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    Wyświetlanie 1-8 z 8
    Tytuł:
    A new fuel-injection mechatronic control method for direct-injection internal combustion engines
    Autorzy:
    Tutaj, J.
    Fijałkowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/387356.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    direct injection
    internal combustion engine
    fuel injection
    injection control system
    Opis:
    In this paper, a novel fuel-injection mechatronic control method and system for direct injection (DI) internal combustion engines (ICE) is proposed. This method and system is based on the energy saving in a capacitance using DC-DC converter, giving a very fast ON state of the fuel injectors’ electro-magnetic fluidical valves without an application of the initial load current. A fuel-injection controller for the DI ICEs that provides a very short rising time of an electromagnet-winding current in an initial ON state of the fuel-injector’s electromagnetic fluidical valves, which improves a fuel-injection controller reliability and simplify its construction, is presented. Due to a number of advantages of afore -mentioned fuel-injection mechatronic control method and system, it may be utilised for the DI ICEs with fuel injectors dedicated to all types of liquid and/or gas fuels, for example, gasoline, diesel-oil, alkohol, LPG and NPG.
    Źródło:
    Acta Mechanica et Automatica; 2018, 12, 4; 276-280
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic aspects of combustion in gasoline engines fitted with a multiple fuel injection
    Autorzy:
    Wislocki, K.
    Pielecha, I.
    Maslennikov, D.
    Czajka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247068.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    direct injection
    combustion engines fuel dose
    rapid compression machine
    Opis:
    The multiple fuel injection is being applied not only in diesel engines but in direct injection gasoline engines as well. The injection duration in gasoline engines is similar (pressure values at present approx. 20 MPa) to the injection duration of diesel fuel. The methodology and results of the tests related to the fuel dose division and injection strategy on the thermodynamic indexes during the combustion process have been presented in the paper. The tests were performed for several ways of fuel dose division at injection pressures of 5, 10 and 20 MPa (modifying also the time of the injection). The paper presents: state of research on the effects of multiple injection in gasoline engines, research equipment and methodology when applying the Rapid Compression Machine, estimation of the thermodynamic indexes, injection strategies, influence of injection pressure on the thermodynamic indexes, single fuel dose, two-phase fuel injection, three-phase fuel injection, changes in the combustion pressure, changes of the average thermodynamic temperature of the charge in the cylinder, heat release rate, heat release and relative value of the heat used for strategies, the influence of the fuel injection pressure on the course of the combustion in a Rapid Compression Machine including the course of the heat release.
    Źródło:
    Journal of KONES; 2011, 18, 4; 543-553
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of using a dual-injector fuel system on a process of combustion in a spark-ignition engine
    Autorzy:
    Sendyka, B.
    Noga, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246083.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dual-injector fuel system
    gasoline
    direct injection
    port injection
    combustion
    spark-ignition engine
    Opis:
    This paper analyzes aprocess of combustion in a spark-ignition engine. The aim of the analysis was to determine the differences in the combustion process between the engine with a classic multipoint injection system and a system which injects fuel directly to the cylinders as well. To aid in the analysis the measurements of the high variable pressure in the engine's cylinder against the crankshaft angle were taken. This allowed us to obtain indicated diagrams for both types of engines. To eliminate distortions, both functions were approximated using combined functions. The other basic parameters were also measured: torque, RPM and instantaneous fuel consumption. The analysis of the indicated diagrams yielded an indicated mean pressure and thermal efficiency for both fuel systems. Then, a comprehensive analysis ofpressures in cylinders was performed in order to determine the way the flame spreads in the cylinder for the two types of engines. The results obtained from this analysis show that the speed of combustion is greater for the charge formed by the dual-injector fuel system. The increased speed of the combustion, especially when it reaches a 50% fraction of the exhaust gas in the cylinder, is what accounts for the increase in the indicated mean pressure and the increase in the thermal efficiency of the engine with a dual-injector fuel system. The time of the spreading of the flame, as well as the fast burn period were reduced. The increased efficiency of the combustion process in the cylinder me ans that the heat losses through the cylinder sleeve are greatly reduced. The results of the research in this paper confirm the purposefulness of using a dual-injector fuel system in a spark-ignition engine.
    Źródło:
    Journal of KONES; 2010, 17, 1; 389-397
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of the work of a spark-ignition engine with a dual-injector fuel system
    Autorzy:
    Sendyka, B.
    Noga, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246079.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dual-injector fuel system
    direct injection
    port injection
    combustion
    spark-ignition engine
    modelling
    simulation
    KIVA-3V
    Opis:
    This paper is about computer modelling of a four-stroke spark-ignition engine with a dual-injector system. Using a KIVA-3V program for Linux, computer simulations were performed for one of the cylinders fuelled by multipoint injection and by the dual-injector system, i. e. with direct injection into the cylinders on top of MPI. The modelling was done for a combustion engine Toyota 2SZ-FE with a dual-injector system. Both simulations were done for the same parameters of engine's work, i.e. at the same RPM of 2000 and the intake pipe pressure of 0.079 MPa. KIVA-3V program models the processes taking place in an internat combustion engine while taking into account physical and chemical phenomena occurring during the formation of a charge and during its combustion. Using a stochastic model of injection the program takes into account the movement of droplets and their dispersion. The results of the simulation show that the dual-injector system has an improved volumetric coefficient, i.e. improved engine performance. An increase in the engine's indicated pressure was also observed; this increases the engine's total efficiency. The intensification of the charge's angular momentum in a cylinder with a dual-injector system can explain the improvements in the course of combustion process. Because the air-fuel mixture was already partially formed in the engine there was a small increase in the unburned hydrocarbons in the cylinder. However, a marked drop in the carbon monoxide and nitric oxide were observed for the dual-injector system. Analyzing the overall results of the simulations one can ascertain a positive impact of using a dual-injector system on the working parameters of a spark-ignition engine.
