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    Wyświetlanie 1-5 z 5
    Tytuł:
    Energy efficiency in rail vehicles: analysis of contemporary technologies in reducing energy consumption
    Autorzy:
    Skobiej, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/32222591.pdf
    Data publikacji:
    2023-12-28
    Wydawca:
    Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
    Tematy:
    energy efficiency
    rail vehicles
    energy consumption
    fuel cells
    optimization
    Opis:
    The article focuses on the problem of energy intensity in rail vehicles and analyzes current technologies aimed at reducing it. The author discusses innovations and strategies aimed at increasing energy efficiency in rail transportation. He also outlines the challenges of reducing energy consumption in this sector and future development prospects. The main focus of the article is on the problem of energy demand in rail vehicles, with a special emphasis on railroads. The author analyzes the current challenges of high energy consumption in rail transportation and presents various technologies that have been introduced to minimize this consumption. The article includes descriptions of technological innovations such as advanced energy management systems, efficient braking systems that recover energy, and the use of low aerodynamic drag materials. The author also discusses strategies to improve the energy efficiency of rail vehicles, including both existing ones and those planned for market introduction. One of the key points of the article is also a presentation of the challenges of reducing energy consumption in the rail sector. These include the need to adapt existing infrastructure, the financial aspects of introducing new technologies, and acceptance by consumers and operators, among others.
    Źródło:
    Rail Vehicles/Pojazdy Szynowe; 2023, 3-4; 64-70
    0138-0370
    2719-9630
    Pojawia się w:
    Rail Vehicles/Pojazdy Szynowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of ecological extremes of vehicles in road emission tests
    Autorzy:
    Pielecha, Jacek
    Skobiej, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/1833638.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    exhaust emission
    passenger cars
    real driving emissions
    optimization
    emisja spalin
    samochody osobowe
    badania emisji spalin
    optymalizacja
    Opis:
    New testing procedures for determining road emissions of exhaust pollutants for passenger vehicles were established in 2018. New road testing procedures are designed to determine actual exhaust emissions, which may not always reflect laboratory emissions. Test procedures for the emission of pollutants in real traffic conditions are divided into four stages. The latest research on the emission of pollutants from motor vehicles in road traffic conditions, carried out using mobile measuring systems, reflects the actual ecological state of vehicles. The article compares the results of exhaust emissions obtained in road tests using the latest legislative proposals for passenger cars. Then, an attempt was made to determine the engine operating parameters in which exhaust road emission would be the lowest. Solution scenarios were defined as part of permissible changes to dynamic parameters that are included in European legislation on RDE testing. For this purpose, an optimization tool was used, allowing on the basis of given input data to determine the minimum objective function, defined as the smallest emission value of individual harmful compounds. The results of the exhaust gas emissions in the RDE test were used to determine the road emissions of individual harmful compounds. A thorough analysis of the emission intensity of individual compounds has shown that it is possible to approximate such values using functional rela-tionships or adopting them as a constant value. This division was used to determine the extremes (in this case the minima) of the objective function (minimum road emissions of harmful exhaust components). This task resulted in obtaining (within the permissible tolerances of all driving parameters and durations of individual road test sections) the value of exhaust emissions in the range from 26% to 81% lower than in the actual road test. This means that there is a tolerance range, where you can obtain the value of emissions in road tests. As a result, you can use the process of determining the minimum emissions tests RDE calibration of the drive units already at the stage of preparation so that in the real traffic conditions characterized by the lowest exhaust emissions.
    Źródło:
    Archives of Transport; 2020, 56, 4; 33-46
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen
    Autorzy:
    Pielecha, Ireneusz
    Szwajca, Filip
    Skobiej, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/32103224.pdf
    Data publikacji:
    2023-11-30
    Wydawca:
    Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
    Tematy:
    hydrogen engine
    engine simulation
    hydrogen combustion
    methane combustion
    combustion indicator
    turbulent jet ignition engine
    Opis:
    The modern solution of two-stage combustion, namely the Turbulent Jet Ignition (TJI), enables the combustion of ultra-lean mixtures. Thanks to this solution, it became possible to reduce fuel consumption and, at the same time, to increase the combustion process indicators (including the overall combustion system efficiency). The article presents the results of numerical tests of a heavy-duty engine equipped with the TJI system running on gas fuels. The AVL BOOST software was used to analyze the effects of different fuel injection rates into the pre-chamber and various ignition timing angles, while maintaining a constant global excess air ratio. Increasing the proportion of hydrogen in the prechamber resulted in its reduction in the main chamber (the fuel dose was kept constant with different excess air coefficients in each of the chambers). The maximum combustion pressure values in both chambers were investigated. Changes in the amount of heat released and its release rate were determined. As a result of the simulations, different ignition and combustion conditions were presented for the tested fuels. Based on this, maps of fuel dose to prechamber vs. ignition advance angle were drawn up, showing selected thermodynamic indicators of the combustion process.
