Improving Tribological Behavior of 2-Stroke Marine Diesel Engine Piston Ring by Cylinder Liner Surface Texturing

Mohamad, Salaheldin A.; Zheng, Qun; Lu, Xi Qun

doi:10.4028/www.scientific.net/amm.620.278

Cited by 7 publications

(5 citation statements)

References 12 publications

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Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

“…The superiority of multi-scale grooves density of 10–25% over 50% for reducing friction was found in [ 139 , 140 ]. The proposed density associated with a depth-to-width ratio of 0.06–0.14 yielded the best results [ 140 ]. Recently, Mohamad and Kamel [ 141 ] studied the effects of parabolic macro-scale grooves ( Figure 27 ) on cylinder liners on friction reduction.…”

Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

“…Recently, Mohamad and Kamel [ 141 ] studied the effects of parabolic macro-scale grooves ( Figure 27 ) on cylinder liners on friction reduction. Similarly to [ 139 , 140 ], they analyzed hydrodynamic lubrication and asperity contact pressure. On the basis of analysis, they selected the optimum dimensions of the grooves.…”

Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

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Surface Texturing of Cylinder Liners: A Review

2022

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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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Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

Section: Functional Performance Of Textured Cylinder Liner Surfacesmentioning

confidence: 99%

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Surface Texturing of Cylinder Liners: A Review

2022

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“…Klit and Vølund 14 used a test rig to measure the friction force between the friction pairs in a two-stroke MDE and found that the ring experienced three lubrication regimes in each stroke. For the liner surface of a two-stroke MDE, Mohamad et al 15,16 studied the effect of different groove parameters on the friction force. Wolff 17 simulated both friction behavior and piston ring movement in a two-stroke MDE, taking account of increase in the oil film thickness.…”

Section: Introductionmentioning

confidence: 99%

Lubrication analysis for the piston ring of a two-stroke marine diesel engine taking account of the oil supply

et al. 2019

International Journal of Engine Research

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The piston ring is one of the most important parts of a two-stroke marine diesel engine. It is lubricated by a special mode in which the lubricating oil is directly injected into the liner’s inner surface. In this article, taking account of the oil supply, a piston ring lubrication model is developed based on oil mass conservation. The lubrication region of this piston ring–cylinder liner is divided into inlet, core lubrication, and outlet regions, with the oil supply being converted into an oil film. The impact of the width of the core lubrication region on squeezing of the oil is considered. To verify the model, friction force measurements are performed in a reciprocating bench test under fully flooded conditions, and the model is further validated by comparing the minimum oil film thickness with data from the literature. The model is applied to the top ring of a two-stroke marine diesel engine, and the impacts of the oil supply and its design parameters are analyzed.

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“…Surface texturing as a method to improve mechanical tribological properties can also improve mechanical sealing (Etsion et al, 1999;Rosenkranz et al, 2019). At present, there are only few reports on the sealing performance of CLPR (Siripuram and Stephens, 2004;Mohamad et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of grooved cylinder liner depths on the tribological performances of cylinder liner-piston ring

Yang

Guo

2019

ILT

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Purpose Frictions in cylinder liner-piston ring often cause an inevitable loss of energy loss in the diesel engine. This study aims at evaluating the effect of depths in the cylinder liner groove texture on friction, wear and sealing performances. Design/methodology/approach Five depths of groove texture cylinder liners (50, 100, 150, 200, 250 µm) were fabricated, and experiments were carried out using a special-purpose diesel engine tester. Comparative analyses of cylinder liner contact resistances, piston ring wear losses and surface appearances were conducted with respect to different surface textures and applied loads. Findings Under no-load conditions, the cylinder liner with a 100 deep thread groove can significantly improve sealing and optimize its lubrication performance. On the other hand, the sealing is highly correlated with the depth of groove and the load within the cylinder liner. Under loaded conditions, the thread groove has less effect on the sealing performance. Originality/value The findings can provide feasible basis for the tribological design and production of diesel engines.

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Improving Tribological Behavior of 2-Stroke Marine Diesel Engine Piston Ring by Cylinder Liner Surface Texturing

Cited by 7 publications

References 12 publications

Surface Texturing of Cylinder Liners: A Review

Surface Texturing of Cylinder Liners: A Review

Lubrication analysis for the piston ring of a two-stroke marine diesel engine taking account of the oil supply

Effect of grooved cylinder liner depths on the tribological performances of cylinder liner-piston ring

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