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Measurement of Bearings Power Losses
Musil, Roman ; Raffai, Peter (referee) ; Drápal, Lubomír (advisor)
The intention of this bachelor's thesis is to handle an information about the measurement of losses in radial slide bearings and rolling bearings. In a first section, there is described friction in bearings. The next section is about the comparing machines with static and dynamic conditions. Third section describe methods and means of experimental measurement of losses in bearings under different operating conditions. In fourth section, there is introduced the numerical model for friction losses. In the last section, there is summary of machines and there is depicted possible future development too.
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Application of anti-friction bearings for four-stroke internal combustion engines
Knotek, Jiří ; Svída, David (referee) ; Drápal, Lubomír (advisor)
This thesis is concerned with the anti-friction bearings and their application in the construction of the four-stroke cycle internal combustion engine. Thesis consists of several parts. The first one is concerned with the anti-friction bearings themselves. This part provides basics of theory of the anti-friction bearings needed in the next parts. In the next part is described the use of the anti-friction bearings in the internal combustion engine. Last part is concerned with the use of the anti-friction bearings in the construction of the four-stroke cycle internal combustion engine. There is described mounting of crankshaft, connecting rod, camshaft, balancer shaft and turbocharger.
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Condition and Control Active Safety
Gašpar, Daniel ; Drápal, Lubomír (referee) ; Blaťák, Ondřej (advisor)
Bachelory work concerns conditional and control safety, shows thermal conditions of car crew, obligated specifications for heating and air-conditioning. Focuses on cooling units, defines exact part of air-condition´s systém, transfer of heat between a cabin of a car and souroundings, reduction of consumption and ways of reaching of this statement. Next it is encouraged with comfortability of siting, mainly locating people in bodywork, geometry inside space and creating virtual model and constructing seats.
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Engine modification for racing application
Fried, Tomáš ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This bachelor’s thesis deals with modifying a stock engine for racing application. The thesis briefly describes the regulations of the championship FIA CEZ Division 4 and rival powertrains. Next, it analyses the stock engine and two variants of modifications. The last chapter offers further possible modifications to the engine.
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Piston and Connecting Rod Assemblies of a SI Engine
Adam, Petr ; Janoušek, Michal (referee) ; Drápal, Lubomír (advisor)
This bachelor's thesis is focused on the design piston and connecting rod set, where was chosen for design the six-cylinder four-stroke spark-ignition engine. In design is going from existing engine, where are designed all parts of piston and connecting rod set on base of it. Subsequently is constructed mathematical model of kinematic and dynamics. Finally is going from dynamic for execution of strength control.
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Arrangement of Piston for BMW 2,5 TDS 4-stroke CI-engine
Rada, Lubomír ; Drápal, Lubomír (referee) ; Svída, David (advisor)
In this bechelor work presentation and design a four-stroke piston diesel engine with direct injection diesel by 130 kW, which is used in BMW vehicles. When choosing key dimensions come out of the original dimensions of the piston, used in diesel engine with indirect injection into the vortex chamber 105 kW of power. The draft of the main dimensions of the piston followed by strength calculation of the critical points of the piston.
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Piston of a spark-ignition engine produced by additive manufacturing
Valtrová, Martina ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
The first objective of this thesis was compiling research about currently produced pistons for internal combustion engines and about additive manufacturing and based on the acquired information deciding which type of piston makes the most of the advantages. Following this research, the next step was creating a design adjustment of a piston, which was previously designed with the conventional methods of manufacturing in mind, in a way that would make the best use of the different possibilities of additive manufacturing. There was also an optimisation carried out, which depicted the densities of material elements in the piston, showing where the material was less important. There were three variants of the additive manufactured piston created, ranging from a relatively conservative design, which could be theoretically produced by conventional methods with a more substantial subtraction of material added, to a design which could only be produced via additive manufacturing. A thermo-structural analysis at maximum engine load was carried out for all these piston models. Based on these data, a conclusion was made, whether the use of additive manufacturing was justified over the use of the conventional subtractive methods.
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