Theses (Department of Mechanical Engineering)

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https://hdl.handle.net/2437/360721

Theses collection of the Faculty of Engineering.

Böngészés

Megjelenítve 1 - 20 (Összesen 51)

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Integration of Hydrogen Fuel Cell Vehicles into Infrastructure
Kurmantas, Adil; Menyhárt, József; DE--Műszaki Kar
Incorporating hydrogen fuel cell vehicles (HFCVs) into the transportation infrastructure has the potential to bring about a revolutionary transformation in the global mobility landscape. This analysis delves into the state of HFCV infrastructure, market dynamics and growth prospects uncovering how HFCVs could be game changers in the international transportation industry. One of the attractions of HFCVs is their ability to tackle environmental challenges posed by traditional fossil fuel powered vehicles. By utilizing efficient energy through hydrogen fuel cells HFCVs not only address climate concerns but also pave the way for sustainable development in the transportation sector. While there is optimism surrounding HFCVs it is important to maintain a balanced perspective. A thorough Failure Modes and Effects Analysis (FMEA) reveals that currently risks associated with integrating HFCVs are minimal. These risks encompass aspects such as infrastructure and economics emphasizing the need for a cautious approach to ensure a smooth transition. To overcome these challenges and minimize setbacks, effective collaboration between governments and industry stakeholders is crucial. Continuous support and cooperation from entities play a pivotal role in successfully integrating HFCVs into everyday transportation systems. The next decade to fifteen years will be pivotal in shaping the future of HFCVs in transportation. Ongoing efforts to improve infrastructure, technological advancements and market expansion hold potential, for bringing about substantial changes worldwide. With the unwavering commitments of both governments and companies these joint efforts hold the potential to bring forth advantages leading us towards a future, in transportation that is more environmentally friendly and sustainable.
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Vertical Axis Hybrid Wind Turbine
Hameed, Adeel; Kostyák, Attila; DE--Műszaki Kar
My thesis' main purpose is to look into the potential and practicality of vertical axis hybrid wind turbines (VAHWTs) for sustainable electricity generation and investigate the self-starting issue of VAWT. The development of sustainable energy sources has become increasingly critical in recent years because of growing worries about climate change, finite fossil fuel supplies, and the need for energy sustainability. Wind power stands out as a prominent and realistic alternative among the vast range of renewable energy options and the urgent problems of climate change, energy security, and sustainable development have been identified as ones that require a significant response from renewable energy. This prompted me to focus my thesis on vertical-axis hybrid wind turbines and how the self-starting issue can be tackled to make it more efficient. My research’s main purpose is to investigate the potential and practicality of vertical axis hybrid wind turbines (VAHWTs) for sustainable electricity generation. To begin, I intend to present a detailed overview of wind turbines' original design and development process. Secondly, I would analyze the possible turbine types, VAWT will be compared with HAWT, and the possible conclusions will be written, and the efficiency based on the location and production output will be analyzed. The main steps include investigating the starting process of the wind turbine, solving the starting process problem, analyzing possible turbine types and comparing them with the horizontal axis wind turbine, and analyzing the efficiency of the vertical axis hybrid wind turbine based on location and production output. It is also evident from this study that in an era marked by rising energy demand and an urgent need for long-term solutions, the collaboration of artificial intelligence (AI) and the energy sector shines as a beacon of hope. The investigation of AI's integration in smart grids, energy forecasting, storage systems, predictive maintenance, cybersecurity, and optimized distribution highlights its critical role in reshaping our energy supply system. In conclusion, my investigation sought to pinpoint turbines well-suited for facility-level installation, emphasizing efficiency within specific wind conditions and compatibility with low-altitude sites near facilities. While refinements are possible with additional factors, the current approach is a resource-efficient solution for initial calculations.
