Identification of damages in the inlet air duct of a diesel engine based on exhaust gas temperature measurements
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Faculty of Ocean Engineering & Ship Technology, Gdansk University of Technology.
Publication date: 2019-05-01
Combustion Engines 2019,177(2), 108–114
The temperature of the exhaust gas of a diesel piston engine, measured in the characteristic control sections of its thermo-flow system, can be a valuable source of diagnostic information about the technical condition of the elements limiting the working spaces thus separated, including the turbocharging system, but also its fuel supply system and replacement of the medium. In standard marine engine measurement systems equipped with an impulse turbocharging system, the exhaust gas temperature is measured at the outlet of individual cylinders and before and after the turbocharger turbine, using traditional thermocouples with high measurement inertia (time constant of tenths of a second and more). This means that for further diagnostic analyses, the average value of the periodically changing temperature of the exhaust stream leaving individual engine cylinders, the exhaust stream in the collective duct feeding the turbine and the exhaust stream in the exhaust duct of the turbine is used. This article proposes a new approach to the issue of diagnostic informationiveness of the exhaust gas temperature of a diesel engine, extending its observations with the dynamics of changes in the duration of one working cycle. The aim of the tests carried out on the laboratory stand of Farymann Diesel engine type D10 was to determine the diagnostic relations between the loss of permeability of the inlet air channel filter baffle and selected standards of the quick-changing signal of the exhaust gas temperature. On the basis of the calculations carried out, the following dynamic features of the recorded signal were determined: maximum amplitude of instantaneous exhaust gas temperature values (peak-to-peak value), its rate of increase and decrease, and the specific enthalpy of exhaust gases within one engine work cycle. Comparative analysis of numerical data characterizing the recorded quick-changing exhaust gas temperature courses clearly indicates obvious thermodynamic and energy consequences of partial loss of flow capacity of the air channel supplying the combustion chamber of the test engine. A further development of the experimental test programme is foreseen in order to determine a diagnostic matrix to support the diagnostic inference about the technical condition of the diesel engine on the basis of measurements and analysis of the quick-changing exhaust gas temperature.
BROWN, C., KEE, R.J., IRWIN, G.W. et al. Identification applied to dual sensor transient temperature measurement. UKACC Int. Control Conference. Manchester 2008.
JAREMKIEWICZ, M. Odwrotne zagadnienia wymiany ciepła, występujące w pomiarach nieustalonej temperatury płynów. Rozprawa doktorska. Wydawnictwo Politechniki Krakowskiej. Kraków 2011.
JAREMKIEWICZ, M., TALER, J. Inverse determination of transient fluid temperature in pipelines. Journal of Power Technologies. 2016, 96(6), 385-389.
KORCZEWSKI, Z. Badania efektywności energetycznej nowo produkowanych paliw żeglugowych z zastosowaniem silnika diesla. Journal of Polish CIMEEAC. 13, 1(5), 53-64.
KORCZEWSKI, Z. Exhaust gas temperature measurements in diagnostics of turbocharged marine internal combustion engines. Part I. Standard Measurements. Polish Maritime Research. 2015, 22/1(85), 47-54.
KORCZEWSKI, Z. Exhaust gas temperature measurements in diagnostics of turbocharged marine internal combustion engines. Part II. Dynamic Measurements. Polish Maritime Research. 23/1(89), 68-76.
KORCZEWSKI, Z. Diagnostyka eksploatacyjna okrętowych silników spalinowych – tłokowych i turbinowych. Wybrane zagadnienia. Wyd. Politechniki Gdańskiej. Gdańsk 2017.
KORCZEWSKI, Z. The method of energy-efficiency investigations of the newly produced marine fuels through the application of a diesel engine. Materiały Konferencji MAPE, Explo-Ship 2018. Zawiercie.
KORCZEWSKI, Z., PUZDROWSKA, P. Analytical method of determining dynamic properties of thermocouples used in measurements of quick – changing temperatures of exhaust gases in marine diesel engines. Combustion Engines. 2015, 162(3), 300-306.
KORCZEWSKI, Z., ZACHAREWICZ, M. Alternative diagnostic method applied on marine diesel engines having limited monitoring susceptibility. Transactions of the Institute of Measurement and Control. 2012, 34(8), 937-946.
KORCZEWSKI, Z., ZACHAREWICZ, M. Diagnostyka symulacyjna układu turbodoładowania okrętowego tłokowego silnika spalinowego. Zeszyty Naukowe Akademii Marynarki Wojennej. 2007, 2(169).
KOWALSKI, J., Laboratory study on influence of air duct throttling on exhaust gas composition in marine four-stroke diesel engine, Journal of KONES. 2015, 19(1), 191-198.
KOWALSKI, J. The emission and combustion characteristics of marine diesel engine with extreme throttled of air or exhaust ducts. New Trends in Production Engineering. 2018, 1(1), 427-433.
MARSZAŁKOWSKI, K., PUZDROWSKA, P. A laboratory stand for the analysis of dynamic properties of thermocouples. Journal of Polish CIMEEAC. 2015, 10(1), 111-120.
OLCZYK, A. Koncepcja pomiaru szybkozmiennej temperatury gazu z uwzględnieniem dynamicznej składowej emperatury. Pomiary Automatyka Kontrola. 2007, 53/9, 576-579.
PUZDROWSKA, P. Determining the time constant using two methods and defining the thermocouple response to sine excitation of gas temperature. Journal of Polish CIMEEAC. 2016, 11(1), 157-167.
PUZDROWSKA, P. Metoda wyznaczania stałej czasowej termopary na podstawie pomiaru szybkozmiennej temperatury spalin wylotowych silnika o ZS. Zeszyty Naukowe Akademii Morskiej w Gdyni. 2018, 108, 115-133.
PUZDROWSKA, P. Signal filtering method of the quickvarying diesel exhaust gas temperature. Combustion Engines. 2018, 175(4), 48-52.
RUDNICKI, J., PUZDROWSKA, P., MARSZAŁKOWSKI, K. Osłona termopary chłodzona wodą jako narzędzie zapobiegające zakłóceniom zewnętrznym podczas pomiarów temperatur szybkozmiennych spalin w kanale wylotowym silnika okrętowego. Journal of Polish CIMAC. 2017, 12(1), 97-104.
ZACHAREWICZ, M. Metoda diagnozowania przestrzeni roboczych silnika okrętowego na podstawie parametrów procesów gazodynamicznych w kanale zasilającym turbosprężarkę. Rozprawa doktorska. AMW, Gdynia 2009.