Tribological properties and releasing behavior of solid lubricant WS2 in the dimples on cylinder liner surface of diesel engine

Piston rings are responsible for a major part of the frictional losses in a heavy-duty diesel engine. Such losses can be reduced by applying texture, such as dimples, on the cylinder liner surface. This paper investigates the effect of such texture on the friction between a land of the oil control ring and a textured cylinder liner via numerical simulation. A simulation model considering inertia and mixed lubrication together with a mass-conserving cavitation model is developed. The model is used to determine the dimple parameters that yield the lowest amount of friction for a specific oil control ring of a heavy-duty diesel engine.

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Effects of honed cylinder liner surface texture on tribological properties of piston ring-liner assembly in short time tests

Tribology International ◽

10.1016/j.triboint.2016.11.025 ◽

2017 ◽

Vol 113 ◽

pp. 137-148 ◽

Cited By ~ 41

Author(s):

Wieslaw Grabon ◽

Pawel Pawlus ◽

Slawomir Wos ◽

Waldemar Koszela ◽

Michal Wieczorowski

Keyword(s):

Tribological Properties ◽

Surface Texture ◽

Piston Ring ◽

Cylinder Liner ◽

Liner Surface ◽

Short Time

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Abrasion of S-H Cast Iron for Cylinder Liner of High Speed Diesel Engine

Bulletin of JSME ◽

10.1299/jsme1958.8.230 ◽

1965 ◽

Vol 8 (30) ◽

pp. 230-238

Author(s):

Tadao NAKAJO

Keyword(s):

Cast Iron ◽

Diesel Engine ◽

High Speed ◽

Cylinder Liner ◽

High Speed Diesel

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Mutual Effect of Groove Size and Anisotropy of Cylinder Liner Honed Textures on Engine Performances

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.966-967.175 ◽

2014 ◽

Vol 966-967 ◽

pp. 175-183 ◽

Cited By ~ 3

Author(s):

Mohammed Yousfi ◽

Sabeur Mezghani ◽

Ibrahim Demirci ◽

Mohamed El Mansori

Keyword(s):

Mutual Effect ◽

Cylinder Liner ◽

Texture Features ◽

Groove Depth ◽

Oil Consumption ◽

Hydrodynamic Friction ◽

Liner Surface ◽

Ring Pack ◽

Mixed Lubrication Regime ◽

Cylinder Bore

The cylinder liner surface texture, widely generated by the honing technique, contributes a lot on engine functional performances (friction, oil consumption, running-in, wear etc.). In order to improve these functional performances, different honing processes are being developed. These different honing processes generate surfaces with various texture features characteristics (roughness, valleys depth, valley width, cross hatch angle, etc.). This paper addresses a comparison of ring-pack friction for cylinder texture with different cross-hatch angles and valley sizes. It takes in consideration the mutual effect of valley depth and honing angle. A numerical model is developed to predict friction within the cylinder ring-pack system in mixed lubrication regime and a morphological method is used to characterize groove depth. The results show the effect of different honing variables (rotation speed, stroke speed and indentation pressure) on cylinder bore surface textures and hydrodynamic friction of the ring-pack system.

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Optimization of cylinder liner surface finish by slide honing

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405410396154 ◽

2012 ◽

Vol 226 (4) ◽

pp. 575-584 ◽

Cited By ~ 21

Author(s):

Z Dimkovski ◽

F Cabanettes ◽

H Löfgren ◽

C Anderberg ◽

R Ohlsson ◽

...

Keyword(s):

Surface Finish ◽

Cylinder Liner ◽

Liner Surface

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Running-in Wear Monitoring of Piston Rings and Cylinder Liner of a Realistic Diesel Engine Using Magneto-resistive Sensor

10.4271/2021-01-5000 ◽

2021 ◽

Author(s):

Sangharatna Ramteke ◽

Raghuram Maddineni ◽

H. Chelladurai

Keyword(s):

Diesel Engine ◽

Cylinder Liner ◽

Piston Rings ◽

Resistive Sensor ◽

Wear Monitoring

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Tribological properties of the epoxy resin-based solid lubricant coating modified by Kevlar fibers

Industrial Lubrication and Tribology ◽

10.1108/ilt-09-2017-0259 ◽

2018 ◽

Vol 70 (9) ◽

pp. 1706-1713 ◽

Cited By ~ 2

Author(s):

Guotao Zhang ◽

Yanguo Yin ◽

Ting Xie ◽

Dan Li ◽

Ming Xu ◽

...

Keyword(s):

Wear Resistance ◽

Epoxy Resin ◽

Tribological Properties ◽

Dry Friction ◽

Friction And Wear ◽

Solid Lubricant ◽

Transfer Film ◽

Wear Properties ◽

Content Type ◽

Friction And Wear Properties

Purpose This paper aims to obtain high mechanical and good tribological properties of epoxy resin-based coatings under dry friction conditions. Design/methodology/approach Bonded solid lubricant coatings containing Kevlar fibres were prepared by a spraying method. The friction and wear properties of the coatings were experimentally investigated with a face-to-face tribometre under dry friction conditions. Scanning electron microscopy, energy dispersive X-ray spectroscopy and 3D laser scanning technologies were used to characterise the tribological properties. The action mechanism of the Kevlar fibres on a solid lubricant transfer film was also analysed. Findings Adding Kevlar fibres can significantly improve the wear resistance of the coatings. When the Kevlar fibre content increases, the tribological properties of the coatings improve and then worsen. Superior properties are obtained with 0.03 g of Kevlar fibres. Appropriately increasing the load or speed is beneficial to the removal of the outer epoxy resin and the formation of a lubricant film. During friction, the solid lubricants wrapped in the epoxy resin accumulate on the surface to form a transfer film that shows a good self-lubricating performance. In the later friction stage, fatigue cracks occur on the solid lubricant film but cannot connect to one another because of the high wear resistance and the entanglement of the rod-like Kevlar fibres. Thus, no large-area film falls from the matrix, thereby ensuring the long-term functioning of solid lubricant coatings. Originality/value Epoxy resin-based solid lubricant coatings modified by Kevlar fibres were prepared, and their friction and wear properties were investigated. Their tribological mechanisms were also proposed. This work provided a basis for the analysis of the tribological properties and design of bonded solid lubricant coatings containing Kevlar fibres.

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