Temat: spark-ignition engines - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dedicated exhaust gas recirculation in spark ignition engines
Autorzy:: Rehan, S.
Powiązania:: https://bibliotekanauki.pl/articles/103305.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: exhaust gas recirculation
NOx emissions
spark ignition engines
Opis:: The impact of high levels of exhaust gas recirculation (EGR) has been well documented to decrease fuel consumption and reduce emissions of spark ignition engines. But there are also many limitations associated with this technology like EGR control and tolerance, which can reduce the potential efficiency improvements. A new concept called D-EGR has been presented in which the exhaust from a sub group of power cylinders is channeled back to the intake of all the cylinders. In this literature review both experimental and numerical analysis of this technology is shown. In the former case experiments were performed on 2.0 L PFI engine with gasoline as a fuel in part and high load conditions and the results show that at part loads the D-EGR engine can lead to lower Brake Specific Fuel Consumption, lower HC and CO emissions and higher brake thermal efficiency. At high load operations the results show improved combustion stability and superior knock tolerance. In the numerical studies it shows comparable thermal efficiency with conventional spark ignition (SI) engines and reduction in NOX emissions.
Źródło:: Advances in Science and Technology. Research Journal; 2017, 11, 2; 44-50
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Reduction of carbon footprint from spark ignition power facilities by the dual approach
Autorzy:: Janusz-Szymańska, Katarzyna
Grzywnowicz, Krzysztof
Wiciak, Grzegorz
Remiorz, Leszek
Powiązania:: https://bibliotekanauki.pl/articles/1845486.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: spark ignition engines
digestion
gas
cofiring
CO2 emissions
membrane
separation
Opis:: Power generation units, suitable for individual users and small scale applications, are mainly based on spark ignition engines. In recently performed research, reductions of emissions coming from such units, especially considering carbon dioxide emissions, are deemed as the issue of particular importance. One of solutions, postponed to reduce impact of spark ignition engine-based units on the natural environment, is transition from fossil fuels into renewable gaseous fuels, as products of organic digestion. Nonetheless, development of new solutions is required to prevent further carbon dioxide emissions. The paper presents a novel dual approach developed to reduce carbon dioxide emissions from stationary power units, basing on spark ignition engine. The discussed approach includes both reduction in carbon content in the fuel, which is realized by its enrichment with hydrogen produced using the solar energy-supported electrolysis process, as well as application of post-combustion carbon dioxide separation. Results of the performed analysis suggest profitability of transition from fossil into the hydrogen-enriched fuel mixture, with significant rise in operational parameters of the system following increase in the hydrogen content. Nevertheless, utilization of the carbon dioxide separation leads to vital soar in internal energy demand, causing vital loss in operational and economical parameters of the analyzed system.
Źródło:: Archives of Thermodynamics; 2021, 42, 2; 171-192
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The environmental safety of the Fiat 0.9 TwinAir compressed natural gas engine
Autorzy:: Warianek, Michał G.
Lejda, Kazimierz
Powiązania:: https://bibliotekanauki.pl/articles/263728.pdf
Data publikacji:: 2020
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: spark ignition engines
gas engines
CNG engine
load characteristics
emission of gas engines
Opis:: The article presents the results of measurements of concentrations of selected exhaust components of the Fiat 0.9 TwinAir spark ignition engine operating according to load characteristics. The tested engine has an indirect, multi-point petrol supply system and has been retrofitted with an indirect CNG injection system. The results of the tests are a comparison of selected economic, ecological and energetic indicators of engine operation obtained when fuelled with CNG and 95 octane petrol. The operation of the engine fuelled with gaseous fuel was preceded by autocalibration of the controller of the fuelling system. The article presents the results of tests of concentrations of harmful components of exhaust gases: carbon dioxide CO2 , carbon monoxide CO, nitrogen oxides NOx and HC hydrocarbons. Moreover, the values of lambda λ air excess coefficient are presented and fuel consumption is compared. The obtained results of the tests of the engine fuelled with CNG gas show a significant decrease in the value of the obtained torque in comparison to the engine torque when fuelled with petrol. The engine fuelled with compressed natural gas contributed to the improvement of its ecological properties and a reduction of fuel consumption, which are important factors of ecological and energy safety. Exhaust gas analysis showed a reduction in the concentration of harmful components of exhaust gases, mainly hydrocarbons and nitrogen oxides. A positive effect of the operation of the engine powered by CNG was also a significant reduction of carbon dioxide in the exhaust gases compared to the engine powered with gasoline.
