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Vozidla s hybridním pohonem
Vančatová, Šárka
The Bachelor thesis deals with hybrid engines applied at cars. First of all there is a historical overview of these engines and then there is a description of their principles and types. In this chapter are also in sum pros and cons of hybrid vehicles. It shows technical properties of a few chosen road vehicles which have similar power and are available in the Czech Republic. Last but not least chapter describe analysis of the chosen technical parameters. Necessary data were downloaded from web pages of Czech car sellers.
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Hodnocení paliv pro spalovací motory ve vztahu k životnímu prostředí
Vančatová, Šárka
The name of this diploma thesis is „Evaluation of combustion engine fuel and its influence on the environment”. At the beginning there is a brief history of fuels. After that there is a chapter which divides fuels according to their state thus they are separate to three main types (solid state, gaseous state and liquid state). There are described main characteristics in the next part of this thesis which are heat of combustion, bulk density, dosage, volatility, resistance to detonation burning and mainly octane and cetane number. There are described currently used fuels for combustion engines right after the characteristic of fuels. These fuels are divided to fuels made of petroleum (gasoline, diesel, and LPG), fuels made of natural gas (CNG, and LNG), biofuels (bioethanol, biomethanol, vegetable oils – FAME and synthetic diesel fuel) and there is also an independent group of hydrogen. Thereafter are described European emission standards. The practical part of the thesis is focused on an analysis of previously mentioned fuels and there is a biggest focus on production of carbon dioxide. Other emissions are evaluated as well such as carbon monoxide, hydrocarbons and NOx gases. The analysis is done on classical fuels like gasoline and diesel and also on alternative fuels such as CNG, LPG, E85, FAME and hydrogen. In the end there are tables and graphs which contains production of flue gases.
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Konstrukce pohonu všech kol osobních automobilů
Vančatová, Šárka
Diploma thesis deals with design of all-wheel drive used in cars. First of all it describes calculation of driving boundaries such as highest elevation and maximal acceleration. Equations of motion, air effects, radial reactions, and peripheral forces are used in calculations of the boundaries. The next part describes components of all wheels, transfer case, and transmission gearbox. The last part of the theory deals with four wheel drive. This subchapter is divided to three smaller parts: permanent drive, self-connectable drive, and manually connectable drive. In the first subchapter of permanent drive is described fluid coupling and Torsen's differential. In the second subchapter of self-connectable drive is description of Viscomatic and Haldex transfer cases located between the axles. The last subchapter deals with electronically controlled lamellar clutch. The end of this chapter also briefly describes hybrid drive as a conception of four wheel drive. The practical part of this thesis deals with measurements done with Škoda Superb on the chassis dynamometer which belongs to Mendel's university in Brno. There are also measured data from calibration text, those data are used to determine a passive losses which are necessary for the testing of brakes. Those data are also processed and evaluated. The change of passive losses according to the load is also evaluated. The data from power test, and distribution of power on the front and rear axle are also evaluated. The measurements were done with three different loads. At the end of the thesis are compared measured data from the similar measurement done on Mitsubishi Lancer Evo.
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Vozidla s hybridním pohonem
Vančatová, Šárka
The Bachelor thesis deals with hybrid engines applied at cars. First of all there is a historical overview of these engines and then there is a description of their principles and types. In this chapter are also in sum pros and cons of hybrid vehicles. It shows technical properties of a few chosen road vehicles which have similar power and are available in the Czech Republic. Last but not least chapter describe analysis of the chosen technical parameters. Necessary data were downloaded from web pages of Czech car sellers.
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