Temat: dual fuel compression ignition engine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

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

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Skocz do pozycji: 4.

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

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Skocz do pozycji: 5.

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

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