Źródło:: Archiwum Motoryzacji; 2020, 88, 2; 47-60
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Combustion process visualisation in rapid compression machine modelling combustion in spark ignition engines
Autorzy:: Leżański, T.
Sęczyk, J.
Wolański, P.
Powiązania:: https://bibliotekanauki.pl/articles/245855.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: internal combustion engines
spark ignition engines
combustion process
combustion process control
visualization of combustion process
Opis:: Mixture preparation and combustion processes in internal combustion engines are very complex and very difficult to investigate. These processes run very quickly and their parameters are changed quickly and in wide ranges. Therefore, the interpretation of measurement results is very difficult and uncertain. The visualization methods applied in the combustion researches can help to interpret the results. For many years, the visualization methods have been developed at the Aircraft Engine Department of Heat Engineering Institute of Warsaw University of Technology, in the field of combustion in engines, detonation and gas dynamics research. In these researches, different method of registration of very fast changes of combustion were applied. The combustion experiments have been performed in constant volume bomb, rapid compression machines and experimental visualisation engines. In the last case, the electronic digital camera of Photram SA 1.3 has been used. This paper refers to the experiments, which were conducted using rapid compression machine. Their goal was explanation the combustion mechanism in combustion system with semi-open combustion chamber under different parameters of this system. The obtained results show a strong influence of combustion system parameters on combustion mechanism, especially on a compression ratio and ignition timing. The strong swirls were registered at all sharp edges on combustion chamber during compression stroke. These swirls had a strong influence on the combustion system operation.
Źródło:: Journal of KONES; 2013, 20, 4; 219-226
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Control strategy combustion of system with semi – open combustion chamber of spark ignition engines
Autorzy:: Leżański, T.
Sęczyk, J.
Wolański, P.
Powiązania:: https://bibliotekanauki.pl/articles/241853.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
spark ignition engines
combustion processes
new combustion system
new strategy of combustion control
Opis:: The attempts to increase the engine combustion efficiency of the spark ignition (SI) engines have led to development of the new combustion system with semi-open combustion chamber. This system is similar to flame jet ignition systems, which were applied in many production internal combustion engines. The similar pulsed jet combustion system was elaborated by Professor A. K. Oppenheim. In the system developed at Aircraft Engine Department of Warsaw University of Technology (AED) the standard combustion chamber of SI engine was divided on prechamber and main combustion chamber using partition. The ignition in prechamber is more reliable and repeatable but total burning time in the prechamber and main combustion chamber is shorter than in standard combustion chamber. The principal problem of efficient operation of this system and obtaining of the required performance is securing the relevant control strategy. The performances of this system are dependent from: the rate of this prechamber volume to total combustion chamber volume, the orifice diameter in a partition, the ignition place and the ignition advance angle (ignition timing). Among these parameters the ignition timing only may be varied in the continuous manner during the engine operations without of the engine disassembling. Therefore constant values separate parameters (prechamber volume, orifice diameter, ignition place) should be selected in comprehensive, time consuming researches for different engine operation conditions (engine speed, load and environment conditions) and subsequently the map of ignition advance angles should be determined at state remaining separate parameters. The values of the ignition advance angle should be selected and programmed in electronic control unit, which will be control the ignition advance angle at different engine operating conditions. The dependences between engine operating parameters and the ignition timing are not linear and therefore mechanical control system is not effective. Some research results concerning the best engine operating parameters has been presented in this paper.
