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Tytuł:
Dual fuelling CI engine with methanol and diesel oil
Autorzy:
Stelmasiak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/242614.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual fuel
alcohol
methanol
thermal efficiency
toxity
Opis:
Dual fuel compression ignition engine can be run on diverse fuels, both gaseous and liquid ones. Alternative fuels to the Diesel oil feature, as a rule, low cetane number and high temperature of self-ignition. Due to this, such fuels can not be ignited spontaneously and require ignition from small dose of the Diesel oil. In the dual fuel system, as the main fuel can be considered a liquid fuels, which can be supplied to the cylinder in form of vapours, or injected be to the suction manifold. Methyl and ethyl alcohols, or their esters, can be counted among future fuels. Such alcohols can be either the main fuels or small additions improving combustion of the Diesel oil. In the paper are presented test results of the SW 680 engine run on methanol and Diesel oil. Methanol was supplied to the suction manifold in form of methanol-air aerosol. Energetic fraction of the methanol amounted to 12-50%, depending on engine load. Performed tests have shown advantageous effect of the methanol on performance of the engine. One confirmed considerable growth of overall efficiency of the engine in area of higher loads (3-6%), reduction of smokiness of exhaust gases achieved as early as with small additives of the methanol (2-3 times), reduction of CO and CO2 emissions, reduction of exhaust gases temperature. Small addition of the methanol affects advantageously on combustion of the Diesel oil, shortening time if its combustion. Addition of the methanol enables maintaining effective power of the engine fuelled traditionally, and even its slight growth. Cost of adaptation to dual fuel supply with alcohol are low, and such type of fuelling can be easy implemented in already operated compression ignition engines.
Źródło:
Journal of KONES; 2013, 20, 3; 387-393
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study on in-cylinder blending by means of a simultaneous direct injection of two liquid fuels in a heavy duty compression ignition engine
Autorzy:
Kapusta, Ł. J.
Teodorczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/175277.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual fuel
injection
n-hexane
heavy duty engine
Opis:
Dual fuel combustion has been recently of high interest, mainly in terms of utilization of fuels different than diesel fuel in compression ignition engines. Depending on the properties of a fuel which is additional to diesel fuel, and the type of the additional fuel supply method the combustion process may be strongly modified comparing to single fuel combustion. Nowadays the modification of the combustion process becomes the reason for implementing the dual fuelling process. However, still the main reason for its implementation remains the utilization of nonconventional fuels in compression ignition engines. Among different types of dual fuel systems the one based on simultaneous direct injection of two fuels seems to be most flexible one. It allows to stratify the charge in the cylinder, blend two different fuels at any ratio and does not decrease volumetric efficiency. Therefore, this study aims at mixture formation in a heavy duty engine employing simultaneous direct injection of two different liquid fuels. Special attention was paid to spray breakup and simultaneous evaporation of two fuels which are the key processes in mixture formation.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2015, 128; 5-18
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CNG injector research for dual fuel engine
Autorzy:
Majczak, A.
Barański, G.
Siadkowska, K.
Sochaczewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/102178.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
CNG
diesel
gas flow
gas injector
dual fuel
Opis:
The article presents the tests results of the prototype design of hydraulically assisted injector that is designed for gas supply into diesel engines. The construction of the injector allows for its positioning in the glow plug socket, so that the gas is injected directly into the combustion chamber. The cycle analysis of the four-cylinder Andoria ADCR engine with a capacity of 2.6 dm3 for different crankshaft rotational speeds allowed to determine the necessary time for fuel injection. Because of that, it was possible to determine the required mass flow rate of the injector, for replacing as much of the original fuel by gaseous fuel. To ensure a high value of flow inside the injector, supply pressure equal to 1 MPa was applied. High gas supply pressure requires high value of valve opening forces. For this purpose a injector with hydraulic control system, using a liquid under pressure for the opening process was designed. On the basis of air pressure measurements in the flow line after the injector, the analysis of opening and closing of the valve was made. Measurements of outflow mass of the injector were also carried out. The results showed that the designed injector meets the requirements necessary to supply ADCR engine with CNG fuel.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 212-219
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exhaust emissions of dual fuel spark ignition engine fuelled gasoline and methanol
Autorzy:
Stelmasiak, Z.
Semikow, J.
