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    Wyświetlanie 1-9 z 9
    Tytuł:
    Signal filtering method of the fast-varying diesel exhaust gas temperature
    Autorzy:
    Puzdrowska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/133011.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    exhaust temperature
    parametrical diagnostics
    signal mathematical processing
    silnik spalinowy
    temperatura spalin
    diagnostyka parametryczna
    Opis:
    The paper presents the problem of the impact of external distortions originating on laboratory test stands on the results of measurements of fast-varying diesel exhaust gas temperature. It has been stressed how significant the aspect of the test stand adaptation is during an experiment to ensure the smallest possible impact. This paper, however, focuses on the methods of mathematical processing of a signal recorded during experimental research of a real object. The most significant parameter requiring filtering is the fast-varying exhaust gas temperature in the engine exhaust channel. Methods of mathematical processing adequate to this type of distorted signal have been presented, particularly those that can be used in the Matlab environment and consisting in averaging of the obtained curves of temperature changes. The results of the application of these methods have also been presented on actual curves recorded during laboratory tests and their evaluation has been made.
    Źródło:
    Combustion Engines; 2018, 57, 4; 48-52
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena względnej mocy użytecznej silnika o zapłonie iskrowym na podstawie wartości parametrów termodynamicznych spalin i prędkości obrotowej wału korbowego
    Assessment of the relative power output of the spark-ignition engine based on the values of thermodynamic parameters of exhaust and the crankshaft rotation speed
    Autorzy:
    Markowski, J.
    Pielecha, J.
    Merkisz, J.
    Nowak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/133218.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    silnik benzynowy
    obciążenie silnika
    moc użyteczna
    temperatura spalin
    gasoline engine
    load engine
    power output
    exhaust gas temperature
    Opis:
    Podczas badań emisji związków szkodliwych spalin w warunkach eksploatacji środków transportu przydatne są informacje dotyczące parametrów pracy silnika. Informacje te wykorzystywane są do zdefiniowania m.in. wartości obciążenia silnika podczas eksploatacji środka transportu. W większości pojazdów produkowanych obecnie wykorzystuje się do tych celów informacje z systemów diagnostycznych. Natomiast w badaniach emisji związków szkodliwych z silników tłokowych stosowanych w małych samolotach jest to utrudnione, ponieważ nie wszystkie samoloty są wyposażone w pokładowe rejestratory parametrów lotu. Dlatego w przeprowadzonych badaniach emisji zanieczyszczeń z tłokowych napędów samolotów poszukiwano narzędzia, umożliwiającego dokonanie oceny obciążenia silnika podczas prowadzonych pomiarów w warunkach eksploatacji. W artykule przedstawiono propozycję algorytmu dotyczącego oceny wartości obciążenia tłokowego silnika lotniczego o zapłonie iskrowym na podstawie wartości temperatury spalin i prędkości obrotowej wału korbowego.
    During the research of exhaust emission under operating conditions of means of transport the engine's parameters are highly useful information. That information is used to define values of the engine load during the operation of the means of transport. In most vehicles produced nowadays the information from diagnostic systems is used for this purpose. The other hand, emissions testing of harmful compounds from piston engines used in small aircrafts is difficult because not all aircraft are equipped in on-board flight data recorders. Therefore, in the area of emissions from aircraft piston engines appeared the necessity of creation tool allowing evaluation engine load during the measurements under operating conditions. The article includes an algorithm for the assessment of the load values of aircraft's spark-ignition engines based on exhaust gas temperature and rotation speed of the crankshaft.
    Źródło:
    Combustion Engines; 2015, 54, 3; 469-474
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of high efficiency engines and hybrids on exhaust systems
    Autorzy:
    Weber, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/133204.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    high efficiency engines
    low exhaust temperature
    NH3 sensor
    low backpressure DPF
    silnik o wysokiej wydajności
    niska temperatura spalin
    Opis:
    Increased efficiency of the combustion process itself and low losses in the Engine, lead to lower temperatures in the exhaust line. Combined with the exhaust gas energy recovery as well as the hybridization of the drivetrain, this temperature decrease will require additional efforts for the exhaust gas aftertreatment in future. Current technologies like SCR with urea could only be used in future with additional heating elements or will need to change to different catalysts or gaseous Ammonia, to keep the current efficiency and conversion rates. Catalyst and filter elements with ultra-low backpressure creating additional new challenges for the correct and robust diagnostics of these aftertreatment components and all emission relevant parts and thresholds. New technologies are needed like the direct measurement of the DPF soot loading with radio frequencies or NH3 sensors to precisely control the ammonia slip for high conversion rates of SCR catalysts.
