Факультет транспорту та інженерії
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Item type:Наукова стаття, Using of the Trucks with Electrical Drive on the Farm Enterprises(2024) Dembitskyi, Valerii; Sakhno, Volodymyr; Murovanyi, Igor; Maiak, MykolaA problem of using of the electric drive trucks on the farm enterprises was investigated in present research work. According to the results of the litera-ture sources analysis there was found a great interest of scientists and users concerning the usage of the commercial electric vehicles in the agriculture. There was made a mathematical modeling of the power consumptions by trucks of gross weight 4000, 8000, 10000 and 12000 kg taking into account their different operating conditions, a movement by an asphalt concrete, road-metal, ground pavement. There was determined that a vehicle move-ment on a pavement with a high value of rolling resistance coefficient leads to an abrupt increasing of the power consumption, up to 2…2,5 times. There was made a comparison of the values of received power consumptions with the results that were received by another scientists using another research methods. A deviation of received results of the specific power consumptions consists within 5…20 %, that is accessible and says about their sufficient convergence. A perspective of further investigations should be directed to a possibility of quick replenishment of the power supply, a determination of rational correlation between different power sources, and to a receiving of detailed characteristics of the vehicles operating conditions that are used in the agriculture.Item type:Наукова стаття, Modeling and Analysis of Electric Bus Energy Consumption Considering Topography and Driving Modes(2026) Dembitskyi, Valerii; Samostian, Viktor; Kotenko, Viktoria; Sitovsky, OlegThis article explores current issues related to the use of electric buses in urban and suburban passenger transportation systems. The importance of a rational selection of traction battery parameters is justified, taking into account the required driving range and the influence of factors that reduce battery longevity and energy efficiency. A review of recent research confirms that electric energy consumption depends on operating conditions, driving modes, driver characteristics, road and climate conditions, and the design features of the vehicle. A methodology for calculating energy consumption is proposed based on the principles of vehicle motion theory, with consideration of dynamic driving conditions, road gradients, and regenerative braking efficiency. The object of study is the Solaris Urbino electric LE 8.9 electric bus, which was simulated along a real-world route (“Mlyniv – Lutsk”). Based on the obtained results, an analysis of the influence of various factors on energy consumption was conducted. The results showed that the longitudinal road profile has a minor effect under flat terrain conditions, whereas regenerative braking significantly reduces overall energy consumption. The results were validated through comparison with empirical data, confirming the adequacy of the proposed model. The presented approach can be used for electric transport planning, energy consumption optimization, and the development of requirements for charging infrastructure.Item type:Наукова стаття, STUDY OF ENERGY CONSUMPTION BY TROLLEYBUSES MOVING UNDER REGULATED TRAFFIC CONDITIONS(2024) Budnychenko, Igor; Dembitskyi, Valerii; Podpisnov, Vladyslav; Dykyi, VladyslavAt the current stage of development of electric transport, the task of studying the energy efficiency of such vehicles is still relevant. Various models of electricity consumption developed and proposed by scientists still do not reflect the actual energy consumption of vehicles. A particular problem in such studies is the need to take into account the amount of electricity recovered by the engine. The analysis of the literature shows a variety of approaches to modeling electricity consumption that take into account the actual operating conditions of vehicles. In this paper, we have studied the consumption of electric energy by trolleybuses moving along established routes in Vinnytsia. Based on the results of the studies, the total amount of energy consumed, the amount of energy consumed by the traction electric drive, the total amount of recovered energy, and the amount of recovered energy returned to the contact network were determined. The data obtained were processed and it was determined that the difference between the amount of electric energy recovered by the vehicle traction motor and the total amount of recovered electric energy sent to the contact network is 6...14 %, while the amount of electric energy recovered by the vehicle traction motor ranges from 7 to 27 % of the electric energy consumed by the electric drive. The research results obtained indicate significant losses of part of the electrical energy recovered by the engine, as well as a significant variation in the amount of recovered energy, depending on the route. Further research should be aimed at improving mathematical models of electric energy consumption, taking into account the specific operating conditions of vehicles.Item type:Наукова стаття, Management of Sustainable Development of Car Service Enterprises(2023) Dembitskyi, Valerii; Murovanyi, Іgor; Maiak, Mykola; Pavlova, IrynaThe effective activity of road transport enterprises depends on the chosen strategy of enterprise management. The urgent role is the effectiveness of the use of a risk-oriented approach to the management and planning of the enterprise. The article, using the method of hierarchy analysis and probabilistic method, identifies and determines the contribution of risks. The factors that form the risks of road transport enterprises’ activities are defined for these types of enterprises. It has been found that the application of the hierarchy analysis method is a more time-consuming process and provides a deeper analysis of each risk. The probabilistic method is easier to apply, but it requires a high qualification of experts who will assess the risks. The results of surveys conducted by road transport enterprises indicate the application of elements of a risk-oriented approach. The availability of risk information makes it possible to implement appropriate precautions not only within an individual enterprise, but also on a more global scale.Item type:Наукова стаття, Research of an Influence of a Traffic Flow Movement Intensity Change on the Possibility of Nonstop Passage of the Traffic Lights Objects(2022) Mazyliu, Pavlo; Sitovskyi, Oleg; Prentkovskis, Olegas; Dembitskyi, Valerii; Murovanyi, Igor; Bulik, YuriiThere were examined the problems of passage of the regulated parts of a road. There were investigated the changes of a traffic movement intensity in Lutsk (Ukraine) during the spread of Covid-19 pandemic. The graphic dependences of the drivers’ actions estimation while passing the traffic lights objects on a chosen movement route at the beginning of quarantine measures, during the least movement intensity and at the increasing of movement intensity, were obtained. A method of increasing of a possibility of the traffic lights objects nonstop passage was offered.Item type:Наукова стаття, Comparative Estimation of Maneuverability of the Multi-Track Road Trains of Different Layout Schemes(2025) Sakhno, Volodymyr; Murovanyi, Igor; Razboinikov, Oleksandr; Palamarchyk, Olekcii; Dembitskyi, ValeriiToday, in the constructions of multi-link road trains, two main layout schemes are used, as a rule - trailer (car + n trailers) and semi-trailer (tractor car + n semi-trailers). Previously conducted studies established that the maneuverability indicators of the road trains can be determined on wheels rigid in the lateral direction, that is, according to kinematic models, which are based on the angles of assembly of the road train links. These angles are defined for both a three-link trailer and a semi-trailer vehicle train, for different locations of the extended link. For the semi-trailer road trains, the requirements for maneuverability are not met, and therefore the trailer links must be equipped with more or less complex control systems. With a direct control drive on the front axles of the second and third semi-trailers, when turning at 90º and 180º, only the first layout scheme satisfies the requirements for maneuverability.