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    Tytuł:
    Analysis of combustion process in a dual-fuel compression ignition engine fuelled with LPG in the liquid phase
    Autorzy:
    Luft, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/246428.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dual-fuel compression ignition engine
    LPG
    Opis:
    Investigation on fuelling a dual-fuel compression ignition engine with various fuels, that are unconventional for this type of engine, was carried out for many years in the Department of Internal Combustion Engines and Automobiles in Technical University of Radom. Such fuels as methanol, ethanol and natural gas were applied in the investigation. Recently, the investigation regards application of LPG - a fuel that is very popular in Poland. Within the project No. 4T12D02226 of the Committee of Scientific Research, it was tested, among others, an engine equipped with injection system for diesel fuel pilot dose - a common rail type. As a result of the former investigation, load characteristics of specific energy consumption as well as CO, CO2, nox, HC and smoke emissions data were obtained [1]. In order to analyze variability of fundamental combustion process parameters, histories of the pressure inside combustion chamber have been registered during investigation. Investigation on changes of these parameters in the described engine version is particularly important due to possibility of knocking combustion occurrence that leads to the failure of such engine parts as piston or valves. Changes of these parameters versus engine load for various injection timing of diesel fuel pilot dose were analysed.
    Źródło:
    Journal of KONES; 2007, 14, 3; 355-362
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental tests on a dual fuel compression-ignition engine powered by biogas with a varying chemical composition
    Autorzy:
    Wierzbicki, S.
    Śmieja, M.
    Kozłowski, M.
    Nieoczym, A.
    Krzysiak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/247546.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    biogas
    dual fuel compression-ignition engine
    emission of toxic compounds
    Opis:
    Biogas is among the fuels whose significance in the general energy balance will increase. These results from the fact that it may be produced from various kinds of waste materials, and it is therefore considered a renewable fuel of the second generation. Because of its properties, biogas may be used directly to power spark-ignition engines. Nonetheless, numerous tests are underway involving the possibility of using biogas to power compression-ignition engines. In order to use biogas, whose main combustible component is methane, in compression-ignition engines, it is necessary to use a dual fuel power supply system. With such a system supplying power to the engine, the gas and air mixture in the cylinder is ignited by a small dose of liquid fuel. This paper presents a fragment of the research on the use of biogas with a varying chemical composition for powering compression-ignition engines. The described tests were conducted using a one-cylinder compressionignition engine mounted on an engine test stand. The fuel gas consisted of a mixture of natural gas and carbon dioxide; the share of each individual component was regulated from the station, which controlled the operation of the whole test stand. The developed control system also enabled the adjustment of the operating parameters of the engine test stand and the parameters of the injection of liquid fuel, such as the injection pressure, the timing angle of injection and the size of the dose. The results presented in the paper show the impact of the individual control parameters of the engine on the value of the engine’s torque and the amount of toxic compounds in the exhaust fumes.
    Źródło:
    Journal of KONES; 2016, 23, 3; 549-554
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of the share of CNG on the combustion process in a dual-fuel compression-ignition engine with the common rail system
    Autorzy:
    Wierzbicki, S.
    Śmieja, M.
    Mikulski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/242699.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    natural gas
    dual-fuel compression-ignition engine
    Common Rail system
    combustion process
    Opis:
    The struggle against global warming necessitates the search for new sources of energy, which limit the emission of carbon dioxide into the atmosphere. Among various fuels used to supply energy nowadays, the importance of natural gas is constantly growing. This is caused by the fact that this fuel is characterised by the lowest share of coal among all fossil fuels. Because of its properties, natural gas can be used directly to power spark-ignition engines. The use of this fuel for compression-ignition engines on the other hand is limited due to the high autoignition temperature of methane. Currently, research is being conducted in numerous centres on the possibility of using fuel gases to power CI engines operating in a dual-fuel system. The present article discusses the impact of the share of CNG in the supply dose on the operation of a CI engine. An engine with the Common Rail injection system programmed for mono-fuel operation was used in the research. Based on the conducted tests it has been proved that supplying this type of engine with fuel gas considerably changes the course of the combustion process, which is caused by the fact that the gas and air mixture present in the combustion chamber starts burning now of the autoignition of the first portion of liquid fuel. The obtained test results confirm the necessity to change the injection parameters of the pilot dose of diesel fuel (the timing angle of injection and the pressure of fuel) in cases when this type of engine operates in a dual-fuel system.
