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    Wyświetlanie 1-6 z 6
    Tytuł:
    Improvement of BSFC and effective NOx and PM reduction by high EGR rates in heavy duty diesel engine
    Autorzy:
    Aoyagi, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/133188.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    exhaust emissions
    turbocharger
    fuel injection
    silnik diesla
    emisja spalin
    turbodoładowanie
    wtrysk paliwa
    Opis:
    The test engine was a turbocharged 10.5L engine with an intercooler. A performance target was set at a rated power of 300 kW (BMEP = 1.7 MPa) and peak torque of 1842 Nm (BMEP = 2.2 MPa). Emission targets were set at a level of near future and stringent regulation standards in Japan. The engine was equipped with new technologies such as a high pressure common rail system, FCD piston, a high pressure ratio VGT and an aftertreatment system. The high and low pressure loop EGR system was installed and this system with a VGT had a high performance and could increase an EGR rate in order to reduce BSNOx while maintaining the satisfied BSFC and PM performance simultaneously not only in the steady state condition but also in the transient condition.
    Źródło:
    Combustion Engines; 2017, 56, 4; 4-10
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Szacowanie wartości rozkładu emisji tlenków azotu w silniku o zapłonie samoczynnym
    Estimating the value of decomposition emissions of nitrogen oxides in the compression ignition engine
    Autorzy:
    Graba, M.
    Mamala, J.
    Bieniek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/133293.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    silnik o zapłonie samoczynnym
    emisja
    tlenek azotu
    estymator
    diesel engine
    emissions
    nitrogen oxide
    estimator
    Opis:
    W niniejszym artykule dokonano eksperymentalnej i numerycznej analizy emisji tlenków azotu zawartych w spalinach silnika o zapłonie samoczynnym. Następnie na podstawie otrzymanych danych pomiarowych sformułowano i rozwiązano problem identyfikacji emisji tlenków azotu zawartych w spalinach. Otrzymane wyniki estymacji emisji tlenków azotu zweryfikowano podczas testów badawczych na badanym obiekcie. Opisano obiekt badań oraz wykorzystany nieliniowy model statyczny emisji tlenków azotu dla układu bez i z recyrkulacją spalin. W artykule wykazano, że zastosowanie odpowiednio przygotowanego modelu matematycznego, pozwala na estymację emisji tlenków azotu zawartych w spalinach silnika o zapłonie samoczynnym pojazdu off-road.
    This article shows the experimental and numerical analysis of emissions of nitrogen oxides contained in the exhaust gas of compression ignition engine. There was formulated and solved the problem how to identify the nitrogen oxides’ emissions in the exhaust gases, based on the measurement data. The results of nitrogen oxides emissions’ estimation were verified during research on the test object. There were also described the object of study and a non-linear static model of nitrogen oxides’ emission for two systems - with and without exhaust gas recirculation. The article shows that the use of a properly prepared mathematical model allows to estimate emissions of nitrogen oxides contained in the exhaust gas of diesel engines in off-road vehicle.
    Źródło:
    Combustion Engines; 2015, 54, 3; 161-169
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance and emissions of a single cylinder diesel engine operating with rapeseed oil and jP-8 fuel blends
    Autorzy:
    Labeckas, G.
    Kanapkienė, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/133075.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    rapeseed oil
    JP-8 fuel
    engine performance
    exhaust emissions
    silnik spalinowy
    olej rzepakowy
    wydajność silnika
    emisja spalin
    Opis:
    The article presents experimental test results of a DI single-cylinder, air-cooled diesel engine FL 511 operating with the normal (class 2) diesel fuel (DF), rapeseed oil (RO) and its 10%, 20% and 30% (v/v) blends with aviation-turbine fuel JP-8 (NATO code F-34). The purpose of the research was to analyse the effects of using various rapeseed oil and jet fuel RO90, RO80 and RO70 blends on brake specific fuel consumption, brake thermal efficiency, emissions and smoke of the exhaust. The test results of engine operation with various rapeseed oil and jet fuel blends compared with the respective parameters obtained when operating with neat rapeseed oil and those a straight diesel develops at full (100%) engine load and maximum brake torque speed of 2000 rpm. The research results showed that jet fuel added to rapeseed oil allows to decrease the value of kinematic viscosity making such blends suitable for the diesel engines. Using of rapeseed oil and jet fuel blends proved themselves as an effective measure to maintain fuel-efficient performance of a Didiesel engine. The brake specific fuel consumption decreased by about 6.1% (313.4 g/kW·h) and brake thermal efficiency increase by nearly 1.0% (0.296) compared with the respective values a fully (100%) loaded engine fuelled with pure RO at the same test conditions. The maximum NOx emission was up to 13.7% higher, but the CO emissions and smoke opacity of the exhaust 50.0% and 3.4% lower, respectively, for the engine powered with biofuel blend RO70 compared with those values produced by the combustion of neat rapeseed oil at full (100%) engine load and speed of 2000 rpm.
