Study on the effect of piston skirt profile on the vibration behavior of non-road high pressure common rail diesel engine

Wu, Limin; Bi, Yuhua; Shen, Lizhong; Lei, Jilin; Zhang, Lei; Zhou, Feng

doi:10.1016/j.apacoust.2019.01.007

Cited by 13 publications

(6 citation statements)

References 20 publications

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“…The piston slap was mainly influenced by the combustion pressure and inertia force at the same oil temperature and piston-liner clearance. 9 Figure 6(e) showed the peak value of combustion pressure versus engine speed, which showed the same trend with the energy of frequency bands from 1 to 5. So it can be concluded that the frequency bands from 1 to 5 were mainly influenced by the combustion pressure.…”

Section: Resultssupporting

confidence: 52%

“…Narayan 8 found that piston pin offset to the anti-thrust side (ATS) can be helpful to reduce piston slap based on the analysis result of a dynamic model. Wu et al 9 studied the relationship between the profile of piston skirt and block vibration with a Finite Element Analysis (FEA) model. Result showed that the bump position of the piston skirt had great influence on piston slap and block vibration.…”

Section: Introductionmentioning

confidence: 99%

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Study on the influence of various factors on block vibration

Zhang

Yin

et al. 2023

International Journal of Engine Research

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The influence of engine speed, torque, oil temperature, and piston liner clearance on the block vibration was studied with experimental test and wavelet packet decomposition method (WPD). The wavelet packet function of db10 and decomposition level of four was confirmed based on the Shannon entropy. The frequency analysis of the block vibration measured at motor-driven condition showed that the spectrum energy was mainly concentrated in the range of 4–5, 10–15, and 20–25 kHz. The energy of each frequency band obtained from WPD was contrasted at different engine speed, torque, oil temperature, and piston-liner clearance conditions. On this basis, the interaction between different factors was further investigated. The sensitive frequency band of block vibration was confirmed for different factors.

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Section: Resultssupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Study on the influence of various factors on block vibration

Zhang

Yin

et al. 2023

International Journal of Engine Research

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“…Vibration noise performance can be significantly improved by adjusting the bump position of piston skirt downward. 12 The research of Yin Bifeng et al, that showed that appropriately increasing the depth of the cavity can improve the wear within a certain range. However, if the cavity depth increase too much, the abrasion of the main thrust surface will be aggravated.…”

Section: Improvement Of Piston Structure Of Internal Combustion Enginementioning

confidence: 99%

Study on lubrication performance of engine piston skirt with bionic design

Bo,

Song,

Weijun

et al. 2023

Advances in Mechanical Engineering

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As the main friction pair of engine, the friction loss of piston-cylinder liner assembly in the working process has become the main reason of engine friction power consumption. Many species in the biological world have formed non-smooth forms of resistance reduction after thousands of years of survival and evolution. Many people have applied this non-smooth shape of drag reduction on organisms to the surface of friction pairs in construction machinery. Based on LX108 engine, the wear and erosion resistance of Scapharca subcrenata surface is applied to the piston skirt, which is the main friction pair in the engine. Nine test schemes were designed according to orthogonal test. This design selects three factors, namely, groove distribution type, groove depth and width, groove spacing, and each factor includes three levels. The macroscopic fluid lubrication state of the whole piston skirt with bionic shape is studied. Through the change of oil film thickness caused by thermal-mechanical coupling deformation of skirt, combined with the average Reynolds equation, the hydrodynamic pressure of lubricating oil, shear stress, and skirt friction force are obtained to verify the contribution of bionic shape to piston drag reduction, wear reduction, wetting increase, and friction power consumption. The simulation and test results show that the lubrication of all parts of the bionic groove piston skirt is better than that of the standard piston; When the depth and width of groove is 0.8 mm and the spacing is 10°, the thicker the oil film thickness of skirt is; The bionic piston whose oil film bearing area is 74%–87% of the standard piston has the smallest normal pressure and friction; When the upper end of the skirt is arranged with groove shape and the lower end is arranged with narrow groove shape between wide grooves, the lubrication effect is better.

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“…For example, when sitting in the car and start the engine, one can feel certain vibration levels more or less. The source of such vibration is a physics movement of the piston (Geng & Chen, 2005;Liu & Randall, 2005;Moosavian et al, 2016Moosavian et al, , 2017Reghu et al, 2018;Wu et al, 2019) and crankshafts (Fung & Chen, 1998;Karkoub, 2000;Veciana Fontanet et al, 2021) of the vehicle's motor. Anyone see that the forcing load repeats in a sinusoidal repetition for each cylinder.…”

Section: Introductionmentioning

confidence: 99%

Forced Frequency Response Analysis of a Gudgeon Pin

Gulsevincler

2022

EJOSAT

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In this study, forced frequency response analysis was applied on the gudgeon pin. Ansys Mechanical 19.2 program was used to analyze the vibration on the gudgeon pin. Once completed in the finite element analysis, a note from the modal results, the model's natural frequencies range from 38721 to 79346 Hertz for the first 12 modes. According to the modal analysis results, the gudgeon pin will not be subjected to resonance during working. Therefore, a frequency scan including modal analysis is required to detect resonant frequencies that may coincide with the natural frequencies of the first 12 modes obtained in modal analysis. Consequently, harmonic analysis has been solved using the mode superposition method with 50 intervals with 1000 Hz steps in the range of 30000-80000 Hz. To dampen the resonant frequencies, harmonic analyzes were repeated using six different constant damping ratios, and the results were compared.

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Study on the effect of piston skirt profile on the vibration behavior of non-road high pressure common rail diesel engine

Cited by 13 publications

References 20 publications

Study on the influence of various factors on block vibration

Study on the influence of various factors on block vibration

Study on lubrication performance of engine piston skirt with bionic design

Forced Frequency Response Analysis of a Gudgeon Pin

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