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DESIGN OF A DARRIEUS TYPE WIND TURBINE
Patel, Aksh Hemantkumar; Szodrai, Ferenc; DE--Műszaki Kar
To summarise this thesis paper, I will briefly elaborate each of my major check points, and the results I obtained in and amongst all the research and simulations, as well as my own cognitive reasoning and understanding in the topic. Firstly, I introduce and explain what category of wind turbines the Darrieus type wind turbine is part of and which specific type of Darrieus Type Wind turbine. The Darrieus type wind turbine is categorised as a Vertical Axis Wind Turbine (VAWTs), this is due to the way it is set up unlike the usual wind turbines, they rotate around the vertical axis. More, specifically, I focused on the Helical shape of the Darrieus type wind turbine, as to eliminate inconsistency due to the curvature of the wind profile around the circumference of the wind turbine. This allows for a smoother output of torque and rpm that can be fed into the step-up gearbox, and finally, to the generator. Secondly, I ran simulations on the wing profiles I would think would be most suitable for the implementation into a Darrieus type wind turbine, and then perform the wind simulation using Ansys Discovery, to understand its behaviour in similar wind condition to as it would have, if it were to be implemented in the capital of Hungary, Budapest. The wind speed I found and used was 3.67m/s. The wing profiles I chose to perform my simulations on were the NACA 63(3)-618 and the NACA 0018, and compare the two against each other with each determining factor that would affect how it would behave if it were to be implemented on a Darrieus type wind turbine. I then performed multiple repeated simulations to make sure the results are consistent, and output the following data; Velocity, Total pressure and Static pressure. All the results pointed to the NACA 63(3)-618 being the more preferable wing profile between the two, due to its significantly higher value of Coefficient of Lift, and a negligible amount of slightly higher value of drag compared to the NACA 0018, which in fact maybe more useful as it may aid in rotations of the wind turbine as the wind passes by the wing profile. Finally, I compare my results to the literature already published and verify my results. My results show that the NACA 63(3)-618 is the more preferable wing profile, as there are many research papers published that note that they tested other NACA 6-series wing profiles and they performed really well to be used in a wind turbine and commercially is the shape mostly used for VAWTs and not the NACA 0018. Furthermore, my NACA 0018 performance data compares very similarly to the research paper from University or Stuttgart and University of Warsaw and this shows that there is a good level of accuracy between my work and other already published works, which shows that the simulations I have performed on the NACA 63(3)-618 are accurate and reliable. I also chose a well-fitting step-up gearbox and generator to go with the wind turbine design, thus making it theoretically plausible with the NACA 63(3)-618
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Optimizing manufacturing processes through industry 4.0
Mansy, Ahmed Kamel Mansy Kamel; Domokos, István; DE--Műszaki Kar
This study, which is being carried out in partnership with Kahramaa, aims to investigate and apply Industry 4.0 technologies to improve productivity and efficiency in the business's operations. The research addresses machinery-related issues and suggests creative solutions with a focus on using automation to improve Kahramaa's operational efficiency. Furthermore, the research attempts to create a complete technomatix model customised to Kahramaa's unique requirements. The study begins with an overview of the significance of automation for Kahramaa's operations, emphasising the possible advantages for improved operational effectiveness, resource optimisation, and overall process improvement. The research highlights the importance of implementing modern technologies to introduce a major shift in Kahramaa's manufacturing processes. The research then goes into pointing out and describing the difficulties created by the machinery used in Kahramaa's activities. This requires a careful examination of all current problems like the machine breakdown without sending out an alert. The study highlights the limitations that limit peak performance and give the possibility of inefficiencies and downtime. The research then concentrates on creating practical solutions to deal with the issues found with Kahramaa's machinery. To improve the efficiency and dependability of the machinery, this phase includes developing and putting into practise plans for predictive maintenance, real-time monitoring, and other data-driven techniques. Providing effective and efficient solutions that support Kahramaa's operational goals is the aim. Lastly, the research aims to create a technomatix model, this involves combining the manufacturing process into an organised and thorough framework that includes all of the technology components necessary for an automated process used, outlining each worker's and supervisor's responsibilities and workstations and machinery roles designed for Kahramaa's operations.
