Temat: engine diagnosis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Assessment of the diagnostic suitability of net thermal efficiency of marine diesel engine
Autorzy:: Pawletko, R.
Polanowski, S.
Witkowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/247360.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: indicator diagram
thermal efficiency
diesel engine diagnosis
Opis:: This article applies to searching for symptoms and diagnostic parameters pointing in a deterioration in the quality of the combustion process in marine diesel engines. It was assumed that diagnostic parameters should give clear information regardless of engine load or with respect to the mean indicated pressure. The proposed cycle and sectional net thermal (heat) efficiency characteristics and also dimensionless net heat release rate were analysed. In order to obtain the state of deterioration of the injection process simulation of discalibration (larger diameter) of injector holes was performed. The simulation was carried out by the enlarged of diameter of the injector holes form 0.375 mm to 0.385 mm. Deterioration of the formation and growth of fuel spray droplet diameter is result of such simulation. The study was conducted on a laboratory engine Sulzer Al25/30. The study was carried out according to active experiment plan, during which the selected engine failure of the injection system was simulated. Measurements of pressure of combustion were performed by means of tensometric sensors of Spice Company on the indicator valve. The analysis found that in the event of injector nozzle faults (discalibrated holes) significantly decreases the net thermal efficiency η c cycle, and there are significant oscillations of net
Źródło:: Journal of KONES; 2013, 20, 4; 327-332
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of clogged injector nozzles on the heat release characteristics
Autorzy:: Pawletko, R.
Polanowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/243678.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: indicator diagram
heat release characteristics
marine diesel engine diagnosis
Opis:: The paper presents the results of research of the influence of clogged injector nozzles in fuel injection system on the shape of heat release characteristics. The study was conducted on a laboratory four-stroke marine engine, type Sulzer 3Al 25/30, with nominal power Ne = 408 kW at nominal rotational speed n = 750 rpm. The study was carried out according to active experiment plan, during which the engine failure of the injection system was simulated. Simulation of loss of patency of injector nozzles (clogged) was to completely clog two holes of nine injection injector nozzle holes with a diameter of 0,325 mm. Measurements were made at a constant engine speed of 750 rev/min for five loads: 50, 100, 150, 200, 250 kW. Measurements of pressure of combustion were performed by means of tensometric sensors of Spice Company. Based on measured pressure curves heat release characteristics were determined. The algorithm allows the determination of net heat release rate q and the net generated heat Q characteristics. Based on the obtained results it can be concluded that significant improvement in the diagnostic use of indicator diagrams can be obtained by using heat release characteristics. These characteristics are correlated with the process of fuel injection and the injection pump operation. As demonstrated in the work of analysing the heat release rate q, it is possible to infer diagnosis on the technical condition of the fuel injection system.
Źródło:: Journal of KONES; 2013, 20, 3; 307-314
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Knowledge management system for marine diesel engine diagnosis
Autorzy:: Charchalis, A.
Pawletko, R.
Powiązania:: https://bibliotekanauki.pl/articles/242163.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: knowledge management system
diagnostic expert system
marine diesel engine diagnosis
Opis:: The paper presents the conception of knowledge management system for a diagnostic expert system. Development of knowledge management system is necessary during the construction of the expert system. The most important reason is that knowledge in this system is not a static whole, but is subject to dynamic growth, is modified and updated. Advantages afforded by the creation of diagnostic systems based on knowledge, such as expert systems, compared to traditional diagnostic systems based on closed algorithms were characterized. The conception of knowledge management system established in the diagnostic work associated with the development of expert system for marine diesel engine diagnosis. The main elements of the developed management system are: dictionary editor, rule editor, knowledge assessment module and import and export module. Knowledge management system is also equipped with an electronic form that is used to obtain knowledge from experts, specialists in diesel engines operation. The article presents the tasks and the performance of individual components of the system. The knowledge management system enables integration within a single frame of both information collected from experts and automatically collected one. A doubtless advantage of expert system is the opportunity of updating and developing the content recorded in the database. Due to this feature, the effectiveness of the system may grow during engine operation and facilitate gaining new experience.
