Investigation into the Vibrational Responses of Cylinder Liners in an IC Engine Fueled with Biodiesel

Li, Guoxing; Gu, Fengshou; Wang, Tie; You, Jianjun; Ball, Andrew

doi:10.3390/app7070717

Cited by 16 publications

(8 citation statements)

References 20 publications

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“…has not yet broken through, the core problem has not been solved, as the most widely used lithiumion battery composition after the energy density is only 80wh/kg, the power supply system Performance is relatively backward [14].…”

Section: Methodsmentioning

confidence: 99%

Comparison of CO2 Emission between Methanol and Gasoline Internal Combustion Engine

Wang

2023

JENRR

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The internal combustion engine, as a huge amount of global thermal machinery, serves a wide range of industries. At the present stage, internal combustion engines will still play an irreplaceable role for a longer period of time. Taking into account the trend of CO2 emissions in China in recent years, this paper briefly analyzes the impact of adopting methanol fuel and traditional gasoline fuel on carbon emissions. The results show that the reasonable optimization of vehicle energy structure is very important to realize energy saving and emission reduction and reduce atmospheric CO2 compared with traditional fuel vehicles.

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Section: Methodsmentioning

confidence: 99%

Comparison of CO2 Emission between Methanol and Gasoline Internal Combustion Engine

Wang

2023

JENRR

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“…Furthermore, as Chittenden and Priest [5] pointed out, a significant deformation of the cylinder liner induced by combustion force can only be observed in those heavy-duty diesel engines with thin-walled wet liners. According to the simulation results obtained by Li and Gu [7][8][9], the amplitude of liner deformations induced by piston slaps is at the order of 0.1 microns, being about 20% of the roughness amplitude and able to affect the distribution of oil film and its subsequent lubrication performance.…”

Section: ϕ R(ϕ)mentioning

confidence: 97%

“…Thus, it is a more feasible solution to obtain the dynamic deformation of cylinder liner through modelling and simulation. In the authors' previous paper [8,9], the surface deformation of cylinder liners has been obtained based on a validated finite element (FE) model, and the rationality of the simulation scheme has been verified by comparison with a series of experimental data. Based on the validated model, this paper simulates the deformation response of the cylinder liner to piston slaps, and extracts the surface deformation from the finite element simulation result through series conversion operation and introduces it into the lubrication model.…”

Section: Establishment Of Dynamic Modelmentioning

confidence: 99%

An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations

Wang

et al. 2017

Energies

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Abstract:The friction pair of piston rings and cylinder liner is one of the most important friction couplings in an internal combustion engine. It influences engine efficiency and service life. Under the excitation of piston slaps, the dynamic deformation of cylinder liner is close to the surface roughness magnitudes, which can affect the friction and lubrication performance between the piston rings and cylinder assemblies. To investigate the potential influences of structural deformations to tribological behaviours of cylinder assemblies, the dynamic deformation of the inner surface due to pistons slaps is obtained by dynamic simulations, and then coupled into an improved lubrication model. Different from the traditional lubrication model which takes the pressure stress factor and shear stress factor to be constant, the model proposed in this paper calculated these factors in real time using numerical integration to achieve a more realistic simulation. Based on the improved piston rings and cylinder liner lubrication model, the minimum oil film thickness and friction force curves are obtained for an entire work cycle. It shows that the friction force obtained from the improved model manifests clear oscillations in each stoke, which is different from the smoothed profiles predicted traditionally. Moreover, the average amplitude of the friction forces also shows clear reduction.

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“…Simulations and interpretations of dynamic effects (processes) included in the magnetic fields remain in the level of models [57], and there are missing measurements performed on real industrial systems in-site; the values of the magnetic fields are interpreted only as values, not as the causality-degradation processes. The utilization of analytic tools in the form of trends in spectral analysis with using bispectra [58,59] refers to the possibilities of visualization of the measured signals.…”

Section: Introductionmentioning

confidence: 99%

Low-Frequency Magnetic Fields in Diagnostics of Low-Speed Electrical and Mechanical Systems

et al. 2021

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The magnetic field created by technical devices is a source of information. This information could be used in contactless diagnostics and predictive maintenance or for resolving problems along with standard NDT (nondestructive testing) methods, especially if we consider large, slow-speed devices, such as electromotors, transmissions, or generators. Identification of causalities of device failure processes with near magnetic field is one of the suitable NDT methods improving sustainability of systems. The measurements presented in the article were performed with the VEMA 04 fluxgate vector magnetometer with the DC-250 Hz bandwidth and 2 nT sensitivity. Postprocessing of the results was performed in the means of standard methods of discrete Fourier Transform, spectrogram creation and Wavelet Transform. The article presents data gathered during the measurement of a pair of extraction fans with power of 140 kW each and maximum revolutions up to 740 rev/min controlled by frequency converters and a single semi-Kaplan water power plant with 400 kW peak power at 1005 rev/min maximum generator speed. The measurements were performed before and after repairs of one of the ventilators in the ventilation system at 60% and 100% of maximal output power. The rotating magnetic fields of the fan electromotor stator, fan rotor revolutions, rotor slip frequency and ball-bearing frequencies were identified in frequency spectrums in the distance of 700 mm from fan electromotor axis in both cases. During the measurements on the semi-Kaplan turbine, the changes in states of mechanical and electrical components of the machine were monitored in the magnetic fields with increase of the power in the range of 0–95%, before and after phasing to the electrical grid. Standard processing methods, Discrete Fourier Transform, spectrograms and Discrete Wavelet Transform were used. In the spectrograms of the measured magnetic fields, the 1st–4th harmonics of the turbine shaft, generator shaft and also their side frequencies were identified. Significant changes of magnetic fields in time were identified in the area of 60–95% power. With the help of the Wavelet, transform intervals were identified where it is desirable to operate the turbine. The analyses of magnetic fields measurements performed on the power plant were compared with vibro-diagnostic principles.

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Investigation into the Vibrational Responses of Cylinder Liners in an IC Engine Fueled with Biodiesel

Cited by 16 publications

References 20 publications

Comparison of CO2 Emission between Methanol and Gasoline Internal Combustion Engine

Comparison of CO2 Emission between Methanol and Gasoline Internal Combustion Engine

An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations

Low-Frequency Magnetic Fields in Diagnostics of Low-Speed Electrical and Mechanical Systems

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