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Application of AI in Autonomous Vehicles
Naat, Yacine; Menyhárt , József; DE--Műszaki Kar
This thesis is about the innovation of the various Application of AI in Autonomous Vehicles with a focus on the lane detection technology. Investigating the crucial task of precisely identifying and tracking lane boundaries, which is essential to facilitate secure and efficient self-driving navigation. This study comprises a thorough examination of existing literature related to algorithms used in detecting lanes with particular emphasis on computer vision and machine learning methods. The research, via experimental analyses evaluates the state-of-the-art algorithms' performance under diverse real-lifelike scenarios in virtual or simulated eviroment. Through the use of simulations, the thesis aims to evaluate how lane detection python algorithms utilising machine learning libraries respond to different conditions and road layouts and how modern machine learning models and AI trends can be harvested in the automotive industry. The research involves the use of a simulated environments mimicking real-world conditions, allowing for controlled experimentation and analysis. The challenges of real-world deployment occlusions, dynamic road conditions and diverse lane markings types are emphasised. The thesis also investigates how dependable can lane detection algorithms be, by monitoring the accuracy and error margin values with each training and observing the simulated car behaviour. Acknowledging a crucial need for robustness and versatility within autonomous navigation systems is given special attention in this thesis. Additionally, the thesis discussed the advantages and limitations of using simulated environments for testing and validating lane detection algorithms compared to real-world testing. Consideration of ethical and safety implications in the transition from simulation to real-world deployment were taken into consideration. In conclusion, the thesis end result showed a high-accuracy prediction of the lane detection developed for this project within the simulated environment, offering valuable information for researchers and developers working on autonomous vehicle systems. The findings contribute to the understanding of how well these algorithms perform in controlled, virtual settings, aiding in the refinement and optimization of lane detection systems for future real-world applications.
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Designing a 3D printer
Egbi, Daniel Bofa-Okim; Nemes, Dániel; DE--Műszaki Kar
This thesis investigates the theoretical development of a 3D printer with exceptional accuracy, with a specific emphasis on virtual modelling, simulation, and optimisation methods. The suggested printer is designed to overcome the inherent difficulties of traditional 3D printing, with the goal of achieving unsurpassed precision in the creation of complex three-dimensional objects.The research commences by conducting a thorough examination of current 3D printing technologies, with the aim of identifying their constraints and potential areas for enhancement. Using sophisticated modelling tools, the thesis introduces an innovative conceptual design to improve accuracy and address typical printing problems.In addition, the conceptual design is situated within the wider scope of additive manufacturing, investigating potential uses in several sectors like medicine, aerospace, aviation, and mass customisation. The theoretical framework outlined in this thesis provides a roadmap for future academics and engineers aiming to transform these principles into physical technology.Ultimately, this research introduces an innovative and original blueprint for a 3D printer that achieves exceptional accuracy, thereby paving the way for progress in the field of additive manufacturing. The provided theoretical framework provides a clear plan for practical applications, hence creating new opportunities for precise engineering in three-dimensional printing.
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Noise measurements and examination of noise sources in passenger cars
Gawbah, Awadh Mohammed Awadh; Kocsis, Dénes László; DE--Műszaki Kar
This thesis aims to get and measure the noise emitted by the passenger vehicle according to ISO 5128-1980, ISO 5130:2019, and the Soundcam device. The thesis starts with the theoretical background about the sound, human hearing, and the effect of noise on human health. After that, it addresses the different sources to the overall noise of the vehicle that experienced by the occupants, such as engine noise, tire noise, intake and exhaust noise, gearbox noise, and aerodynamics noise. And finally, ISO 5128-1980, ISO 5130:2019 methods, and SVAN 971 Sound level meters and Soundcam 2.0 devices, which are used in the measurements, are explained in details. The vehicle used in this test is MK7 Golf Volkswagen. The practical part of the thesis involves the measurement results at the different microphone positions, and at each vehicle operating conditions, which are the steady speeds, the full throttle acceleration, and the stationary mode inside and outside the vehicle. Then, the L_(AF max) average values are evaluated and compared at each condition, which serves to identify the noise sources and the difference in the results. The highest average value of L_(AF max) at the steady speeds is when the speed of the vehicle reaches 120 km/h, while the lowest value at 60 km/h speed. For the full throttle acceleration condition, the noise level in the driver seat is higher than the noise in the passenger seat. The L_(AF max) average value at stationary mode outside the vehicle is higher than the noise inside, and the driver seat has the lowest value at this measurement. The last part of the results is the Souncam average results, which are high at the front side, and low at the rear of the vehicle. The reasons for the results difference are explained in details in the discussion section. Finally, some solution ways for reducing the noise of the vehicle were introduced, such as using damping materials, the engine insulation, and improve some parts of the vehicle. In summary, this thesis offers significant complexities of vehicle noise, and offering valuable perspectives and solutions to minimize the noise impact on the environment around us.