Źródło:: Journal of KONES; 2011, 18, 2; 77-83
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The possibility of fuel injection pump diagnosis on the basis of indicator diagram
Autorzy:: Pawletko, R.
Powiązania:: https://bibliotekanauki.pl/articles/246551.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: indicator diagram
heat release characteristics
marine diesel engine diagnosis
fuel pump leakage
Opis:: The paper presents the results research related to the possibility of fuel injection pump diagnosis on the basis of indicator diagram. The study was conducted on a laboratory four-stroke marine engine, type Sulzer 3Al 25/30, with nominal power Nen = 408 kW at nominal rotational speed n = 750 rpm. The study was carried out according to active experiment plan, during which the engine failure of the injection system was simulated. Simulation of fuel pump leakage was completed by the opening of the adjusting screw on the pump discharge. Measurements were made at a constant engine speed of 750 rev/min for five loads: 50, 100, 150, 200, 250 kW. Measurements of pressure of combustion were performed by means of tensometric sensors of Spice Company. Based on measured pressure curves heat release characteristics were determined. The algorithm allows the determination of net heat release rate q and the net generated heat Q characteristics. Based on the obtained results it can be concluded that significant improvement in the diagnostic use of indicator diagrams can be obtained by using heat release characteristics. These characteristics are correlated with the process of fuel injection and the injection pump operation. As demonstrated in the work of analyzing the heat release rate q, it is possible to infer diagnosis on the technical condition of the fuel injection system.
Źródło:: Journal of KONES; 2014, 21, 1; 215-221
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Engine diagnosis based on vibration analysis using different fuel blends
Autorzy:: Grajales, J. A.
Quintero, H. F.
López, J. F.
Romero, C. A.
Henao, E.
Cardona, O.
Powiązania:: https://bibliotekanauki.pl/articles/328420.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: engine diagnosis
vibration analysis
frequency analysis
diagnostyka silnika
analiza drgań
analiza częstotliwościowa
Opis:: Fault diagnosis of an internal combustion engine is proposed herein by means of vibration analysis and a comparative analysis of normal operation and induced misfire scenarios. In order to validate previous works on misfire with pure gasoline, measurements also included tests performed with ethanol-gasoline fuel blends. According to results, changes in the fuel mix seem to have little impact on the performance and behaviour of the engine. And additionally, the particular frequency components that allowed differentiation between normal and faulty conditions were also present on all the fuel blends tested. Fast Fourier Transform was applied to obtain the frequency domain of the signal as a previous step to the subsequent identification process based on statistical characteristics extraction. A fuel blend classification method based on the analysis of the vibration signals of the engine was studied using envelope, Spike Energy and Peak Value techniques. Differentiation was possible with the extraction of the statistical features of the Peak Value spectrum of the longitudinal acceleration with a specific filter selection.
Źródło:: Diagnostyka; 2017, 18, 4; 27-36
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: A methodology for non-invasive diagnosis of diesel engines through characteristics of starter system performance
Autorzy:: Ramírez, Juan D.
Romero, Carlos A.
Mejía, Juan C.
Quintero, Héctor F.
Powiązania:: https://bibliotekanauki.pl/articles/2096186.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: internal combustion engines
engine diagnosis
starting system
starting process
silniki spalinowe
diagnozowanie silników
układ rozruchowy
Opis:: In this work, a methodology to diagnose ten diesel bus engines is carried out by means of some characteristics of the starting system performance. The signals of battery voltage, electric current supplied to the starter motor and crankshaft revolutions during cold and warm engine starting processes are analysed. Characteristics and patterns of the signals that are attributable to engine compression and combustion failures are pointed out, which are related to the kilometres travelled by each vehicle after the last engine repair and the shutdown time of the engine in warm condition. It is obtained that the rise of the current required by the starter motor during the second and third compression process, and the mean crankshaft angular acceleration after the second compression process are characteristics that are related to the engine condition.
