Cross hatched texture influence on the load carrying capacity of oil control rings

Biboulet, N.; Bouassida, H; Lubrecht, Antonius

doi:10.1016/j.triboint.2014.09.024

Cited by 49 publications

(34 citation statements)

References 24 publications

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“…In specific, the friction reduction was up to 73%, as the ring-cylinder contact becomes more conformal. In this direction, significant part of this research about the oil control ring tribological behaviour is also reported by Biboulet et al 33 Their model includes the reaction of flat shape oil ring under cross-hatched textures cylinder liner solving the steady-state Reynolds equation. They concluded that cross-hatched cylinder liner substantially improves the hydrodynamic carrying capacity of the oil ring flat face, leading to thicker lubricant films which would reduce engine friction.…”

mentioning

confidence: 77%

“…Attempts to include the effects of textured cylinder liner in the compression ring tribological analysis have been made. The works of Tomanik et al, Checo et al and Biboulet et al showed the micro dimples effect on the cylinder liner and ring pack tribological performance respectively. Tomanik's study developed a one‐dimensional computer model in order to simulate surface topographies and to examine their effects on the flat and barrel faced ring combined with Greenwood and Trip contact model in the boundary lubrication.…”

Section: Introductionmentioning

confidence: 99%

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Cavitation effects on textured compression rings in mixed lubrication

Zavos

Nikolakopoulos

2016

Lubr. Sci.

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Thin lubricant films and cavitation to ring-bore contact have a directly correlation between wear and emissions output of internal combustion engines. Thus, there is a need to develop innovate engineering solutions such as surface texturing. In particular, micro textures are manufactured in order to keep more lubricant in weakly lubricated contact. An isothermal mixed-hydrodynamic analysis was developed for textured compression rings, which utilised the effects of two-phase flow using Navier-Stokes equations, vapour transport and asperity interaction. Realistic boundary conditions are used from a real motorbike engine. This paper employs a computational model including multiphase flow of the ring-bore conjunction in order to predict the effects of surface texturing of the barrel face ring around the dead centres. The model is validated using numerical and experimental results from the literature. Additionally, flow simulations have been performed, on how micro-dimples shape and depth on the ring liner affect on the total friction and minimum lubricant film.

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mentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Cavitation effects on textured compression rings in mixed lubrication

Zavos

Nikolakopoulos

2016

Lubr. Sci.

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“…Moreover, Biboulet et al and Noutary et al proposed multi-grid techniques to solve deterministic hydrodynamic lubrication models with non-mass-conservative cavitation for the piston ring cylinder liner contact with measured textured surfaces. It was shown that the groove depth and density are important factors determining the load carrying capacity, whereas the groove shape has only a minor influence [137][138][139]. A deterministic mixed lubrication model was also proposed by Minet et al for mechanical seals applications.…”

Section: Full Deterministic Methodsmentioning

confidence: 99%

Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

2019

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Surface texturing has been frequently used for tribological purposes in the last three decades due to its great potential to reduce friction and wear. Although biological systems advocate the use of hierarchical, multi-scale surface textures, most of the published experimental and numerical works have mainly addressed effects induced by single-scale surface textures. Therefore, it can be assumed that the potential of multi-scale surface texturing to further optimize friction and wear is underexplored. The aim of this review article is to shed some light on the current knowledge in the field of multi-scale surface textures applied to tribological systems from an experimental and numerical point of view. Initially, fabrication techniques with their respective advantages and disadvantages regarding the ability to create multi-scale surface textures are summarized. Afterwards, the existing state-of-the-art regarding experimental work performed to explore the potential, as well as the underlying effects of multi-scale textures under dry and lubricated conditions, is presented. Subsequently, numerical approaches to predict the behavior of multi-scale surface texturing under lubricated conditions are elucidated. Finally, the existing knowledge and hypotheses about the underlying driven mechanisms responsible for the improved tribological performance of multi-scale textures are summarized, and future trends in this research direction are emphasized.

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“…Zavos and Nikolakopoulos [20] presented a computational study regarding the effect of surface texturing on the tribological behavior of the piston ring. Tomanik et al [21], Biboutlet et al [22], and Urabe et al [23] studied the effects of various surface textures on the reduction in piston ring friction. It can be concluded that the efficiency of surface texturing on engine friction reduction has been recognized by a number of studies.…”

Section: Surface Modificationmentioning

confidence: 99%

Design approach for optimization of a piston ring profile considering mixed lubrication

Zhang

Xie

2016

Friction

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Abstract:To reduce the friction of a piston ring while maintaining a large oil film load-carrying capacity, an approach comprising of the inverse method and the sequential quadratic programming algorithm was proposed. The approach considers the variation of mixed lubrication and variable lubricant viscosity with temperature along the engine stroke, is developed to optimize the profile of a piston ring. A piston ring profile is represented by a polynomial function. A case study of the second piston ring shows that the proposed method can be applied for the optimization of a piston ring profile. In addition, this paper illustrates the effects of the degree of a polynomial function. The results show that the minimization of friction and maximization of oil film load-carrying capacity can be balanced simultaneously when the degree of the polynomial is 2 and 5.

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Cross hatched texture influence on the load carrying capacity of oil control rings

Abstract: International audienc

Cited by 49 publications

References 24 publications

Cavitation effects on textured compression rings in mixed lubrication

Cavitation effects on textured compression rings in mixed lubrication

Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

Design approach for optimization of a piston ring profile considering mixed lubrication

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