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Using of detonation nanodiamond in tribology research field
Mauer, Milan ; Křupka, Ivan (referee) ; Svoboda, Petr (advisor)
The main objective of this bachelor thesis is to give a general knowledge about nanodiamonds, which are chipped off during the explosions diamonds. These particles are used as additions in lubricating preparations to decrease the friction. Bachelor thesis summarizes the basic characteristics, methods of manufacture and application nanodiamonds in practice. Part of this thesis is dedicated to theoretical and detailed descriptions of procedures and experimental results in nanodiamonds field of study. Another part describes different types of nanoparticles, used for the same purpose as nanodiamonds. The final part sums up the advantages of nanoparticles and its purpose for experimental or practical usage.
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In the Forrest
Pucharová Kramářová, Vendula ; Dub, Petr (referee) ; Lahoda, Tomáš (advisor)
My work began with taking photos in the forest at night; this work was very important to me because of the mysterious feeling. My paintings are stylized more than realistic. I'm captivated by untidy nature, with fallen trees and decaying stumps. Oil is my medium- some places are detailed while others are expressive.
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Numerical model of ultrasonic oil level sensor
Chutný, Pavel ; Bílek, Michal (referee) ; Vyroubal, Petr (advisor)
This master’s thesis verifies physical principle of ultrasound in fluids by numerical model. At first, ultrasound study is ment. In second theoretic part, diferent kind of motor oils are described. Next, equations for numerical simulation are presented. In practical part, numerical model of level sensor is examined in well-knowed fluids (water, air). Results of laboratory measurement on topic of ultrasound velocity in oil dependent on temperature are aplicated on numerical model of sensor and optimalized.
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Crankcase Ventilation of the Internal Combustion Engine
Zavadil, Martin ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This thesis has been written out as a literature review. This work is focused on crankcase ventilation systems of internal combustion engines. The aim was to describe the origin of bow-by in different parts of engine, the principle of operation of individual components and a description of design solution for different types of engines. The work also describes the differences between crankcase ventilation systems of motorcycles and trucks. The last chapter is a description of used design solution of crankcase ventilation system for the selected engine VW 2.0TDI. In conclusion the work outlines possible developments in the field. The work also includes image attachments approaching the issue and design solutions.
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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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Potential use of waste lipid substrates and glycerol to production of carotenoids by yeasts
Kostovová, Iveta ; Obruča, Stanislav (referee) ; Márová, Ivana (advisor)
The aim of this study was use of lipid waste substrates and waste glycerol as carbon sources for red yeasts. Six yeast strains, namely Rhodotorula glutinis, Rhodotorula rubra, Rhodotorula aurantiaca, Cystofilobasidium capitatum, Sporobolomyces roseus and Sporobolomyces shibatanus were used for cultivation. All studied yeast strains were able to utilize glycerol and rapeseed oil as a carbon source. Cultivation in oil medium was in most of strains accompanied by decreased production of carotenoids. Increased production of ergosterol, lycopene and biomass was observed in some strains only. Most of yeast strains cultivated in glycerol medium produced increased amount of biomass as well as carotenoids. The best producer of bi-omass and pigments was yeast strain Sporobolomyces roseus CCY 19-6-4 grown in medium containing glucose and glycerol in a 1:1 ratio.
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Experimental Stand for Determination of Turbocharger Lubricant Consumption
Kuhajdik, Matej ; Doman, Jozef (referee) ; Novotný, Pavel (advisor)
This work solves the problem of lubricant consumption in the turbocharger and air blow–by from the compressor part of the turbocharger into the bearing housing. The chosen problem is solved by the design of the test mechanism that will be used in the technical experiment. The experiment provides analysis options for the GT35 turbocharger rotor seal. Part of the work is a complete drawing documentation of the test equipment, installation procedure and instructions for operating the equipment.
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The Study of More Effectiveness Selected Technology of Maintenance
Mecera, Tomáš ; Mangl, Vladimír (referee) ; Jurová, Marie (advisor)
This diploma thesis deals with a proposal how to improve technology of mainte-nance of trucks and buses of ICOM transport branch in Humpolec. Main aim of this diploma thesis is the analysis of current technology of maintenance, especially the oil system and it´s modification. This aim was reached by suggestion of the new technol-ogy of oil system, technical eguipment and elaboration of new technical methods. Modern and efficient technology of oil system for trucking and repairation is the solution of this topic. That is the set of processes with operating system (monitoring) whitch guarantees safe, enviroment storage of oils, greases and antifreezer, their de-cantation and precise dosing during distribuion.
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Nanolubricants for practical applications
Sochor, Ondřej ; Frýza, Josef (referee) ; Svoboda, Petr (advisor)
This bachelor thesis is concerned with describing nanolubricants and enhancing their characteristics using suitable additives, such as nanoparticles. These can improve their tribological properties and reduce mechanical wear and friction between two surfaces. This thesis summarizes manufacturing, some features and mechanisms that apply to nanoparticles and nanolubricants. The main outcome of the work is a synthesis of acquired knowledge in the field of nanolubricants for the purpose of practical application and description of current trends in its research as being used as additives.
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