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    Wyświetlanie 1-6 z 6
    Tytuł:
    A review of approaches to the study of weather’s effect on road traffic parameters
    Autorzy:
    Jarmuż, Dominika
    Chmiel, Jerzy
    Powiązania:
    https://bibliotekanauki.pl/articles/1841153.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    road traffic
    driving conditions
    weather
    meteorological factors
    ruch drogowy
    warunki jazdy
    pogoda
    czynniki meteorologiczne
    Opis:
    The paper describes selected research achievements into the effect of weather on road traffic from the perspective of various combinations of traffic characteristics and meteorological conditions. Studies to date have focused on different traffic parameters and changes in them as a consequence of weather variety. In making a comparative analysis, researchers identify the optimal weather conditions for road traffic and driver perception. Research in this field is conducted using a variety of data resources, backgrounds, and methodologies. The review of papers shows that results may be strongly dependent on the subject region (especially the climate zone), human behavior, and the legal framework (e.g., speed restrictions). However, the local view is important as well, and information regarding specific road attributes should not be overlooked. Comparison of the results of individual studies can be problematic owing to the myriad of different methodologies, so the description of any analysis of weather’s effect on road traffic parameters must include detailed information about the researcher’s specific approach to the problem as the following paragraphs of the paper advocate.
    Źródło:
    Transport Problems; 2020, 15, 4, cz. 2; 241-251
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the use of hybrid electric powertrain system in urban traffic conditions
    Ocena zastosowania napędów hybrydowych w warunkach ruchu miejskiego
    Autorzy:
    Szumska, Emilia
    Jurecki, Rafał
    Pawełczyk, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/301489.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    hybrid electric vehicles
    real-world conditions
    fuel economy
    air pollutants
    hybrydowe układy napędowe
    rzeczywiste warunki jazdy
    zużycie paliwa
    emisja
    Opis:
    The conditions of use of the vehicle significantly affect the performance results. Traffic conditions in a specific city directly affect the consumption of energy, fuel and emissions of harmful compounds in exhaust fumes. Conduction of the measurements of a vehicle’s performance parameters in operating conditions is very troublesome and is often not possible to realize. An alternative is to use the simulation programs. Vehicle simulation programs offer options related to vehicle models or drive unit components and allow development of new models. Based on the results of simulation testing, it is possible to analyse the level of fuel and energy consumption as well as emissions of harmful compounds in exhaust gases and the operating effectiveness of the drive system in the speed profile. The paper presents the evaluation of the effectiveness of using hybrid electric drive system in passenger cars in medium-sized city traffic conditions using the Kielce example. The simulation tests were based on the speed profiles recorded during real-world test drives in various times of the day. The simulation results were used to conduct an analysis of fuel consumption and pollutant emissions recorded by conventional and hybrid vehicles.
    Warunki użytkowania pojazdu mają znaczący wpływ na parametry eksploatacyjne pojazdu. Warunki ruchu w określonym mieście bezpośrednio wpływają na zużycie energii, paliwa i poziom emisji szkodliwych związków zawartych w spalinach. Przeprowadzenie pomiarów parametrów eksploatacyjnych pojazdu w warunkach rzeczywistych jest kłopotliwe i często niemożliwe do zrealizowania. Alternatywą jest wykorzystanie symulacji komputerowych. Programy do symulacji pojazdów oferują, między innymi, modele pojazdów lub komponentów układu napędowego oraz pozwalają na opracowanie nowych modeli. Na podstawie wyników badań symulacyjnych możliwa jest analiza poziomu zużycia paliwa, energii, emisji szkodliwych związków zawartych w spalinach oraz efektywności pracy układu napędowego w profilu prędkości. W niniejszej pracy przedstawiono ocenę efektywności zastosowania napędów hybrydowych w samochodach osobowych w warunkach ruchu miasta średniej wielkości na przykładzie Kielc. Do badań symulacyjnych wykorzystano profile prędkości, zarejestrowane podczas rzeczywistych przejazdów w różnych porach dnia. Na podstawie wyników symulacji przeprowadzono analizę zużycia paliwa oraz emisji zanieczyszczeń, zarejestrowanych dla pojazd z napędem konwencjonalnym oraz pojazdów z napędem hybrydowym.
    Źródło:
    Eksploatacja i Niezawodność; 2020, 22, 1; 154-160
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of energy management strategies for hybrid electric vehicles in urban driving conditions
    Autorzy:
    Pielecha, I.
    Cieślik, W.
    Fluder, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/134210.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    hybrid electric vehicles
    energy management
    electric range
    real driving conditions
    samochody hybrydowe
    zarządzanie energią
    zasięg elektryczny
    rzeczywiste warunki jazdy
    Opis:
    The pursuit of fuel consumption reduction by vehicles leads to a sudden increase in the share of hybrid and electric drives in the vehicle market. Replacing hybrid vehicles with electric vehicles requires long-term technological solutions, both for the infrastructure and the vehicles themselves. Therefore, one of the leading types of passenger car drives is currently the hybrid drive. The generated work share of electric drives used to power hybrid vehicles is a determinant of the viability of using electric drives. The article estimates the operating time share of electric and hybrid modes operation in real driving conditions (RDC) based on the latest Toyota hybrid model. The research object was a vehicle from the crossover group equipped with a fourth generation hybrid drive. Analysis of the drive's operation allowed to determine the conditions of energy flow and determine the work share of the electric drive in the total driving time.
