Testing piston rings with partial laser surface texturing for friction reduction

Ryk, G.; Etsion, I.

doi:10.1016/j.wear.2006.01.031

Cited by 350 publications

(190 citation statements)

References 11 publications

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“…Etsion et al [11][12][13][14][15][16][17][18] also contributed to the field through a range of insightful experimental observations. Notably, they demonstrated the importance of aspect ratio and other co-dependent geometric parameters used to describe a textured pattern in controlling the friction performance of a microtextured bearing.…”

Section: Introductionmentioning

confidence: 99%

The Transient Friction Response of a Laser-Textured, Reciprocating Contact to the Entrainment of Individual Pockets

et al. 2016

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To shed light on the mechanisms with which surface texture improves the tribological performance of piston-liner contacts, we have measured the transient friction response as individual pockets pass through a reciprocating sliding contact. Tests were performed at different sliding speeds and results compared to those from a non-textured, reference specimen under different lubrication regimes. At low speed when the contact is in the boundary regime, friction force falls abruptly as each pocket leaves the contact zone, before gradually returning to an approximately steady-state value. This suggests that each pocket acts to temporarily increase the film thickness, which then decays to its non-textured value as oil is squeezed out. At higher speeds, friction is seen to reduce in a stepwise fashion, since the period between pockets being entrained is less than the time taken for the film to decay. In addition, friction results obtained when the contact is operating in the middle of the mixed regime point to a temporary film thickness collapse as the pocket enters the contact, and this agrees with recent modelling predictions. At higher speeds, the compound effect of successive pockets is to shift the contact to the right on Stribeck curve. These results imply that each pocket gives rise to an increase in film thickness that is both short-lived and small in magnitude (we estimate a few tens of nm). However, the resulting effect on friction can be significant (up to 82 % in this study) for two reasons: (1) provided the pocket frequency is sufficiently high, each successive pocket entrainment builds the film up without there being time for it to reduce back to its steady-state value; (2) when the contact is in the mixed regime, the Stribeck curve is at its steepest and friction is therefore most sensitive to film thickness changes. This has important practical implications in that pocket spacing on piston liners should be varied as a function of reciprocating sliding speed.

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Section: Introductionmentioning

confidence: 99%

The Transient Friction Response of a Laser-Textured, Reciprocating Contact to the Entrainment of Individual Pockets

et al. 2016

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“…It is concluded that sliding speed have the most vital parameter for weight loss as well as friction of CL/PR pair and the interaction of sliding speed and the type of oil influenced on piston ring weight loss [15]. shaped rings were studied and investigated that the partial LST piston rings showed about 25% of friction reduction than that of conventional type non-textured barrel shaped rings [21]. John J. Truhan et al have conducted the reciprocating tests on the heavy-duty diesel engine to evaluate wear and behaviour of the friction for materials of the piston ring and cylinder liner.…”

Section: Literature Surveymentioning

confidence: 99%

Experimental Wear Study between Piston Ring and Cylinder Liner Pair using Jatropha Oil as Lubricating Oil

Rajan¹

2017

IJMPERD

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“…The second area of interest is to study various surface textures and their effect on friction reduction [35]. Other studies using similar rigs are also available in literature, such as the work by Ryk and Etsion [40]. All the experimental results shown in this paper correspond to the validation of the model only.…”

Section: Precision Slider Bearing Mechanismmentioning

confidence: 99%

Elastoplastic contact of rough surfaces: a line contact model for boundary regime of lubrication

Chong

Cruz

2014

Meccanica

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This paper introduces an improved friction model accounting for elastoplastic behavior of interacting asperities along contiguous rough surfaces for a line contact solution. It is based on Greenwood and Tripp's original boundary friction model and specifically tailored for a boundary regime of lubrication. The numerical solution of Reynolds' equation is achieved by implementing Elrod's cavitation algorithm for a one dimensional line contact. The transience in the numerical solution is retained by accounting for the squeeze film term in Reynolds' equation under fixed loading conditions and varying sliding motion. A sliding bearing rig is used to measure friction and compare the results with the prediction made using the approach highlighted above. The numerical/experimental results show good agreement.

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Testing piston rings with partial laser surface texturing for friction reduction

Cited by 350 publications

References 11 publications

The Transient Friction Response of a Laser-Textured, Reciprocating Contact to the Entrainment of Individual Pockets

The Transient Friction Response of a Laser-Textured, Reciprocating Contact to the Entrainment of Individual Pockets

Experimental Wear Study between Piston Ring and Cylinder Liner Pair using Jatropha Oil as Lubricating Oil

Elastoplastic contact of rough surfaces: a line contact model for boundary regime of lubrication

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