    Źródło:
    Rail Vehicles/Pojazdy Szynowe; 2023, 1-2; 46-57
    0138-0370
    2719-9630
    Pojawia się w:
    Rail Vehicles/Pojazdy Szynowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of driver assistance systems in rail vehicles
    Analiza systemów wspomagania prowadzącego w pojazdach szynowych
    Autorzy:
    Andrzejewski, Maciej
    Szerbart, Ryszard
    Skobiej, Kinga
    Nowak, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/32222707.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
    Tematy:
    assistance system
    driver
    dispatcher
    automation
    rail transport
    rail
    control
    intelligent communication system
    system wspomagania
    maszynista
    dyspozytor
    automatyzacja
    transport szynowy
    kolej
    sterowanie
    system inteligentnej komunikacji
    Opis:
    Issues related to the automation of assistance systems for drivers and dispatchers are now increasingly more widely introduced including in rail transport. The article presents the activities and solutions of selected manufacturers, both in terms of a single rail vehicles as well as railway control system. These solutions are aimed at increasing safety, saving electricity and assisting in making decisions by dispatchers. Thereafter in the article, new systems supporting the driver in order to minimize energy consumption were also described, which are already used in railways in Germany, as well as the European system of intelligent communication in rail transport.
    Zagadnienia dotyczące automatyzacji systemów wspomagania maszynistów oraz dyspozytorów są obecnie coraz szerzej wprowadzane również w transporcie szynowym. W artykule przedstawiono działania oraz rozwiązania wybranych producentów, zarówno w zakresie pojedynczego pojazdu szynowego, jak i systemowego sterowania koleją. Rozwiązania te mają na celu zwiększenie bezpieczeństwa, oszczędność energii elektrycznej oraz pomoc w podejmowaniu decyzji dyspozytorów. W dalszej części artykułu opisano również nowe systemy wspierające pracę maszynisty w celu minimalizacji zużycia energii, które już teraz są wykorzystywane w kolei w Niemczech, a także zaprezentowano europejski system inteligentnej komunikacji w transporcie kolejowym.
    Źródło:
    Rail Vehicles/Pojazdy Szynowe; 2020, 4; 25-32
    0138-0370
    2719-9630
    Pojawia się w:
    Rail Vehicles/Pojazdy Szynowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cold start emissions of passenger cars with gasoline and diesel engines in Real Driving Emissions tests
    Autorzy:
    Pielecha, Jacek
    Merkisz, Jerzy
    Kurtyka, Karolina
    Skobiej, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/133895.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    exhaust emission
    passenger cars
    Real Driving Emissions
    emisja spalin
    samochody osobowe
    rzeczywiste emisje z jazdy
    Opis:
    Modernization of passenger cars and constant development of existing legislation lead to a reduction of exhaust emissions from these vehicles. In accordance with package 3 of the RDE test procedure, the European Commission has extended testing methods by including exhaust emissions during a cold start. The article compares the research results on the impact of ambient temperature during the cold start of spark-ignition and compression-ignition engines in road emission tests. The tests were carried out in line with the requirements of the RDE test procedure for passenger cars meeting the Euro 6d-Temp emissions standard. The obtained results were analyzed, i.e. there were compared the engine and vehicle operation parameters and the values of road exhaust emissions, during the cold start of gasoline and diesel engines at the ambient temperature of approximately 25°C. The summary presents the share of cold start phase of a passenger car (at the ambient temperature of around 25°C) for each exhaust emission compound in the urban part of the test, and in the entire RDE test, depending on the engine type used.
    Źródło:
    Combustion Engines; 2019, 58, 4; 160-168
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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