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Modal Properties of 6-cylinder Tractor Engine Powertrain
Poláček, Milan ; Píštěk, Václav (referee) ; Dundálek, Radim (advisor)
Tato diplomová práce uvádí dynamiku klikového mechanismu šestiválcového řadového motoru za účelem návrhu klikového hřídele v CAD programu Pro/Engineer. Následuje popis vibrací klikového mechanismu a analytický výpočet jeho torzních vibrací. Hlavní část diplomové práce se pak zabývá konverzí hřídele do konečno-prvkového modelu v programu ANSYS a jeho importem do prostředí Adams/Engine. V tom je provedena modální analýza klikového ústrojí pro získání vlastních frekvencí a tvarů. Na konec práce je porovnán výstup z analytického řešení a výsledky z multi-body systému.
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Power control of combustion engines
Slavík, Tomáš ; Beran, Martin (referee) ; Zháňal, Lubor (advisor)
The main subject of this dissertation is a comparison between different methods of controlling the output in compression and spark ignition engines in light of economic- ecological parameters, effects on engine functioning as well as vibrations. Main types of power control, their principle, advantages and disadvantages are presented in the text. There are several comparative simulations described and presented at the end of this work that were created by using a multi-body system. Calculation of parameters and simulations were selected to approximate resulting values to real values as much as possible.
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Modal Properties of 4-cylinder Tractor Engine Powertrain
Ehrenberger, Pavel ; Beran, Martin (referee) ; Dundálek, Radim (advisor)
This diploma thesis contains a summary of the general information about the torsion vibration of the crankshaft. The main task is to prepare a flexible model of the crankshaft in the FEM program ANSYS and the subsequent export into the MBS ADAMS / Engine. According to parameters the model of four-cylinder line tractor engine with flexible crankshaft is built. Crank mechanism is analyzed to determine the natural frequencies and natural modes. Finally the results are evaluated and compared with analytical calculations.
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Rubber damper of a six-cylinder in-line diesel engine
Matula, Petr ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
This diploma thesis is called „Rubber damper of a six-cylinder in-line diesel engine“. It consists of brief introduction to crankshaft torsion and dampers, basic analysis of crank vibrations including crank natural frequencies calculation and analytic verification of torsional vibration stress. It contains also a concept of rubber damper and verification of crankshaft with mounted damper.
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Silicone damper of a six-cylinder in-line diesel engine
Drozdek, Lukáš ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis "Silicone damper of a six-cylinder in-line diesel engine " is focused on the proposal of alternative using of silicone damper for the a six-cylinder in-line diesel engine, which is made for tractors and other industrial aplications. The aim of this thesis is to count the oscilation of crankshaft by the help of appropriate dynamic model, then to propose such a basic parameters of silicone damper, which absorbes torsion blip crankshaft to acceptable value. The next part of my thesis is proposal of the constructive implementation of fixation the silicone damper on the free part of crankshaft. The last part of my thesis is comparing and evaluating the oscilation of crankshaft without a dumper and with a new propsal of the silicone damper.
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Torsional Damper for In-line 5-cylinder Engine
Polášek, Michal ; Svída, David (referee) ; Dundálek, Radim (advisor)
In this diploma thesis is created a cranktrain model in the MBS system ADAMS Engine. The thesis defines basic parameters and proportions of the torsional damper for in-line 5-cylinder engine. This thesis also puts mind to calculation of torsional vibration. In the MBS system ADAMS Engine is demonstrated affect of torsional damper on the torsional vibration of the crankshaft.
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Powertrain design of a four-cylinder aircraft engine
Příborský, Vladimír ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis named Powertrain of an four-cylinder aircraft engine dealing with configuration of the powertrain of a flat four-cylinder engine with ordered basic parameters. The thesis is focused on configuration design of the crank machanism and sequence ignition, balancing of centrifugal and reciprocating forces and their moment, conceptual design of crankshaft and its stress calculation. The thesis describing calculation of torsional vibration as well.
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Powertrain design of a eight-cylinder aircraft engine
Ošmera, Petr ; Novotný, Pavel (referee) ; Píštěk, Václav (advisor)
Configuration of the powertrain of a flat-eight engine with ordered basic parameters is the theme of this thesis which name is Powertrain design of an eight-cylinder aircraft engine. This thesis occupies with configuration design of the crank mechanism and firing order, balancing of centrifugal and reciprocating forces and their moments, conceptual design of crankshaft and its stress calculation. This thesis also puts mind to calculation of torsional vibrations.
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