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    Wyświetlanie 1-5 z 5
    Tytuł:
    Work study catalytic converter during starting a cold engine
    Autorzy:
    Koliński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/246716.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    engine start-up
    catalytic reactor
    Opis:
    The paper presents an analysis of the problems associated with the catalytic reduction of emissions in a diesel engine in cold start. The tests were performed at the station in the climate chamber at lowered ambient temperatures: -7, -15 and -20oC. A heated three-function platinum-palladium catalytic reactor with a metal monolith was used in the tests. The test methodology included a measurement of toxic fume concentraction upstream and downstream the catalytic reactor at simultaneous measurement of the start-up parameters and measurement of temperatures in selected engine and catalytic reactor locations. A period of the cold engine start-up is characterized by a relatively high carbon oxide and hydrocarbon emission. The level of that emissions increases, as the ambient temperature gets lower. As a result of the tests the influence of heating up the reactor on its operation during the self-ignition engine start-up was identified.Carbon oxide and hydrocarbon emission during the start-up period can be reduced by initial heating up the catalytic reactor before the start-up by means of an electric heater. When heating up the reactor surface up to 400oC at ambient temperature of -7oC, CO concentration can be reduced by 80...90% and the hydrocarbon concentration can be reduced by app. 70% on the average.
    Źródło:
    Journal of KONES; 2015, 22, 1; 157-166
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examinations of the influence of heating up the catalytic reactor on the toxic exhaust gases component emission during a cold start-up
    Autorzy:
    Koliński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/244128.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engines
    engine start-up
    emission
    catalytic reactor
    Opis:
    This article presents the results of the tests of catalytic reduction of carbon oxide and hydrocarbon emission during the self-ignition engine start-up. The tests were performed at the station in the climate chamber at lowered ambient temperatures: -7 ,-15 and -20 °C. A heated three-function platinum-palladium catalytic reactor with a metal monolith was used in the tests. The test methodology included a measurement of toxic exhaust gases concentration upstream and downstream the catalytic reactor at simultaneous measurement of the start-up parameters and measurement of temperatures in selected engine and catalytic reactor locations. A period of the cold engine start-up is characterized by a relatively high carbon oxide and hydrocarbon emission. The level of that emissions increases as the ambient temperature gets lower. As a result of the tests the influence of heating up the reactor on its operation during the self-ignition engine start-up was identified. Carbon oxide and hydrocarbon emission during the start-up period can be reduced by initial heating up the catalytic reactor before the start-up by means of an electric heater. When heating up the reactor surface up to 40°C at ambient temperature of-7°C, CO concentration can be reduced by 60...80% and the hydrocarbon concentration can be reduced by app. 60% on the average.
    Źródło:
    Journal of KONES; 2009, 16, 1; 255-264
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Researches of noxious components of exhaust gases conversion occurs in catalytic converter during a start-up of compression ignition engine in lowered temperature
    Autorzy:
    Koliński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/244570.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    engine start-up
    catalytic reactor
    testing station
    carbon
    hydrocarbon
    Opis:
    This article presents the results of the tests of catalytic reduction of carbon oxide and hydrocarbon emission during the self-ignition engine start-up. The tests were performed at the station in the climate chamber at lowered ambient temperatures: –7 ,-15 and –20 centigrade. A heated three-function platinum-palladium catalytic reactor with a metal monolith was used in the tests. The test methodology included a measurement of toxic fume concentraction upstream and downstream the catalytic reactor at simultaneous measurement of the start-up parameters and measurement of temperatures in selected engine and catalytic reactor locations. A period of the cold engine start-up is characterized by a relatively high carbon oxide and hydrocarbon emission. The level of that emissions increases as the ambient temperature gets lower. As a result of the tests the influence of heating up the reactor on its operation during the selfignition engine start-up was identified.Carbon oxide and hydrocarbon emission during the start-up period can be reduced by initial heating up the catalytic reactor before the start-up by means of an electric heater. When heating up the reactor surface up to 400 centigrade at ambient temperature of –7 centigrade, CO concentration can be reduced by 80...90 per cent and the hydrocarbon concentration can be reduced by app. 70 per cent on the average.