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Design and Analysis of a Solar Powered Car, Optimising for Sustainable Mobility
Essil, Desmond Armoh Annan; Menyhárt, József; DE--Műszaki Kar
The escalating global demand for green energy solutions has moved solar-powered vehicles into the spotlight as a promising avenue for reducing carbon emissions and mitigating environmental impact. This thesis investigates sustainable transportation, with a primary focus on the design and analysis of a solar-powered car. The study delves into the complex interrelation of automotive design principles, solar technology integration, and spatial optimization on the car body. The research journey encompasses four primary tasks. Drawing inspiration from leading solar-powered models such as Stella Terra and Lightyear One, the first task of this study builds an innovative design that seamlessly incorporate solar panels into the car's form without compromising aesthetics, aerodynamics, or functionality. To validate the design's efficiency, Solidworks Flow Simulation was employed for CFD analysis to evaluate the efficiency and viability of the car body. Aerodynamic factors are all examined to strike a balance between reduced drag and enhanced solar exposure. The CFD analysis not only validated the design but also informed iterative improvements. The third task delved into the integration of solar panels without compromising aerodynamics. Through meticulous consideration of panel placement and orientation, arrays are feased to strike a harmonious balance between solar energy harvesting and aerodynamic efficiency. The final task leveraged Simulink to model and simulate the solar energy collection and conversion process. The simulation showcased how energy harvested from the solar panels on the car's roof was efficiently converted and stored in the battery packs of the car. Though not modelled in detail, the prototype exibited very low drag and reduced pressure clouds around many vantage points during the simulation, which speaks to an Optimized Solar Car Prototype. The Simulink simulations also revealed how increased panel area on the body of the car proportionally affects the energy generated. Beyond the technical aspects, this thesis also raises awareness and interest in sustainable transportation solutions. The integration of solar power into everyday vehicles could inspire discussions on cleaner energy sources and influence public perceptions of eco-friendly mobility. Environmentally clean, socially equitable, affordable, economically viable, efficient and safe mobility is only possible through cooperation among the govemment as well as businesses and individuals.
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Development and optimization of a prosthetic hand: design, control and functional evaluation
Abdelaal, Serag Abdelnasser Sayed; Almusawi, Husam Abdulkareem; DE--Műszaki Kar
The complexities of mechanical design in the development of a prosthetic hand are thoroughly examined in this thesis. The index finger is used as a standard to emphasize the standardization of finger design. Thorough Finite Element Analysis (FEA) is carried out to guarantee the prosthetic hand's robustness to varying loads. After that, the finger is subjected to a thorough kinematic analysis that treats it as a dual 4-bar mechanism and offers a complete understanding into its dynamic behaviour, velocity, and location over time. The assembly procedure is analysed in detail together with material selection criteria that prioritize PLA to highlight the strength and practicality of the mechanical design. The investigation additionally extends its scope to include sensors and a control system, with servomotors and electromyographic (EMG) signals being the main type of integration. The functionality of the prosthetic hand is improved by the ensuing integration. Thorough validation using SimScape Multibody produces outcomes that confirm the system's correct operation and careful attention to its mechanical components.