    Źródło:
    Combustion Engines; 2017, 56, 4; 207-210
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the significance of the effect of the active cross-sectional area of the inlet air channel on the specific enthalpy of the exhaust gas of a diesel engine using statistics F of the Fisher-Snedecor distribution
    Autorzy:
    Puzdrowska, Patrycja
    Powiązania:
    https://bibliotekanauki.pl/articles/2097472.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    exhaust gas temperature
    Fisher-Snedecor decomposition F statistic
    diagnosis
    silnik Diesla
    temperatura spalin
    F-statystyka rozkładu Fishera-Snedecora
    diagnoza
    Opis:
    This paper presents the application of Fisher-Snedecor distribution F statistics to assess the significance of the influence of changes in the active cross-sectional area of the inlet air channel (Adol) flow in a diesel engine on the observed diagnostic parameter determined on the basis of measurements of the quick changing exhaust gas temperature in the outlet channel, which is the specific enthalpy of the exhaust gas stream within one engine operating cycle (hspal). A plan of experimental tests carried out on the laboratory stand of a single-cylinder Farymann Diesel type D10 laboratory engine was presented and the method of determination of F statistics values for the obtained measurement results was characterized. Representative results of calculations were presented and the strength of Adol input parameter influence on the determined diagnostic parameter hspal simplified physical model of the working process of a compression ignition engine as the object of diagnosis was evaluated. It is planned to further develop the experimental research program to determine the significance of the influence of changes in the values of selected parameters of the engine structure on other diagnostic measures determined from the exhaust gas temperature signal, i.e. the mean peak-to-peak value as well as the rate (intensity) of increase and decrease in its value for individual engine cycles.
    Źródło:
    Combustion Engines; 2020, 59, 3; 10--15
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the F-statistic of the Fisher-Snedecor distribution to analyze the significance of the effect of changes in the compression ratio of a diesel engine on the value of the specific enthalpy of the exhaust gas flow
    Autorzy:
    Puzdrowska, Patrycja
    Powiązania:
    https://bibliotekanauki.pl/articles/2097566.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    exhaust gas temperature
    Fisher-Snedecor decomposition F statistic
    diagnosis
    silnik Diesla
    temperatura spalin
    F-statystyka rozkładu Fishera-Snedecora
    diagnoza
    Opis:
    The paper discusses the impact of changes in the compression ratio on the operating parameters of a diesel engine, e.g. on the temperature of exhaust gases. It presents the construction of the laboratory test stand, on which experimental measurements were realized. It is characterized how the actual changes of the compression ratio were introduced to the existing engine. The program of experimental investigations taking into account the available test stand and measurement possibilities was described. A statistical and qualitative analysis of the obtained measurement results was made. The use of F statistics of the Fisher-Snedecor distribution was proposed to assess the significance of the effect of compression ratio changes on the specific enthalpy of the exhaust gas stream. The specific enthalpy of exhaust gases was analysed for one cycle of diesel engine work, determined on the basis of the course of quickly varying temperature of exhaust gases. The results of these analyses are discussed and the utilitarian purpose of this type of evaluation in parametric diagnostics of piston engines is presented.
    Źródło:
    Combustion Engines; 2021, 60, 3; 80--88
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concept of using the heat pipes in the heat exchanger of diesel engine exhaust system intended for use in potentially explosive atmospheres
    Autorzy:
    Lesiak, Krzysztof
    Brzeżański, Marek
    Prostański, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/133276.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    exhaust system
    heat exchanger
    heat pipes
    temperature of exhaust gases
    hard coal mining
    układ wydechowy
    wymiennik ciepła
    rurki cieplne
    temperatura spalin
    górnictwo węgla kamiennego
    Opis:
    Limiting the temperature of exhaust gases to below 150°C is one of the necessary conditions for diesel engine to be used in a potentially explosive atmosphere. For this purpose heat exchangers are necessary to be used. This article presents the concept of exchanger in which heat pipes are used to transport thermal energy from the exhaust gases to the cooling medium.
