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Wyszukujesz frazę "Pielecha, Ireneusz" wg kryterium: Autor

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    Wyświetlanie 1-8 z 8
    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:
    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:
    Relations between ion signal and flame propagation in cylinder of a rapid compression machine
    Autorzy:
    Fiedkiewicz, Łukasz
    Pielecha, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/133907.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    ion current
    flame speed
    high speed camera
    rapid compression machine
    prąd jonowy
    prędkość płomienia
    szybka kamera wideo
    maszyna pojedynczego sprężu
    Opis:
    Internal combustion engine diagnostics using traditional methods of cylinder pressure signal processing limits the amount of information available about the combustion process. It is necessary to conduct research in order to obtain more precise information - in-creasing the combustion process diagnosis potential. One such suggestion is the use of an ionization signal and an attempt to link it to the flame development during combustion of gaseous fuels. The article attempts to identify such a relationship using a rapid compression machine due to optical access it provides to the combustion chamber. As a result of the research, the relationships between the ionization voltage (chemical and thermal) of the first combustion phase and the corresponding flame development rates were determined. A relatively high coefficient of determination value was obtained for both relations, which indicates the possibility of obtaining diagnostic information about the combustion process from the ionization signal.
    Źródło:
    Combustion Engines; 2019, 58, 4; 264-268
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    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:
    Selection of ion sensor operating parameters in quasi-static conditions
    Autorzy:
    Fiedkiewicz, Łukasz
    Pielecha, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/133839.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    ionization sensor
    engine control
    combustion process diagnostics
    czujnik jonizacji
    sterowanie silnika
    diagnostyka procesu spalania
    Opis:
    Evaluating combustion quality using sensors that allow continuous assessment of the process is one of the modern methods of engine sensory diagnostics. The proper calibration of such systems is a task that requires many studies to determine the conditions and quantities affecting the process. The analysis of significance of quantities related to the ionization signal was carried out in the article. The magnitude of the voltage generating the electric field, the type of spark plug used, the distance of the spark plug electrodes and the dynamic factor - spark plug operating temperature - were all tested. The tests were carried out using a CNG burner (with an excess air ratio of λ = 1) and four spark plugs. As a result of the ionization signal research, the following relationships were obtained: regarding the impact of the sensor position on the amount of generated voltage (the smaller the distance the greater the value of the signal), the effect of temperature on the sensor resistance (non-linear relationship: increase in temperature decreases resistance, with R2 = 0.9997) effect of system voltage on the ionization signal (linear relationship: voltage increase increases the ionization current signal with a determination coefficient of R2 = 0.9803). In addition, it was found that using an iridium electrode candle had the best effects on the ionization current, regardless of the electrode’s geometrical parameters.
    Źródło:
    Combustion Engines; 2019, 58, 4; 254-258
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Potential of ethanol and butanol in reducing deposits of SIDI engine injectors
    Autorzy:
    Pielecha, Ireneusz
    Szwajca, Filip
    Stępień, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/24202472.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    spark ignition engine
    direct fuel injection
    fuel injector deposits
    ethanol
    butanol
    silnik z zapłonem iskrowym
    bezpośredni wtrysk paliwa
    osady wtryskiwaczy paliwa
    etanol
    Opis:
    The operation of conventional (hydrocarbon) fuels causes certain effects in the internal combustion engine. Despite the satisfactory efficiency of internal combustion engines, their fuel systems, particularly the injectors, are subject to constant fouling. The article analyzes the possibility of reducing the deposit of high-pressure gasoline injectors using the alcohol addition of ethanol and butanol. The study was conducted under the engine and non-engine conditions. Fuel injection timing was analyzed when fueling with different mixtures, and non-engine analyses were conducted to determine changes affecting the injectors. The results indicate the possibility of reducing injector hole coking using ethanol and butanol as a 20% additive to the base fuel.
    Źródło:
    Combustion Engines; 2023, 62, 3; 21--31
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    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:
    Prechamber optimal selection for a two stage turbulent jet ignition type combustion system in CNG-fuelled engine
    Autorzy:
    Pielecha, Ireneusz
    Bueschke, Wojciech
    Skowron, Maciej
    Fiedkiewicz, Łukasz
    Szwajca, Filip
    Powiązania:
    https://bibliotekanauki.pl/articles/133967.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    gas engine
    prechamber
    thermodynamic analysis
    combustion
    exhaust emission
    optimization
    silnik gazowy
    komora wstępna
    analiza termodynamiczna
    spalanie
    emisja spalin
    optymizacja
    Opis:
    Searching for further reduction of fuel consumption simultaneously with the reduction of toxic compounds emission new systems for lean-mixture combustion for SI engines are being discussed by many manufacturers. Within the European GasOn-Project (Gas Only Internal Combustion Engines) the two-stage combustion and Turbulent Jet Ignition concept for CNG-fuelled high speed engine has been proposed and thoroughly investigated where the reduction of gas consumption and increasing of engine efficiency together with the reduction of emission, especially CO2 was expected. In the investigated cases the lean-burn combustion process was conducted with selection of the most effective pre-combustion chamber. The experimental investigations have been performed on single-cylinder AVL5804 research engine, which has been modified to SI and CNG fuelling. For the analysis of the thermodynamic, operational and emission indexes very advanced equipment has been applied. Based on the measuring results achieved for different pre-chamber configurations the extended methodology of polioptimization by pre-chamber selection and the shape of main chamber in the piston crown for proposed combustion system has been described and discussed. The results of the three versions of the optimization methods have been comparatively summarized in conclusions.
    Źródło:
    Combustion Engines; 2019, 58, 1; 16-26
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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