Powiązania:
https://bibliotekanauki.pl/articles/247184.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
methanol
gasoline
spark ignition engine
dual fuel
exhaust emissions
Opis:
Today, more and more attention is paid to search for alternative fuels, which would be not only environmentally friendly, but also cost-competitive to petroleum fuels. In the recent years much attention is paid to investigations at adaptation of combustion engine to run on bio-fuels. Results of the investigations show, that methyl and ethyl alcohols could belong to one from the most promising and future bio-fuels, being a serious alternative to petroleum fuels. Interest in these fuels comprises such areas as exploration of raw materials to production of the alcohols, development of technology of their production, especially 2nd generation of ethyl alcohol, special fuelling and control systems, design changes of the engines fuelled with alcohols. In the present paper are shown test results of Fiat 1.3 Multipoint engine fuelled in dual fuel system with methanol and gasoline. In this engine one assembled prototype fuel supply system with duplex injectors on each cylinder, to injection of methanol and gasoline. Implemented system enables fuelling with gasoline only, with methanol only, or simultaneously with gasoline and methanol with any fraction of the methanol. Change of fuelling system and change of methanol fraction can be accomplished in course of engine operation. Performed investigations showed advantageous effect of the methanol on toxicity of exhaust gases. One confirmed reduction of emissions of hydrocarbons, nitrogen oxide and carbon dioxide. The biggest changes in the concentration occurred in case of fuelling with the methanol only, and amounted to: 2-3 times reduction of the THC, reduction of NOx with 40-60%. Differences in concentration of NOx increased together with growth of engine load, and hence, they concern such areas of engine operation, where the biggest quantities of the NOx are emitted. In case of dual fuel feeding, effect of reduction of concentration of the components discussed here decreases according to reduced fraction of the methanol. Changes in the emissions discussed here are obtained with maintained engine performance and growth of overall efficiency of the engine. Implemented system eliminates problems of stratification of methanol-gasoline mixture in low temperatures and in presence of water. The system can be adapted to any liquid fuels.
Źródło:
Journal of KONES; 2013, 20, 2; 363-370
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of reduction systems of harmful substances into the atmosphere in accordance to requirements of IMO Tier III
Autorzy:
Czmyr, Stanisław
Kaminski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/247763.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
NOx
SOx
MARPOL
atmosphere pollution
marine transportation
dual fuel
Opis:
Degradation of the environment is nowadays believed to be the most alarming problem that needs to be solved. Global warming and environmental pollution are predicted to cause a catastrophic chain reaction leading to species extinction, mass emigration due to rising sea levels and global crisis. The only solution suggested by international organizations is the immediate reduction of greenhouse gases and other harmful substances. Marine transportation harmful substances into the atmosphere are recognized to be a significant source of global atmospheric pollution. Despite the high efficiency of marine diesel engines, their impact on the environment is considerable. Due to environmentally friendly policies, modern engines concerns about not only efficiency but also mainly about s aspects. This article analyses and compares marine s exhaust gases reduction methods. Especially the most harmful substances emitted by ships were taken into consideration. The article presents the most crucial law regulations of harmful substances to the atmosphere, pointing at actual and possible future implementations. The most complex methods allowing meeting the latest limits were presented. Pros and cons of available control methods were thoroughly described and methods were compared. The most adequate methods form the effectiveness and economical point of view was pointed out.
Źródło:
Journal of KONES; 2019, 26, 3; 7-14
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the effect of diesel fuel injection parameters on the combustion process in the turbocharged CI engine operating on propane
Autorzy:
Skrzek, T.
Powiązania:
https://bibliotekanauki.pl/articles/243309.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
dual fuel
propane
control of injection parameters
Opis:
Results presented in the article regard the research on a turbocharged dual-fuel CI engine operating on propane. The research indicated that such engine might operate even if 70% of the standard fuel energy is replaced by propane. The research indicated that at such high share of the gaseous fuel, there is necessary to adjust diesel fuel injection parameters but it is important that there is no need to change the engine structure. Injection parameters may be adjusted in a wide range due to the modern fuelling system of the common rail type. The investigated engine was equipped with such system. Adjustments regarding the fuel charge division, fuel charge quantities, and injection timing enabled to influence combustion in such way to obtain its specific parameters, i.e. maximum combustion pressure, rate of pressure rise, maximum pressure, and the burn out ratio similar to those obtained for diesel fuel operation. The obtained results were presented in form of adjustment characteristics of the injection timing of diesel fuel pilot dose for a few chosen values of the boost pressure as well as injection timing of the main dose. The investigations were carried out for three values of the boost pressure, i.e. 200; 400 and 600 [mbar] but also for the naturally aspirated version. Injection timing of the first dose varied in a broad range and depended on the boost pressure. Injection timing of the second dose varied in a narrower range, mainly due to considerable changes in the combustion process. The obtained results answered a number of questions regarding the strategy of selection of diesel fuel injection parameters taking into consideration engine performances as well as combustion at a high share of the gaseous fuel.
