Piston Slap Excitation: Literature Review

Luca, Julio Cesar de; Gerges, Samir N. Y.

doi:10.4271/962395

Cited by 15 publications

(4 citation statements)

References 23 publications

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“…The are several contributors involved on the secondary motion as the combustion pressure, the lateral friction force related to the lubricant and the inertia forces. The intensity of the impact force is strictly correlated with the piston kinetic energy that increases when the piston crosses the clearance [1]; thus, the prominent slap occurs in particular just beyond the Top Dead Centre where the pressure inside the cylinder is maximum [16,2]. In working condition, the piston repeatedly bounces from one wall side to another and the number of impacts depends on the engine speed and cylinder pressure with a maximum of 16 impacts per cycle in diesel engines [2].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The noise and vibration sources of an IC engine can be divided in two categories: combustion noise and mechanical noise. The combustion noise is due to the combustion process whereas the mechanical noise mainly concerns several types of mechanical impacts, among which the piston slap [1,2,3] can be particularly relevant in IC diesel engines. The piston slap phenomenon is related to the transversal motion (also called secondary motion) of the piston, which occurs in any crankshaft mechanism with clearances.…”

Section: Introductionmentioning

confidence: 99%

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A CWT-based methodology for piston slap experimental characterization

Buzzoni

Mucchi

Dalpiaz

2017

Mechanical Systems and Signal Processing

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A CWT-based methodology for piston slap experimental characterization

Buzzoni

Mucchi

Dalpiaz

2017

Mechanical Systems and Signal Processing

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“…Piston slap is an unwanted engine noise resulting from piston secondary motion. De Luca and Gerges (1996) gave a comprehensive review of the piston slap mechanism and experimental piston slap analysis, including noise source analysis and parameters influencing piston slap. Since then, with the advent of faster, more powerful computers, much of piston slap study has shifted from experimental analysis to analytical analysis for both the power cylinder design phase and piston noise troubleshooting.…”

Section: Application: Piston Slap Noisementioning

confidence: 99%

Analysis of Computer Experiments Using Penalized Likelihood in Gaussian Kriging Models

Sudjianto

2005

Technometrics

123

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Kriging is a popular analysis approach for computer experiments for the purpose of creating a cheapto-compute "meta-model" as a surrogate to a computationally expensive engineering simulation model. The maximum likelihood approach is used to estimate the parameters in the kriging model. However, the likelihood function near the optimum may be flat in some situations, which leads to maximum likelihood estimates for the parameters in the covariance matrix that have very large variance. To overcome this difficulty, a penalized likelihood approach is proposed for the kriging model. Both theoretical analysis and empirical experience using real world data suggest that the proposed method is particularly important in the context of a computationally intensive simulation model where the number of simulation runs must be kept small because collection of a large sample set is prohibitive. The proposed approach is applied to the reduction of piston slap, an unwanted engine noise due to piston secondary motion. Issues related to practical implementation of the proposed approach are discussed.

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“…Oil viscosity, surface tension, tension in piston rings also affects this force (Slack, 1982). Piston slap can be measured by studying the piston profile as seen in Yawata andCrocker (1983), de Luca andGerges (1996), Chen and Randell (2012). Figure 5 describes the motion of the piston along the X and Y axis as well as rotary motion around the gudgeon pin.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Piston Slap Motion

Narayan¹

2015

International Journal of Applied Mechanics and Engineering

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Piston slap is the major force contibuting towards noise levels in combustion engines.This type of noise depends upon a number of factors such as the piston-liner gap, type of lubricant used, number of piston pins as well as geometry of the piston. In this work the lateral and rotary motion of the piston in the gap between the cylinder liner and piston has been analyzed. A model that can predict the forces and response of the engine block due to slap has been dicussed. The parameters such as mass, spring and damping constant have been predicted using a vibrational mobility model.

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Piston Slap Excitation: Literature Review

Cited by 15 publications

References 23 publications

A CWT-based methodology for piston slap experimental characterization

A CWT-based methodology for piston slap experimental characterization

Analysis of Computer Experiments Using Penalized Likelihood in Gaussian Kriging Models

Analysis of Piston Slap Motion

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