    Źródło:
    Combustion Engines; 2019, 58, 2; 127-131
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concept of the exhaust system of combustion engines used in underground mining
    Autorzy:
    Lesiak, K.
    Brzeżański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/134172.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    exhaust system
    temperature of exhaust gases
    CI combustion engine
    flame arrester
    hard coal mining
    układ odprowadzania spalin
    temperatura spalin
    silnik spalinowy o zapłonie samoczynnym
    urządzenie do odcinania płomienia w palniku
    kopalnia węgla kamiennego
    Opis:
    Analyses the problems occurring in the exploitation combustion engines used in mining have been presented in article. Design solutions used at present to protect the intake and exhaust systems of internal combustion engines operated in underground hard coal mines have been also described. A new design concept of exhaust system have been presented.
    Źródło:
    Combustion Engines; 2017, 56, 2; 97-100
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cold start emissions from a gasoline engine in RDE tests at different ambient temperatures
    Autorzy:
    Kurtyka, Karolina
    Pielecha, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/2097463.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    cold start
    RDE test
    exhaust emissions
    ambient temperature
    gasoline engine
    zimny rozruch
    test RDE
    emisja spalin
    temperatura otoczenia
    silnik benzynowy
    Opis:
    The implementation of the 3rd package of the RDE test procedure has extended the test method by considering emissions from a cold start period into the total exhaust emissions from a vehicle. The article presents the research results of exhaust emissions of a vehicle equipped with a gasoline engine. The tests were carried out at two different ambient temperatures, in line with the requirements of the RDE test procedure for passenger cars, meeting the Euro 6d-Temp emissions standard. The obtained results were analyzed, i.e. there were compared the engine and vehicle operating parameters and the values of road exhaust emissions during the cold start at two different ambient temperatures. The summary presents the shares of the cold start phase for each exhaust emission compound in the urban part of the test and the entire RDE test, depending on the ambient temperature (8ºC and 25ºC).
    Źródło:
    Combustion Engines; 2020, 59, 2; 24--30
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of flame temperature and soot amount for effective NOx and PM reduction in a heavy duty diesel engine
    Autorzy:
    Aoyagi, Yuzo
    Powiązania:
    https://bibliotekanauki.pl/articles/132846.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    Diesel engine
    exhaust emissions
    NOx
    PM
    EGR
    BSFC
    flame temperature
    two-color method
    video camera
    silnik Diesla
    emisje spalin
    temperatura płomienia
    metoda dwubarwowa
    kamera wideo
    Opis:
    To reduce exhaust NOx and smoke, it is important to measure flame temperature and soot amount in combustion chamber. In diesel combustion it is effective to use the two-color method for the measurement of the flame temperature and KL factor, which is related with soot concentration. The diesel flame was directly and continuously observed from the combustion chamber at running engine condition by using a bore scope and a high-speed video camera. The experimental single cylinder engine has 2.0-liter displacement and has the ability with up to five times of the boost pressure than the naturally aspirated engine by external super-charger. The devices of High Boost, Wide Range and High EGR rate at keeping a relatively high excess air ratio were installed in this research engine in order to reduce exhaust NOx emission without smoke deterioration from diesel engines. The video camera nac GX-1 was used in this study. From observed data under the changing EGR rates, the flame temperature and KL factor were obtained by the software of two-color method analysis. The diesel combustion processes are understood well by analyzing high-speed movies of the diesel flame motion and its temperature. The NOx and smoke are mutually related to maximum flame temperature and also it is possible to reduce simultaneously both NOx and soot emissions by high EGR rate in a single cylinder diesel engine.
    Źródło:
    Combustion Engines; 2019, 58, 4; 32-39
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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