Detecting power imbalance in multi-cylinder inline diesel engine generator set

Gawande, S. H.; Navale, L. G.; Nandgaonkar, Milankumar; Butala, D. S.

doi:10.1109/iccae.2010.5451963

Cited by 6 publications

(9 citation statements)

References 12 publications

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“…In this work, as per [1,6,14,15], detailed torsional vibration analysis was carried out and is used to calculate the torsional vibration amplitude for the given operating engine. The information in Table 1 pertains to the four-stroke, sixcylinder inline diesel engine.…”

Section: Resultsmentioning

confidence: 99%

“…It is observed that when the cylinders are uniformly contributing to the total engine torque, the first three harmonic orders (K = 0.5, 1, 1.5) play a significant role in the frequency spectrum of the total gas-pressure torque and, consequently, appear with a very low contribution in the frequency spectrum of the crankshaft's speed [5,6]. If the frequency spectrum of the crankshaft's speed corresponding to uniform cylinders operation is compared to the spectrum corresponding to a faulty cylinder, one may see that the major difference is produced by the amplitudes of the first three harmonic orders.…”

Section: Interpretation and Calculation Of Resultant Phase Vector Basmentioning

confidence: 99%

“…Balancing the cylinder-wise torque contributions of automotive and other high-speed engines is usually addressed by reconstructing the cylinder-wise netindicated torques, by direct use of the angular acceleration [4]. The method suggested [5,6], in which the measured angular speed was directly related to the nonuniform torque contribution to detect misfire. In order to determine the cylinder-wise net-indicated torque, the oscillating torque applied on the flywheel was reconstructed from measurements of the angular speeds of the crankshaft.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fault Detection of Inline Reciprocating Diesel Engine: A Mass and Gas-Torque Approach

Gawande¹,

Navale²,

Nandgaonkar³

et al. 2012

Advances in Acoustics and Vibration

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Early fault detection and diagnosis for medium-speed diesel engines are important to ensure reliable operation throughout the course of their service. This work presents an investigation of the diesel engine combustion-related fault detection capability of crankshaft torsional vibrations. Proposed methodology state the way of early fault detection in the operating six-cylinder diesel engine. The model of six cylinders DI Diesel engine is developed appropriately. As per the earlier work by the same author the torsional vibration amplitudes are used to superimpose the mass and gas torque. Further mass and gas torque analysis is used to detect fault in the operating engine. The DFT of the measured crankshaft's speed, under steady-state operating conditions at constant load shows significant variation of the amplitude of the lowest major harmonic order. This is valid both for uniform operating and faulty conditions and the lowest harmonic orders may be used to correlate its amplitude to the gas pressure torque and mass torque for a given engine. The amplitudes of the lowest harmonic orders (0.5, 1, and 1.5) of the gas pressure torque and mass torque are used to map the fault. A method capable to detect faulty cylinder of operating Kirloskar diesel engine of SL90 Engine-SL8800TA type is developed, based on the phases of the lowest three harmonic orders.

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Section: Resultsmentioning

confidence: 99%

Section: Interpretation and Calculation Of Resultant Phase Vector Basmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fault Detection of Inline Reciprocating Diesel Engine: A Mass and Gas-Torque Approach

Gawande¹,

Navale²,

Nandgaonkar³

et al. 2012

Advances in Acoustics and Vibration

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“…IAS technique allows not only fault detection but also identification of faulty cylinder. Charles et al [6] propose presenting the IAS waveform in polar coordinate form, Gawande et al [7] developed the technique based on analysis of the lowest three harmonics orders, and Desbazeille et al [5] presented the method of comparison of angular speed difference between healthy and faulty condition. The last one was used in our experiment.…”

Section: Introductionmentioning

confidence: 99%

Processing of Instantaneous Angular Speed Signal for Detection of a Diesel Engine Failure

Charchalis

Dereszewski

2013

Mathematical Problems in Engineering

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Continuous monitoring of diesel engine performance under its operating is critical for the prediction of malfunction development and subsequently functional failure detection. Analysis of instantaneous angular speed (IAS) of the crankshaft is considered as one of the nonintrusive and effective methods of the detection of combustion quality deterioration. In this paper results of experimental verification of fuel system's malfunction detecting, using optical encoder for IAS recording are presented. The implemented method relies on the comparison of measurement results, recorded under healthy and faulty conditions of the engine. Elaborated dynamic model of angular speed variations enables us to build templates of engine behavior. Recorded during experiment, values of cylinder pressure were taken for the approximation of pressure basic waveform. The main task of data processing is smoothing the raw angular speed signal. The noise is due to sensor mount vibrations, signal emitter machining, engine body vibrations, and crankshaft torsional vibrations. Smoothing of the measurement data was carried out by the implementation of the Savitzky-Golay filter. Measured signal after smoothing was compared with the model of IAS run.

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“…Convenience of that method is non-invasive measurement and relatively easy mounting of measurement system elements [3]. According to some authors, analysis of the lowest harmonics can even point the faulty cylinder [5]; other methods are focused on indicated torque. This work is dedicated to validation of IAS calculation basing on the engine dynamic model.…”

Section: Introductionmentioning

confidence: 99%

Model Based Prediction of the Crankshaft Instantaneous Angular Speed Fluctuations

Dereszewski¹,

Charchalis²

2013

Journal of KONES. Powertrain and Transport

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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.

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Detecting power imbalance in multi-cylinder inline diesel engine generator set

Cited by 6 publications

References 12 publications

Fault Detection of Inline Reciprocating Diesel Engine: A Mass and Gas-Torque Approach

Fault Detection of Inline Reciprocating Diesel Engine: A Mass and Gas-Torque Approach

Processing of Instantaneous Angular Speed Signal for Detection of a Diesel Engine Failure

Model Based Prediction of the Crankshaft Instantaneous Angular Speed Fluctuations

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