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Dynamometer for measuring power of IC-engines
Mikulášek, Tomáš ; Klimeš, Lubomír (referee) ; Štětina, Josef (advisor)
The aim of the work was to summarize the development of a system for measuring the power of internal combustion engines, from the initial simple dynamometers, to modern electronic devices with flange strain gauge for sensing torque compared their advantages and disadvantages, usability, efficiency, performance and manageability. Furthermore there was performed comparison with the standards dealing with this issue. Use of these devices is available, subject to atmospheric conditions specified in standard and manufacturer.
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Mechanical losses of modern powertrains
Vaňkátová, Kateřina ; Czakó, Alexander (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with the issue of mechanical losses in internal combustion engines of passenger cars. The following chapters describe the origin of mechanical losses, the area of their occurrence in the engine and in the accessories driven by the engine. Furthermore, the work summarizes the current knowledge in the field of reducing mechanical losses and methods of determining the engine losses during their development. The aim of this work is to acquaint the reader not only with the issue of mechanical losses, but also with their significant negative impact.
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Thermodynamics of ideal cycles of IC engines in Matlab
Pavlíček, David ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
Key aspect of this thesis is toolbox, which contains functions for calculate ideal combustion engine cycles. Thesis is divided into four parts. In the first part is briefly described history. The first chapter contains description of real combustion engine types. In the second part, which is covered by the second chapter, is located thermodynamic view. Third part is whole about MATLAB. From historical introduction through description of individual functions to example how toolbox can be used. In the last part is comparison of real combustion engine cycle with ideal one, which has been created by toolbox.
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Environmental and Health Benefits of Electromobility
Sanetrník, Michal ; Bendl, Jiří (advisor) ; Hůnová, Iva (referee)
This bachelor thesis focuses on the health and environmental benefits of electromobility. The main objective of this thesis is to describe the current health and environmental risks of emissions from combustion engine vehicles and to determine whether electric vehicles eliminate these risks. The secondary objective is to evaluate the effectiveness of current emission regulations in automotive transportation. The first part of this thesis describes the current state of air pollution, sources of pollution, exposure and health impacts on the population. The second part is dedicated to electric vehicles and vehicles with combustion engines, and compares their health and environmental impacts. The output of this thesis is that combustion engine vehicles contribute to more than four million premature deaths worldwide each year, accelerate global climate change, damage the ozone layer, contribute to acidification, eutrophication, and negatively affect vegetation and pollinators. For these reasons, it is necessary to switch to a health and environmentally friendly alternative. Battery electric vehicles appear to be a suitable replacement in all areas covered by this thesis, especially if their implementation is accompanied by a transition to renewable sources. Keywords air polution, emissions, premature...
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Mechanical losses of modern powertrains
Vaňkátová, Kateřina ; Czakó, Alexander (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with the issue of mechanical losses in internal combustion engines of passenger cars. The following chapters describe the origin of mechanical losses, the area of their occurrence in the engine and in the accessories driven by the engine. Furthermore, the work summarizes the current knowledge in the field of reducing mechanical losses and methods of determining the engine losses during their development. The aim of this work is to acquaint the reader not only with the issue of mechanical losses, but also with their significant negative impact.
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Remote diagnostics of the combustion engine in real time
Jobánek, Vojtěch ; Beran, Martin (referee) ; Svída, David (advisor)
There is a current trend of constantly increasing emphasis on the cost-effective operation of vehicles in freight and passenger transportation. One of the efforts is to reduce the unproductive time of the driver and the vehicle which is spent on maintenance and repairs. The unproductive time can be significantly minimized by well-timed and faultless diagnostics that is, ideally, without need for a service visit. Real-time remote diagnostics, including an application that evaluates the current state of the vehicle, is a modern tool for efficient use of the vehicle.
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Measurement of internal combustion engine performance on a chassis dynamometer
Farka, Jan ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
Since the beginning of the automotive industry, a lot of years have passed and the characteristics of vehicles and all its components, especially the engine, are being given greater and greater emphasis both in terms of safety, performance and ecology. The performance of the internal combustion engine, along with a number of other vehicle features, is measured on chassis dynamometers. The aim of the thesis is to describe and analyse the dynamometers produced, the tests performed on them and also to measure the performance of the internal combustion engine on the chassis dynamometer. In conclusion, the assessment of the impact of tests on the automotive industry is just mentioned.
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