    Źródło:
    Combustion Engines; 2018, 57, 2; 14-18
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Passenger cars and heavy duty vehicles exhaust emissions under real driving conditions
    Autorzy:
    Merkisz-Guranowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/223645.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    passenger cars
    heavy duty vehicles
    exhaust emissions
    vehicle testing
    real driving emissions
    samochody osobowe
    pojazdy ciężarowe
    emisja spalin
    badania pojazdu
    warunki jazdy
    Opis:
    In the assumptions regarding to the transport policy both at the level of country and Europe there is the concept of sustainable development of transport. Warsaw University of Technology in cooperation with Poznan University of Technology performs research work concerning the shaping of environmentally friendly transport system – Project EMITRANSYS. In this project, one of the conditions is to reduce exhaust emissions by means of transport. The paper presents the reasons for the testing of the exhaust emissions under Real Driving Emissions testing (RDE). Research potential of Institute of Combustion Engines and Transport at Poznan University of Technology in the area of road testing of passenger and heavy-duty vehicles has been presented in the paper. Example test results have been shown in the aspect of the emission-related classification of vehicles.
    Źródło:
    Archives of Transport; 2014, 31, 3; 47-59
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of drive mode of a hybrid drive system on the energy flow indicators in the RDE test
    Autorzy:
    Fluder, K.
    Pielecha, I.
    Cieślik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/133194.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    hybrid electric vehicles
    energy management
    electric range
    real driving conditions
    real driving emissions test
    samochody hybrydowe
    zarządzanie energią
    zasięg elektryczny
    rzeczywiste warunki jazdy
    test rzeczywistej emisji cząstek
    Opis:
    The drive to reduce fuel consumption of vehicles equipped with internal combustion engines leads to an increasing share of hybrid drives used in various means of transport. Such hybrid vehicles, thanks to the use of diesel-electric drive systems, allow for a fuel consumption reduction, and thus to reduce the carbon dioxide emissions. This fuel consumption reduction results from a specifically selected energy flow strategy in hybrid systems. This strategy was the focus of the research performed in order to identify the energy flow conditions in a hybrid drive system in driving conditions corresponding to the RDE test. A Lexus LS 500h vehicle was tested in two drive modes, while determining the related energy flow conditions, including the operating conditions of: electric motors, internal combustion engine and battery. Energy balance was determined taking into account the high voltage battery discharge and charging energy as well as the energy recovered during regenerative braking. It was found that in the RDE test conditions the vehicle is in electric mode for over 30% of the distance and 35% of the drive time, with the energy balance of the vehicle being positive (SOCend > SOCstart). Additionally, it was pointed out that the time spent in the electric mode when driving in urban conditions is about 50% and decreases to about 15% for highway conditions.
    Źródło:
    Combustion Engines; 2018, 57, 4; 18-25
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Real-time emissions of gaseous pollutants from vehicles under heterogeneous traffic conditions
    Autorzy:
    Goyal, Yuvraj
    Meena, Sanu
    Singh, Suresh Kumar
    Kulshrestha, Mukul
    Powiązania:
    https://bibliotekanauki.pl/articles/27311334.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    real-world driving emissions
    portable emission measurement system
    heterogeneous traffic condition
    rzeczywiste emisje podczas jazdy
    przenośny system pomiaru emisji
    niejednorodne warunki ruchu drogowego
    Opis:
    Air quality problems in cities are often a cause for worry. The air quality index is increasing daily, leading to an increase in cancer and many respiratory problems. Road transport in an urban area is a significant cause of air pollution. The vehicles must meet Indian emission regulations for which the emissions are measured using legally mandated standard driving cycles that did not accurately reflect real-world driving emissions because of varying traffic conditions, meteorological conditions, driving behaviour, vehicle power, performance, etc. This study focuses on real-time emissions of gaseous pollutants hydrocarbon (HC), carbon dioxide (CO2), carbon monoxide (CO), and nitric oxide (NO) from vehicle exhaust pipes under heterogeneous traffic conditions. The emissions were measured using a Portable Emission Measurement System (PEMS). The PEMS used was an AVL MDS 450 analyser mounted on the vehicle, and onroad emissions were captured. The test sample consists of four passenger vehicles with varying engine sizes, manufacturers, and fuel. The test route comprises city and highway areas, and it was discovered that the emissions were reduced by 40 to 70% on highways compared to the city. In petrol BSIV and BSVI engines, the emission was reduced to 41.73% for CO, 46.90% for HC, and 64% for NO in the city area. Speed and emissions scatter graphs were plotted for the vehicles, and it was found that in the city area, the optimum speed for less emission is between 30-40 km/h, and on highways, the optimum speed is 80-90 km/h. The emissions were also sensitive to the rate and frequency of acceleration and decelerations. This type of study is very limited in India, and more such studies are required for the assessment of air quality in metropolitan areas and successful traffic management strategies, as well as for determining instantaneous projections of pollutant emissions.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2023, 118; 55--75
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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