Combustion noise radiation during dynamic diesel engine operation including effects of various biofuel blends: A review

Giakoumis, Evangelos G.; Rakopoulos, Dimitrios C.; Rakopoulos, C.D.

doi:10.1016/j.rser.2015.10.129

Cited by 80 publications

(30 citation statements)

References 60 publications

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“…Many parts of the internal combustion engine can produce noise. According to the source of the internal combustion engine, the noise can be divided into mechanical noise, combustion noise, and aerodynamic noise [2][3][4]. Mechanical noise mainly includes piston slap noise, air valve knock noise, gear meshing noise, and fuel injection pump noise.…”

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

View full text Add to dashboard Cite

show abstract

“…They also reported that although a higher engine speed generated more noise, substituting the conventional diesel fuel (D100) with the biodiesel fuels lowered the sound pressure level of the engine, up to 0.7 dB(A), when the hydrogen gas was mixed with the intake air. The reduction amount varied, as it is strongly dependent on combustion characteristics of each blend, such as ignition delay, peak pressure level, and pressure gradient inside the cylinders [76][77][78].…”

Section: Biodiesel Fuelsmentioning

confidence: 99%

Performance Enhancement of Internal Combustion Engines through Vibration Control: State of the Art and Challenges

et al. 2019

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Internal combustion engines (ICEs) are the primary source of power generation in today’s driving vehicles. They convert the chemical energy of the fuel into the mechanical energy which is used to drive the vehicle. In this process of energy conversion, several parameters cause the engine to vibrate, which significantly deteriorate the efficiency and service life of the engine. The present study aims to gather all the recent works conducted to reduce and isolate engine vibration, before transmitting to other vehicle parts such as drive shafts and chassis. For this purpose, a background history of the ICEs, as well as the parameters associated with their vibration, will be introduced. The body of the paper is divided into three main parts: First, a brief summary of the vibration theory in fault detection of ICEs is provided. Then, vibration reduction using various mechanisms and engine modifications is reviewed. Next, the effect of using different biofuels and fuel additives, such as alcohols and hydrogen, is discussed. Finally, the paper ends with a conclusion, summarizing the most recent methods and approaches that studied the vibration and noise in the ICEs.

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“…e noise source of the internal combustion engine is mainly composed of combustion noise, piston slap noise, gear noise, valve knock noise, fuel pump noise, and so forth [6]. Among these noise sources, combustion noise and piston slap noise account for 80% of the total noise [7]. ey are the main noise sources of the internal combustion engine.…”

Section: Introductionmentioning

confidence: 99%

Noise Source Separation of an Internal Combustion Engine Based on a Single‐Channel Algorithm

Yao

Xiang

Qian

et al. 2019

Shock and Vibration

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The separation and identification technology of noise sources is the focus and hot spot in the field of internal combustion engine noise research. Combustion noise and piston slap noise are the main noise sources of an internal combustion engine. However, both combustion noise and piston slap noise occur almost at the top dead center. They mix in the time domain and frequency domain. It is difficult to accurately and effectively separate them. A single-channel algorithm which combines time-varying filtering-based empirical mode decomposition (TVF-EMD) and robust independent component analysis (RobustICA) methods is proposed to separate them. Firstly, the TVF-EMD method is utilized to decompose the single-channel noise signal into several intrinsic mode functions (IMFs). Then, the RobustICA method is applied to extract the independent components. Finally, related prior knowledge and time-frequency analysis are employed to identify noise sources. Furthermore, the spectral filtering method and the calculation method of piston slap noise based on the dynamic model are further carried out to verify separation results. The simulation and experimental research results show the effectiveness of the proposed method.

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Combustion noise radiation during dynamic diesel engine operation including effects of various biofuel blends: A review

Cited by 80 publications

References 60 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

Performance Enhancement of Internal Combustion Engines through Vibration Control: State of the Art and Challenges

Noise Source Separation of an Internal Combustion Engine Based on a Single‐Channel Algorithm

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