Źródło:: Journal of KONES; 2012, 19, 4; 367-377
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Silnik plazmatronowy
Plasmatron spark ignition engines
Autorzy:: Mysłowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/316666.pdf
Data publikacji:: 2012
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: silnik plazmatronowy
charakterystyki zewnętrzne
symulacja komputerowa
plasmatron spark ignition engines
external characteristics
computer simulation
Opis:: W pracy przedstawiono charakterystyki zewnętrzne dwóch silników wykonanych w kraju, wyposażonych w urządzenie plazmatronowe. Charakterystyki wykonano na drodze symulacji komputerowej.
In the work are the external characteristics two engines made in the country, the equipped in the device plazmatron. The characteristics was performed by computer simulation.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2012, 13, 5; 345-348
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The evaluation of the Fiat 0.9 TwinAir engine powered by petrol and LPG gas work cycles uniqueness
Autorzy:: Lejda, K.
Kurczyński, D.
Łagowski, P.
Warianek, M.
Dąbrowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/245074.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: spark ignition engines
gas engines
gasoline engines
uniqueness of work cycle of internal combustion engine
indicator diagram
Opis:: The article describes the test results of the uniqueness of the work cycle of two-cylinder internal combustion piston FIAT 0.9 TwinAir engine, while being powered by 95 octane petrol fuel and LPG gas. The engine was working according to load characteristics. The engine mounted on the test bench was equipped with a sequential LPG gas fuel supply system. The gas fuels differ significantly from the petrol fuels in their physiochemical properties. In order to rationally utilize gas fuels to power internal combustion engines, the knowledge about basic fuel burning process of these fuels is required. The article shows the analysis of individual engine work cycles of the technologically advanced engine in order to evaluate the influence of powering by LPG gas fuel on the rate of uniqueness of its work cycles. The measure of uniqueness of the inter-cylinder processes are the work cycle uniqueness indicators, which are as follows: the maximum work cycle pressure uniqueness indicator, the average measured work cycle pressure uniqueness indicator, the measured pressure work cycle graph uniqueness indicator and the measured pressure work cycle partial graph uniqueness. The carried out research and its analysis has shown that powering the engine with LPG gas has an influence on the engine work cycles and its uniqueness. The burning process of the mixture consisting of air and LPG gas is quicker, which has an effect on the higher speed of pressure increase rate in comparison with the engine being powered by petrol fuel. Achieved maximum in-cylinder pressure values while the engine was powered by LPG gas were higher in comparison with it being fuelled with conventional fuel. This causes an increase of the gas lads on crank-piston system, which are influencing directly the piston with higher heat load, and the thermal load of the engine.
Źródło:: Journal of KONES; 2018, 25, 3; 323-330
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Analiza sygnału drgań silnika o zapłonie iskrowym w warunkach drogowych
Analysis of vibration signal of SI engine during the road test
Autorzy:: Komorska, I.
Powiązania:: https://bibliotekanauki.pl/articles/262841.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: analiza
drgania
silnik o zapłonie iskrowym
sygnał wibroakustyczny
analysis
spark ignition engines
vibration
vibroacoustic signal
Opis:: Sygnał wibroakustyczny silnika spalinowego jest obecnie wykorzystywany do oceny spalania w silnikach o zapłonie iskrowym. Tymczasem jest on bogatym źródłem wiedzy nie tylko o procesie spalania, lecz również świadczy o różnych uszkodzeniach mechanicznych mających miejsce w zespole napadowym, dotyczących zaworów, sprzęgła, skrzyni biegów. W artykule opisano badania wykonane na silniku spalinowym o zapłonie iskrowym, obejmujące pomiar drgań bloku silnika oraz pomiary dodatkowych sygnałów z czujników, umożliwiające ustalenie parametrów pracy silnika i faz rozrządu. Badania wykonano podczas testów drogowych, a ich celem było oszacowanie wpływu prędkości obrotowej, obciążenia i warunków nawierzchni drogowej na drgania bloku silnika. Sygnał poddano przetworzeniu metodą filtracji, analizy widmowej oraz krótkookresowej transformaty Fouriera. Wykonane pomiary są podstawą opracowania wibroakustycznego modelu diagnostycznego służącego do oceny stanu elementów mechanicznych silnika, tj. zaworów, tłoków itp.