Źródło:: Diagnostyka; 2022, 23, 2; art. no. 2022202
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Influence of pressure sensor location on the quality of thermodynamic parameters calculated from the marine engine indicator diagram
Wpływ lokalizacji czujnika ciśnienia na dokładność wyznaczania parametrów termodynamicznych w oparciu o wykres indykatorowy silnika okrętowego
Autorzy:: Polanowski, S.
Pawletko, R.
Witkowski, K
Powiązania:: https://bibliotekanauki.pl/articles/133303.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: indicator diagram
heat release characteristics
marine diesel engine diagnosis
wykres indykatorowy
charakterystyki wydzielania ciepła
diagnozowanie silników okrętowych
Opis:: A major problem for the diagnostic use of the indicator diagram is the pressure sensor location. Indicator channel and valve may bring in significant distortions in the resulting pressure. The paper presents results of research conducted on the medium speed laboratory engine Al 25/30. Indication was made by the sensor placed directly in the cylinder (instead of starting air valve), before the indicator valve (with special Kistler adapter) and on the indicator valve. During the research the course of heat release rate q and the heat released Q were determined. Distortion of heat release characteristics for the sensor placed in the indicator valve is important, but it is estimated that diagnostic information is not lost. Influence of the pressure sensor location can be significantly reduced by proper adjustment of the TDC position.
Jednym z głównych problemów diagnostycznego wykorzystania wykresów indykatorowych jest miejsce umieszczenia czujnika ciśnienia. Kanały oraz zawory indykatorowe są źródłem istotnych zakłóceń pomiarowych. W artykule przedstawiono wyniki badań dotyczących miejsca zamocowania czujnika ciśnienia spalania na silniku laboratoryjnym Sulzer Al25/30. Czujniki ciśnienia zostały umieszczony bezpośrednio w cylindrze (w miejsce zaworu startowego), przed zaworem indykatorowym oraz na zaworze indykatorowym. Oprócz podstawowych parametrów indykowanych na podstawie wykresów indykatorowych wyznaczono przebieg charakterystyk prędkości wydzielania ciepła oraz ciepła wydzielonego. Na podstawie uzyskanych wyników badań stwierdzono, że kanały gazowe silników średnioobrotowych wnoszą znaczące opóźnienia sygnałów ciśnienia i deformacje wykresów indykatorowych, jednak możliwe jest w dalszym ciągu ich diagnostyczne wykorzystanie. Wpływ lokalizacji czujnika ciśnienia może być istotnie zmniejszony poprzez prawidłową korektę położenia GMP.
Źródło:: Combustion Engines; 2013, 52, 3; 319-323
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Influence of fuel injection system faults of marine diesel engine on the heat release characteristics
Wpływ uszkodzeń układu wtryskowego okrętowego silnika tłokowego na przebieg charakterystyk wydzielania ciepła
Autorzy:: Pawletko, R.
Polanowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/133941.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: indicator diagram
heat release characteristics
marine diesel engine diagnosis
wykres indykatorowy
charakterystyki wydzielania ciepła
diagnozowanie silników okrętowych
Opis:: The paper presents the results of research of the influence of chosen marine diesel engine fuel injection system faults on the shape of heat release characteristics. The study was conducted on a laboratory engine Sulzer Al25/30. The study was carried out according to active experiment plan, during which the selected engine failure of the injection system were simulated. Measurements of pressure of combustion were performed by means of tensometric sensors of Spice Company. Based on measured pressure curves heat release characteristics were determined. The algorithm allows the determination of heat release rate q and the generated heat Q characteristics. Based on the obtained results it can be concluded that significant improvement in the diagnostic use of indicator diagrams can be obtained by using heat release characteristics. These characteristics are correlated with the process of fuel injection and the injection pump operation. As demonstrated in the work of analyzing the heat release rate q, it is possible to infer diagnosis on the technical condition of the fuel injection system.
