|
|
Predicting spark-ignition engine emissions
Jirout, Petr ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with the possibility of predicting emissions of SI engines. The aim was to create an algorithm for predicting unburned hydrocarbons and carbon monoxide, based on ECU signals. The algorithm is based on practical experiments with SI engines. In the summary, the issues and the possible use of the created algorithm following the incorporation of EU7 are outlined.
|
|
|
Application of cooled Exhaust Gas Recirculation on modern gasoline engines
Bazala, Jiří ; Bauer, František (referee) ; Tůma, Jiří (referee) ; Píštěk, Václav (advisor)
This document describes the possibilities of increasing the efficiency of an internal combustion engine using cooled EGR (exhaust recirculation system), water injection and their combination. To investigate it the engine model was calibrated based on the experiment. It was investigated the effect of the externally cooled EGR system on key engine parameters such as efficiency, specific fuel consumption, performance and others on this model. Here it was concluded that EGR system has unsatisfactory parameters in terms of the ratio of achieved results and complexity. Therefore, the water injection model was tested on the model and compared with the EGR system. The engine model with water injection was evaluated as more advantageous. Therefore, it was decided to invest available sources to the experimental vehicle with water injection and verify experimental results with model. Using of both systems, the EGR system and water injection, and ideally with the possibility of pre-ignition, appears to be the most suitable combination with regard to the observed parameters.
|
|
|
Ignition engine emissions
Semela, Lukáš ; Píštěk, Václav (referee) ; Kaplan, Zdeněk (advisor)
This thesis deals with emissions of ignition engines. The introduction acquaints the reader with the history and lays out the reasons why it is a crucial topic to be dealt with. Furthermore, the term emission is being explained as well as the description of its chemical composition, the impact on the environment and human organism. The method of measuring is also mentioned in this thesis. Then the explanation continues with European Union’s current legislation. The whole thesis is concluded with information on the additional modification of emissions and chapter that outlines the future of automobiles regarding the environment.
|
|
|
An emission reduction systems for vehicles with gasoline engines
Filip, Josef ; Fridrichová, Kateřina (referee) ; Böhm, Michael (advisor)
This bachelor thesis deals with ways for emission reduction of passenger cars with an ignition engine. The introduction describes the principle of combustion, the methods of preparation of the ignition mixture and pollutants that arise during the combustion. In the main part of the work, the individual specific provisions for reducing emissions used in modern vehicles are analyzed in detail. Further the examples of current emission systems for several selected cars are presented. All the findings are summarized in the following chapter. In the next part, own configuration of the emission system is described in detail, which is designed with the regard to maximum efficiency in reducing emissions. The summary together with the evaluation of the current situation and the outline of the possible direction for further development in this area are in the last part of this work.
|
|
| |
|
|
Spark-ignition engine concept for hybrid passenger car
Břoušek, Roman ; Böhm, Michael (referee) ; Drápal, Lubomír (advisor)
Thesis aims on calculating method of engine conception for hybrid power train usage. Aim is to describe briefly overview of common combustion engines in hybrid power trains of the passenger cars. According this overview a proposal of naturally aspirated spark ignition combustion engine by specified parameters in 1-D CFD will be made, while the effort is to take into account less complexity and production costs at the same time higher efficiency in the most load modes.
|
|
|
Petrol Direct Injection
Moravec, Tomáš ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor thesis is about the system of direct injection petrol engines within cars. The first chapter is designated to the history of the direct injection petrol system and the development of different concepts. The thesis then concentrates on the mixing of air with fuel and describes the injection system in detail. Within the content of my work is a list of specific engines, using the direct injection system. The last chapter is devoted to the future development of direct injection petrol system and those with the compression-ignition system.
|
|
|
Gasoline Direct Injection
Donutil, Jan ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This bachelor’s thesis deals with direct injection applicated in spark ignition engine. It explains how the system works and what are the benefits in comparison with older methods. Components description and a list of current engines are mentioned in the next chapter. The last section is focussed on the future of these motors.
|
|
|
Powertrains of Octavia vehicles
Pavličík, Lukáš ; Vopařil, Jan (referee) ; Píštěk, Václav (advisor)
This Bachelor thesis describes powertrains of Škoda Octavia vehicles, which have used from the beginning of production of this car until today. It has two main parts. First chapter focuses on the power unit. Each one is briefly described. In second chapter are described all mechanical and automatic transmissions.
|
|
|
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.
|
guest ::
