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    Wyświetlanie 1-8 z 8
    Tytuł:
    Application and comparison of soy based biodiesel fuel to ultra low sulfur diesel fuel in a HPCR diesel engine - part I: engine performance parameters
    Autorzy:
    Mathur, V. K.
    Moscherosch, B. W.
    Polonowski, C. J.
    Naber, J. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/243662.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    biodiesel
    EGR
    injection timing
    performance
    Opis:
    In the US transportation sector uses two-thirds of the country's total oil consumption. In order to minimize the consumption in this sector there is a need to investigate alternate sources of energy. Biodiesel is a possible alternative to conventional diesel. Biodiesel has many characteristics similar to petroleum based diesel and can be blended with petroleum. However biodiesel's differences in fuel properties including viscosity, bulk modulus, density, and energy content can have significant impacts on engine performance parameters like BSFC and thermal efficiency. As the availability of biodiesel fuel increases, the need for engines capable of running on various mixtures of biodiesel fuel will be required. Similar to flex-fuel ethanol vehicles, control systems for the diesel engine and aftertreatment systems will need to detect and compensate for the fuel type. In this work, a soy based B100 biodiesel fuel and an ultra low sulfur diesel fuel were tested in a high-speed direct-injection high pressure common rail four-cylinder 1.9 L diesel engine. An internally developed engine control strategy allowed real-time calibration and testing of independent control parameters including start of injection, injection duration, injection pressure, and exhaust gas recirculation (EGR) level. Both the fuels were studied under varied injection timing (0°BTDC to 12°BTDC with increments of 3°) and EGR percentages of 0 and 10%. Analysis was performed to determine the Torque, BSFC and Brake thermal efficiency.
    Źródło:
    Journal of KONES; 2008, 15, 3; 327-334
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application and comparison of soy based biodiesel fuel to ultra low sulfur diesel fuel in a HPCR diesel engine - Part II: combustion and emissions
    Autorzy:
    Mathur, V. K.
    Moscherosch, B. W.
    Polonowski, C. J.
    Naber, J. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/244859.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    biodiesel
    combustion
    EGR
    injection timing
    emissions
    Opis:
    Biofuels have the potential to diversify transportation energy sources and reduce dependence on petroleum based fuels. Of these biofuels, Methyl-ester biodiesel holds significant potential as it has many characteristics similar to petroleum based diesel and can be blended with petroleum. However, biodiesel's differences in viscosity, specific energy, oxygen content, and cetane number can cause significant changes in engine performance and emissions. Therefore, it is of prime interest to understand the combustion behaviour of biodiesel and identify key factors that contribute changes in engine performance and emissions. In this study, a 100% biodiesel fuel derived from soy and an ultra low sulphur diesel fuel were tested in a high-speed direct-injection high pressure common rail four-cylinder 1.9L diesel engine. The engine control strategy allowed real time calibration and testing of independent control parameters including start of injection, injection duration, injection pressure, and exhaust gas recirculation (EGR) level. The engine was equipped with in-cylinder pressure transducers for combustion analysis. Instrumentation for gaseous emissions detection and carbaceous particulate matter (PM) sampling was also utilized. Both the fuels were studied under varied injection timing of 0centigrade BTDC to 12 centigrade BTDC in increments of 3 centigrade, EGR percentages of 0 and 10%, and injection pressures of 400 to 900 bar. Analysis was performed to determine the rate of heat release, ignition delay, NOX and PM emissions.
    Źródło:
    Journal of KONES; 2008, 15, 4; 311-320
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results of the research on the adaptive control of the injection timing in the diesel engine
    Autorzy:
    Poleszak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/243911.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    combustion engines
    adaptive control
    injection timing
    crankshaft torsion
    Opis:
    The basic aim in controlling the diesel engine is to obtain a maximal effective torque for a given fuel dose with keeping at minimum toxic exhaust compounds. This postulate can be realized by matching the appropriate fuel injection timing. In this paper the research results of the control system are presented, which allow for the constant matching of the injection advance in the CI engine to the varying characteristics of the controlled object, that is the engine. Quality factor of the working process which is defined as an effective engine torque, is estimated on the base of the instantaneous crankshaft torsion measurement. This concept, unlike the currently used systems, suggest the use of efficient torque (Me) measurement to generate control quantities, which control the work process of an engine. Realization of such measurements leads to the treatment of the control system as an extreme control unit (maximizing quantitative parameters) as well as an adaptive control system (possibility of unit's reaction on high changes of the parameters influencing the work process of an engine). Combining the idea of the crankshaft torsion measurement with the idea of extreme control, a system can be designed, which makes use of torsion measurement for the adaptive control of the injection timing. The object of the research was a Diesel engine ISUZU Y17DT with electronically controlled injection pump and engine diagnostic system. Realization of the research aim required design and construction of the measurement system of the crankshaft torsion.
    Źródło:
    Journal of KONES; 2008, 15, 2; 385-392
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combustion control in gasoline HCCI engine with direct fuel injection and exhaust gas trapping
    Autorzy:
    Hunicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/246912.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    homogeneous charge compression ignition
    variable valve timing
    negative valve overlap
    gasoline
    direct injection
    Opis:
    Homogeneous charge compression ignition (HCCI) seems to be the most promising solution for gasoline engines in the light of future emissions regulations. This novel combustion technique allows for significant reduction of fuel consumption and engine-out NOX emissions at low and medium engine load/speed conditions. High heat release rate enables realization of the Otto cycle close to ideal, increasing thermal efficiency. Among different approaches to invoke an auto-ignition of air-fuel mixture, exhaust gas trapping with the use of a negative valve overlap is under intensive investigations. The paper presents research results ofcontrolling an auto-ignition and combustion phasing in a single cylinder gasoline engine with direct fuel injection operated in the negative valve overlap mode. The experiments were performed at variable valvetrain settings, providing a control of EGR rate and volumetric efficiency. Additionally, the combustion process was investigated at variable air-fuel ratio. It was found that volumetric efficiency and EGR ratę are mainly dependent on exhaust valve timing, while a timing of intake valve determined combustion on-set and its duration. The effects of EGR rate and air-fuel ratio on combustion timing and exhaust gas emissions were isolated. The direct fuel injection showed its benefits versus mixture formation outside the cylinder. The application of variable injection timing provided additional possibility to control the combustion timing and exhaust emissions. However, it was found that the fuel injection strategy should be related to the engine load conditions.