The vibroacoustic signal is used currently in engine diagnostics only to evaluate knock combustion in spark ignition engines. Meanwhile it is a rich source of knowledge not only about the process of combustion, but also about various mechanical defects which happen in driving unit and which concern valves, clutch and gearbox. The paper describes measurements of vibration and additional signals from engine sensors that enable evaluation of work parameters and engine timing control. Investigations were conducted on the road and their purpose was evaluation of influence of rotational speed, load and road surface on engine vibration. The vibration signal was filtered and analyzed with Fourier transform and short-time Fourier transform. Conducted measurements are the base of vibroacoustic diagnostic model that should be worked out for detecting of mechanical defects of valves, pistons etc. in a reciprocating engine.
Źródło:: Archiwum Motoryzacji; 2009, 3; 181-190
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Wielokierunkowe badania wpływu paliw wysoko-etanolowych na tworzenie osadów w silnikach z zapłonem iskrowym
Multidirectional investigations of high-ethanol fuels on deposit formation in spark ignition engines
Autorzy:: Stępień, Z.
Powiązania:: https://bibliotekanauki.pl/articles/133087.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: paliwa wysoko-etanolowe
osady
silniki z zapłonem iskrowym
high-ethanol fuels
deposits
spark ignition engines
Opis:: W artykule opisano właściwości użytkowe i problemy eksploatacyjne paliw stanowiących wysoko-etanolowe mieszaniny z benzyną. Przedstawiono silnikowe stanowisko badawcze i własną metodę badań wpływu mieszanin etanolu z benzyną na osady na zaworach dolotowych w komorach spalania i inne. Omówiono wyniki badań tendencji do tworzenia szkodliwych osadów na elementach układu dolotowego silnika flex fuel w zależności od składu paliwa, jego uszlachetniania, konstrukcji silnika i warunków jego eksploatacji. Wykazano ogromne znaczenie nowoczesnych dodatków detergentowych specjalnie opracowanych i kompatybilnych z paliwami o wysokiej zawartości etanolu w kontroli i przeciwdziałaniu tworzeniu się osadów w silniku.
This paper describes performance and operational issues of a high ethanol and gasoline fuel blends. Dynamometer engine test bench and special in-house test method for effect evaluation of ethanol and gasoline blends on intake valve deposits, combustion chamber deposits and other has been introduced. Investigation results of tendency for harmful deposit formation on various elements of flex fuel engine intake system resulting from the fuel composition, fuel treatment, engine construction and its operating parameters was reported. Great importance of modern deposit control additives specially formulated to be compatible with high ethanol fuels for providing control and counteracting deposit formation has been proved.
Źródło:: Combustion Engines; 2015, 54, 3; 608-618
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effects of combustion products composition models on the exergetic analysis of spark-ignition engine fuelled with ethanol
Autorzy:: Rufino, Caio H.
de Lima, Alessandro J. T. B.
Mattos, Ana P.
Allah, Fazal U. M.
Ferreir, Janito V.
Gallo, Waldyr L. R.
Powiązania:: https://bibliotekanauki.pl/articles/240380.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: engine simulation
combustion products
spark-ignition engines
ethanol
irreversibility
produkt
spalanie
etanol
nieodwracalność
silnik
zapłon iskrowy
Opis:: The engine simulations have become an integral part of engine design and development. They are based on approximations and assumptions. The precision of the results depends on the accuracy of these hypotheses. The simplified models of frozen composition, chemical equilibrium and chemical kinetics provide the compositions of combustion products for engine cycle simulations. This paper evaluates the effects of different operating conditions and hypotheses on the exergetic analysis of a spark-ignition engine. The Brazilian automotive market has the highest number of flex-fuel vehicles. Therefore, a flex-fuel engine is considered for simulations in order to demonstrate the effects of these different hypotheses. The stroke length and bore diameter have the same value of 80 mm. The in-cylinder irreversibility is calculated for each case at the closed part of the engine cycle. A comparative analysis of these hypotheses provides a comprehensive evaluation of their effects on exergetic analysis. Higher values of accumulated irreversibility are observed for the oversimplified hypothesis.
Źródło:: Archives of Thermodynamics; 2019, 40, 3; 27-42
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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