Effects of liner surface textures on the tribological performance of different production piston rings

The effect of cylinder liners on engine performance is substantial. Typically, the cylinder surfaces were plateau honed. However, recently additional dimples or grooves were created on them. This work discusses the tribological impacts of textured cylinder liner surfaces based on a review of the literature. The results of the experimental research obtained using test rigs and fired engines were critically reviewed. In addition, the results of the modeling are shown. Circular oil pockets and grooves perpendicular to the sliding direction of piston rings of small depths were typically used. Surface texturing of the cylinder liners governs lubrication between the cylinder liner and the piston ring by an increase in oil film thickness near the reversal points leading to reductions in friction force and wear and in the fired engine to a decrease in fuel consumption and to an increase in power or torque. The correct texturing pattern ensures a decrease in the oil consumption, blow-by, and emissions of the internal combustion engine compared to plateau-honed surfaces. Considerations of future challenges are also addressed. The volume of lubricant reservoir in surface topography, called oil capacity, should be a substantial parameter characterizing textured surfaces.

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“…Xu et al [ 91 ] found that the dimple presence had marginal influence on the friction force of the oil control ring-liner sliding pair.…”

Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

Surface Texturing of Cylinder Liners: A Review

2022

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“…While surface texturing has been applied to cylinder walls of internal combustion engines [59,60] or on both the liner and piston rings [61], this paper focuses on the laser surface texturing of piston rings.…”

Section: Tribological Test With Laser Textured Piston Ringcylinder Li...mentioning

confidence: 99%

A Review on Friction Reduction by Laser Textured Surfaces in Internal Combustion Engines

et al. 2022

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The internal combustion engine will be required as a bridge-technology in the upcoming decades to achieve a significant reduction in local emissions in the mobility, and logistics sector. Alternative fuel technologies will present new mechanical engineering challenges, including increasing efficiency and reducing mechanical losses. Textured surfaces with appropriate manufacturing parameters can enhance lubrication, and reduce friction in sliding and rolling contacts, e.g., journal bearings, or the piston ring -cylinder subsystem. This paper gives an overview of 80 scientific works related to laser surface technologies, with an emphasis on surface texturing for friction reduction from the viewpoint of engine development. The most common texture types, further directions, and general challenges are highlighted in the summary.

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“…For the taper-faced ring liner pair, smaller dimples enhance oil scraping efficiency and oil film distribution stability. However, concerning the oil control ring liner pair, only a small influence could be noticed [ 8 ]. Unlike the numerous research papers in the experimental field, only a few articles address numerical calculations, and even fewer address the combination of experimental and numerical research papers.…”

Section: Introductionmentioning

confidence: 99%

Friction Reduction by Dimple Type Textured Cylinder Liners—An Experimental Investigation

Söderfjäll

Gachot

2023

Materials

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Applying texture to a surface in a tribological interface will influence frictional performance, which has been investigated in several previous studies. However, since varying operating conditions heavily affect the frictional performance and optimum texture dimensions, more work in this field is required. There are few experimental studies concerning the influence of texture on friction especially under sliding lubricated conditions and even fewer at high sliding speeds. In this work, the effect of texture on frictional losses between the piston ring and cylinder liner is studied experimentally. The texture is of the dimple type, with a diameter and depth of 300 µm and 3 µm, respectively, applied to the cylinder liner surface. Experiments are performed with sliding speeds close to real piston sliding speeds. A clear reduction in frictional losses is observed with the textured cylinder liner. Moreover, qualitatively comparing the experimental results to a numerical model shows a good correlation.

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Effects of liner surface textures on the tribological performance of different production piston rings

Cited by 10 publications

References 34 publications

Surface Texturing of Cylinder Liners: A Review

Surface Texturing of Cylinder Liners: A Review

A Review on Friction Reduction by Laser Textured Surfaces in Internal Combustion Engines

Friction Reduction by Dimple Type Textured Cylinder Liners—An Experimental Investigation

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