W artykule przedstawiono wyniki badań wpływu wybranych uszkodzeń układu wtryskowego silnika okrętowego na przebieg charakterystyk wydzielania ciepła. Badania przeprowadzono na laboratoryjnym silniku Sulzer typu Al25/30. Doświadczenie zrealizowano zgodnie z planem eksperymentu czynnego, podczas którego symulowano wybrane uszkodzenia układu wtryskowego. Indykowanie silnika wykonano za pomocą tensometrycznych czujników spalania firmy Spice. Wykorzystując uzyskane wykresy indykatorowe wyznaczono charakterystyki wydzielania ciepła. Zastosowania algorytmy umożliwia obliczenia szybkości wydzielania ciepła q oraz ciepła wydzielonego Q. W oparciu o uzyskane wyniki badań można stwierdzić, zastosowanie charakterystyk wydzielania ciepła, może w sposób istotny wpłynąć na podatność diagnostyczną wykresów indykatorowych. Potwierdzono istotną korelację pomiędzy działaniem układu wtryskowego a przebiegiem tych charakterystyk. W oparciu o uzyskane przebiegi szybkości wydzielania ciepła, możliwe diagnozowania badanych uszkodzeń układu wtryskowego.
Źródło:: Combustion Engines; 2013, 52, 3; 314-318
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The possibilities of early fault detection of engines
Autorzy:: Filipczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/244750.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: fault diagnosis
faults of engine
Opis:: The results of investigation of 1,9 TDI engine (285 Nm, 85 kW, type AJM without any modification) equipped with injection units supplied conventional diesel fuel (ON) or B100 fuel (RME) have been presented in article. Investigations have been realized at the engine speed of 2000 rpm and variable load within the range of 0 to 275 Nm. The pressure, temperature and heat release velocity runs have been subjected to analysis. Particular attention has been paid to the release of the heat used for the effective work and internal energy increase of the working medium (enthalpy) during combustion inside the engine cylinder versus the crank angle for both investigated fuels. It was found among the others that mentioned fuels differ in the heat release, heat velocity and the maximal combustion temperature, which for the B100 fuel is bigger than for the conventional diesel fuel. Bigger combustion dynamics of tested biofuel (compared with standard diesel fuel) results higher concentrations of Nitrogen Oxides NOx in exhaust gases. The easiest way is of course the use of the later start of fuel injection biofuels and/or increase the exhaust gas recirculation EGR. These treatments, however, result in a worsening of the energy performance of the engine. It was concluded also that the combustion of RME works properly at higher engine loads. Then reduce the negative difference between the combustion of biofuel (RME) and standard Diesel fuel.
Źródło:: Journal of KONES; 2013, 20, 4; 79-84
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The identification of piston-cylinder clearance using time-frequency methods
Autorzy:: Flekiewicz, M.
Fabiś, P.
Madej, H.
Powiązania:: https://bibliotekanauki.pl/articles/245755.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: fault diagnosis
engine vibration
Gabor Spectrogram
Adaptive Spectrogram
Opis:: A fault recognition technique for the internal combustion engines using time-frequency representations of vibration signal has been presented in this paper. Engine block vibration results as a sum of many excitations mainly connected with engine speed and their intensity increases with the appearance of a fault or in case ofhigher engine elements wearing. In this paper an application of acceleration signals for the estimation of the influence of piston skirt clearance on diesel engine block vibrations has been described. Engine body accelerations registered for three simulated cases representing piston skirt clearance variations were an object of preliminary analysis. The presented procedures were applied to vibration and pressure signals acquired for a 0.5 dm3 Ruggerini, air cooled diesel engine. reciprocating machines are difficult to diagnose using traditional frequency domain techniques due to the fact they generale transient vibrations. In the experiments that were conducted Gabor Analysis and Adaptive Spectrogram has been chosen The Gabor spectrogram is a powerful tool for on-line monitoring and diagnosis of combustion process. There are important features of the vibration signal that are sensitive to the change of IC engine condition. For that reason the DWT transform was applied. Based on the results, authors propose detection and piston skirt clearance monitoring algorithm.
