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    Wyświetlanie 1-5 z 5
    Tytuł:
    Engine testing of RME additives
    Autorzy:
    Żółtowski, A.
    Grzelak, P. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/244303.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    renewable fuels
    specific emissions of pollutants
    Opis:
    Reducing the emission of pollutants emitted from motor vehicles, and now also in greenhouse gas emissions, is a result of European Union policy. Vehicle design changes are just one way of reducing emissions of harmful substances and greenhouse gases. The second way is to change the type of fuel, by which the vehicle's engine is powered, that is the substitution of conventional fossil fuels derived from crude oil, such as gasoline or diesel fuel by so-called renewable fuels, for which the CO2 emissions are measured not only in the engine exhaust system, but also by analysis "from the source to the wheel" WTW (Well-to-wheel) - is much smaller. As part of this task the Directive 2009/28/EC introduced for all Member States to the use of renewable energy, biofuels, alternative fuels to a certain extent share of the energy and conventional fuel by 2020. This paper presents the results of measurements of emissions on the dynamometer with a diesel engine powered by six kinds of mixtures of diesel oil and rapeseed oil methyl ester (RME) – with esters containing 0 (clean diesel), 20, 40, 60, 80 and 100 (pure rapeseed oil methyl esters)% in the fuel. We analysed the reasons for the impact of changes in fuel composition on selected limited exhaust components. We found, that the addition of esters of rapeseed oil to the diesel fuel can be a reason of reducing the emissions of CO, CO2, and THC in the exhaust gases of tested engine and increased emissions of NOx and PM.
    Źródło:
    Journal of KONES; 2013, 20, 4; 511-516
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study on performance and emission characteristics of lean burn SI engine fuelled with hydrogen methane blends
    Badania silnika spalinowego ZI zasilanego nadstechiometryczną mieszanką metanu z wodorem
    Autorzy:
    Przybyła, G.
    Nagaraja, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/133095.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    IC engine
    hydrogen
    indicated efficiency
    specific emissions
    silnik spalinowy ZI
    wodór
    sprawność indykowana
    wskaźniki emisji
    Opis:
    An experimental study on the performance and exhaust emissions of a spark ignition engine fueled with methane(CH4)-hydrogen (H2) blends was carried out at a constant speed of 1500 rpm and fixed excess air ratio (λ) of 1.5. The tests were carried out for pure methane and 2 blends (93% (by vol.) CH4 + 7% (by vol.) of H2, 77% (by vol.) CH4 + 23% (by vol.) of H2) at part load conditions in a naturally aspirated, three cylinder engine with a compression ratio of 9.3:1. The effects of hydrogen addition was studied at various spark timing and it is observed that the Maximum Brake Torque timing (MBT) retarded with increase in concentration of hydrogen. The coefficient of variation in indicated mean effective pressure (COVimep) decreases in blends, indicating stable combustion with hydrogen enrichment. A decrease in burn duration is observed and the crank angle at which peak pressure occurred, is tending towards top dead center (TDC) with increase in concentration of hydrogen due to higher laminar flame speed of the mixture enriched with hydrogen. In case of blends, specific emissions of carbon monoxide (CO) and unburned hydrocarbons (HC) decreases. However, there is considerable increase in specific emissions of oxides of nitrogen (NOx).
    Przeprowadzono badania eksperymentalne energetycznych parametrów pracy silnika spalinowego ZI oraz jego oddziaływania na środowisko naturalne podczas zasilania mieszaniną metanu z wodorem. Analizowano pracę silnika podczas spalania mieszanki ubogiej (λ = 1,5) przy stałej prędkości obrotowej wynoszącej 1500 obr/min. Badania wykonano dla zasilania czystym metanem oraz dwiema mieszankami o różnym udziale objętościowym wodoru tj. 7% H2, 93% CH4 oraz 23% H2, 77% CH4. Badano wpływ kąta wyprzedzenia zapłonu na przebieg procesu spalania. Zaobserwowano, że optymalna wartość kąta wyprzedzenia zapłonu zmniejsza się dla wyższej zawartości wodoru w mieszance palnej. Ponadto wskaźnik sygnalizujący poziom niepowtarzalności pracy indykowanej w kolejnych cyklach roboczych osiąga niższe wartości dla mieszanek wzbogaconych wodorem, co oznacza stabilniejszy przebieg procesu spalania. Spalanie mieszanek metanu z wodorem prowadzi do nieznacznego ograniczenia emisji CO oraz HC, natomiast wielkość emisji NOx rośnie za sprawą wyższej temperatury spalania dla mieszanki CH4 , H2.
    Źródło:
    Combustion Engines; 2015, 54, 3; 556-562
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tests of urban bus specific emissions in terms of currently applicable heavy vehicles operating emission regulations
    Autorzy:
    Merkisz, J.
