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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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Adjustment and modification made to the serially produced combustion engine to get an engine for racing purposes
Závodný, Tomáš ; Knotek, Jiří (referee) ; Maršálek, Ondřej (advisor)
This bachelor’s thesis analyses the modification of the serially produced combustion engine to get an engine for racing purposes. The first part is conceived as searching and is focused on why this serially produced engine was modified to racing engine and which adjustments were made on this naturally aspirated engine. Another part was dedicated to design simulation in the software ADAMS MD R3 and the results of these simulations were processed and evaluated. Conclusion contains a comparison of the results from the software and results from an actual engine dynamometer, and what is the overall success of the project in real life.
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Increase of Charging Efficiency of Two Stroke Engine
Mainuš, Jiří ; Maršálek, Ondřej (referee) ; Svída, David (advisor)
The diploma thesis introduces a design of a construction alteration whose aim is to increase the injection efficiency of the given two-stroke engine. The first chapter deals with a construction solution of the replacement of cylinder charge. The following chapters focus on the procedure of creating a 3D model of a cylinder unit through reverse engineering. Furthermore, the thesis contains a CFD simulation of the fluid flow including the evaluation of the results and experimental measurement on an aerodynamic track.
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Surface treatments of internal combustion engines cylinders
Malec, Petr ; Raffai, Peter (referee) ; Maršálek, Ondřej (advisor)
This bachelor thesis is a professional research, which describes the most common methods of surface treatments of modern internal combustion engines cylinders. The work consists of the distribution of the species changes, their use and justification of their application. It also describes the technology of individual surfaces, their coating and finishing operations to achieve the best results of sliding surface.
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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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Modern Trends in Vehicle Front Lights Design
Rada, Jakub ; Maršálek, Ondřej (referee) ; Raffai, Peter (advisor)
This bachelor’s thesis deals with the modern trends in the design of the headlamps. The first part presents the sequential stages of development of systems used for headlamps and their design solutions. The second part focuses on the possible cooling alternatives of functional parts in lighting modules, completed with the results of comparative laboratory tests performed by front manufacturers of automotive lighting. The final section contains a comparison of the currently most widely used technologies in the vehicle front lighting.
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Surface treatments of parts internal combustion engines
Toman, Josef ; Novotný, Pavel (referee) ; Maršálek, Ondřej (advisor)
This bachelor thesis is a professional research dedicated to the most frequently used surface treatments, applied to the stressed parts of internal combustion engines. The thesis also refers to surface treatments classification, benefits for the automotive industry and reasons for their development. Further it focuses on definitions of the technologies used, characteristics of processes and coatings, finishing operations after surface treatments and application of these treatments on the parts of internal combustion engines.
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Piston Rings of Modern Petrol Engines
Cupák, Václav ; Maršálek, Ondřej (referee) ; Raffai, Peter (advisor)
This bachelor thesis deals with issues of piston rings used in modern petrol engines. The first part is focused on describing of functions and requirements with which piston rings must deal with. Next part is aimed on shapes of piston rings. Materials from which are piston rings made of are part of third chapter. For proper function, it is important to make some surface treatment. The last chapter contains surface treatment of piston rings.
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Oils for combustion engines
Dzurenda, Ján ; Novotný, Pavel (referee) ; Maršálek, Ondřej (advisor)
Bachelor's thesis deals with information search of the current state of knowledge in the field of lubrication of combustion motors, i.e. lubrication systems and oils for combustion motors. The introduction of work focuses on the issue of lubrication systems, theirs partitions by methods of lubrication and description of the main parts of the lubrication system. Next part is focused on the oils of motors. In this part is referred to division of motor oils, requirements for motor oils and characteristics of motor oils. Follow part describes issues associated with the lubrication of combustion motors. Part cites main factors that affect the properties of motor oils i.e. fuel, water, glycol and dirt. Further is processed problem of motor working i.e. temperature, amount and consumption of oil. The last part describes the issues of biodegradability and actual requirements of application for motor oils.
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