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Exploring the influence of pressure on the life of lead acid batteries for hybrid electric vehicles
Pospíchal, Martin ; Tošer, Pavel (referee) ; Bača, Petr (advisor)
The lead-acid batteries used in hybrid electronic vehicles HEV operate in high-rate mode in a state of partial charge PSoC. It occurs when the degradation mechanisms related to irreversible sulphation and negative electrodes are a limiting factor in the life of lead-acid batteries. The electrode system was applied to experimental pressure cells of different sizes. Exp. cells were subjected to measurement and evaluation of potential negative electrode, a negative active mass resistance, contact resistance of transition collector - the active mass with the evaluation and measurement of pressure fluctuations within four PSoC runs.
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Aerodynamic components of Formula 1 vehicles
Mazáč, Petr ; Beran, Martin (referee) ; Vančura, Jan (advisor)
This bachelor’s thesis deals with research themed aerodynamic components of Formula 1 vehicles. The beginning of the thesis is focused on basic of aerodynamic and generating downforce. Afterwards it deals with developement of aerodynamic from the beginning of Formula 1 to the present time, followed by categorization of the various aerodynamic elements which were used on vehicles throughout the history of the sport and in the present time with their construction description. It also summarizes active aerodynamic components.
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Friction and air feeders for paper sheets
Svoboda, Ondřej ; Košťál, David (referee) ; Brandejs, Jan (advisor)
The thesis is focused on summarizing the evidence on the issue of paper sheets feeding at the final processing of documents. The thesis includes dividing of paper feeders, their characterization, and description of friction and air feeders, which are most widespread. As a model for the description methods of sheets feeding were used machinery CFM 700 and GPM 540A of Cyklos company. The thesis also compares friction and air feeding from the constructional point of view. The conclusion focuses on the new methods in the paper feeding in future.
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Study of active mass volume changes of lead acid battery electrodes
Nevoral, Miroslav ; Vaněk, Jiří (referee) ; Křivík, Petr (advisor)
This bachelor´s thesis deals with detailed study of influence of thurst on attributes of positive and negative electrode masses of lead acid battery electrodes with main accent on explanation of measured characteristics. Three kinds of electrode systems were put together and measured. Measured characteristics of changes of thurst power were recalculated during charging and discharging to changes of total thickness of system.
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Possibilities of using different types of admixtures in shotcrete technology
Berčík, Martin ; Brožovský, Jiří (referee) ; Hubáček, Adam (advisor)
The Bachelor’s thesis is conceived in the form of research findings on current knowledge of inert and active ingredients and their effects on the shotcrete. It focuses mainly on the composition of individual ingredients, their function executing in the concrete mix and explains how they affect the selected physical and mechanical properties. The work enlightes the importance of using co-products from the industry production as an additive to concrete in terms of both ecological and partly economical.
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Historical Overwiev of F1 Chassis and Engines Evolution
Hrudík, Jan ; Svída, David (referee) ; Dundálek, Radim (advisor)
This thesis is focused on the overwiev of main periods in the area of race car construction development. In the first chapter, main attention is dedicated to Formula One cars, attending races since 1950. In spite of this, there is briefly noted the technological development before FIA Formula One Championship. Next chapter is dealing with technical restrictions and regulations restraining construction of Formula One car. Data are situated in the table, ascending sequenced according to the year. Next part refers to the actual Fia Formula One Championship season 2008. There is abstract of technical regulations and the list of actual Formula One teams, their cars and drivers. There is some pages acting with one of the Formula One team. In the last chapter some of technological experiments are presented.
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Ground effect in motorsport
Mlčoch, Pavel ; Hejtmánek, Petr (referee) ; Čavoj, Ondřej (advisor)
This bachelor thesis describes ground effect, its influence on car aerodynamics and its use in motorsport. The thesis describes the dependence of downforce created by ground effect on the design and set-up of the race car, as well as on the downforce generating parts' relative movement in relation to the track during a race. Advantages and disadvantages of the use of ground effect aerodynamics are discussed as well. Next, there is brief summary of the use of ground effect throughout the history of motorsport. At the end, attention is paid to modern race and sport cars using the ground effect aerodynamics.
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Experimental measurements of aerodynamic forces
Job, Štefan ; Vančura, Jan (referee) ; Porteš, Petr (advisor)
This thesis deals with the effect of the aerodynamic forces on a vehicle. It contains the description of the test run of the vehicle, the proposal on how to process the measurements, the processing of the measurements themselves, and the final assessment of the results as to their accuracy and the possibility of repeating the experiment. Furthermore, this thesis contains the comparison of the effect of the individual aerodynamic features on the race car.
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