Separation of combustion noise and piston-slap in diesel engine—Part I: Separation of combustion noise and piston-slap in diesel engine by cyclic Wiener filtering

Badaoui, Mohamed El; Danière, J.; Guillet, François; Servière, Christine

doi:10.1016/j.ymssp.2005.08.010

Cited by 59 publications

(43 citation statements)

References 8 publications

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“…Currently, there are many scholars who utilised the cyclic Wiener filtering method [5], blind source separation method [6][7][8], improved spectrofilter method [9], speed-varying filter [10], and other multichannel methods to separate and identify the noise sources of the internal combustion engine.…”

Section: Introductionmentioning

confidence: 99%

Radiation Noise Separation of Internal Combustion Engine Based on Gammatone-RobustICA Method

Yao

Xiang

Qian

et al. 2017

Shock and Vibration

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In the internal combustion engine noise source separation process, the combustion noise and the piston slap noise are found to be seriously aliased in time-frequency domain. It is difficult to accurately separate them. Therefore, the noise source separation method which is based on Gammatone filter bank and robust independent component analysis (RobustICA) is proposed. The 6-cylinder internal combustion engine vibration and noise test are carried out in a semianechoic chamber. The lead covering method is adopted to isolate the interference noise from numbers 1 to 5 cylinder parts, with only the number 6 cylinder parts left bare. Firstly, many mode components of the measured near-field radiated noise signals are extracted through the designed Gammatone filter bank. Then, the RobustICA algorithm is utilised to extract the independent components. Finally, the spectrum analysis, the continuous wavelet time-frequency analysis, the correlation function method, and the drag test are employed to further identify the separation results. The research results show that the frequency of the combustion noise and the piston slap noise are, respectively, concentrated at 4025 Hz and 1725 Hz. Compared with the EWT-RobustICA method, the separation results obtained by the Gammatone-RobustICA method have very fewer interference components.

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Section: Introductionmentioning

confidence: 99%

Radiation Noise Separation of Internal Combustion Engine Based on Gammatone-RobustICA Method

Yao

Xiang

Qian

et al. 2017

Shock and Vibration

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“…H 1 estimator, if the in-cylinder pressure signal is known [10,11,13,14,17,19]. The spectrofilter extracts engine noise components which are correlated with in-cylinder pressure, thus providing an estimate of the combustion noise.…”

mentioning

confidence: 99%

Diesel engine combustion and mechanical noise separation using an improved spectrofilter

Pruvost

Leclère

Parizet

2009

Mechanical Systems and Signal Processing

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“…The frequency range between 500 and 3000 Hz has been chosen by earlier studies [9,10,[21][22][23]] to identify and analyze the piston slap-induced events. As Figure 13 shows, there is probably some truth to this, which may stem from mode characteristics inherent in liner structures.…”

Section: Dynamic Responses To Piston Slapsmentioning

confidence: 99%

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

Wang

et al. 2017

Applied Sciences

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Abstract:The paper presents a study of the relationship between the combustion behavior and vibration response of internal combustion (IC) engines fueled with biodiesel based on finite element modelling along with experimental evaluation. An improved finite element (FE) model is established and validated to predict the dynamic responses of cylinder liners with respect to two main sources: combustion shock and piston side thrust. Based on the validated FE model, the response characteristics of the cylinder liner in an IC engine fueled with biodiesel and its causal relationship with excitation sources have been predicted. Due to the lower calorific value of biodiesel, a greater amount of fuel is injected into the combustion chamber to maintain power outputs, which results in a prolonged combustion duration and subsequent higher overall vibration levels, compared with that of diesel. The advanced ignition of biodiesel is the main cause to the compound effect on the coupling of piston side-thrust force, thereby resulting in a nonlinear increase in the root mean square (RMS) of local vibration response close to the combustion top dead center (TDC). These key findings provides insight understandings for not only biodiesel combustion diagnostics but also more accurate diagnostics of fossil diesel based on nonintrusive vibrations.

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Separation of combustion noise and piston-slap in diesel engine—Part I: Separation of combustion noise and piston-slap in diesel engine by cyclic Wiener filtering

Cited by 59 publications

References 8 publications

Radiation Noise Separation of Internal Combustion Engine Based on Gammatone-RobustICA Method

Radiation Noise Separation of Internal Combustion Engine Based on Gammatone-RobustICA Method

Diesel engine combustion and mechanical noise separation using an improved spectrofilter

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

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