    Źródło:
    Combustion Engines; 2015, 54, 3; 13-18
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of combustion and emissions of diesel engine fuelled with FAME and HVO
    Autorzy:
    Hunicz, Jacek
    Krzaczek, Paweł
    Gęca, Michał
    Rybak, Arkadiusz
    Mikulski, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/2097506.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    renewable fuels
    HVO
    hydrotreated vegetable oil
    emissions
    silnik Diesla
    paliwa odnawialne
    hydrorafinowany olej roślinny
    emisje
    Opis:
    This study investigates combustion and emission characteristics of a contemporary single-cylinder compression ignition engine fuelled with diesel, fatty acid methyl esters (FAME) and hydrotreated vegetable oil (HVO). These two drop-in fuels have an increasing share in automotive supply chains, yet have substantially different physical and auto-ignition properties. HVO has a lower viscosity and higher cetane number, and FAME has contrary characteristics. These parameters heavily affect mixture formation and the following combustion process, causing that the engine preoptimized to one fuel option can provide deteriorated performance and excess emissions if another sustainable option is applied. To investigate the scale of this problem, injection pressure sweeps were performed around the stock, low NOx and low PM engine calibration utilizing split fuel injection. The results showed that FAME and HVO prefer lower injection pressures than diesel fuel, with the benefits of simultaneous reduction of all emission indicators compared to DF. Additionally, reduction of injection pressure from 80 MPa to 60 MPa for biodiesels at low engine load resulted in improved brake thermal efficiency by 1 percentage point, due to reduced parasitic losses in the common rail system.
    Źródło:
    Combustion Engines; 2021, 60, 1; 72--78
    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
    Tytuł:
    Measurement of flame temperature and soot amount for effective NOx and PM reduction in a heavy duty diesel engine
    Autorzy:
    Aoyagi, Yuzo
    Powiązania:
    https://bibliotekanauki.pl/articles/132846.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    Diesel engine
    exhaust emissions
    NOx
    PM
    EGR
    BSFC
    flame temperature
    two-color method
    video camera
    silnik Diesla
    emisje spalin
    temperatura płomienia
    metoda dwubarwowa
    kamera wideo
    Opis:
    To reduce exhaust NOx and smoke, it is important to measure flame temperature and soot amount in combustion chamber. In diesel combustion it is effective to use the two-color method for the measurement of the flame temperature and KL factor, which is related with soot concentration. The diesel flame was directly and continuously observed from the combustion chamber at running engine condition by using a bore scope and a high-speed video camera. The experimental single cylinder engine has 2.0-liter displacement and has the ability with up to five times of the boost pressure than the naturally aspirated engine by external super-charger. The devices of High Boost, Wide Range and High EGR rate at keeping a relatively high excess air ratio were installed in this research engine in order to reduce exhaust NOx emission without smoke deterioration from diesel engines. The video camera nac GX-1 was used in this study. From observed data under the changing EGR rates, the flame temperature and KL factor were obtained by the software of two-color method analysis. The diesel combustion processes are understood well by analyzing high-speed movies of the diesel flame motion and its temperature. The NOx and smoke are mutually related to maximum flame temperature and also it is possible to reduce simultaneously both NOx and soot emissions by high EGR rate in a single cylinder diesel engine.
    Źródło:
    Combustion Engines; 2019, 58, 4; 32-39
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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