Improving tribological behaviour of piston ring–cylinder liner frictional pair by liner surface texturing

2013 ◽  
Vol 61 ◽  
pp. 102-108 ◽  
Author(s):  
Wieslaw Grabon ◽  
Waldemar Koszela ◽  
Pawel Pawlus ◽  
Slawomir Ochwat
Keyword(s):  
Piston Ring ◽  
Surface Texturing ◽  
Cylinder Liner ◽  
Frictional Pair ◽  
Tribological Behaviour ◽  
Liner Surface

Wear performance of cylinder liner surface texturing on cylinder liner–piston ring assembly

2017 ◽  
Vol 232 (3) ◽  
pp. 291-306
Author(s):  
Engao Peng ◽  
Sheng Huang
Keyword(s):  
Piston Ring ◽  
Surface Texturing ◽  
Cylinder Liner ◽  
Morphological Alteration ◽  
Wear Performance ◽  
Rotating Speed ◽  
Ring Assembly ◽  
Inner Surface ◽  
Liner Surface ◽  
Friction Surfaces

The microgeometrical structure has a great impact on lubricating performance of the cylinder liner–piston ring assembly. Extensive investigations have been done upon the various texture types for better lubrication. However, rarely do they focus on the morphological alteration of the friction surfaces during the initial wearing process. In this study, the pits and grooves at the liner inner surface are processed and experiments are conducted to investigate the influence of the surface texturing structure on the piston ring assembly during the initial wearing process at different rotating speeds. Then, the tribology information of cylinder liner–piston ring assembly is obtained and the mechanism between surface texturing structure and lubricating performance was analyzed. Experimental results show that some pits and grooves on the inner surface of the cylinder liner can properly improve the wear performance of cylinder liner–piston ring at a high rotating speed in diesel engine, and hence reducing friction and wear. Moreover, it provides experimental data for theoretical analysis and knowledge for improving the friction surface texturing of cylinder liner.

scholarly journals Wear Behavior of CuSn Coated Piston Ring Sliding against Nodular Cast Iron Cylinder Liner under Heavy-Duty Conditions

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 139 ◽  
Author(s):  
Wenhua Li ◽  
Baihong Yu ◽  
Yutao Lv ◽  
Yan Shen ◽  
Ruoxuan Huang ◽  
...  
Keyword(s):  
Cast Iron ◽  
Piston Ring ◽  
Chemical Elements ◽  
Wear Behavior ◽  
Cylinder Liner ◽  
Nodular Cast Iron ◽  
Wear Loss ◽  
Heavy Duty ◽  
Liner Surface ◽  
Cr Coating

In order to investigate the friction and wear behavior between the nodular cast iron cylinder liner (Fe) and CuSn coated piston ring under heavy-duty conditions, piston rings with chromium(Cr) coating and CuSn-Cr coating were tested using the piston ring reciprocating liner test rig at the simulated working conditions of 56 MPa, 200 r/min, 190 °C. Compared with the Cr/Fe pair, the CuSn coating consumption of the CuSn-Cr/Fe pair made friction coefficient and cylinder wear loss decrease by 2.8% and 51.5%, respectively. Different size Sn patches worn from the CuSn coated piston ring were embedded into the cylinder liner surface based on the surface topography. This process was shown to reduce the surface roughness of a cylinder liner and form flatter plateau structures. Chemical elements analysis indicated that plateau structures on the cylinder liner surface matched with CuSn-Cr coated ring are helpful to promote the tribo-chemical reaction and generate the reactive products to protect the mutually contacted asperities.

