National Repository of Grey Literature 22 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Miller cycle in nonstationary modes
Švanigová, Lenka ; Šebela, Kamil (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with the assessment of the influence of valve timing, regulation of the lambda coefficient, fuel delivery and ignition advance on the course of the engine torque and the response of the turbocharger during a transient acceleration event of a loaded engine. The model of the investigated VW 1.5 TSI EVO 110 kW gasoline engine with the Miller cycle was created in the GT-Suite program and was used to simulate the transient acceleration event of the loaded engine and evaluate the influence of the mentioned parameters. For the simulated transient, the influence of the turbocharger regulation method was compared, using the wastegate and the variable nozzle turbine.
Air flow measurement through compact heat exchanger in wind tunnel
Žůrek, Michael ; Vondruš, Jan (referee) ; Šebela, Kamil (advisor)
This thesis describes Formula Student competition, overview of used aerodynamic devices, placement of compact heat exchangers on these monoposts and current monopost Dragon e2. Next section examines commonly used compact exchangers and their aerodynamic drag, mainly caused by angling and ununiform flow. Subsequently is described the process of preparation, measurement in wind tunnel and measuring devices. An algorithm was created and described, which was used for evaluation of measurement, influence of some factor was commented. On the right-side compact exchanger, methods of measuring were compared, namely pneumatic probe, pressure difference and turbine anemometer. On left side exchanger were observed influence of various aerodynamic elements. Lastly alternative position behind vehicle rear axle was measured.
Electric Vehicle Acupack
Huk, Vojtěch ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
This bachelor thesis deals with electric vehicle batteries. The battery itself consists of many structural parts that can be made from a variety of materials and assembled in many ways. The first part of this thesis provides an overview of the characteristics a battery should have to achieve the requirements placed on it, and the methods available on the market to meet these requirements. The second part describes in detail the individual components of the battery, including their function and design. Special attention is given to battery cells, describing and comparing the technologies used in them, including graphical representation of this comparison.
Velomobile Pony 4 Towing Vehicle Design
Hrdina, Petr ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
This bachelor's thesis focuses on presenting alternative means of transportation for individuals and shipments in the context of growing awareness of the impact of transportation on the environment and deteriorating traffic conditions in large cities. The main objective of the thesis is to introduce available designs of cargo bikes and velomobiles, their accessories on the market, and propose a conceptual solution for manufacturing a hitching device for the Pony 4 cargo bike. This hitching device will enable easy and quick increase in the cargo bike's carrying capacity. The thesis also includes the design and production of a prototype trailer cart.
Electric Motor Test Bench
Kliš, Roman ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
Formula Student, moment measurement, linear guide, cantilever, simulation, flexible coupling
Parameters for 1D Single Cylinder Engine Simulation
Stryja, Štěpán ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
The relationship between the 1D simulation and the corresponding input parameters is addressed in the paper. The one-dimensional simulation is demonstrated in the GT-Power environment. The work deals with both experimental and computational analysis of the input parameters. Additive methods of 3D printing of fixtures and subsequent measurement of volumetric flow rates on a Superflow Flowbench SF-260E purge station were used. This procedure led to the final calculation of discharge coefficients. The 3D scanning method, using ATOS 2M equipment, together with subsequent data processing, using the appropriate software, led to the analysis of the valvetrain mechanism and the construction of its kinematics. The practical part was demonstrated on two-cylinder heads of a four-stroke single cylinder engine with a displacement of 125 cm3, with natural aspiration. One of the heads was modified, resulting in volumetric flow increase of 29 % in case of the intake and 15 % in case of the exhaust, compared to the stock head. The work led to the acquisition of key input data for the 1D simulation of the aforementioned engine.
Battery thermal unit design
Raclavský, Martin ; Ušiak, Michal (referee) ; Šebela, Kamil (advisor)
This bachelor's thesis brings knowledge about the testing of battery cells and provides a particular design of a tempering unit for monitoring the effect of temperature on their parameters. The work can be divided into two parts. The first research part is focused on the theoretical foundations that deal with testing the parameters of battery cells and the effect of temperature on their operation. The research provides a deeper understanding of the relationship between temperature and the performance, capacity, lifetime and safety of battery cells. In the second part, based on the knowledge gained, the design of a thermal conditioning unit is carried out, which serves to provide a temperature-stable simulated environment for monitoring the effect of temperature on the tested cells. The design includes a chamber, a thermal block for temperature regulation, a method of cooling and heating, and suitable wiring. Heat losses were calculated, the required heat output was determined, and possible modifications to the unit were discussed.
Engine Block with Integrated differential for Formula Student
Marek, Jiří ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
The diploma thesis deals with the design of the integration of limited slip differential of the formula student car into the engine block. To select suitable solution from several considered, a research analysis of possible concepts was first made and then the best possible solution was determined using a decision table. A 3D model was then made for the selected concept based on the original engine block, digitalized by using a laser 3D scanner. The resulting model was then evaluated and built into Dragon X.
Electronic supercharger for Formula Student
Matoušek, Patrik ; Šebela, Kamil (referee) ; Janoušek, Michal (advisor)
The main goal of this diploma thesis is to verify the application of the Electric compressor in the Formula Student monopost category. Diploma thesis is focused on the computational model and analysis of the combustion engine in the GT-POWER software. Outputs from this calculation are used for the design of the main parameters of battery pack. In the final part of the thesis, the monoposts with ordinary turbocharger and with the electric compressor are compared in the lap time simulation in the Autocross discipline.
Hydrogen as fuel for vehicles over 3.5 t
Alinče, Antonín ; Šebela, Kamil (referee) ; Štětina, Josef (advisor)
This bachelor thesis deals with hydrogen infrastructure for the needs of freight transport: methods of production, transportation, and storage of hydrogen. The work describes the path of hydrogen from production to vehicle propulsion, whether in the internal combustion engine or in the fuel cell. These hydrogen propulsion options are then compared with each other and with other fuels. The conclusion of the work is then focused on the conceptual design of the location of hydrogen tanks in the vehicle.

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