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Hydrogen fuel for internal combustion engines
Polnický, Václav ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
Knowledge of all ower the world research, dealing with hydrogen combustion engines, were sumarized in this bachelor thesis. Ways of hydrogen production and its storing are mentioned too. This paper is focused especially to hydrogen-air mixture formation and its ignition solving. Some samples of hydrogen cars –booth of prototypes and serial products- were introduced too.
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Piston group of in-line three-cylinder diesel engine
Drdla, Marek ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
The aim of this thesis is to calculate a thermodynamic cycle of given engine with basic geometric, thermodynamic and operating parameters of is piston category. Then, a disign of cylindrical unit and strengrh check of piston, piston pin and conrod eye, follows. There is preliminary mentioned the principle of Diesel engine function. The body of the thesis is divided into five chapters and the attachment. At first two chapters, there are basic parameters of the engine and Sabat thermodynamic cycle described. Next chapters are focused on force load of piston, piston pin and static and dynamic stress of conrod eye. Numerical calculation of three-cylinder Diesel engine Zetor 5202 is given in the attachment. In conclusion, there is the procedure and the analysis of calculation described and zhe calculation is evaluated. Finally, a comparison of theoretical concept and real conditions is given.
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Internal combustion engines of Volkswagen group
Kalnaši, Radoslav ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
Radoslav Kalnaši Internal combustion engines of Volkswagen Group This bachelor thesis evaluates development of the Volkswagen combustion engines, the present state and the future perspective. It provides description of the historical evolution of the Volkswagen combustion engines. The thesis concentrates on the present Volkswagen drive unit and possibilities of the future Volkswagen engines development.
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Present state of combustion engine transfer to alternative powertrains
Maršálek, Ondřej ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The current state of change from conventional combustion engines to its alternatives is mapped in this bachelor’s diploma thesis. The basic principles and configurations of conventional combustion engines and its existing alternatives are mentioned. The thesis is also dealing with various kinds of alternative fuels; their summary and evaluation are mentioned as well. In the conclusion of the thesis it is foreshadowed in what way the car industry could proceed in the subsequent years.
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Reduction of cranktrain mechanical losses
Lhota, Martin ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The aim of the bachelor thesis Reduction of cranktrain mechanical losses is to describe the issue of lowering mechanical losses occuring in the crank mechanism of internal-combustion engine. Therefore it aims to create a list of mechanical losses main sources, to show suitable methods to determine them, and to describe some of earlier used concepts leading to reduction of friction losses. Further, it is focused on the description and comparison of existing trends by which the given problem can be solved to a certain extent. The thesis also tries to evaluate these trends by an analysis following the standpoint of effectiveness and progressiveness, and to formulate a conclusion.
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Slide bearing parameters of modern combustion engines
Dvořák, Martin ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The objective of this bachelor‘s thesis is to provide general information on sliding bearings and their advantages and disadvantages. The thesis is divided into five parts that deal with individual topics and issues. The first one is concerned with the bearings themselves, their partition and development. The second part compares sliding bearings and rolling contact bearings and their pros and cons. The next part then describes their main parameters, e.g. the friction loss or various lubrication methods. The fourth one summarizes several examples of practice, like lubricating in extreme working conditions and an overview of bearing failures. The last part deals with the construction of sliding bearings used in combustion engines, materials used to produce sliding bearings and with the issue of lubrication, which is essential for this type of bearings.
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Vehicle with ecological drive
Švec, Jan ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
This work is focused on design of three-wheeler with ecological drive. The first chapter discusses the history of three-wheelers from beginning of their development. The second chapter is a survey of present production and the third chapter is devoted to separate design of vehicle conception.
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Reduction of Valvetrain Mechanical Losses
Kučera, Pavel ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The topic of this thesis is the mechanical losses in the valvetrain. The purpose is to describe the creation of individual losses and their possible reduction. The main factor of creation of losses is friction. The result of this thesis is to highlight the possible methods to reduce friction and other influences acting on the valvetrain. The main benefit is description various types of surface and design modifications of valvetrains, which are already used or are in development.
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Powertrain of in-line five-cylinder diesel engine
Zarambukas, Michalis ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
The aim of this graduation theses is geometrical and thermodynamic calculation of determined five-cylinder diesel engine and calculation of operation parameters of cylindrical unit and then to compare them with real motor and strike the balance. Other step is to work out thermodynamic cycle and draw the result in p-V diagram. Then to calculate power, effecting on piston which includes proposal of basic proportion of piston and wrist pin, and it follows weigh of piston group and maximal quickening and inertial force of piston group, calculation of specific pressure and pressure in wrist pin. Other purpose is to determine basic proportion for piston rod and to focus on material qualities of con rod eye and bronze case, determination of maximal pressure due to inertial forces comming from gas pressure and security against possible slip and tiredness. At the beginning is described diesel engine from its foundation, its activity to its use in company. At the close are reviewed the results of the calculations.
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