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Design and Implementation of a Dual-Axis Mechanism for Precise Rotational Control
Al Yamani, Mohammad Jihad; Nemes, Dániel; DE--Műszaki Kar
In the realm of mechanical engineering, this thesis delves into the design, implementation, and optimization of a dual-axis mechanism controlled by an Arduino-based system. The primary objective is to seamlessly integrate theory and application, addressing the nuanced challenges of motor selection, gear system design, and control algorithm optimization. The literature review establishes a foundation by comprehensively surveying existing research on dual-axis mechanisms, and identifying gaps, controversies, and areas requiring further exploration. The design phase navigates through the complicated process of gathering requirements, specifying constraints, and leveraging 3D printing for fabricating gears, ensuring the mechanism aligns with size, mass, cost, and operational demands. Subsequently, the focus shifts to motor selection, where torque requirements are calculated, and a systematic approach guides the selection of a motor capable of optimal efficiency and reliability. This selection anchors the creation of a control system, employing the Arduino Uno circuit board, to orchestrate motor movements seamlessly. Experimental validation becomes a must in the fourth task, necessitating a rigorous setup to assess the mechanism's performance under varied loads and motion patterns. Data from these experiments enables a comprehensive evaluation of accuracy, repeatability, and speed, providing insights for potential improvements. Throughout this thesis, the simplicity and clarity of the code governing the control system underscore the fundamental principles of mechanical engineering. The successful assembly and testing of the circuit validate the theoretical foundations, affirming the practical viability of the designed dual-axis mechanism. This thesis goes beyond simple mechanical assembly, unfolding as an exploration through the combination of theory, design, and experimentation. It incorporates the core principles of mechanical engineering as they are applied to the dynamic domain of dual-axis mechanisms.
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NDE and diagnostics of an industrial printer
Zaman, Berkay; Balogh, Gábor; DE--Műszaki Kar
Even though I started my research for my thesis in November 2022, my experience with industrial printers goes much further than that. I have been working on a maintenance team of an industrial printer since June 2022. I am aware of the typical failures and the maintenance procedure of industrial printers. When I was looking for a supervisor for my thesis, Mr Balogh Gabor helped me to utilize my knowledge and experience to the fullest by helping me specify my thesis topic on Heidelberg Speedmaster SM 74. I would like to thank him for helping me on my journey and keeping me excited for my thesis. As I started my research for my thesis, I feel more comfortable working on industrial printers, and I feel much more savant. Although I am very excited to write about diagnostics of industrial printers, I will try to express my words as plainly as possible. I hope this thesis will be able to give readers wisdom about industrial printers, diagnostics equipment, and their utilization. My aim is to determine the condition of the bearings which are providing the smooth rotational movement for the ink rollers. I will also explain printing technologies and SPM method. By the end of this project, we will know the condition of the bearings and the further action about these bearings.
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Design and Additive Manufacturing of a Flat Form Tool
Rahman, Shahbaz; Bodzás, Sándor; DE--Műszaki Kar
The focus of this in-depth study is largely on the application of additive manufacturing in the creation of a flat form tool; an integral component utilized in several engineering applications. The study progresses with a holistic approach where each stage lends itself to the more broad-scope objective of reimagining the process of tool production through advancements in 3D printing technologies. Initially, the study embarks upon an in-depth analysis of the flat form tool, from both a constructional and analytical perspective. Essentially, this aspect lays the basis for the forthcoming design stages and the actual production methodologies. Furthermore, this study encircles the creation of CAD models for both the tool and the workpiece. The entire layout procedure enlists sophisticated modelling patterns tailored specifically to enhance precision and maximum functionality to develop models. Thus, paving the path for an efficient production process attuned to accuracy. Following the design phase is the actual operationalization of additive manufacturing of the tool. The Ultimaker 3, 3D printer is pressed into service, using PLA (Polylactic Acid) material, for manufacturing the tool. The Ultimaker Cura Slicer Software has been utilized to transform intricate digital blueprints into precise physical entities, with efficient material usage. Lastly, a finite element analysis (FEA) is performed on the produced tool to gauge its performance amidst operational situations. The results of this evaluation offer vital understanding of the tool’s mechanical idiosyncrasies, thereby aiding the ratification of design selections and corroborating functionalities along with resilience. Overall, this thesis proves conclusively that additive manufacturing holds viability and obvious benefits when it comes to producing tools tailored for unique requirements. Ultimate power of 3D printing in transforming tool production shouldn’t be neglected as it offers flexibility, waste minimization and heightened productivity. The study marks a potential ground breaker in its domain, revealing an all-encompassing mechanism to tool formation and manufacturing. By doing so, this study opens doors to future developments and potential advancements in additive manufacturing application in an extensive spectrum of industries.
