Práce a štúdie

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Author: search.filters.author.Čerňan, JozefStart date: 2021

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Now showing 1 - 10 of 25
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    Návrh technických úprav pre zvýšenie výkonu piestového motora hercules Teledyne 4A084
    (University of Žilina, 2024) Bernáth, Martin; Čerňan, Jozef
    This article concerns the investigation of the possibilities of increasing the power of the Hercules Teledyne 4A084 engine. The aim of this article is the proposal of technical modifications, that could be carried out on the engine in order to increase its power. In the introduction, the reader is informed about the piston engine in question. The article further takes a look on the effect of individual piston engine systems on performance. In the final part of the work, the ideal air flow through the carburetor for the Hercules engine is calculated, then modifications are proposed, which are expected to increase its performance. The modifications mainly concern the fuel system, the ignition system and the connection of the device for supercharging the engine.
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    Koncept vrtuľového propulzora pre široký rozsah rýchlosti letu
    (University of Žilina, 2024) Ivan, Jakub; Čerňan, Jozef
    This thesis is focused on creation of propeller concept for wide range of flight speed. The part, which is discussed in the thesis is creation of design for blade motion mechanization, that can reach variable diameters. Apart of creation of this design, the thesis offers historic overview of propeller development throughout the years. Mechanization is designed in 3D environment. The software used for design is Autodesk Inventor. Design isn´t calculated of given engine. The outcome of this thesis is to give perspective for constructers, whoever would want to construct this idea in reality, not 3D environment only. The design in 3D environment is working as it should and when motion is launched, blades are really changing the diameter. In the design study, radius difference between extended and reduced blades is more than 300 millimeters. Desing complies with the task.
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    Návrh hybridnej pohonnej jednotky pre experimentálny letún Straton D7
    (University of Žilina, 2024) Longauer, Oliver; Čerňan, Jozef
    The aim of this article is designing hybrid power unit for the needs of experimental aircraft Straton D7. Article describes different options of hybridization of power units on basis of their architecture and the function of electric component in relation to the whole power unit. Compares different designs of automotive and aircraft solutions of hybridization of power units. After that, article offers solution for hybrid engine of Straton D7 on basis of gained theoretical knowledge, comparison of shown conceptions and basic calculations, with the needs and predispostion of the original aircraft in its best interest.
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    Optimalizácia činnosti motora ROTAX 915is s alternatívnou riadiacou jednotkou
    (University of Žilina, 2024) Voderadský, Ján; Čerňan, Jozef
    The aim of this bachelor's thesis was to optimize the performance of the ROTAX 915 IS engine using an alternative electronic control unit. This work provides a detailed overview of the mechanisms and control systems used in other engines as well. The thesis focuses on a comprehensive understanding of both the basic and auxiliary systems of the engine and provides a proposal for optimizing the performance of the ROTAX 915 IS engine. The optimization of the engine was designed to improve efficiency, increase engine performance, and overall reliability in various modes. Following the design, a testing phase ensued where the unit was subjected to extensive practical tests on a real ROTAX 915 IS engine. These tests demonstrated significant improvements in the controllability and performance of the engine, confirming the effectiveness of the proposed settings. The results of this bachelor's thesis highlight the potential of alternative control units to enhance the performance and efficiency of engines. The findings can be used for further research that could expand the use of alternative control units in other aviation engines.
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    Ignition system and their purpose in aircraft reciprocating engines
    (University of Žilina, 2023) Vorlíček, Marek; Čerňan, Jozef
    This research describes the function and principles of ignition systems in aircraft reciprocating engines. Physical-chemical processes, which are part of combustion, and the factors affecting them are defined in detail. Types of ignition systems are divided based on main parts and frequency of appearance in aircraft engines. Components of ignition and their function in electric and magnetic circuits are individually described. The future development in ignition systems is defined. The research includes an analysis of the pros and cons of laser ignition in its application in aviation. It presents Low-Temperature Combustion or Volumetric Ignition using Low-Temperature Plasma. An example may be the Microwave-assisted Plasma Ignition System. Engine speed and vacuum in intake are the main parameters influencing the ignition timing curve in Electronic Control Unit Master developed by IMF Soft. This ECU is used in the designed ignition system of testing engine. The designed timing curves were tested, and the results of engine power and torque were compared. In conclusion, the optimal timing curve is evaluated for this reciprocating engine.
