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Tytuł:
Analysis of mass transfer in marine engine with prechamber combustion spark ignition system
Autorzy:
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2128135.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
marine engine
prechamber combustion spark ignition
combustion process modeling
combustion thermodynamics
silnik morski
zapłon iskrowy spalania w komorze wstępnej
modelowanie procesu spalania
termodynamika spalania
Opis:
The development of combustion systems construction is associated with the possibility of increasing the thermal or overall efficiency of an internal combustion engine. The combustion systems currently in use (mainly related to direct fuel injection) are increasingly being replaced by hybrid systems, including direct and indirect injection. Another alternative is the use of prechambers in new combustion systems. This article concerns the thermodynamic aspect of this issue – namely, the assessment of the inter-chamber f low of a marine engine equipped with a prechamber combustion spark ignition system. The research was carried out using mainly one-dimensional simulation apparatus, and detailed analyses were presented using three-dimensional modeling. The tests included the engine model at medium load. Differences in mass f lows were shown at different diameters and different numbers of holes from the preliminary chamber (while maintaining the same cross-sectional area). Similar values of excess air coefficient during ignition of the fuel dose in the prechamber were observed, which resulted in changes in the f low between the prechamber and the main chamber. The differences in mass f low affected the temperatures achieved in the individual combustion chambers. Based on three-dimensional analyses, the mass transfer rate between the chambers and the temperature distribution were assessed during fuel ignition initiated in the prechamber.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136744, 1--8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of mass transfer in marine engine with prechamber combustion spark ignition system
Autorzy:
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2173605.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
marine engine
prechamber combustion spark ignition
combustion process modeling
combustion thermodynamics
silnik morski
zapłon iskrowy spalania w komorze wstępnej
modelowanie procesu spalania
termodynamika spalania
Opis:
The development of combustion systems construction is associated with the possibility of increasing the thermal or overall efficiency of an internal combustion engine. The combustion systems currently in use (mainly related to direct fuel injection) are increasingly being replaced by hybrid systems, including direct and indirect injection. Another alternative is the use of prechambers in new combustion systems. This article concerns the thermodynamic aspect of this issue – namely, the assessment of the inter-chamber f low of a marine engine equipped with a prechamber combustion spark ignition system. The research was carried out using mainly one-dimensional simulation apparatus, and detailed analyses were presented using three-dimensional modeling. The tests included the engine model at medium load. Differences in mass f lows were shown at different diameters and different numbers of holes from the preliminary chamber (while maintaining the same cross-sectional area). Similar values of excess air coefficient during ignition of the fuel dose in the prechamber were observed, which resulted in changes in the f low between the prechamber and the main chamber. The differences in mass f low affected the temperatures achieved in the individual combustion chambers. Based on three-dimensional analyses, the mass transfer rate between the chambers and the temperature distribution were assessed during fuel ignition initiated in the prechamber.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; art. no. e136744
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania silników lokomotyw spalinowych w świetle dopuszczeń do eksploatacji na torach polskich linii kolejowych
Tests of the diesel locomotives engines in the light of acceptances for operation on the tracks of the Polish railway lines
Autorzy:
Marciniak, Zygmunt
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/34671795.pdf
Data publikacji:
2006
Wydawca:
Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:
silniki lokomotyw spalinowych
spaliny pojazdów trakcyjnych
składniki toksyczne spalin
Opis:
Artykuł poświęcony jest zagadnieniom badania silników spalinowych pojazdów trakcyjnych, zwłaszcza lokomotyw, sprowadzanych do kraju z zagranicy. Przedstawiono dopuszczalne limity zawartości składników toksycznych w spalinach emitowanych do atmosfery przez silniki stosowane w spalinowych pojazdach trakcyjnych według różnych przepisów i dyrektyw. Ponadto zaprezentowano aparaturę wraz z metodyką badań i zasadami określania poziomów emisji najważniejszych składników toksycznych oraz przedstawiono wyniki badań prowadzonych na lokomotywach (sprowadzanych zazwyczaj z zagranicy), zarówno z silnikami remontowanymi jak i z nowymi silnikami wymienianymi w ramach napraw i modernizacji. W zakończeniu przedstawiono wskazówki dla spełnienia przez silniki spalinowe określonych wymagań w zakresie emisji składników toksycznych.
