter dedicated to the usability of the topological optimisation in different types of tasks. One of the parts of this chapter includes is a suggestion of the methodology for determination of voltage limitation for the selected type of topological optimisation. The penultimate chapter in the practical part is dedicated to the topological optimisation of the turbine housing on the basis of the preceding voltage analysis and determined limitation. The last chapter includes performed validation of the optimised shape of the housing after the geometry is adjusted. The validation is performed from the perspective of steady state temperature of the output combustion products, of speed of heating of the optimised geometry and from the perspective of the comparison of the life expectancy determined in the thermo-mechanical fatigue. At the end of thesis, there are included conclusions discussed and suggested, scope for improvement and possibilities for continuation of further research.
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Combined supercharging internal combustion engines
Melichar, Marek ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
This bachelor’s thesis contains a basic division of various types of combined supercharging and a description of their functions. For the most common types of supercharging technologies there are listed specific examples of usage in the automotive industry. This thesis also contains a short overview of the history of supercharging and an analysis of ideal cycles supercharged internal combustion engines. One of the most important chapters of this thesis is thermal efficiency of supercharged engines and their comparison with naturally aspirated internal combustion engines.
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Steam-air turbine using PBS Turbo turbocharger
Schrimpel, Michal ; Doc.Ing.Ladislav Vilimec, CSc. (referee) ; Kadrnožka, Jaroslav (advisor)
The purpose of this analysis is used PBS Turbo turbochargers like a steam-air turbine in the Flexible Energy System. The System is analogy of Brayton cycle with high efficiency, but heat is transferred to the cycle through a heat exchanger. Main parts of this work are the literature search, the thermodynamic model of the steam-air cycle, and solution for other possibilities. The goal is to find maximum available electrical output and efficiency. The thermodynamic model is used to: - check computation of the standard turbocharger - computation of the steam-air turbine contain one turbocharger - computation of the steam-air turbine contain two turbochargers. The steam-air turbine is different from the turbocharger. They are compared and than there is found some new design of the new steam-air turbine. The one-turbocharger steam-air turbine is used to test steam-air cycle. The double-turbocharger steam-air turbine is suitable for Flexible Energy System. This solution has a lot of advantages.
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