Źródło:: Journal of KONES; 2009, 16, 4; 93-103
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Research on intelligent diagnosis method for large-scale ship engine fault in non-deterministic environment
Autorzy:: Feng, D.
Li, Y.
Powiązania:: https://bibliotekanauki.pl/articles/258452.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: non-determinism
large-scale ship engine
fault intelligent diagnosis
Opis:: Aiming at the problem of inaccurate and time-consuming of the fault diagnosis method for large-scale ship engine, an intelligent diagnosis method for large-scale ship engine fault in non-deterministic environment based on neural network is proposed. First, the possible fault of the engine was analyzed, and the downtime fault of large-scale ship engine and the main fault mode were identified. On this basis, the fault diagnosis model for large-scale ship engine based on neural network is established, and the intelligent diagnosis of engine fault is completed. The experiment proved that the proposed method has high diagnostic accuracy, engine fault diagnosis takes only about 3s, with a higher use value.
Źródło:: Polish Maritime Research; 2017, S 3; 200-206
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Application of the pressure process detector for diagnosing injection apparatus in marine diesel engines in the injection pipe
Zastosowanie detektora przebiegu ciśnienia w przewodzie wtryskowym do diagnozowania aparatury wtryskowej silników okrętowych
Autorzy:: Monieta, J.
Kroczyński, K.
Powiązania:: https://bibliotekanauki.pl/articles/327272.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: silnik okrętowy
wtryskiwacz
diagnozowanie
marine diesel engine
injector
diagnosis
Opis:: The paper includes results of the preliminary research of the application of the pressure process detector for diagnosing injection apparatus in marine diesel engines in the injection channel during exploitation without its dismantling. The research was conducted on the marine auxiliary engine and on injection analysis probe for shipping engines, which are situated in the Laboratory of the Ship Power Plant at Maritime Academy of Szczecin. The aim of the research was to select symptoms of the fuel vibration signal in the fuel channel with the use of the pressure detector in a way that the signal is the reflection of the technical condition of the injection apparatus.
Referat zawiera wyniki badań wstępnych zastosowania detektora przebiegu ciśnienia w przewodzie wtryskowym do diagnozowania aparatury wtryskowej silników okrętowych w czasie eksploatacji bez jej demontażu. Badania zostały przeprowadzone dla okrętowego silnika pomocniczego, oraz wykorzystaniem próbnika do badań wtryskiwaczy silników okrętowych, znajdującym się w Laboratorium Siłowni Okrętowych Akademii Morskiej w Szczecinie. Celem było wyselekcjonowanie symptomu sygnału drgań paliwa w przewodzie paliwowym za pomocą czujnika ciśnienia tak, by był on odzwierciedleniem stanu technicznego aparatury wtryskowej. Badania wykazały, że niektóre parametry zarejestrowanych drgań w przewodzie wtryskowym mogą służyć do oceny stanu technicznego aparatury wtryskowej.
Źródło:: Diagnostyka; 2009, 4(52); 51-54
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: An algorithm for diagnosing injection systems of marine engines
Autorzy:: Bejger, Artur
Drzewieniecki, Jan
Powiązania:: https://bibliotekanauki.pl/articles/27315912.pdf
Data publikacji:: 2018
Wydawca:: STE GROUP
Tematy:: diesel engine
injection system
diagnosis
acoustic emission
elastic waves
Opis:: The article presents the developed methods for diagnosing and analysing signals from injection systems of marine engines. As a source signal, the authors use elastic waves of acoustic emission. The essential fact in the case here considered is that the high frequency of signal from working elements of the injection system comes from a close source directly related to the change of the working parameters of the element (system). Characteristically for elastic waves of acoustic emission, low frequencies (e.g. those from other sources, such as machines in the engine room) are in this case attenuated. Therefore, the proper selection of the method for the analysis allows us accurately diagnose the injection system of a working engine.
