Menyhárt József

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• MSc Mechanical Engineer, Associate Professor
• Professor (Associate) at University of Debrecen

Renewable energy sources and energy independence are becoming increasingly important worldwide, and reducing emissions and optimizing energy use are high on the EU’s agenda. In this context, electric and hybrid vehicles could not only be a means of transport but also an active part of the grid. This paper analyzes one year of empirical data of a hy...

The consequences of rear-end collision with a heavy vehicle could be significantly high risky, and the likelihood of the serious personal injury is notable high. The importance of an under-running guard is to increase the occupants survive and reduce the technical and personal injury. The lack of RUPD (Rear Underrun Protection Device) could involve...

From 2035 onward, the registration of new conventional internal combustion engine vehicles will be prohibited in the European Union. This shift is driven by steadily rising fuel prices and growing concerns over carbon dioxide emissions. Electric vehicles (EVs) are becoming increasingly popular across Europe, and many manufacturers now offer modifie...

This research aims to identify and evaluate the key challenges and obstacles hindering the adoption of sustainable energy in the aviation industry. The outcomes and insights derived from this research will be synthesized to provide a comprehensive overview of the opportunities and suggestions for the adoption of sustainable energy in the aviation i...

Advances in information and signal processing, driven by artificial intelligence techniques and recent breakthroughs in deep learning, have significantly impacted autonomous driving by enhancing safety and reducing the dependence on human intervention. Generally, prevailing ADASs (advanced driver assistance systems) incorporate costly components, m...

Climate chambers play an important role in the design and testing process. Several different chambers have been built over the years, specialising in different areas. It means there is a wide choice on the market and as a consequence, parameters necessary for us limit when choosing the ideal test chamber. Our instruments might be subjected to sever...

The optimization of manufacturing and production processes with various computer software is essential these days. Solutions on the market allow us to optimize and improve our manufacturing and production processes; one of the most popular software is called Tecnomatrix, which is described in this paper. Tool condition monitoring is a vital part of...

Photovoltaic energy is a well-known term nowadays, and with the continuous increase in PV demand, it has become necessary to consider the other sides that may affect the success of it, which is considered one of the real effects on the environment. The PV waste has started to create a large issue with the absence of administrative procedures in man...

Unmanned robots being remotely controlled or autonomous are spread worldwide and used in different purposes. Inhabited robots are brought very close to users and accessibility to these tools is very high, moreover, at very low costs. Regardless to emphasize the increasing popularity of these robots. However, any robot system being electrically driv...

Many companies are concerned about the problem of increasing average dwell time for their import containers at the port of the final destination and therefore incurring additional shipping costs in form of demurrage charges for the port administration and detention charges for the shipping line. Previous studies have addressed this topic by analyzi...

Nowadays, small and medium sized enterprises (SME) have a relatively large task and expectation caused by the appearing of populated large foreign-owned enterprises in our country. In order that they will be able to cooperate with them and be able to join and integrate into the value chain they supply they must meet the high quality of standards. O...

Artificial intelligence is becoming a powerful tool of modernity science, there is even a science consensus about how our society is turning to a data-driven society. Machine learning is a branch of Artificial intelligence that has the ability to learn from data and understand its behavers. Python programming language aiming the challenges of this...

An electric car is a vehicle powered by one or more electric engines, utilizing energy stored within batteries that are rechargeable. The first register of a usable electrical vehicle dates from 1880s. A hybrid vehicle incorporates two or more different power types, including, e.g., gasoline engines and electric motor. The goal in this work is to p...

Crucial factors with respect to modern autonomous vehicles include reliability and design. Researchers and engineers strive to increase the number of vehicles over the latest possibilities both in industrial and in military applications. A number of modern batteries are available on the market for the electric autonomous vehicles. The authors sugge...

The supplier selection issue has been found out as one of the fundamental operations in the supply chain. Basic important factors considered for supplier selection are price, quality (technical ability). The model can be used to understand, describe, analyse and prescribe for supplier selection. In this study, a fuzzy system has been developed for...

Constant stream of data has been generated and stored as more devices are being connected to the internet and supported with cloud technologies. The price drop of such applications along with industry 4.0 trending, triggered an explosive growth and demand for many IT modern solutions. From an industrial point of view, sensorization practices are sp...