Źródło:
Journal of KONES; 2018, 25, 3; 419-429
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Investigation on Indicated Pressure and Heat Release for Direct Hydrogen Injection in a Dual Fuel Diesel Engine
Autorzy:
Siadkowska, Ksenia
Barański, Grzegorz
Sochaczewski, Rafał
Wendeker, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2201773.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
diesel engine
direct hydrogen injection
dual fuel
combustion engine
Opis:
This paper presents the research results for a diesel and hydrogen fueled engine. The research object is a four-cylinder, four-stroke ADCR engine with a displacement of 2,636 cm3. In the experiments, glow plugs were replaced with compressed hydrogen injectors and a special adapter. Hydrogen was supplied directly into a combustion chamber using a test injector. A hydrogen dose in the tests was changed at selected test points and ranged from 0 to 160 dm3/min. The research were conducted at 1,500 rpm. A hydrogen injection start angle and maximum hydrogen dose were specified from the preliminary experiments. The following parameters were analyzed: indicated mean effective pressure, maximum pressure, crank angle of maximum cylinder pressure occurrence and heat release. The obtained results were statistically analyzed. The conducted analysis focused on determining whether there are significant differences between early and late injection and how these changes affect the measured parameters.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 54--66
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of addition of LPG and camelina oil esters on noise and vibration in a dual fuel CI engine
Wpływ dodatku LPG oraz estrów lniankowych na emisję hałasu i drgań w dwupaliwowym silniku o zapłonie samoczynnym
Autorzy:
Szczurowski, K.
Radkowski, S.
Walczak, D.
Zieliński, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/329674.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diesel
LPG
dual fuel
sound
vibration
silnik dwupaliwowy
hałas
drgania
Opis:
With the development of internal combustion engines, engineers attempt to reduce the noise and vibration generated. Due to the high cost of fuel, are increasingly looking for new sources of power in order to reduce costs. In diesel engines, an increasingly popular method is the admixture of propane-butane. This follows because of the price of the fuel as well as to improve the efficiency of combustion. With the development of this type of dual fuel power seems to be a reasonable study of the effects of LPG to generate noise and vibration, as well as an attempt to evaluate the combustion process. The article describes preliminary studies on these phenomena example Yanmar L70 with a modified injection system of diesel and LPG in the gaseous phase. The paper presents the results of noise and vibration of dual fule engine using different shares of LPG and camelina oil esters.
Wraz z rozwojem silników spalinowych, inżynierowie podejmują próby redukcji emitowanego hałasu i generowanych drgań. Ze względu na wysokie koszty paliwa, coraz częściej poszukuje się nowych źródeł zasilania w celu obniżenia kosztów. W silnikach o zapłonie samoczynnym, coraz bardziej popularną metodą jest domieszka propan-butanu. Wynika to ze względu na cenę tego paliwa jak również na poprawę efektywności spalania. Wraz z rozwojem tego typu zasilania dwupaliwowego rozsądnym wydaje się być badanie wpływu dodatku LPG na emisję hałasu oraz generowanie drgań, jak również próba oceny procesu spalania. W artykule opisano wstępne badania dotyczące tych zjawisk na przykładzie silnika Yanmar L70 ze zmodyfikowanym układem zasilania oleju napędowego oraz instalacją LPG w fazie gazowej. Przedstawiono wyniki badań wibroakustycznych podczas pracy silnika pod obciążeniem dla różnych udziałów dawki LPG oraz podczas zamiany części oleju napędowego olejami estrowymi.
Źródło:
Diagnostyka; 2014, 15, 4; 53-57
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reducing Diesel Engine Emission using Reactivity Controlled Approach
Autorzy:
Ghazal, O. H.