This article is devoted to problems of the tests of diesel engines of the traction vehicles, especially locomotives imported from abroad to the country. The acceptable limits of toxic constituents content in the exhaust gas emitted to the atmosphere by the engines used in the diesel traction vehicles under the different regulations and instructions are presented. Moreover, the apparatus with the methodics of tests with the rules of definition of the emission level of the most important toxic constituents are presented and the results of tests carried out on the locomotives (usually imported from abroad), both with the repaired engines and with the new replaced engines within repairs and modernization, are presented. In the end the instructions for complying with the specified requirements by the diesel engines in the range of emission of the toxic constituents are presented.
Źródło:
Rail Vehicles/Pojazdy Szynowe; 2006, 3; 31-44
0138-0370
2719-9630
Pojawia się w:
Rail Vehicles/Pojazdy Szynowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of fuel cells under static and dynamic conditions
Autorzy:
Szwajca, Filip
Berger, Andrew W.
Spalletta, Robert
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/32101706.pdf
Data publikacji:
2022-12-28
Wydawca:
Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:
fuel cell stack
fuel cell module
static and dynamic characteristics
fuel cell efficiency
Opis:
Modern internal combustion powertrains are the main source of propulsion for on-road and non-road vehicles. However, they are increasingly being replaced by electric or fuel cell-equipped alternative propulsion systems. The article presents a study of fuel cell characteristics operating under both static and dynamic conditions, with a 1.2 kW fuel cell set with a voltage converter and lead-acid batteries. In the conducted tests, the fuel cell stack's maximum efficiency reached 65%. Load tests (static and dynamic) have indicated higher fuel cell efficiencies when using hybrid operation with a DC/DC converter and battery.
Źródło:
Rail Vehicles/Pojazdy Szynowe; 2022, 3-4; 44-52
0138-0370
2719-9630
Pojawia się w:
Rail Vehicles/Pojazdy Szynowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control algorithms for a Range Extender vehicle with an combustion engine
Autorzy:
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2097473.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
control algorithms
Range Extender
electric motor
combustion engine
battery systems
algorytmy sterowania
silnik elektryczny
silnik spalinowy
układ akumulatorowy
Opis:
The combination of two drive sources: the internal combustion engine and the electric motor in the hybrid drive system requires an appropriate control system to manage their operation. It relies on many variables, and the greater the degree of drive hybridization the greater is the degree of interdependence of the parameters involved. The article presents solutions of electric drive control algorithms with an additional power source in the form of an internal combustion engine (Range Extender). The results of simulation analyzes in the AVL Cruise program are presented, taking into account three control algorithms and two driving cycles. The obtained results indicate the necessity to take various input quantities into account in order to optimize the use of the combustion engine.
