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Four-cylinder gasoline engine with cylinder deactivation
Steigl, Vladimír ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
The aim of this diploma thesis is design of configuration and balancing of crankshaft which is determined for four-cylinder gasoline engine. The thesis investigates kinematics, dynamics and possible ways of balancing the inertial forces and moments of the rotating and sliding parts of the central crank mechanism. Subsequently, the 3D CAD model is designed according to the presented drawing. It is transformed into a spare torsion system, from which the calculations of its own and forced torsional vibrations are based. The proposed 3D CAD model is then spatially transmitted in the FEA software Ansys Workbench and modified (boundary conditions, etc.) in the FEA software Ansys Mechanical APDL so that it can be calculated according to the selected LSA method. From the selected results of the LSA method, the crankshaft safety factor against fatigue damage is calculated.
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Piston of 4-stroke SI-Engine with 75 kW Output Power
Kalugin, Ivan ; Svída, David (referee) ; Dundálek, Radim (advisor)
This bachelor's thesis deals with calculating suggestion and structural solution of a piston for a 4-stroke petrol engine with 75kW output power. The structural solution includes determination basic dimensions of engine and crank mechanism. Final part is devoted to fort control of critical piston sections on the base of kinematics crank mechanism and indicator diagram.
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A two stroke engine for paragliding
Šafařík, Petr ; Kaplan, Zdeněk (referee) ; Píštěk, Václav (advisor)
This diploma thesis deals with the design of a two-stroke engine for paragliding. First of all, the different types and designs of two-stroke engines are discussed. After the design of the crank mechanism, the forces in the engine are tested, followed by the strength control of selected components. In addition, the work includes design of individual engine components, propeller reducer and 3D models of components and motor unit.
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Piston for 43kW 4-stroke SI-engine
Vaculík, Tomáš ; Svída, David (referee) ; Dundálek, Radim (advisor)
This bachelor’s work describes a calculational project and design solution of a piston for 43 kW power output, four-stroke petrol engine and depicts basic sizes of this engine. The piston was constructed to be able to work in hard conditions that the piston faces in the combustion area. An important part of my thesis is the piston calculation of its resistancy by which we verify corectness of suggested sizes of the piston.
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Four-cylinder in-line gasoline aircraft engine
Kučera, Ondřej ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
The thesis deals with the structural design of a steel connecting rod for the aircraft engine Walter Mikron III, which is currently still manufactured and developed by company PARMA-TECHNIK, s.r.o. The proposed connecting rod would replace the current duralumin connecting rod. The work also contains a strength analysis of the designed component, in which it was aimed to verify the stress on the connecting rod, based on which the fatigue safety factor was performed. This is crucial for dynamically stressed parts of internal combustion engines. Furthermore, was investigated the effect of the change of the connecting rod on the torsional vibration of the crank mechanism. For this purpose, was built a discrete torsion model. The output of the whole work is the drawing documentation of the new connecting rod, meeting the requirements for application in an aircraft engine.
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Petrol five-cylinder radial aircraft engine
Donutil, Jan ; Kaplan, Zdeněk (referee) ; Píštěk, Václav (advisor)
This thesis deals with configuration of radial five-cylinder engine with attention to crank mechanism. Covered topics are motion of crank mechanism with articulated connecting rod, force analysis and balancing of inertial forces. The second part discusses FEM analysis and calculation of safety factor of selected component.
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2-stroke Engine for Small Motorcycle
Hlaváč, Štěpán ; Píštěk, Václav (referee) ; Rauscher, Jaroslav (advisor)
This diploma thesis contains an engineering design of a two-stroke engine for small motorcycle. In the first part, the background research of these motors was made. Main dimensions of the engine and a calculation of the forces acting in crank mechanism were determined. Further check stress analysis of connection rod and calculation using a finite element method were performed. This diploma thesis also includes virtual 3D models of all designed parts and a drawing of cross section of the motor.
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Piston for VW TDI 81kW Engine
Skoupý, Petr ; Dundálek, Radim (referee) ; Svída, David (advisor)
The bachelor‘s work deal with proposal piston for VW TDI 81 kW engine. Aim this work is determine principal dimensions of the engine, the crank mechanism and piston. At the beginning are describes a parts of the engine and then there the piston assembly. Further there is a work deal constructional design and material of piston. In a last way too strenght calculation of critical piston cross-sections.
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