Powiązania:
https://bibliotekanauki.pl/articles/124927.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
CFD
dual fuel
RRCI engine
green cars
emissions
diesel engine
Opis:
Several automobile manufacturers are interested in investigating of dual fuel internal combustion engines, due to high efficiency and low emissions. Many alternative fuels have been used in dual fuel mode for IC engine, such as methane, hydrogen, and natural gas. In the present study, a reactivity controlled compression ignition (RCCI) engine using gasoline/diesel (G/D) dual fuel has been investigated. The effect of mixing gasoline with diesel fuel on combustion characteristic, engine performance and emissions has been studied. The gasoline was injected in the engine intake port, to produce a homogeneous mixture with air. The diesel fuel was injected directly to the combustion chamber during compression stroke to initiate the combustion process. A direct injection compression ignition engine has been built and simulated using ANSYS Forte professional code. The gasoline amount in the simulation varied from (50%-80%) by volume. The diesel fuel was injected to the cylinder in two stages. The model has been validated and calibrated for neat diesel fuel using available data from the literature. The results show that the heat release rate and the cylinder pressure increased when the amount of added gasoline is between 50%-60% volume of the total injected fuels, compared to the neat diesel fuel. Further addition of gasoline will have a contrary effect. In addition, the combustion duration is extended drastically when the gasoline ratio is higher than 60% which results in an incomplete combustion. The NO emission decreased drastically as the gasoline ratio increased. Moreover, addition of gasoline to the mixture increased the engine power, thermal efficiency and combustion efficiency compared to neat diesel fuel.
Źródło:
Journal of Ecological Engineering; 2018, 19, 1; 94-103
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some aspects of dual fueling of the middle class modern CI engines
Autorzy:
Stelmasiak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/242729.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual fuel
natural gas
gas injection
common rail
combustion process
Opis:
The paper presents results of studies on the dual fuel engine equipped with the Common Rail high pressure injection system and low pressure natural gas injection into the inlet collector. Impact of some regulation parameters of the feed system on the engine performance parameters was examined. Research of the pilot dose selection showed that the minimal size of the dose was limited to ca 12+13% of the nominal dose. It is a result of some troubles of the electromagnetic injector operation at short times of control. The effect of that is a notable deterioration of smoothness of the engine operation. However, electronic control of the injector opening timing enables to reduce the pilot dose size as the engine load is reduced. The research showed advantageous impact of the decreasing dose on the engine efficiency and exhaust gas toxicity at partial loads of the engine. The tests reconfirmed full usefulness of the system to combustion process optimization. A delay of the injection start at high engine loads enables to reduce nearly twice the NOx concentration in exhaust gas with insignificant decreasing, some 1+1.5%, of its efficiency. The used systems showed their high suitability to control charge quality in dual fuel engines, in traction applications in particular.
Źródło:
Journal of KONES; 2007, 14, 4; 453-462
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of engine control on the energetic inter change ability of diesel oil by gas in dual fuel GI engine
Autorzy:
Stelmasiak, Zdzisław
Powiązania:
https://bibliotekanauki.pl/articles/243872.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual fuel
engine control
natural gas
pilot dose
gas share
thermal efficiency
Opis:
A compression ignition engine fuelled simultaneously with two fuels: a fuel with low cetane number used as the main fuel, and Diesel oil used to initiation of ignition, is assumed to be called as a dual fuel engine. This system is perfectly suited to adaptation to supply of CNG gas in majority of compression ignition engines. Such adaptations can concern both an older engine equipped with classic injection system, and modern engine with common rail system. In traction engines, interchangeability of liquid fuel by the gas belongs to important issues, what is a condition of profitability of the adaptation and operation of dual fuel engines. In the paper are presented test results of the 1CA90 engine with piston pump to injection of liquid fuel, and a system with mixer to supply of the gas; and the SB3.1 engine equipped with common rail system and injection of the gas in area of the inlet valve. On the base of performed tests one has shown variability of energetic fraction of the CNG gas in total energy supplied to the engine. The tests were performed in complete field of variability of engine parameters, i.e. rotational speed and engine load. Obtained results have shown that in spite of decreasing fraction of the gas at partial loads of medium size traction engines, substantial reduction of operational consumption of the Diesel oil is possible. Due to significant differences in price of the CNG gas and the Diesel oil, it gives considerable savings in operational costs of the engines. It should encourage users of the engines to adaptation of the fuelling to the CNG gas. In the paper is presented a proposal of control system to dual fuel traction engine, from maintaining its performance parameters point of view.
Źródło:
Journal of KONES; 2013, 20, 4; 425-434
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual-fuel hydrogen-diesel compression ignition engine
Dwupaliwowy silnik wysokoprężny zasilany olejem napędowym i wodorem
Autorzy:
Borecki, R.
Szwaja, S.
Pyrc, M.