Źródło:
Combustion Engines; 2020, 59, 4; 3--10
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cooperation of a PEM fuel cell and a NiMH battery at various states of its charge in a FCHEV drive
Autorzy:
Pielecha, Ireneusz
Szwajca, Filip
Powiązania:
https://bibliotekanauki.pl/articles/2038208.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
hybrid drive
fuel cells
energy flow
vehicle drive energy management
Opis:
The development of electromobility is focused on the design and implementation of increasingly more effective electric drives. In such a system, apart from energy recovery, it is not possible to recharge the batteries while driving. Electric vehicles equipped with fuel cells and a battery (FCHEV – fuel cell hybrid electric vehicle) in a parallel configuration boast increased energy transfer capabilities. The article presents an energy flow analysis in a parallel hybrid drive system with fuel cells and a battery. The research was carried out on a 30 W vehicle made in 1:10 scale with a NiMH battery and a fuel cell with a proton exchange membrane (PEM). Increasing driving dynamics causes a 29% increase in energy consumption, 43.6% reduction of energy transfer from a fuel cell and a 23% increase of in the energy share intended for battery charging. Continuous operation of the system in full power mode ensures a much greater efficiency of energy transmission to the drive train (95%) compared to the system operating in dynamic driving conditions – 64–75%.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 3; 468-475
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of mixture formation strategies on combustion in dual-fuel engines - a review
Autorzy:
Pielecha, Ireneusz
Sidorowicz, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2097496.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
dual fuel engine
excess air coefficient
multi-fuel mixture forming
silnik dwupaliwowy
współczynnik nadmiaru powietrza
formowanie mieszanki wielopaliwowej
Opis:
The article presents an overview of technical solutions for dual fuel systems used in internal combustion engines. It covers the historical and contemporary genesis of using two fuels simultaneously in the combustion process. The authors pay attention to the value of the excess air coefficient in the cylinder, as the ignitability of the fuel dose near the spark plug is a critical factor. The mixture formation of compression ignition based systems are also analyzed. The results of research on indirect and direct injection systems (and their combinations) have been presented. Research sections were separated based to the use of gasoline with other fuels or diesel oil with other fuels. It was found that the use of two fuels in different configurations of the fuel supply systems extends the conditions for the use of modern combustion systems (jet controlled compression ignition, reactivity controlled compression ignition, intelligent charge compression ignition, premixed charge compression ignition), which will enable further improvement of combustion efficiency.
Źródło:
Combustion Engines; 2021, 60, 1; 30--40
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emisja spalin z wozów bojowych Rosomaka w warunkach poligonowych
Autorzy:
Merkisz, Jerzy (1947- ).
Pielecha, Ireneusz.
Pielecha, Jacek.
Szukalski, Maciej.
Powiązania:
Zeszyty Naukowe / Akademia Marynarki Wojennej im. Bohaterów Westerplatte 2011, nr 1(184), s. 85-90
Data publikacji:
2011
Tematy:
KTO Rosomak (wóz bojowy) eksploatacja
Metody badawcze
Silniki spalinowe
Spalanie
Opis:
Rys., tab.
Bibliogr.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Energy flow analysis based on a simulated drive of a hybrid locomotive powered by fuel cells
Autorzy:
Pielecha, Ireneusz
Dimitrov, Radostin
Mihaylov, Veselin
Powiązania:
https://bibliotekanauki.pl/articles/32101666.pdf
Data publikacji:
2022-08-29
Wydawca:
Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:
rail vehicles
energy flow
hybrid vehicles
fuel cell simulation
high voltage battery
Opis:
Implementation of hybrid drives in rail vehicles is a solution aimed at limiting the negative environmental impact of transport. The use of fuel cell systems is a contemporary trend in the development of locomotives. The paper presents an energy flow analysis in a hybrid locomotive powered using fuel cells. The parallel hybrid drive system consisted of fuel cells, batteries and an electric motor. The simulations and analyzes were performed with the use of AVL Cruise M software. A simulated route, with a length of approximately 300 km, was used as basis for the analysis, taking into account a typical speed profile of a locomotive in passenger traffic. The energy flow and consumption values were estimated, and mean hydrogen consumption values were determined.