    Źródło:
    Journal of KONES; 2016, 23, 2; 415-422
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of performances of a dual-fuel turbocharged compression ignition engine
    Autorzy:
    Różycki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/247435.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dual fuel compression ignition engine
    knock
    engine head vibration amplitude
    compressed natural gas (CNG)
    common rail
    Opis:
    The paper describes research work on a full-scale dual-fuel 4-cylinder turbocharged compression ignition engine. Compressed natural gas (CNG) was applied as the main fuel. Selfignition of the air-fuel mixture was initiated from a diesel oil dose injected by a common rail system. The research was aimed to establish maximum CNG share in the mixture delivered into the cylinder. An excessive CNG share may result in "hard" engine operation. It may also lead to the occurrence of vibrations of piston-crank construction parts resulting in failure of this mechanism. These vibrations may originate from knocking combustion (selfignition of the air-fuel mixture in the zone of non-combusted mixture) or vibration excitation as a result of rapid pressure rise after selfignition. Boundary values of the CNG energy share were determined by analysing parameters related to the rate of pressure rise and rate of heat release as well as the engine head vibration amplitude represented by the voltage signal generated by the knock sensor. Boundary values of the above mentioned parameters were determined on the basis of measurements done on the engine fuelled in a standard mode. These parameters were registered at operating points corresponding to the maximum power and load. Then, there were done measurements of basic engine operating parameters at dual fuelling in chosen points of the load characteristic for the engine speed at which the engine fuelled in a standard mode had maximum torque. Load characteristics were done for three various diesel oil doses (constant over the whole range of engine load). Load changes were realized by changes ofCNG energy share in the fuel charge. Analysis of combustion process parameters and engine head vibrations showed that CNG energy share may reach 60%. Maximum torque is possible to obtain at 45% CNG energy share. 15% decrease of maximum torque was obtained.
    Źródło:
    Journal of KONES; 2010, 17, 3; 393-399
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Knock combustion in dual fuel turbocharged compression ignition engines
    Spalanie stukowe w turbodoładowanym dwupaliwowym silniku o zapłonie samoczynnym
    Autorzy:
    Róźycki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/245368.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    spalanie stukowe
    dwupaliwowy silnik o zapłonie samoczynnym
    amplituda drgań głowicy
    sprężony gaz ziemny
    knocking combustion
    gaseous fuel
    dual-fuel compression ignition engine
    cylinder head vibrations
    Opis:
    The paper describes some results of examination of dual fuel turbocharged compression ignition engine, which verify possibility of occurring of knock combustion. The first stage of examination was done with the use of standard fuel system. Dual fuel system was used in the second stage. Diesel provided by common rail system was used for ignition of natural gas, which was treated as a main fuel. The fluctuation of the cylinder pressure and engine head vibration was registered for characteristic points of engine run (maximum torque, maximum power, maximum engine efficiency). The spectrum of vibration of engine head was analyzed. Analysis is based on application of Fast Fourier Transform for calculation of characteristic frequency and maximum values of module of transform. Moreover the factors of knock intensity were calculated. The results ofanalysis confirmed previous results which shown that during combustion in CI engine fluctuation of pressure appear. The fluctuation cause vibration of engine head but frequency of the vibration is characteristic for knock combustion. Characteristic frequency doesn 't depend on gas fuel rate in total fuel, which is provided to the cylinder. The magnitude, which changes is maximum of amplitude of vibration. The results of calculation of knock combustion intensity factor, which is based on maximum of amplitude of engine head vibration shown its suitability for identification of knock combustion.
    W artykule opisano wyniki badań weryfikujących możliwość wystąpienia spalania stukowego Drży dwupaliwowym zasilaniu pelnogabarytowego turbodoładowanego silnika o ZS. Pierwszy etap badań przeprowadzony był przy standardowym zasilaniu silnika. W drugim etapie badań silnik zasilany był układem dwupaliwowym. Paliwem inicjującym samozapłon ładunku był olej napędowy podawany przez układ common rail. Paliwem podstawowym był gaz ziemny (CNG). Rejestrowane były zmiany ciśnienia w cylindrze i drgania głowicy w charakterystycznych punktach pracy silnika (maksymalny moment, maksymalna moc i maksymalna sprawność silnika). Analizie poddano widma drgań głowicy w okresie spalania. Analiza polegała na zastosowaniu szybkiej transformaty Fouriera do obliczenia charakterystycznych częstotliwości i wartości maksymalnych modułu transformaty. Ponadto wykonano obliczenia wskaźników intensywności stuku. Wyniki analiz potwierdziły wcześniejsze badania, z których wynikało, że w silniku o zapłonie samoczynnym w okresie spalania występują pulsacje ciśnienia wywołujące drgania głowicy o częstotliwości charakterystycznej dla spalania stukowego. Częstotliwość ta występuje niezależnie od udziału paliwa gazowego w ładunku dostarczanym do cylindra. Wielkością, która ulega zmianie jest maksymalna amplituda pulsacji. Wyniki obliczenia wskaźnika intensywności spalania stukowego opartego na maksymalnej amplitudzie drgań głowicy wykazały jego przydatność do identyfikacji spalania stukowego.
    Źródło:
    Journal of KONES; 2009, 16, 4; 393-400
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of CO2 content in CNG on the combustion process in a dual-fuel compression ignition engine
    Wpływ zawartości CO2 w CNG na przebieg spalania w dwupaliwowym silniku o zapłonie samoczynnym
    Autorzy:
    Wierzbicki, S.
