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Radial cylinder aircraft engines
Šimíček, Petr ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
The bachelor's thesis is focused on design of aircraft radial engines. Home is a treatise on the history of aircraft radial engines and their development in historical context. The second part is focused on the construction of radial engines of aircraft, then are some interesting construction solutions and compared with the engine of another type of construction.
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Fatigue life of crankshaft
Wolf, David ; Kučera, Pavel (referee) ; Vopařil, Jan (advisor)
This thesis is focused on the crankshaft as one of the most dynamically stressed component of internal combustion engines. At the beginning describes in the wider context how is the crankshaft of internal combustion engines strained. Then it considers individual parts of crankshaft, which are affecting its construction in terms of fatigue life. And in the last section describes the different ways to eliminate the damage caused by cyclic loading and modern methods of fatigue life prediction of crankshafts.
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Development engineering for crankshafts
Škrášek, Roman ; Drápal, Lubomír (referee) ; Vopařil, Jan (advisor)
This bachelor thesis deal with issue of developing crankshafts for combustion engines. It describes particular steps of design process and focuses on using of modern methods, which make this process markedly shorter and better quality. The thesis also focuses on fatigue life of crankshafts and on methods of influencing fatigue life.
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Reduction of Contact Pairs Friction Losses
Novotný, Marek ; Raffai, Peter (referee) ; Maršálek, Ondřej (advisor)
This bachelor thesis deals with the topic of mechanical efficiency of contact pairs in the crankshaft of the combustion engine. The introductory section focuses on the efficiency of the combustion engine as a whole. In addition, it describes the areas where mechanical losses primarily occur. The following chapters describe mechanism of friction losses, the main factors affecting their amount and the most modern ways to increase mechanical efficiency. In the closing chapter, some basic computing relations, describing the size of mechanical losses are listed. The aim of this thesis is to acquaint the reader with the importance of mechanical efficiency in the area of combustion engines.
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Radial cylinder aircraft engines
Šimíček, Petr ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
The bachelor's thesis is focused on design of aircraft radial engines. Home is a treatise on the history of aircraft radial engines and their development in historical context. The second part is focused on the construction of radial engines of aircraft, then are some interesting construction solutions and compared with the engine of another type of construction.
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Piston for Racing Engine Škoda 110
Gerák, Jakub ; Maršálek, Ondřej (referee) ; Svída, David (advisor)
This Bachelor's thesis deals with the defect of the piston Metalex for a racing engine Škoda 110. The aim of my work is to find the reasons for the piston defect, to check the most stressed parts by strength calculation and suggest a possible structural design so that the piston withstands all stresses throughout the required lifespan.
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Single cylinder engines enduro category
Svoboda, Tomáš ; Beran, Martin (referee) ; Vančura, Jan (advisor)
Bachelor thesis deals with the description of typical enduro motorcycle engine and describes its main parts. Next volume concern about chosen types of enduro motorcycles and its en-gines. Achievement of every single engine is shown in dynamometric diagrams. Maintenance schedule which is affected by given achievements is shown in tables. The engines of enduro motorcycles have been partly compared with motocross motorcycle engines
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Design of single-cylinder diesel engine
Němec, Jan ; Ramík, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis deals with the construction of the whole combustion engine, the crankshaft design, the piston and the piston rod. It also outlines the central lubrication, the cooling, the injection pump, the movable pump and the gear pump as well as fuel filtering, injection, engine timimg, etc. The four-cycle engine has four working cycles. During the first cycle the "clean" air is drawn and the piston moves from the bottom centre to the top centre and it comes to compression in the cylinder thanks to the adjusting of the advance and the fuel is injected into the cylinder. As the piston moves rapidly to the top centre, the pressure and the temperature increase so much that the fuel ignites. The pressure is about 26 atm (2.634Mpa) and the temperature is about 600°C. The fuel burns ideally in spherical wave fronts. The fuel is injected under high pressure as aerosol generates. As the fuel expands, the volume increases and the piston moves to the bottom centre. And it is its only working cycle.The piston moves from the bottom centre to the top centre and the exhaust valve opens through which the hot gases of combustion leave - and everything repeats. The design of the particular components is shown in the animations. Modelling and simulations were produced using CAD system. Everything is supported with calculations.
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