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Variable compression ratio for spark-ignition four-cylinder engine
Rada, Jan ; Fridrichová, Kateřina (referee) ; Drápal, Lubomír (advisor)
The automotive industry faces pressure to increase engine efficiency and reduce emissions. One promising solution is the implementation of variable compression ratio technology, which allows for the dynamic adjustment of the engine's compression ratio according to operating conditions, thereby improving efficiency, saving fuel, and reducing emissions. This thesis focuses on the analysis and design of a four-cylinder spark-ignition engine with variable compression ratio technology. The work compares the baseline engine with the modified engine in terms of installation space and weight, incorporating theoretical foundations of variable compression ratio and practical aspects of its implementation. The introductory part includes a literature review on variable compression ratio engines, followed by the conceptual design of the engine and an analysis of the crank mechanism. The main part of the thesis is the design, which aims to maximize the use of components from the original engine. The resulting kinematic and force analyses support the potential of this technology for developing more efficient engines.
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Utilization of Digital Twins in Automotive
Horuta, Šimon ; Fojtášek, Jan (referee) ; Repka, Martin (advisor)
This bachelor thesis deals with the utilization of digital twins in automotive industry. In the introduction, the concept of a digital twin is defined and then Industry 4.0 technologies used by digital twins are described. Furthermore, several examples of their application in the automotive industry are given. In the practical part, a simulation of a braking maneuver in virtual environment is performed and the functionality of this model is verified by real driving tests. As a result of the practical part, the graphs from the simulation and the real driving are compared.
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Utilization of Financial Analysis as a Tool for Investment Decisions
Homola, Jakub ; Bednář, Rostislav (referee) ; Ptáček, Roman (advisor)
The bachelor's thesis deals with the evaluation of the six largest companies in the automotive industry, in the period 2018-2023. This work is divided into three parts. In the first part, the key financial analysis tools for comparing companies are found. In the practical part, these tools are part of selected companies and comparisons between companies. In the design part, companies in the best financial situation are selected, from which a fictitious portfolio is subsequently compiled.
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Assessment of the use of 3D printing technology in the automotive industry
Ondriska, Josef ; Libich, Jiří (referee) ; Binar, Tomáš (advisor)
This thesis deals with 3D printing technology and analysis of various polymeric additive manufacturing materials, with a focus on their application in the automotive industry. In the experimental part, three types of material are tested for mechanical properties, both without degradation and after degradation by a climate chamber. In the tensile strength test, the possibility of using acoustic emission as a diagnostic method was verified. From the results obtained, a specific part used in the automotive industry was designed. The work also includes the design of a stationary
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Design of a slope generator for LIN bus transceiver with controlled slopes
Šlechta, Adam ; Háze, Jiří (referee) ; Kledrowetz, Vilém (advisor)
This thesis deals with the introduction of the basic types of communication protocols in the automotive industry. It then looks in detail at the LIN communication protocol, which is characterized by its high EMC requirements. The thesis thus contains a description of the principles of electromagnetic radiation. Then the thesis describes the design of LIN driver in the old I4Te technology and proposes its modification for the new technology. Furthermore, the thesis deals with the design of several blocks of the LIN driver. Namely, a DA converter and an input follower.
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Study of implementation of SPC statistical method for control of technological operations
Ondruška, Jan ; Zeman, Karel (referee) ; Jurová, Marie (advisor)
The master’s thesis contains a procedure of implementation of statistical process control for a machining process in a chosen company. The method is based upon knowledge of this topic which are mentioned in the first part of the thesis. The output is a comparison of general process performance before and after implementation of the above-mentioned statistical method and evaluation of the influence of this new method at the process. The comparison is done using hypothesis testing of specific statistical variables and analysis of process performance and capability of both data sets. The acquired knowledge and experience will be used for implementation of statistical process control for other processes in the company’s production portfolio.
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Mechanical properties of fiber reinforced composites for automotive applications
Bayer, Adam ; Žídek, Jan (referee) ; Jančář, Josef (advisor)
Bachelor’s thesis deals with studying mechanical features of fiber composites. As a matrix was chosen PMMA and as reinforcement was chosen glass fabric. Theoretical part sums up contemporary issues of polymer composites in automotive industry such as their production techniques and methods of impregnation. In experimental part were prepared samples by block polymerization of 30 % solution PMMA in monomer with initiator by 65° Celsius warmth oath, when was fabric directly unfolded in pre-polymer solution. On these samples were executed tensile tests by testing device Zwick and these samples were compared with results of theoreticaly calculated values.
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Optimization of the Armrest Manufacturing Process
Baláž, Branislav ; Juřica, Pavel (referee) ; Videcká, Zdeňka (advisor)
This bachelor thesis deals with the optimization of production processes taking place in the manufacturing company IAC Group Slovakia. The work includes a presentation of the company and an analysis of the current state of production processes taking place in the company. The theoretical part of the work describes the methods of lean manufacturing, basic concepts associated with the process management of the organization. In the analytical part, the manufacturing company is first introduced and a global analysis of processes is performed. Then a specific production process is analyzed, which will be optimized. The proposed part shows the proposed part of the process and there are evaluated the benefits of the proposed solution.
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