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Powertrain of in-line three-cylinder diesel engine
Riemel, Pavel ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
Objective of bachelor’s thesis is for main predetermined geometric, thermodynamic and operation parameters cylindrical unit of line three-cylinder compression-ignition engine perform calculation of thermodynamic cycle, project basic dimensions of piston group and for noted operating modes perform strength check of con rod eye. Resulting values compare with comparable compression-ignition engine and verify its appropriate functionality. In preamble of work is mentioned compression-ignition engine, its basic usage, principle of function and description its main parts. The work is compound of two basic parts. The first contains description of calculation with related graphic and the second calculating supplement in which are calculations of thermodynamic cycle, forces reacting on piston group, strength calculation and control of con rod eye. At the close results of calculation are analysed.
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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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Ideal cycles of combustion engines
Kertész, Tibor ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
The main subject of this bachelor´s thesis is to summarize basic theoretical knowledge of ideal thermodynamic cycles and to develop their mathematical models in Matlab to calculate and draw diagrams of each cycle. Based on the calculated values, it was possible to compare the cycles with each other.
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Stirling cycle
Veselý, Milan ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This work was aimed to comparise of ideal traditional and alternative termodynamic cycles, calculations and determinativ of efficiency of these cycles, executions of p-V and T-S diagrams with a closer look at the Stirling cycle.
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Powertrain of in-line four-cylinder spark ignition engine
Parchański, Martin ; Rauscher, Jaroslav (referee) ; Píštěk, Václav (advisor)
Objective baccalaureate work is count for engaged four - cylindrical petrol motor geometric, thermodynamic and operation parameters and subsequently rated funds make up real motor and strike a balance. Perform calculation thermodynamic cycle simulation power cycle and draw p- c diagram, assesment basic size piston and piston pin, assesment inertial force applied on piston group, calculation specific pressure and tension at piston pin, assesment basic proportions connecting rod, calculation tension in connecting-rod eye in consequence heating - up bronze chuck, assesment maximum tension in connecting-rod eye in consequence inertial force and from pressures gas and determine safety against yield strength and endurance strenght. In introduction work is schematic working principle gas engine motor and schmatic most frequent principle raising achievement. At the close are capitalized computing result.
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Piston steam engine
Hrbáček, Jaroslav ; Novotný, Zdeněk (referee) ; Fiedler, Jan (advisor)
Object of this document is possibility of using piston steam engine (later only SE) in steam boiler plant, heating plant and steam reduction station. There is implemented a thermodynamic suggestion of SE for defined parameters of mechanical power 20 kW, frequency 1500 cpm, input steam pressure 1,5 MPa and warmth inside steam condenser 105 °C. There are implemented the main construction segments of SE with a view to steam distribution system. For determine a shape of work diagram SE (p-V diagram), there was created a supportive programme in Excel. The programme serves as the basis of determination of motor stroke volume and basis of determination of main dimensions.
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Thermodynamic cycle hot engine
Matuška, Petr ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
The aim of this work was to summarize basic theoretical knowledge of ideal thermodynamic cycles of heat machines and to develop their mathematical models to calculate and draw diagrams of each cycle. Based on the information found and calculations made, it was then possible to compare the individual cycles with each other.
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Aditional modification of Subaru test engine ignition advance
Gášek, Martin ; Mazůrek, Ivan (referee) ; Strecker, Zbyněk (advisor)
This bachelor’s thesis deals with design and application of an additional vari-able ignition advance for Subaru Robin EH34 engine connected with an experimental station TecQuipment TD301. At the beginning, a basic theory for the ignition advan-ce is given. Then a way how to measure an ignition point and engine characteristics is described. Manufacturing and assembly of the mechanism is covered. In the end a comparison of p-V and p- diagrams for various ignition settings is done. Influence of power output is discussed.
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Comparison of traditional and nontraditional cycles of heat engines
Dobiáš, Ladislav ; Jedelský, Jan (referee) ; Štětina, Josef (advisor)
The bachelor thesis describes the thermodynamic cycles of four-stroke spark ignition (SI) and compression ignition (CI) engine, Wankel engine and two-stroke spark ignition (SI) engine. Based on the information is compared with thermal efficiency of each engines with four-stroke spark ignition engine in the T-S diagrams. There were also dedicated to Atkinson cycle and its use in practice. The last part deals with the construction of a variable compression ratio used in the development of modern engines.
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Matematické aspekty Van der Waalsovy rovnice
HÁNA, Jiří
The thesis deals with cubic equations and their application in physics. The first part clarifies some basic terms, which are then used in the following chapter, which is focused on solving the cubic equations using analytical and numerical methods. The third part of the thesis presents the Van der Waals equation, shows the possibilities of calculating the critical values of the pressure, the thermodynamic temperature and the molar volume, as well as the creation of a p-v diagram using a computer. The last part of the thesis is focused on a teaching unit draft on the thesis topic using the concept of STEM. The last part also presents interesting curves on the thermodynamic surface and shows the advantages of the STEM approach.
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