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    Design and implementation of engine test device for the M601 engine
    (University of Žilina, 2023) Pukač, Andrej; Čerňan, Jozef
    The aim of this article is to create a proposal and documents for the implementation phase of the engine test device for the Walter M601 engine, which after implementation will serve as a teaching and research aid for researching new alternative fuels, testing different variants of propellers and others. As part of our work, we are dedicated to the development of two entire future test segments of device, namely the test stand and the design of the monitoring and regulation part, where we use the original devices, manufactured in compliance with LUN, which was directly designed in the past for the M601 engine and its installation in the L-410 Turbolet aircraft. The design of the test stand will include a 3D design and documentation. The monitoring part will consist of the design of the monitoring panel, which will contain selected engine indicators and LUN sensors, which will be used from the defined solutions of specific requirements and the design of electrical wiring and power sources and modules for the operation of the monitoring and regulation part.
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    Proposal and realisation of a modification to Al-9 engine for installing a free gas turbine
    (University of Žilina, 2023) Supuka, Matej; Čerňan, Jozef
    This paper focuses on the creation of a prototype connection of the AI-9 engine with a free turbine for creation of an experimental turboshaft engine. We go through theoretical knowledge about the issue in which we work on the basis of which we created solutions. We worked with the teaching aids of the Department of Aviation at the airport in Žilina. We prepared these tools for work in the workshop and we made minor adjustments to the engine to make it possible to carry out our work. In our work, we used a procedure called high-fidelity prototyping. This means that we created a digital model on which we applied solutions. We decided to transfer our prototype to the digital environment due to low financial and time costs. We faced several design problems, including the need for a stator, the gap between the guide tunnel and the rotor, or how to connect to other components. We managed to find preliminary solutions for these problems and created a digital prototype of the resulting assembly. Subsequently, we presented the positives of our results and the method of their application in practice.
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    Design and implementation of an alternative Rotax 915is engine management system
    (University of Žilina, 2023) Psárska, Vanesa Viktória; Čerňan, Jozef
    The content of this article is design and implementation of an alternative Rotax 915is engine management system. In my research, I worked with a wide-spectrum control unit ECU MASTER designed for the optimization of the injection time of spark-ignition engines and also the control of the ignition advance taking into account several sensors of engine input parameters. The article was created as part of research into the issue of optimal control of piston engines. Current methods of controlling engines and their systems, in principle, allow very precise control of important systems of modern piston engines, especially with regard to the ignition and fuel system. The inclusion of microprocessor units with multiple options for input parameters allow the control unit to take into account even less important parameters, which, however, help the control unit to keep the engine running smoothly while maintaining high combustion efficiency. The elaborated design of a possible alternative engine control system is subsequently connected with the practical realization of this control system. The result of the research is the design of the control system of the Rotax 915is engine and the subsequent practical production and adjustment of the control unit under the name ECU MASTER, which verifies the universal applicability of such a unit for various combustion engines.
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    Design of the system for the optimal composition of the fuel-air mixture of the M60 engine
    (University of Žilina, 2023) Koša, Dávid; Čerňan, Jozef
    The aim of article is to design a system for maintaining the optimal composition of the fuel-air mixture in an internal combustion engine, to describe in more detail the principle of mixture preparation with the help of carburation, and in connection with this to explain the issue of exhaust gas temperature. In the first part, the work deals with the function, then the construction, individual types of carburetor, direct and indirect fuel injection. In the second part, attention is paid to the mixture as such, its composition and especially the appropriate ratio of air and fuel. Subsequently, he deals with the issue of the temperature of the cylinder heads and the temperature of the exhaust gases, where he explains how exhaust gases are formed, what they are composed of and what effect they have on the independent operation of the engine. The last part is dedicated to the description of the experimental engine M60, in which the given parameters, construction and partially described development procedure of this experimental type of engine are briefly characterized, but also contains a proposal of a technical solution that will allow control of the composition of the mixture based on the analysis of exhaust gases.
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    Fuels for carbon neutrality in aviation
    (University of Žilina, 2023) Valášek, Denis; Čerňan, Jozef
    Aviation is one of the fastest-growing industries, but its contribution to greenhouse gas emissions cannot be ignored. In recent years, the development of alterna-tive fuels for aviation has gained increasing attention to reduce carbon emissions and achieve carbon neutrality. This thesis provides an overview of the current situation in aviation, focusing on the use of conventional jet fuels and the need for alternatives. Various types of alternative fuels for aviation are presented, including biofuels, syn-thetic fuels, and hydrogen. The dvantages and disad-vantages of each type of fuel are analysed, as well as the current production methods and their potential for com-mercial use. With a greater focus on biobutanol as an alternative fuel.