    Źródło:
    Journal of KONES; 2011, 18, 1; 253-262
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Start-up and acceleration control of the turbine engine with the detonation combustion chamber
    Autorzy:
    Balicki, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/247622.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    turbine engine
    combustion chamber
    rotating detonation engine (RDE)
    start-up control
    Opis:
    This article presents the results of tests of helicopter turbine engine, where the classic combustion chamber was replaced with an innovative solution. In this chamber instead of the classic combustion deflagration, was generated a rotating detonation. Theoretical considerations expected to get a higher engine efficiency, because as the thermodynamic Fickett-Jacobs cycle, which can describe the working principle turbine engine detonation chamber, has a higher efficiency than a Brayton cycle, according to which the engines of conventional chamber are working. The appearance of detonation combustion was diagnosed basing on observation of the gas pressure flue in the chamber, using piezoelectric sensors. Before the detonation chamber was used in turbine engine, a series of problems on the various methods of initiation of detonation process and the procedures for controlling the flow rate into the chamber of air and fuel were solved. There was a test stand constructed, which used a helicopter turbine engine GTD-350, wherein the jugs combustion chamber was replaced with detonation chamber. A control system for the flow of fuel in the combustion chamber was developed: aviation kerosene Jet-A1 with addition of hydrogen. With its use obtained unfailing starts of chamber, also the engine running on the idle and on the flight range and accelerations at idle range to flight range. The possibility of the detonation combustion for a long time, especially in transient states - practically limited only by the capacity of fuel tanks – is the achievement of the research team.
    Źródło:
    Journal of KONES; 2015, 22, 4; 21-27
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal parameters of engine systems operating during its heating after starting at low temperature
    Optymalne parametry pracy układów silnika podczas nagrzewania w niskiej temperaturze
    Autorzy:
    Pszczółkowski, J.
    Koliński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/243054.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    silniki spalinowe
    rozruch w niskiej temperaturze
    zadymienie spalin
    combustion engines
    start-up at low temperature
    smokiness of the exhaust gases
    Opis:
    The basic problem of combustion engine heating phase after its starting at low ambient temperature is emission of harmful for the environment exhaust gas components. Environment pollution by diesel engines is determined by exhaust gas smokiness which is measured using light extinction coefficient. Exhaust gas smokiness means outlet engine gas colouring by opaque components, absorbing or dissipating the light. As basic kinds of smoke, especially appearing at engine heating phase we can specify: white, black and blue smoke. There is made the analysis of methods of limitation the emission of harmful for the environment diesel engine exhaust gas components after its starting with special attention to possibilities of optimisation the operating parameters of some engine systems. There are presented the exhaust gas smokiness characteristics for the AD4.236 diesel engine during its heating as functions of chosen construction, adjustment and exploitation parameters. Before the smokiness measurement there was realised a starting attempt of the engine prepared according to the starting procedures standards. Exhaust gas smokiness was measured using absorption smokiness measuring instrument. There was made the identification of the factors causing engine smokiness under its warming-up: low temperature of fuel, lubricating oil, air, cylinder walls and there was pointed the possibility of harmful for the environment exhaust gas components emission limitation using thermostarts (or other means of engine start-up aiding).
    Podstawowym problemem fazy nagrzewania silników spalinowych po uruchomieniu w niskiej temperaturze otoczenia jest emisja szkodliwych dla środowiska składników spalin. Zanieczyszczenie środowiska przez silniki o zapłonie samoczynnym jest determinowane przez stopień zadymienia ich spalin, którego miarą jest współczynnik ekstynkcji światła. Zadymienie spalin oznacza zabarwienie gazów wylotowych silnika przez składniki nieprzezroczyste, pochłaniające lub rozpraszające światło. Jako podstawowe rodzaje dymu, występujące szczególnie w fazie nagrzewania silnika, wyróżnia się: dym biały, czarny i niebieski. Dokonano analizy metod ograniczenia emisji szkodliwych dla środowiska składników spalin silników o zapłonie samoczynnym po uruchomieniu, ze szczególnym uwzględnieniem możliwości optymalizacji parametrów pracy wybranych układów silnika. Przedstawiono charakterystyki zadymienia spalin silnika typu AD4.236 podczas nagrzewania w funkcji wybranych parametrów konstrukcyjnych, regulacyjnych i eksploatacyjnych. Przed pomiarem dymienia wykonywano próbę rozruchu silnika przygotowanego zgodnie z procedurami badań rozruchowych. Pomiaru poziomu zadymienia spalin dokonywano za pomocą dymomierza absorpcyjnego. Dokonano identyfikacji czynników powodujących dymienie silnika w fazie nagrzewania: niska temperatura paliwa, oleju smarującego, powietrza, ścian cylindrów i wskazano możliwość ograniczenia emisji szkodliwych składników spalin poprzez stosowanie świec płomieniowych (lub innych urządzeń wspomagania rozruchu).
    Źródło:
    Journal of KONES; 2007, 14, 2; 373-380
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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