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An Output Power-levelling in Wind Energy Conversion System
Demberel, Odmaa; Nemes, Dániel; DE--Műszaki Kar
This research focuses on the critical challenge of output power-levelling in Wind Energy Conversion Systems (WECS), specifically addressing the application of Doubly-fed Induction Generators (DFIG). In the context of the global transition toward renewable energy, the optimization of wind energy systems is paramount to ensuring efficiency and reliability. The significance of this research lies in its direct impact on the operational stability and performance of DFIG-based wind turbines, a technology extensively utilized in modern wind farms. Power fluctuations, particularly in varying wind conditions, pose a significant obstacle to the seamless integration of wind energy into the power grid. The primary objective of this research is to provide a comprehensive understanding of the control system of DFIG wind turbines, with a specific focus on its capabilities during fault conditions, namely voltage dips. The investigation employs a dual approach, combining theoretical modelling and simulation models to analyse and understand the normal operation of DFIG systems. The simulation model, with an emphasis on the wind turbine model, serves as a powerful tool for comprehending the intricacies of the system under steady-state conditions. Theoretical models establish a foundational understanding of the DFIG system's behaviour during normal operation, offering insights into the interplay of various components, such as power converters and control systems. Simulation models, on the other hand, provide a visual representation of the DFIG system's behaviour, particularly the wind turbine model, enabling a dynamic exploration of the system under normal operating conditions. The visualization of signals and behaviours during steady-state conditions serves as a crucial reference point for further analysis. This understanding becomes pivotal when examining the system's response during voltage sags and other operational circumstances. This research not only contributes to addressing the challenge of output power-levelling in DFIG-based wind turbines but also enhances our understanding of their behaviour under varying conditions. The combination of theoretical insights and simulation results provides a comprehensive framework for optimizing the control systems of DFIG wind turbines, ultimately contributing to the reliability and stability of wind energy systems in the broader context of renewable energy integration.
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Analysis and Testing of 3D models and infills
Gillani, Syed Musa Hassan; Balogh, Gábor; DE--Műszaki Kar
In the thesis work, you will be learning about the general effects of Infills. Measurements of each infill such as the general stress and strain have been calculated. Anycubic Kobra 3D printer and Anycubic 3D PLA filament are used for the tests. Furthermore, each infill in the software Ultimaker Cura has been used. Ever since the start additive manufacturing has faced many problems. Some of them include an overhang layer, materials not bonding together properly, and not enough knowledge of the infills and the effects, such problems affect the print quality and have increased defects. The main purpose of this thesis is to understand the effects of each infill where they can be distributed and used in different objects. This can help us reduce the amount of material we use and, in some cases, infills can also reduce the time taken for something to manufacture. The 3D printing technologies with defined infills and uses can expand easily, and such infills can further be integrated into multiple software and help in part optimization. To understand the effect properly, I designed 2 Tests with different properties. The properties included layer heights, wall layer counts, infill density, and top and bottom layer thicknesses. These properties were changed for the tests and the results were observed for differences. After reducing the layer counts and allowing the infill to have more space in the test sample the results were observed. A tensile testing machine with an integrated optical image camera to measure the accurate strength and strain of the materials was used. The final results were compared and the infill effect. The effect of walls was also observed in each test where reducing the wall count more space was available for the infills and a larger difference with results completely dependent on the infills was observed.
