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HCCI engines
Otáhalík, Pavel ; Šebela, Kamil (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with the problematics of HCCI engines. Due to later required knowledge of fundamental principles, the beginning of the thesis is devoted to the history of combustion engines, the principle of their function and their division by basic criteria. The following section consists of the description of petrol and diesel engines in terms of the principle of the mixture formation and its combustion with emphasis on their advantages and disadvantages. In the central part of the thesis, which focuses on the HCCI engines, various mixtures creation methods and ignition are described. Next, the HCCI engines are described in terms of emissions including current concepts solutions. Finally, the conclusion of the thesis consists of speculation of the future of combustion engines and their prospective alternatives.
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Gasoline Direct Injection
Smejkal, Jan ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor thesis deals with the problematics of gasoline direct injection in combustion engines. There is a view of the history of the development of gasoline direct injection in the introduction. The main part focuses on the principle of the process function, description of components of fuel system and specific components of exhaust system. There is also a description of benefits of using gasoline direct injection, especially considering the amount of pollutants in exhaust gas. The following part of the work contains an overview of gasoline direct injection engines and their comparison in terms of power. In the conclusion, there is a consideration of gasoline direct injection development in the future.
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Combustion Engines with Gasoline Direct Injection
Schulla, Radek ; Řehák, Kamil (referee) ; Dundálek, Radim (advisor)
This bachelor thesis deals with the problematics of direct gasoline injection in petrol engines. It presents basic overview of pollutants from exhaust gases, functions of individual components of fuel system and their development. Next chapter explains the principle of operation, advantages and disadvantages compared to port fuel injection. The last section is focused on use of direct injection in the future.
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Up-to-date Supercharged Petrol Engines
Gruber, Jakub ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is focused on the modern supercharged petrol engines. The intro-duction opens with a brief overview of the European emission standards. The main part of the work deals with the devices reducing car emissions. There are described fuel sys-tems and specific components of a direct fuel injection. A vast part of the work is dedi-cated to the downsizing of the engines and its contribution. I also mentioned the alter-native fuel vehicles.
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Capacitive Ignition System
Benček, Kristián ; Bazala, Jiří (referee) ; Beran, Martin (advisor)
Bachelor thesis deals with the complex issue of ignition system, with a special emphasis put on the capacitive ignition. Due to the later needs the knowledge of the principles, on the basis of which the individual internal combustion piston engines work is the beginning of a work dedicated to the just distribution of these engines according to the basic criteria and elementary define different types of piston internal combustion engines and storylines, which in them take place. Subsequently is described in detail dismantled the issue of the kindle system as a whole but also the individual components of the ignition system and attention is required even to properly set the most suitable moment of ignition (pre-ignition) and the need to ensure sufficient ignition energy. Ignition systems are divided according to the historical development from the earliest induction of the classical ignition until after the state of the art fully electronic ignition system. The greatest emphasis is put on detailed analysis of the capacitive ignition, which is then compared with the conventional ignition. The last part is devoted to the management of the combustion event using the initialization of the burning. As an example, that the management of the combustion event using the initialization of the burning is nowadays a real, is referred to the engine Skyactive X, which should be in 2019, the commonly commercially used in the model of the Mazda 3.
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Sériová a paralelní diagnostika přímého vstřikování paliva u vozidla Superb 1,8 TSI
HAJNÝ, Vladislav
Works on Serial and Parallel Diagnostics of Direct Fuel Injection for the Superb 1.8 TSI is concerned with the use of the Škoda Superb II. generation, based on VOŠ professional training, automotive and technical secondary school in České Budějovice. Because the car is fully functional, it is possible to demonstrate both the mode of operation and the control options on the individual components. The aim of this diploma thesis is therefore to make, document and describe diagnostics of the fuel system of the mentioned vehicle using the gauges and diagnostic tools available in the school education. I believe that I will acquire other valuable theoretical and practical knowledge, which I will apply in the technical practice.
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Diagnostika palivové soustavy s přímým vstřikováním
FAU, Petr
This bachelor thesis deals with the diagnostic issues of the fuel system with the direct injection at a petrol engine and also with the subsequent prognosis of the condition and disorders. In this work are described the main parts of this system: the engine control system, the fuel supply and the operation principle. The thesis then deals with the used diagnostic systems: the exhaust gas analysis and the On-board diagnostics. In conclusion the serial and the parallel diagnostics and the emission measurement with the diagnostics system Bosch FSA 740 are performed, assessing the results and then determining the future development of the diagnosed vehicle.
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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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