Model based prediction of the crankshaft instantaneous angular speed fluctuations

• Autorzy: Dereszewski M. , Charchalis A.
• Języki publikacji: EN

Abstrakty

EN

The paper presents results of the calculation, based on simplified engine model, aimed on prediction of IAS (Instantaneous Angular Speed) of the crankshaft fluctuations under faulty engine condition. Gas forces were calculated basing on results of in-cylinder pressure measurements which were used as inputs to the dynamic model. Mass forces were calculated basing on technical particulars of the engine Sulzer 3Al 25/30.Measurements of the incylinder pressure was carried out at laboratory stand in Gdynia Maritime University, equipped with diesel engine Sulzer 3AL 25/30 driving electro-generator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 408 kW at 750 rpm. In order to evaluate of IAS model utility for diagnostic prediction of the engine behavior, two kinds of malfunctions of engine’s fuel system were simulated. First malfunction was fuel leakage from high pressure line; the second was partly plugged injector’s nozzle. Construction of high pressure fuel pump enable to fuel leakage simulation. The engine was run out at load 250 kW what is around 65% of nominal. Results of all measurement were smoothed in order to eliminate a noise using SG (Savitzky – Golay) filter. Results of fault condition modeling were compared with healthy engine model and with results of in -cylinder pressure diagrams, in order to create a map of deviations from normal condition.

Słowa kluczowe

EN

diagnostics; marine diesel engine; angular speed modeling; failure symptoms

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 1
• Strony: 55--61
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Dereszewski M.

• Gdynia Maritime University, Mechanical Faculty Morska Street 83, 81-225 Gdynia, Poland tel.: [phone]

autor

Charchalis A.

• Gdynia Maritime University, Mechanical Faculty Morska Street 83, 81-225 Gdynia, Poland tel.: [phone]

Bibliografia

• [1] Polanowski, S., Studium metod analizy wykresów indykatorowych w aspekcie diagnostyki silników okr􀄊towych, Zeszyty Naukowe AMW Nr 169 A, 2007.
• [2] Desbazeille, M, Randall, R. B., Guillet, F., El Badaoui, M., Hoisnard, C., Model-based diagnosis of large diesel engines based on angular speed variations of the crankshaft, Mechanical Systems and Signal Processing 24, 2010.
• [3] Dereszewski, M., Charchalis, A., Polanowski, S., Analysis of diagnostic utility of instantaneous angular speed of a sea going vessel propulsion shaft, Journal of KONES, Vol. 18, No. 1, 2011.
• [4] Jędrzejowski, J, Obliczanie tłokowego silnika spalinowego, Wydawnictwa Naukowo- Techniczne, Warszawa 1984.
• [5] Gawande, S. H, Navale, L. G., Nandgaonkar, M. R., Butala, D. S, Kunamalla S., Detecting Power Imbalance in Multi-Cylinder Inline Diesel Engine Genset, Journal of Electronic Science and Technology, Vol. 8 No. 3, September 2010.