Źródło:
Rail Vehicles/Pojazdy Szynowe; 2022, 1-2; 68-76
0138-0370
2719-9630
Pojawia się w:
Rail Vehicles/Pojazdy Szynowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy management system of the hybrid ultracapacitor-battery electric drive vehicles
Autorzy:
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/1832900.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electric vehicle
battery
ultracapacitor
energy flow modeling
pojazd elektryczny
bateria
ultrakondensator
Opis:
The search for new, alternative propulsion and energy sources in transport is one of the economic and technological priorities of the current decade. The modern development of hybrid drives and electric means of transport makes it possible to at least partially diversify conventional drive systems. The study discusses the use of a battery and ultracapacitor in electric vehicles. Simulation analyzes of energy flow were performed using the solutions of electric drive systems and various energy storage control algorithms. The research was carried out in relation to the use of braking energy, its con-version into electricity and its storage in a battery or ultracapacitor. The operating conditions of the battery and the ultra-capacitor were assessed in terms of specific energy consumption while driving. The article proposed the use of a drive system connected in series, the last link of which was an ultracapacitor. Such a solution significantly reduced the use of the battery as well as its regular charging-discharging. At the same time, it required the use of a high-capacity ultracapacitor, which contributed to increasing its charging time. The analyzes were carried out using standardized research tests as well as tests in real traffic conditions. The research was carried out with the use of the AVL Cruise software for the analysis of energy flow in vehicles; a middle class passenger vehicle was selected for the tests, equipped with an electrochemical battery and – in the next stage of the research – an ultracapacitor. Three research models were used: I) typical electric drive system; II) a system with the use of ultracapacitors ran by a simple control algorithm; III) a system with the use of ultracapacitors with an advanced control algorithm (the algorithm took into account the change of driving conditions to the ultracapacitor charging conditions). The advantages of using ultracapacitors in the electric drive of a vehicle were demonstrated, especially for results obtained in real traffic conditions. Analyzing the simulation tests results allowed to determine the most advantageous options of utilizing these systems, in particular in the aspect of increased possibilities of algorithms controlling the flow of electricity in the drive system.
Źródło:
Archives of Transport; 2021, 58, 2; 47-62
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern drive systems of rail vehicles
Autorzy:
Andrzejewski, Maciej
Pielecha, Ireneusz
Merkisz, Jerzy
Świechowicz, Robert
Nowak, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/133660.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
rail vehicles
combustion engines
hybrid drive system
pojazdy szynowe
silniki spalinowe
hybrydowy układ napędowy
Opis:
Rail vehicles are one of the sources of environmental pollution in the transport sector. Therefore, it is necessary to equip these vehicles with modern drive systems. This article concerns the issues of contemporary and future-oriented solutions of drive systems used in rail vehicles. The article analyzes energy storage possibilities including: electrochemical, mechanical and hydraulic accumulators. The conducted analyzes have taken into account the importance of how frequently they charge up, which dictates their possible applications. Characteristics of hybrid drive systems were presented, with particular emphasis on parallel systems of: hydrostatic, flywheels and electrochemical batteries. The analysis of energy flow control strategies in hybrid drive systems of railway vehicles has been made. In the summary, a solution was chosen that resulted in high conversion efficiency of the energy extracted from the vehicle's wheels.
Źródło:
Combustion Engines; 2019, 58, 3; 76-81
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości oceny warunków eksploatacji KTO Rosomak na podstawie pokładowych systemów diagnostycznych
Autorzy:
Merkisz, Jerzy (1947- ).
Pielecha, Ireneusz.
Pielecha, Jacek.
Szukalski, Maciej.
Powiązania:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki 2010, nr 4, s. 164-176
Data publikacji:
2010
Tematy:
Wozy bojowe eksploatacja
KTO Rosomak (wóz bojowy) obsługa i eksploatacja
Opis:
Bibliogr.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Numerical investigation of lambda-value prechamber ignition in heavy duty natural gas engine
Autorzy:
Pielecha, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/2097459.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
turbulent jet ignition
combustion thermodynamics
combustion process indicators
numerical simulation
turbulentny zapłon odrzutowy
termodynamika spalania
wskaźniki procesu spalania
symulacja numeryczna
Opis:
Turbulent Jet Ignition systems are mainly dedicated to the combustion of lean mixtures of natural gas in heavy duty engines. The use of such a system in combination with lean mixtures leads to an increase in its overall efficiency. The article presents simulation analyzes of the impact of the air excess coefficient occurring in prechamber on the combustion process: combustion indicators and emission indicators. Tests on a single-cylinder engine with a displacement of about 4 dm3 at medium mixture (IMEP = 1.0 MPa) were carried out using the AVL Fire software. It was found that the incineration of global lean mixtures (λ = 2) is effective when initiating this process (in the prechamber) with a charge of a stoichiometric composition. A strong relationship was found between the thermodynamic indicators in both prechamber and main chamber and the air excess coefficient initiating combustion.