In order to reduce the energy consumption of buildings a series of new heating, ventilation and air conditioning strategies, methods, and equipment are developed. The architectural trends show that office and educational buildings have large glazed areas, so the thermal comfort is influenced both by internal and external factors and discomfort para...

Diagnostics of batteries using advanced methods have gained remarkable roles in the past few years. This study focuses on the type of measurements, tests and methods to reveal and classify them. During manufacturing and operation several faults could emerge in batteries including non-optimal operation conditions, operators without experience, and f...

Diagnosis of bearings with advanced methods gained remarkable roles in the previous years. This article focuses on the manufacturing defects and methods to reveal and classify them. During manufacturing several faults could emerge because of the grinding operation, tool wear and chatter vibration. Inproper handling of the bearing parts because of t...

The efficiency and accuracy of the modern positioning systems are crucial points in their design. The designers and engineers are highly motivated to find new methods and solutions to the accuracy problem with the biggest mobility and safety. Considerable numbers of solutions are on the market but only some of them can be used in medical industry....

The efficiency and the range of modern electric vehicles are crucial points in their design. Designers and engineers are highly motivated to find solutions to these problems, or, as a rule, to improve existing electrical systems. Considerable number of modern batteries is available for use in electric vehicles and robots. The authors will propose n...

The article gives a short description of the history of the Support Vector Machine (SVM) method and fuzzy logic and their main parameters. It describes how SVM can be used for classification and regression calculation. In addition, it includes the description of the fuzzy logic and the three main defuzzification methods. Examples will be given to s...

This study briefly presents how we can keep our customers as suppliers in today’s world. This article gives a short review with the help of specialized literature that was written nationally and overseas. The client is the most important partner independent of the type of industry all the time, and this will also remain in the future. The long-term...

Nowadays one of the most important research areas of maintenance and surface treatment is the cold flame-spray technology. The research trend shows a lot of potential in cold flame-spray technology. This kind of technology is used by vehicle, aviation, and shipping industry and we can also find it in many other mechanical areas. Companies have spen...

Der wichtigste Partner der Unternehmen ist immer der Kunde- unabhängig vom Industriezweig - und er wird es auch in der Zukunft bleiben. Ein langfristiger Betriebserfolg kann nur in dem Falle erreicht werden, wenn die Kunden zufrieden sind. Es ist aber nur dann möglich, wenn aufeinander abgestimmte Anstrengungen im Interesse der Kontaktaufnahme und...

This article provides an overview of the development and history of the maintenance. The reader can get information about the definition and importance of customer demand and 'just in time' maintenance strategies, which are the most important concepts in the industrial environment and nowadays in good many other areas, too. One can find these defin...

Nowadays one of the most important research areas of the electric vehicle development is the electric source system for advanced electric cars. Here the main purpose is to reach the greatest possible range. The research trends show a lot of potential in the electric vehicles. Very important are the safety issues, because the batteries store a huge...

A cikk rövid bemutatót nyújt a mikrokontrollerek fejlődéséről, valamint a ma használatos mikrokontrollerekről és azok fontosabb paramétereiről. Röviden ismertetésre kerül a Neumann és Harvard architektúra. A cikk fókuszát egy nyílt forráskódú Arduino mikrokontroller képezi. Egy fejezet az eszköz főbb tulajdonságait mutatja be és a hozzá használatos...

In the first chapter the article provides an overview of the currently used and most popular UGVs in the United States Army driven by battery. In additional, through the UGV’s the AGV is presented, too. The subsequent chapter looks at some of the research results about hybrid and electric UGV’s. The study presented is an Arduino device and some pro...

Az elektromos járművekhez kapcsolódó kutatások, fejlesztések egyre több hajtás- és energia felhasználási problémákat hoznak előtérbe, ennek következménye, hogy egyre több speciális hibrid és teljes elektromos hajtású járműre alakított OBD rendszerek készülnek. A tanulmány a szerző elektromos hajtású jármű OBD kutatásait mutatja be és egy elektromos...

The vehicles in used today provide more and more information for drivers. This information is not only referring of comfort parameters - eg.inside temperature or outside temperature - directly, but also the state of running of the car. Because of the emissions and the timely maintenance are becoming more and more known as an OBD system. This study...

The research in transport sciences is progressively focusing on the electric vehicles. The research and development enlight more and more drive and energy management problems. These problems cause the appearance of lot of special OBD systems for hibrid and electric powered vehicles. This study presents the author's research on an electric powered v...