Powiązania:
https://bibliotekanauki.pl/articles/241801.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dwupaliwowy silnik spalinowy
olej napędowy
wodór
internal combustion engine
dual fuel
diesel
hydrogen
Opis:
Od wielu lat w ośrodkach naukowych na całym świecie prowadzone są badania nad zasilaniem wodorem silników pojazdów mechanicznych. Prowadzone są także próby spalania wodoru w silniku dwupaliwowym zasilanym dodatkowo olejem napędowym. W Instytucie Maszyn Tłokowych i Techniki Sterowania Politechniki Częstochowskiej zbudowano stanowisko badawcze umożliwiające spalanie wodoru w silniku wysokoprężnym, który był dodatkowo zasilany olejem napędowym wtryskiwanym bezpośrednio do cylindra. Natomiast wodór doprowadzany był do silnika poprzez układ wtryskowy zamontowany na kolektorze dolotowym lub poprzez mieszalnik. Stanowisko zbudowano na bazie silnika wysokoprężnego firmy DEUTZ typ FL511 napędzającego prądnicę synchroniczną o mocy 20 kVA. W artykule przedstawiono przykładowe wyniki eksperymentalne badań silnika zasilanego dwupaliwowo olejem napędowym i wodorem o proporcji 50/50% pod względem udziału energetycznego oraz silnika zasilanego wyłącznie wodorem, którego zapłon inicjowany był samoczynnie. Wyniki badań przedstawiają przebiegi ciśnienia w cylindrze, składową zmienną tego ciśnienia, rozkłady statystyczne położenia 10, 50 i 90% spalonego ładunku (MFB) oraz charakterystykę spalania stukowego.
Investigation on a hydrogen fuelled engine has been conducted all over the world for several years. Hydrogen-diesel bi- fuelling application to a compression ignition (CI) engine is also of the interest. A test bed, which provides opportunities for both hydrogen combustion and diesel-hydrogen co-combustion research in the CI engine, has been built in the Institute of Internal Combustion Engines and Control Engineering of Czestochowa University of Technology. A classic direct injection system has been applied for fuelling the engine. Hydrogen can be delivered to the engine combustion chamber in two different ways: by a port fixed hydrogen injector or by a mixer, installed in the inlet manifold just pass the injector. Main parts of the test bed are as follows: 2 in-line air-cooled compression ignition (CI) engine FL511 made by Deutz and a synchronous generator of power output of 20 kVA. Tests were carried out for the hydrogen fuelled engine. Hydrogen was self-ignited due to high compression ratio of the engine. Additionally, there were tests of combustion of hydrogen, ignited by a diesel dose directly injected into the cylinder under proportion of 50/50% concerning energy share of the ach fuel. The research, presented in the paper, contains results of in-cylinder pressure analysis with respect to combustion knock intensity and mass fraction burnt (MFB) location against crank angle. There is also comparison made between these two tests and the test conducted for an original diesel engine.
Źródło:
Journal of KONES; 2008, 15, 4; 49-56
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the effect of diesel fuel injection parameters on the exhaust emissions in the turbocharged CI engine operating on propane
Autorzy:
Luft, Sławomir
Skrzek, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/133561.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
combustion engines
dual fuel
propane
alternative fuels
air pollution
silniki spalinowe
gazodiesel
propan
paliwa alternatywne
zanieczyszczenie powietrza
Opis:
The article presents results of the studies on the charged, dual-fuel CI compression ignition engine fuelled with propane. The main goal of the studies was to fuel the engine so that the amount of energy provided with propane is possibly highest at the high efficiency, low emission of harmful exhaust constituents and proper combustion. As the studies conducted so far have shown, with the increase of energy from propane we observe crucial changes in the combustion process. As these changes may be a barrier in the further increase of energy, we decided to change the injection parameters of the diesel fuel. The changes introduced allowed for the 70% energetic contribution of gas fuel at the subsequent elimination of unfavourable phenomena. The fuel injection was realized divided into two doses. Both proportions and angle at the beginning of the injection for both doses were variable. The angle at the beginning of injection for the first dose was changed in a wide range and depended on the value of charging pressure. The angle at the beginning of injection for the second dose was changed in a much narrower range, mainly due to very clear changes in the nature of combustion process. The studies have been conducted for three values of charging pressure, namely 200; 400 and 600 [mbar], and also for the naturally aspirated version. Study results have been presented in a form of regulation characteristics for the angle of the beginning of injection of the pilot dose for the chosen charging variants, as well as volume and angle of the beginning of injection for the main dose. The obtained results show that the content of exhaust constituents for the dual-fuel CI engine depends highly on assumed regulations of injection parameters of the fuel dose initiating the ignition, as well as engine charging pressure.