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Computational Fluid Dynamics Analysis of Tesla Cybertruck
Elzamar, Mostafa Ahmed Mostafa Mohamed; Szodrai, Ferenc; DE--Műszaki Kar
This thesis investigates the aerodynamics of the Tesla Cybertruck, with a focus on enhancing its overall efficiency. Objectives include a detailed analysis of airflow patterns and drag forces, employing advanced computational fluid dynamics (CFD) techniques. The study addresses existing gaps through a literature review, drawing insights from analogous geometries and drag reduction studies on pickup trucks. Methodologically, precision mesh generation techniques such as double precision, local sizing, and curvature meshing are applied. The simulation setup is rigorously validated through sensitivity studies and comparisons with Numeric Systems GmbH, establishing the reliability of the methodology. Tasks encompass the examination of separation bubbles, sharp edges, wake dynamics, and vortex shedding patterns, contributing to a comprehensive understanding of Cybertruck aerodynamics. The conclusion highlights key findings derived from the analysis. The identification of a separation bubble at the front of the hood and the impact of sharp edges on airflow dynamics provide valuable insights. The study reaffirms its credibility through comparisons with Numeric Systems GmbH, showcasing the robustness of the simulation methodology. The results contribute not only to academic knowledge but also hold practical implications for optimizing the Cybertruck's performance. The applicability of these findings extends to the broader discourse on electric vehicle design, offering insights for practical design strategies to enhance performance and efficiency.
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Health monitoring of Electric Vehicle
Satkali, Alibi; Menyhárt, József; DE--Műszaki Kar
This work investigates critical aspects of lithium-ion battery technology in electric vehicles (EVs), focusing on thermal management and novel charging solutions. Electric Vehicle market getting popular day by day; Countries as China, Germany, and USA. The parts difference, as AC/DC converter and engine, etc. Lithium-ion batteries offer high energy density but require precise temperature control for optimal performance and safety. The study explores various thermal management methods, including air cooling, liquid cooling, and phase change material systems. Simulation scenarios, such as nail penetration-induced damage, are analyzed, and an integrated cooling system is proposed for monitoring temperature profiles. The main problem now days is charging station numbers. To increase the number of car that charging in one moment, proposed charging method by Tesla’s coil and Tesla’s car bases. A SWOT analysis evaluates the coil charger, highlighting strengths, weaknesses, opportunities, and potential threats. Practical solutions and models from existing studies contribute valuable insights into the field. The findings underscore the importance of effective thermal management for lithium-ion batteries and propose a forward-looking charging solution to address the growing demands of the electric vehicle industry. Further research and development are recommended for the successful implementation of these advancements.
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INVESTIGATION OF THE EFFECTS OF THE SURFACE QUALITY ON THE MECHANICAL PROPERTIES OF ADHESION
Karakuş, Göksu; File, Máté; DE--Műszaki Kar
The reason I have choosen the topic ,,Investigation of the effects of the surface quality on the mechanical properties of adhesion” is because there are more and more different kind of adhesive technologies and in opinion it is important to give them more attention at mechanical engineering as well. In my thesis I am going to talk about how different type of surfaces effect on adhesives. I am going to test 3 different type of surfaces for aluminum with my supervisor. The process by which one material attaches to the surfaces of some other substance is known as adhesion. Its use is simple and economical. It gives surface impermeability. It has the advantage of being able to be applied to practically any surface or substance. It is capable of filling in the blanks. It is both insulating and dampening. Strength-to-weight ratios are proportionate to one another
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The Noise emission analysis of internal combustion engine and electric motor vehicles
Khurram, Muhammad Haseeb; Kocsis, Dénes László; DE--Műszaki Kar