    Źródło:
    Journal of KONES; 2010, 17, 1; 399-410
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An impact of using a dual-injection system on a combustion engines working parameters
    Autorzy:
    Sendyka, B.
    Noga, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246089.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dual-injector fuel system
    MP1
    direct injection
    combustion
    spark-ignition engine
    experimental investigations
    Opis:
    The paper analyses the impact of using a dual-injection system on the engine's working parameters. The analysis is based on the results of the test stand research on a four-stroke four-cylinder, spark-ignition engine. Dual-injection system combines the multipoint injection with additional injection directly into the combustion chamber. It is used to increase the performance of an engine without affecting the fuel consumption or the low toxicity of exhaust gas. For the purposes of this research an engine from Toyota Yaris was fitted with the direct injection by installing high pressure injectors on the cylinder head. This engine is factory-equipped with MPL Based on the tests performed four controlling characteristics of the torque and brake specific fuel consumption were prepared. The controlling value was the proportion of the fuel injected into the inlet channel to the fuel injected directly into the combustion chamber. The same relationships were also described in relation to temperature of the exhaust gas and the fraction in volume in the exhaust gas of ingredients such as carbon monoxide, carbon dioxide, unburned hydrocarbons and nitric oxide. Points of measurement were decided upon basedon the existing literature on the subject. The analysis of the test results shows apossibility ofa 2-4% decrease in the brake specific fuel consumption for the dual-injection engine in the low and middle RPM range and for the partial loads. The dual-injection engine also shows a decrease in the nitric oxide's fraction in the exhaust gas and a lower temperature of the exhaust gas. There was a small increase in the carbon monoxide and hydrocarbons.
    Źródło:
    Journal of KONES; 2010, 17, 1; 379-388
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of alcohol admixture with gasoline on carbon build-up and fuel injectors performance
    Autorzy:
    Stępień, Zbigniew
    Pielecha, Ireneusz
    Cieslik, Wojciech
    Szwajca, Filip
    Powiązania:
    https://bibliotekanauki.pl/articles/2087005.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    spark ignition combustion engine
    direct injection
    fuel injectors
    injector coking
    gasoline
    alcohol
    injector operating parameters
    Opis:
    The operating conditions of injectors in spark ignition engines with direct fuel injection make them susceptible to coking, which leads to a reduced quality of fuel atomization. This can be observed by a drop in performance and an increase in exhaust emissions, especially particulate matter. One effective method of reducing injector coking is by using detergentdispersing gasoline additives. The article describes the effect of using an admixture with a varied alcohol content on the quantitative and qualitative fuel atomization indicators. The research consisted of a 48-hour engine test, done in accordance with the CEC F-113-KC procedure (CEC-F-113 test). After each test cycle, the injectors underwent optical tests with the use of an isochoric chamber. The spray penetration and surface area were analyzed at a set of different fuel injection parameter values. The research performed resulted in determining the influence of each tested admixture on the change of injection time and on the geometric indicators of the fuel spray. The obtained characteristics of the engine in operation and conducted stationary tests enabled the operational evaluation of the impact an alcohol admixture with gasoline fuels had on key engine parameters.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 2; 226--236
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    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
    Tytuł:
    Optical tests as the basis for formulating mathematical models of the opening delay of CIDI injectors
    Autorzy:
    Skowron, M.
    Wisłocki, K.
    Pielecha, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/133943.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel fuel
    direct injection
    injection delay
    optical research
    solenoid injector
    piezoelectric injector
    olej napędowy
    wtrysk bezpośredni
    opóźnienie wtrysku
    badania optyczne
    wtryskiwacz piezoelektryczny
    wtryskiwacz elektromagnetyczny
    Opis:
    The main objective of this research was an attempt to evaluate the delay times of the actual needle opening of the diesel injectors in relation to the time of triggering the current control signals opening the solenoid and piezoelectric high-pressure injectors of diesel engines. The conducted tests take into account the variability of fuel injection pressure and backpressure prevailing in the operational chamber of the engine. To determine accurately the time of actual injection start, the optical tests analysing the image of the injector tip were used. Such high resolution images were obtained by high-speed recording with a frequency of 250 kHz (Dt = 0.004 ms). Based on a comparison of the results obtained, it was found that the maximum delay time of fuel injection for a piezoelectric diesel injector is about 12% shorter than for a solenoid injector. Experimentally obtained results of the injection time delay were used as a basis to formulate mathematical models describing the delay of the real fuel injection in relation to the signal controlling the opening of the diesel injectors. These models take into account the dependence of the injector reaction from the injection pressure and the backpressure in the operational chamber of the engine. The correctness of the obtained models is confirmed by acceptable values of the determination coefficient (for solenoid injector – 0.6, for piezoelectric injector – above 0.8 – for correlation of injection delay and backpressure).
    Źródło:
    Combustion Engines; 2017, 56, 4; 185-192
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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