    Mikulski, M.
    Śmieja, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/133672.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    dual-fuel compression ignition engine
    carbon dioxide
    combustion process
    emission of toxic compounds
    dwupaliwowy silnik o ZS
    CNG
    dwutlenek węgla
    proces spalania
    emisja związków toksycznych
    Opis:
    Seeking alternative sources of energy for its more effective use, reducing emissions of toxic pollutants to the atmosphere and counteracting global warming are nowadays the major areas of development in the power industry, including the design of combustion engines. Currently, the research into the use of new fuels, which may be effective sources of energy, is performed by many scientific centres. The use of biogas for production of energy in cogeneration systems is one of the ways for improvement of energy balance. In the research described herein, a dual-fuel compression ignition engine was fuelled with gaseous fuel with variable CNG and CO2 ratios. The tests were performed for engine fuelling controlled by both an original controller with the software optimised for single-fuel operation and for the injection of a pilot dose of diesel controlled by a dedicated controller enabling the adjustment and control of the injection and dose parameters. This paper presents the effect of carbon dioxide content in gaseous fuel on the combustion process and emission of toxic compounds in the engine examined.
    Poszukiwanie alternatywnych źródeł energii, zwiększenie efektywności jej wykorzystania, a także zmniejszenie emisji związków toksycznych do atmosfery i walka z globalnym ociepleniem są głównymi współczesnymi kierunkami rozwoju przemysłu energetycznego, w tym również silników spalinowych. Obecnie w wielu ośrodkach naukowych prowadzone są badania nad wykorzystaniem nowych paliw, które mogą być efektywnym źródłem energii. Jednym ze sposobów poprawy bilansu energetycznego jest wykorzystanie biogazu do wytwarzania energii w układach kogeneracyjnych. W opisanych w artykule badaniach dwupaliwowy silnik o zapłonie samoczynnym zasilany był paliwem gazowym o zmiennych proporcjach CNG i dwutlenku węgla. Badania przeprowadzono przy sterowaniu zasilaniem silnika zarówno przez oryginalny sterownik oprogramowany do pracy jednopaliwowej, jak i przy sterowaniu wtryskiem dawki pilotującej oleju napędowego przez dedykowany sterownik umożliwiający regulację i kontrolę parametrów wtrysku tej dawki. W artykule przedstawiono wpływ zawartości dwutlenku węgla w paliwie gazowym na przebieg procesu spalania oraz emisję związków toksycznych badanego silnika.
    Źródło:
    Combustion Engines; 2015, 54, 3; 91-101
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the influence and the methodology of the calibration process for Diesel-LPG dual fuel supply systems
    Autorzy:
    Jarzyński, W.
    Kneba, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/133359.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    compression-ignition engine
    dual fuel supply
    LPG
    calibration
    silnik o zapłonie samoczynnym
    kalibracja
    Opis:
    The paper raises the problem of the lack of a methodology for how to calibrate the Diesel-LPG dual fuel system in the literature and the lack of information about the impact of calibration method on reducing the amount of consumed Diesel. Its purpose is to study such a system in which a part of Diesel is replaced by a mixture of propane and butane and to establish methodology of choosing the calibration parameters to ensure the maximum reduction in the amount of burned Diesel while keeping the engine durability. The results of the research done on the road and chassis dynamometer, carried on the van type vehicle, allow to conclude that the reduction in the amount of consumed Diesel may vary by up to 25% between different calibration methods.
    Źródło:
    Combustion Engines; 2015, 54, 3; 649-657
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ECU calibration for gaseous dual fuel supply system in compression ignition engines
    Autorzy:
    Stepanenko, Denys
    Kneba, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/2097470.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    compression ignition engine
    ECU calibration
    dual fuel mode
    alternative fuels
    emission reduction
    silnik o zapłonie samoczynnym
    kalibracja ECU
    tryb dwupaliwowy
    paliwa alternatywne
    ograniczenie emisji
    Opis:
    The dual fuel (DF) combustion mode is proven solution that allows to improve or get at the same level engine performance and reduce toxic compounds in exhaust gases which is confirmed by researchers and end-users. DF combustion mode uses two fuels gaseous fuel as a primary energy source and a pilot quantity of diesel fuel as ignition source. However, in order, to fully take advantage of the potential of the dual fuel mode, DF system must be proper calibrated. Despite the existence of commercial control systems for dual fuel engines on the market, the literature on the important parameters for the engine's operation introduced during calibration is scarce. This article briefly describes a concept of working algorithm and calibration strategy of a dual fuel electronic control unit (ECU) The purpose of calibration is to achieve the greatest possible use of an alternative gaseous fuel without causing accelerated engine wear.
    Źródło:
    Combustion Engines; 2020, 59, 3; 33--37
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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