    Źródło:
    Journal of KONES; 2010, 17, 2; 137-144
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CFD modelling of combustion in HCCI engine using avl fire software
    Autorzy:
    Jamrozik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/410680.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    spalanie
    zapłon
    czas zapłonu
    homogenous charge compression ignition
    exhaust gas recirculation (EGR)
    heat release rate
    start of the ignition
    burn duration
    injection timing
    conventional compression ignition engine
    indicated pressure
    nitric oxide
    Opis:
    HCCI (Homogenous Charge Compression Ignition) combustion system is now one of the most promising solutions used in piston engines. The paper presents the results of three-dimensional modeling of combustion in the single cylinder HCCI engine powered with Diesel fuel. 3D modeling was performed in AVL Fire code. The basic combustion parameters including start of the ignition (SOI), burn duration (BD), indicated pressure (pi) and nitric oxide (NO) and soot (Soot) emissions were analyzed. The modeling results show that combustion process in HCCI engine compared to a conventional engine with compression ignition is characterized by an earlier ignition (SOI) and shorter burn duration (BD). The impossibility of controlling HCCI combustion process leads to deterioration of engine performance and increased emissions of harmful exhaust gas components. Calculations showed that for the same equivalence ratio of burn mixture, uncontrolled HCCI combustion compared to a controlled combustion in engine with fuel injection operated is characterized by higher NO emission and reduced Soot emission.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2012, 1, 1; 51-55
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ kąta wyprzedzenia wtrysku na emisję toksycznych składników spalin silnika z zapłonem samoczynnym
    Influence of fuel injection timing on the exhaust toxicity Diesel engine
    Autorzy:
    Kowalek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/310916.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    silnik spalinowy
    kąt wyprzedzenia wtrysku
    biodiesel
    toksyczne składniki spalin
    fuel injection timing
    diesel engine
    Opis:
    W artykule przedstawiono analizę wpływu kąta wyprzedzenia wtrysku na emisję toksycznych składników spalin silnika z zapłonem samoczynnym. Badania eksperymentalne zostały przeprowadzone na silniku Star 359 zasilanym biodiesel (B20), przy różnych wartościach kąta wyprzedzenia wtrysku. W wyniku badań doświadczalnych zostały sporządzone charakterystyki przedstawiające emisję toksycznych składników spalin przez silnik z zapłonem samoczynnym.
    Influence of fuel injection timing on the exhaust toxicity Diesel engine. Experimental tests were conducted on a Star 359 engine fuelled with biodiesel at different fuel injection timing values. As a result of engine test bench testing, the characteristic curves of toxic exhaust gas component emissions were made, being analyzed next.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 8; 106-107
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wybranych parametrów roboczych silnika o zapłonie samoczynnym na wskaźniki pracy silnika
    Influence of selected compression : ignition engine operating parameters on the engine works
    Autorzy:
    Kowalek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/309815.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    silnik spalinowy
    ciśnienie wtrysku paliwa
    kąt wyprzedzenia wtrysku
    biodiesel
    fuel injection pressure
    fuel injection timing
    diesel engine
    Opis:
    W artykule przedstawiono analizę wpływu dwóch wybranych parametrów roboczych pracy silnika, (ciśnienie wtrysku paliwa oraz kąt wyprzedzenia wtrysku) na wskaźniki pracy silnika z zapłonem samoczynnym. Badania eksperymentalne zostały przeprowadzone na silniku Star 359 zasilanym biodiesel (B20), przy różnych wartościach ciśnienia wtrysku paliwa oraz różnych wartościach kąta wyprzedzenia wtrysku. W wyniku badań doświadczalnych zostały wykonane charakterystyki prędkościowe silnika, które następnie poddano analizie.
    This paper presents an analysis of the effect of two selected engine operating parameters (fuel injection pressure and fuel injection timing) on the engine works. Experimental tests were conducted on a Star 359 engine fuelled with biodiesel at different fuel injection pressure values and at different fuel injection timing values. Results engine test has been made speed external and it has been analyzed.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 8; 108-111
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the injection timing on the performance of two-stroke opposed-piston diesel engine
    Autorzy:
    Karpiński, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/117835.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    diesel engine
    opposed piston engines
    two-stroke engine
    injection timing
    silnik wysokoprężny
    przeciwstawne silniki tłokowe
    silnik dwusuwowy
    czas wtrysku
    Opis:
    The performance of the engine strongly depends on the parameters of the combustion process. In compression ignition engines, the fuel injection timing has a significant influence on this process. The moment of its occurrence and its duration should be chosen so that the maximum pressure value occurs several degrees after TDC. In order to analyze the effect of the fuel injection timing on the performance of the tested two-stroke opposed-piston diesel engine, a zero-dimensional model was developed in the AVL BOOST program. Next, a series of simulations were performed based on the defined calculation points for maximum continuous power, which resulted in power, specific fuel consumption and mean in-cylinder pressure. Finally, the engine map was made as a function of the start of combustion angle.
    Źródło:
    Applied Computer Science; 2018, 14, 2; 69-81
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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