Źródło:
Combustion Engines; 2019, 58, 2; 180-186
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new concept of dual fuelled SI engines run on gasoline and alcohol
Nowa koncepcja dwupaliwowego zasilania silników o zapłonie iskrowym benzyną i alkoholem
Autorzy:
Stelmasiak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/224359.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zasilanie dwupaliwowe
silnik dwupaliwowy
alkohol metylowy i benzyna
SI engine
dual fuel
thermal efficiency
toxicity
alcohol share
Opis:
The paper discusses tests results of dual-fuel spark ignition engine with multipoint injection of alcohol and gasoline, injected in area of inlet valve. Fuelling of the engine was accomplished via prototype inlet system comprising duplex injectors controlled electronically. Implemented system enables feeding of the engine with gasoline only or alcohol only, and simultaneous combustion of a mixture of the both fuels with any fraction of alcohol. The tests were performed on four cylinders, spark ignition engine of Fiat 1100 MPI type. The paper presents comparative results of dual-fuel engine test when the engine runs on changing fraction of methyl alcohol. The tests have demonstrated an advantageous effect of alcohol additive on efficiency and TCH and NOx emission of the engine, especially in case of bigger shares of the alcohol and higher engine loads.
W artykule przedstawiono wyniki badań dwupaliwowego silnika o zapłonie iskrowym z wielopunktowym wtryskiem alkoholu i benzyny w okolice zaworu dolotowego. Zasilanie silnika realizowano przez prototypowy układ dolotowy zawierający podwójne wtryskiwacze sterowane elektronicznie. Zastosowany system umożliwia zasilanie silnika samą benzyną lub alkoholem oraz spalanie równoczesne mieszaniny obydwu paliw o dowolnym udziale alkoholu. Badania wykonano na 4-cylindrowym silniku o zapłonie iskrowym Fiat 1100 MPI. W artykule przedstawiono porównawcze wyniki badań sprawności i stężenia toksycznych składników spalin silnika zasilanego dwupaliwowo o zmiennym udziale alkoholu metylowego. Badania pokazały korzystny wpływ dodatku alkoholu na sprawność i ekologiczne własności silnika, szczególnie dla większych udziałów alkoholu i obciążeń silnika.
Źródło:
Archives of Transport; 2011, 23, 2; 209-221
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulations of dual fuel combustion in a heavy duty compression ignition engine
Symulacje numeryczne jednoczesnego spalania dwóch paliw w silniku o zapłonie samoczynnym dużej mocy
Autorzy:
Kapusta, Ł. J.
Teodorczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/133481.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
dual fuel
propane
LPG
direct injection
heavy duty engine
silnik dwupaliwowy
propan
wtrysk bezpośredni
silnik dużej mocy
Opis:
In this study dual fuel direct injection was studied in terms of utilizing in compression ignition engines gaseous fuels with high octane number which are stored in liquid form, specifically liquid propane. Due to the fact that propane is not as much knock-resistant as natural gas, instead of conventional dual fuel system a system based on simultaneous direct injection of two fuel was selected as the most promissing one. Dual fuel operation was compared with pure diesel operation. The performed simulations showed huge potential of dual fuel system for burning light hydrocarbons in heavy duty compression ignition engines. However, further secondary fuel injection system optimization is required in order to improve atomization and lower the emissions.
W niniejszej pracy przeanalizowano dwupaliwowy układ zasilania oparty na bezpośrednim wtrysku dwóch paliw w kontekście wykorzystania gazowych paliw o dużej liczbie oktanowej, mianowicie propanu, w silnikach o zapłonie samoczynnym. Z uwagi na to, iż propan nie jest tak odporny na spalanie stukowe jak metan, zamiast konwencjonalnego układu dwupaliwowego łączącego wtrysk bezpośredni i pośredni zdecydowano się na zastosowanie koncepcji zasilania opartej na bezpośrednim wtrysku dwóch paliw. Praca silnika w trybie dwupaliwowym została porównana z pracą silnika wyłącznie na oleju napędowym. Przeprowadzone symulacje pokazały duży potencjał układów dwupaliwowych w kontekście wykorzystania lekkich węglowodorów w silnikach o zapłonie samoczynnym dużej mocy. Jednak, dalsza optymalizacja układu paliwowego jest niezbędna, aby poprawić proces rozpylenia paliwa i obniżyć emisję.
Źródło:
Combustion Engines; 2015, 54, 4; 47-56
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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