Źródło:: New Trends in Production Engineering; 2018, 1, 1; 227--233
2545-2843
Pojawia się w:: New Trends in Production Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Recovery of impact signatures in diesel engine using wavelet packet transform (WPT)
Wykrywanie wymuszeń impulsowych w silniku ZS za pomocą pakietów falkowych (WPT)
Autorzy:: Flekiewicz, M.
Madej, H.
Powiązania:: https://bibliotekanauki.pl/articles/329184.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: diagnostyka uszkodzeń
silnik spalinowy
drgania
WPT
fault diagnosis
engine vibration
Opis:: A fault diagnosis technique for internal combustion engines using time-scale representations of vibration signal is presented in this paper. Engine block vibration results as a sum of many excitations mainly connected with engine speed and their intensity increases with the appearance of a fault or in case of higher engine elements wearing. In this paper an application of acceleration signals for the estimation of the influence of piston skirt clearance on diesel engine block vibrations has been described. Engine body accelerations registered for three simulated cases representing piston skirt clearance variations were an object of preliminary analysis. The presented procedures were applied to vibration and pressure signals acquired for a 0.5 dm3 Ruggerini, air cooled diesel engine. Reciprocating machines are difficult to diagnose using traditional frequency domain techniques because of generate transient vibration. In conducted experiments WPT has been chosen as the decomposition tool for feature extraction as a tool providing a flexible time-frequency resolution and a rich library of redundant wavelet bases.
W artykule przedstawiono wyniki badań diagnostycznych silnika ZS za pomocą analizy czasowo-częstotliwościowej. Drgania bloku i głowicy badanego silnika są spowodowane wieloma wymuszeniami związanymi z jego prędkością obrotową a ich intensywność wzrasta wraz z pojawianiem się uszkodzeń mechanicznych, zużycia eksploatacyjnego oraz występowania anomalii w procesie spalania. Sygnały przyspieszeń drgań wykorzystano do określenia wpływu stanu symulowanego luzu w złożeniu tłok cylinder. W ramach badań silnika ZS, chłodzonego powietrzem o pojemności 0,5 dm3 firmy Ruggerini zasymulowano trzy wartości luzu. Ze względu na fakt, że silniki spalinowe są złożonymi obiektami diagnozowania wykorzystanie tradycyjnych metod analizy częstotliwościowej nie zapewnia precyzyjnej identyfikacji charakterystycznych wymuszeń. W prowadzonych badaniach przeprowadzono dekompozycję sygnału drganiowego za pomocą pakietów falkowych (WPT).
Źródło:: Diagnostyka; 2007, 4(44); 25-30
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Estimation of combustion process in cylinders of diesel engine based on its working achievements
Autorzy:: Roslanowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/246394.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: stochastic process of engine operation
energy transformation
periodogram of engine operation
diagnosis of heat generating process in engine cylinder
Opis:: Elements of Modern ships' main combustion driven engines are subject to immense heat and mechanical loads. It is therefore advisable to supervise the regularity of heat generation in engine 's cylinder s. In order to diagnose the process of heat generation in engine's cylinder s, this article propagates the use of momentmetre. Described method allows estimating faulty combustion on the basis of autocorrelation of moment temporary values on the shaft after three successive rotations. The paper brings to attention how the work of diesel engine may be usedfor estimation of combustion process correctness in this engine cylinder. The work of diesel engine is connected with transfer of effective energy to ship propeller during its operation. Due to accidental naturę of combustion inside engine cylinder s it stochastic internally stationary process. To say more it is stochastic internally stationary process with ergodic feature. It makes possible to describe expected engine work by means of stochastic second order characteristics. They are autocorrelation functions and spectrum density of self power functions depending on time and frequency. Both above mentioned functions are uniquely connected with combustion in engine cylinders and it is possible to estimate the correctness of engine operation. It is also possible to estimate if the work of engine in given sail conditions is equal to reguirements of imposed tasks. If this reguirement is not met in the case of one propeller ship it can lead to the loss of ship stability and as a result can cause the ship sink.
Źródło:: Journal of KONES; 2010, 17, 2; 409-415
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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