    Rymaniak, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/133549.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    bus
    drive system
    hybrid
    real operating conditions
    RDE
    specific emissions
    autobus
    układ napędu
    hybryda
    warunki drogowe
    wskaźniki emisji
    Opis:
    The article presents a study of a city bus in real operating conditions (RDE) from the perspective of the latest regulations for the assessment of specific emissions compliance for heavy-duty vehicles (Euro VI standard). The object of the research was a serial configuration hybrid drive vehicle. Measurements were made in the real driving conditions in Poznan agglomeration. The latest mobile equipment PEMS was used for the measurements. This article presents the details of the EU 582/2011 Procedure in operational conformity assessment, the methodology of the study was discussed, and the obtained results were presented, both in terms of vehicle operating conditions and engine operation, as well as specific emissions evaluation.
    Źródło:
    Combustion Engines; 2017, 56, 1; 21-26
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Empirical study of the effect of the air filter on the performance and exhaust emissions of a diesel engine
    Autorzy:
    Dziubak, Tadeusz
    Karczewski, Mirosław
    Dziobek, Ilona
    Powiązania:
    https://bibliotekanauki.pl/articles/24202461.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    internal combustion engine
    air filter pressure drop
    engine power
    specific fuel consumption
    exhaust emissions
    silnik spalinowy
    spadek ciśnienia w filtrze powietrza
    moc silnika
    jednostkowe zużycie paliwa
    emisja spalin
    Opis:
    The results of an experimental study of the effect of the pressure drop of the air filter pf on the operating parameters and exhaust emissions of a modern CI internal combustion engine of a truck equipped with an electronically controlled power system are presented. The tests were carried out for an air filter with a clean filter cartridge Δpf0 = 0.58 kPa and with a cartridge contaminated after a service mileage (about 50 thousand km) ΔpfD = 2.024 kPa. In each test, engine performance, exhaust emissions and relative change in emissions were determined: CO, NOx, HC, CO2, H2O. It was found that an increase in the filter resistance pf causes a decrease in the filling degree by 12%, engine useful power by almost 10%, exhaust gas temperature by a maximum of 30oC and an increase in specific fuel consumption by almost 5%. Air filter resistance has no significant effect on NOx emissions and HC concentration. There is a reduction in H2O emissions by up to 7%, CO by up to 13% and CO2 by up to 4%, and an increase in oxygen emissions by 15%, depending on operating conditions.
    Źródło:
    Combustion Engines; 2023, 62, 2; 94--111
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental investigation biodiesel-n-butanol fuels blends on performance and emissions in the diesel engine
    Autorzy:
    Labeckas, Gvidonas
    Slavinskas, Stasys
    Mickevičius, Tomas
    Powiązania:
    https://bibliotekanauki.pl/articles/2097621.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    biodiesel
    n-butanol
    lubricity
    brake specific fuel consumption
    engine efficiency
    emissions
    smoke opacity
    silnik diesla
    smarność
    jednostkowe zużycie paliwa przez hamulce
    sprawność silnika
    emisje
    zadymienie spalin
    Opis:
    The paper presents the experimental test results reflecting the comparative changes in the performance efficiency and emissions of the exhaust of a naturally aspirated, four-stroke, single-cylinder, air-cooled diesel engine due to its transition from neat rapeseed oil biodiesel to fuel blends prepared by mixing in various proportion (by volume) rapeseed methyl ester (B) and butanol (Bu). The lubricity properties of biodiesel-n-butanol fuel blends were studied using HFRR method. In contrast to previous works, the undertaken investigation is performed with a totally renewable, binary liquid biofuel blends. The purpose of the research is to reduce simultaneously the production of NOx emissions and the exhaust smoke with respect to neat biodiesel due to potentially improved homogeneity of combustible mixture and particulate matter emissions benefits suggested by the higher oxygen content (21.62 wt%) and the relatively lower carbon-to-hydrogen ratio (4.8) of the normal n-butanol. The tests revealed that the brake specific fuel consumption for the binary biodiesel-n-butanol fuel blends is always higher than that neat biodiesel produces under the same loading conditions. Maximum nitrogen oxide (NOx) emissions were obtained with the engine running on neat biodiesel (2290 ppm). At full (100%) load conditions, the lowest NOx emission was obtained with the engine running on a biofuel BBu20 blend. The lowest level of carbon monoxide emissions (CO) was observed, when engine running with the most butanol-oxygenated biofuel blend BBu20.The highest smoke opacity of the exhaust was obtained when the engine was fuelled with neat biodiesel and at full load.
    Źródło:
    Combustion Engines; 2022, 61, 1; 90--95
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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