Źródło:
Combustion Engines; 2020, 59, 2; 31--39
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen
Autorzy:
Pielecha, Ireneusz
Szwajca, Filip
Skobiej, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/32103224.pdf
Data publikacji:
2023-11-30
Wydawca:
Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:
hydrogen engine
engine simulation
hydrogen combustion
methane combustion
combustion indicator
turbulent jet ignition engine
Opis:
The modern solution of two-stage combustion, namely the Turbulent Jet Ignition (TJI), enables the combustion of ultra-lean mixtures. Thanks to this solution, it became possible to reduce fuel consumption and, at the same time, to increase the combustion process indicators (including the overall combustion system efficiency). The article presents the results of numerical tests of a heavy-duty engine equipped with the TJI system running on gas fuels. The AVL BOOST software was used to analyze the effects of different fuel injection rates into the pre-chamber and various ignition timing angles, while maintaining a constant global excess air ratio. Increasing the proportion of hydrogen in the prechamber resulted in its reduction in the main chamber (the fuel dose was kept constant with different excess air coefficients in each of the chambers). The maximum combustion pressure values in both chambers were investigated. Changes in the amount of heat released and its release rate were determined. As a result of the simulations, different ignition and combustion conditions were presented for the tested fuels. Based on this, maps of fuel dose to prechamber vs. ignition advance angle were drawn up, showing selected thermodynamic indicators of the combustion process.
Źródło:
Rail Vehicles/Pojazdy Szynowe; 2023, 1-2; 46-57
0138-0370
2719-9630
Pojawia się w:
Rail Vehicles/Pojazdy Szynowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operational evaluation of atomization indicators for gasoline with admixtures of ethanol and butanol during Keep-Clean tests
Autorzy:
Pielecha, Ireneusz
Stępień, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2173926.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuel additives
fuel injection
Keep-Clean tests
fuel atomization
fuel injector deposits
operational evaluation
dodatki do paliw
wtrysk paliwa
testy zanieczyszczeń
osady
ocena eksploatacyjna
Opis:
The global policy of reducing road transport sector pollution requires the introduction of significantly modified already in use technologies and construction solutions. Currently, direct fuel injection technology is the best solution in terms of reducing fuel consumption and exhaust emissions of standard pollutants into the atmosphere, as well as further improving the engine performance. In terms of exhaust emissions, direct injection spark ignition engines are characterized by significantly higher exhaust emissions of particulate matter (approximately 10 times higher) compared to indirect fuel injection SI engines, they show a greater tendency to knocking combustion and are prone to the formation of harmful deposits on engine parts, including in the fuel injectors. The injector tips located in the combustion chamber are exposed to the direct influence of the very high pressure and temperature caused by the combusting fuel-air mixture, which contributes to the rapid formation of harmful deposits. Operation-based injectors contamination in spark ignition engines results in a reduction of the cross-sectional flow diameter of the injector, which then necessitates the extension of the injection time in order to maintain the fuel dose and the expected engine operating parameters. The tests were carried out on an engine dynamometer and an optical test stand for fuel atomization process. The presented research analyzes indicate the possibility of using admixtures that effectively reduce the likelihood of contamination. The paper presents a results analysis of engine tests performed in accordance with the CEC F-113-KC procedure. Additionally, the injectors were tested to conduct an analysis of the injected fuel stream’s geometric indicators. The range, surface area and speed of the injected fuel stream as well as the fuel distribution in the stream were determined based on an equivalent indicator. The obtained results indicated that ethanol and butanol admixtures of 10% (V/V) to gasoline did not significantly extend the fuel injection time as compared to the reference fuel. A further increase in the proportion of ethanol caused a significant deterioration of the fuel flow and the geometric indicators of the fuel spray.
Źródło:
Archives of Transport; 2022, 62, 2; 123--137
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
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