The transition from internal combustion engine (ICE) vehicles to electric vehicles (EVs) is often brought up in relation to the advantages of emissions reduction for the environment. However, the acoustic environmental impact, particularly the noise emission characteristics of these vehicles, is a subject that needs comprehensive study. This thesis provides an in-depth analysis of noise emissions from both ICE vehicles and EVs, aiming to elucidate their noise profiles and the implications for urban noise pollution. The research methodology involved a series of controlled experiments using the SoundCam 2.0 device to capture and analyze the noise levels of a 2017 MK7 Volkswagen Golf representing ICE vehicles and a 2020 Volkswagen e-Up for EVs. Measurements were conducted across six different scenarios, including stationary baseline noise levels, full throttle acceleration, and pass-by noise at varying speeds, to simulate real-world driving conditions. Initial findings indicate that at lower speeds, EVs exhibit significantly lower noise levels compared to their ICE counterparts, primarily due to the absence of engine noise. This suggests that EVs could play a crucial role in reducing noise pollution in urban environments, where lower speeds are common, and noise pollution is a significant concern for public health and well-being. However, the research also uncovered that the noise level difference between ICE vehicles and EVs diminishes as vehicle speed increases. At higher speeds, non-propulsion-related noises such as tire-road interaction and aerodynamic effects become more pronounced, leading to a convergence of noise levels between the two vehicle types. This phenomenon highlights the complex nature of automotive noise sources and underscores the need for a diverse approach to noise reduction that goes beyond the powertrain. The thesis further explores the potential environmental health benefits of widespread EV adoption, considering the lower noise levels at typical city driving speeds. It also discusses the challenges and opportunities for noise reduction technologies, emphasizing the importance of addressing aerodynamic and tire-related noise, especially as the automotive industry continues to evolve towards electric mobility. In conclusion, this thesis provides valuable insights into the comparative noise emissions of ICE vehicles and EVs, offering a subtle understanding of their environmental impact. The findings advocate for the integration of noise reduction strategies in vehicle design and urban planning, reinforcing the role of EVs in creating quieter, healthier cities. Future research directions are proposed, focusing on the development of innovative noise control technologies and the establishment of new urban design principles that consider the acoustic environment as a critical component of urban liveability.
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Geometric design, modelling, finite element analysis of bevel gear with a spiral tooth direction
Rahat, MD Monuril Islam; Bodzás, Sándor; DE--Műszaki Kar
This study takes a close look at the geometric design, modeling, and physical analysis of a pair of bevel gears with spiral teeth. The focus is on a single project. It started with a close look at a spiral bevel gear taken from the differential box of a Polski Fiat. Using design software, perfectly designed the gear. Keeping the original parameters from the Polski Fiat gear was key. Paid a ton of attention to this, so the modeling process was accurate and trustworthy. This laid a solid groundwork for the physical analysis which was done afterwards. Crucial to the study was making four distinct gear designs, each with a unique helix angle (25°,30°,35°& 40°). This method made a deep side-by-side comparison possible, looking closely at how changes in the helix angle influence the gear's functionality under simulated scenarios. Ansys was used for static structural analysis, and each model faced a variety of trials with differing moment loads. The emphasis was on important measures like total deformation, directional deformation, equivalent stress, and normal stress. This study's results gave useful understanding about how each gear type behaves under various situations. It uncovered important information on how helix angles impact and how well the gear works. Especially looking at how stress is spread around the gear and how the gear changes shape. These findings were correct and could be used accurately by comparing them to theory and well-known gear standards
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Manufacturing Design and Geometric Analysis of Spline Shafts
Roy, Atosi; Bodzás, Sándor; DE--Műszaki Kar
This thesis investigates the geometric analysis of spline shafts by employing several different methods of analysis, including contact and non-contact methods. An extensive experiment was carried out by employing the contact method of surface analysis or surface roughness analysis by means of a surface roughness profilometer. The purpose of this experiment was to investigate a wide range of factors that are associated with behaviors, including fretting damage, manufacturing precision, and wearing potential. Based on the findings, it was discovered that a number of roughness factors had the ability to offer meaningful insights on possible phenomena. Three-dimensional scanning, which is a non contact method that makes use of modern technology, was also utilized in order to find deviations on the surface between the standard computer-aided design (CAD) model and the shafts that were manufactured using a high precision 3D scanner. I have also developed a manufacturing technique for spline shafts that has the potential to be the best possible one through calculation. This technology fits the criteria of the industrial sector and enables machining that is both fast and efficient.

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