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Analysis of deformation of control arm of turbocharger mechanism
Dvořák, Martin ; Vobejda, Radek (referee) ; Šebek, František (advisor)
This thesis is of a development character and foremostly focused on operation of a control arm inside of a turbocharger. The thesis is divided into two crucial parts. The first part is a theoretical introduction where general context, regarding function of turbochargers, is processed. The second one is the deformation analysis of control arm of turbocharger mechanism on which the whole thesis is based. The last part is final optimization. The results show that the deformation is similar when spots with low stress are removed. This fact is a key factor to achieve mass reduction for any part when the deformation stays the same.
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Analysis of turbocharger waste gate
Ondrejka, Adam ; Pohorelský,, Luděk (referee) ; Hadaš, Zdeněk (advisor)
The aim of master’s thesis was to put forward calculation methodology of wastegate turbocharger bypass channel discharge coefficient. Designed methodology was based on discharge coefficient analysis conducted utilizing CFD simulations of turbocharger turbine-side parametric model. It was achieved to propose a calculation, which differentiates relatively in average 1,4% from CFD data. New methodology improves the accuracy bypass channel design and helps to choose appropriate wastegate valve actuator.
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Turbocharger control systems
Fraňová, Zuzana ; Kaplan, Zdeněk (referee) ; Píštěk, Václav (advisor)
This thesis is of a search character with primary focus on turbocharger control systems. The work is divided into two main parts. The first part is focused on turbocharging fundamentals and the second part deals with turbocharger control systems (wastegate, VNT, VGT) and actuation of these systems.
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Diesel Engine Turbochargers
Fňukal, Jan ; Prokop, Aleš (referee) ; Janoušek, Michal (advisor)
This bachelor's thesis is specialized search dealing with diesel engine turbochargers. The work is divided into four main parts. The first part deals with positives of supercharging, history of turbochargers and principle of supercharging. The second part describes particular construction solution. The third part is focused on systems of regulation. The last part attends to development trends of turbochargers.
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Turbocharged 1,2L Spark Ignition Engine
Věříš, Michal ; Svída, David (referee) ; Bradávka, Marek (advisor)
This diploma thesis is focused on performance options for turbocharged 1.2 litre spark ignition engine. First of all, couple of engine variants are compared and the most suitable one is chosen. Production turbocharger is determined upon the calculation of compressor parameters. Simulation in Lotus Engine Simulation and GT-Power is done to confirm co-operation of turbocharger with engine. Two stage serial turbochargers are also compared and the most effective pair is chosen for simulation. Research through the possibilities for increase the power output and the detail focus on turbochargers is also part of this thesis.
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Turbocharging of combustion engines
Kadleček, Jiří ; Beran, Martin (referee) ; Vančura, Jan (advisor)
This bachelor thesis presents the construction and function of the main types of mechanic turbocharging systems. Furthermore, it contains the analysis of regulating elements and the last chapter involves also the description of the newest trends in the field of turbocharging.
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CFD simulation of exhaust gases flow through the wastegate of petrol engines turbocharger
Trška, Andrej ; Čížek, Petr (referee) ; Vančura, Jan (advisor)
Tato diplomová práce se zabývá turbodmychadly a CFD simulací turbodmychadla s integrovaným přepouštěcím ventilem pro benzínový motor. Cílem je poskytnout všeobecný přehled o přeplnování a konstrukci turbodmychadel. Práce popisuje proces tvorby 3-rozměrného virtuálního modelu sestavy turbínové skříně, extrakci negativního objemu plynů, tvorbu meshe a nastavení počítačové CFD simulace, která je v závěru práce vyhodnocena. Výsledky simulace slouží pro návrh odlišného provedení turbínové skříně za účelem zlepšení rozložení teplot výfukových plynů na výstupu a zkrácení aktivační doby výfukového katalyzátoru.
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Classification of wear relevant duty cycles of turbocharger validation
Kovaříková, Lucie ; Žatko, Miroslav (referee) ; Lošák, Petr (advisor)
Tato bakalářská práce se zabývá shromážděním dat z testů pracovního cyklu motoru, jejich kontrolou a určením kritérií třídění. Dále pak návrhem a vyhodnocením metodiky charakterizace cyklů zatížení, zaměřených na očekávané výsledné opotřebení kinematických komponent turbodmychadla. Vyhodnocení a kontrola dat jsou provedeny pomocí dvou nástrojů - Python a Matlab. Výstupem této práce jsou dvě navržené metodiky zpracování pracovních cyklů na základě zpracovaných dat - obecné zpracování dat pracovního cyklu a analýza pracovního cyklu, včetně polohy aktuátoru.
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SI engine with Miller cycle turbocharger operation optimization
Novotný, Pavel ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
The diploma thesis deals with the calculation of thermodynamic parameters of a turbocharged petrol engine with Miller cycle. A drive unit from Volkswagen, the EA211EVO model line, was chosen as the engine. The engine has a displacement of 1498 cm3 and engine power reaches 110kW at 5000 to 6000 RPM. In this work, a basic description of the thermodynamics of cycles of spark ignition engines is performed, then the problem of turbocharging and methods of its control are presented. The following are the created engine models in GTSuite environment in variants with WasteGate and Variable Turbine Geometry. Finally, operation optimizations with various valve timing changes are presented. The individual variants are the compared.
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