Theoretical Analysis of Piston Ring Frictional Loss in an Innovative Rotating Liner Internal Combustion Engine

2005 ◽  
Author(s):  
H. Xu ◽  
M. Kim ◽  
M. D. Bryant ◽  
R. D. Matthews ◽  
T. M. Kiehne
Keyword(s):  
Piston Ring ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Rolling Friction ◽  
Friction Model ◽  
Statistical Parameters ◽  
Restoring Force ◽  
Frictional Loss ◽  
Surface Irregularities ◽  
Liner Surface

This paper presents a new lubrication model to predict piston ring friction. The average Reynolds equation is adopted to obtain the hydrodynamic component of restoring force against the cylinder liner surface. The dry or boundary lubricated component is derived from Greenwood-Tripp model. The influence of surface irregularities or roughness on the lubricant flow will be described by statistical parameters. Unlike classical piston ring mixed lubrication models, a sideslip rolling friction model is incorporated with contact simulation. Numerical results show that piston ring friction is reduced dramatically by the liner rotation.

Improving Tribological Performance of Piston Rings by Partial Surface Texturing

2005 ◽  
Vol 127 (3) ◽  
pp. 632-638 ◽  
Author(s):  
Y. Kligerman ◽  
I. Etsion ◽  
A. Shinkarenko
Keyword(s):  
Piston Ring ◽  
Surface Texturing ◽  
Hydrodynamic Pressure ◽  
Cylinder Liner ◽  
Time Dependent ◽  
Laser Surface Texturing ◽  
Shear Stresses ◽  
Time Behavior ◽  
Viscous Fluid Film ◽  
Potential Use

An analytical model is developed to study the potential use of partial laser surface texturing (LST) for reducing the friction between a piston ring and cylinder liner. The hydrodynamic pressure distribution and the time-dependent clearance between the piston ring and cylinder liner are obtained from a simultaneous solution of the Reynolds equation and the ring equation of motion in the radial direction. The time behavior of the friction force is calculated from the shear stresses in the viscous fluid film and the time-dependent clearance. An intensive parametric investigation is performed to identify the main parameters of the problem. The optimum LST parameters such as dimples depth, texture area density, and textured portion of the nominal contact surface of the piston ring are evaluated.

Wear Resistance of Smooth Automotive Cylinder Liner Surfaces

2005 ◽  
Author(s):  
C. Anderberg ◽  
S. Johansson ◽  
P. H. Nilsson ◽  
R. Ohlsson ◽  
B. G. Rose´n
Keyword(s):  
Fuel Consumption ◽  
Piston Ring ◽  
Functional Performance ◽  
Cylinder Liner ◽  
Engine Oil ◽  
Oil Consumption ◽  
Smooth Cylinder ◽  
Liner Surface ◽  
Oil Fuel ◽  
Cylinder Liners

Demands for decreased environmental impact from vehicles are resulting in a strong push for decreased engine oil, fuel consumption and weight. New machining and coating technologies have offered ways to attack these problems. Engine oil and fuel consumption are to a great extent controlled by the topography of the cylinder liner surface and it is therefore important to optimise this surface. Recent engine tests have shown a reduction in oil consumption when using cylinder liners with a smoother finish than that given by the current plateau honing. However, engine manufacturers are hesitant to introduce smoother liner surfaces because of fears of severe wear and scuffing. There is also the possibility that smoother liner surfaces may be more sensitive to the choice of piston ring finishes. This paper therefore seeks to investigate the functional performance and resistance to wear of these smooth cylinder liners and the mating top ring surfaces.

Numerical Analysis and Experimental Evaluation of Cylinder Liner Macro-Scale Surface Texturing

2015 ◽  
Author(s):  
Renlian Ma ◽  
Salaheldin A. Mohamad ◽  
Xiqun Lu ◽  
Wanyou Li
Keyword(s):  
Numerical Model ◽  
Piston Ring ◽  
Theoretical Study ◽  
Surface Texturing ◽  
Cylinder Liner ◽  
Model Match ◽  
Macro Scale ◽  
Cylinder Liners ◽  
Scale Surface ◽  
Effect Of Surface

An experimental and theoretical study is presented to study the effect of surface texturing in the form of circumferential oil grooves on improving the tribological properties of piston ring-cylinder liner tribosystem. Tests were performed on a reciprocating test rig with actual piston rings and cylinder liner segments, and a numerical model has been developed. A comparison was made between the performance of the textured cylinder liners and un-textured cylinder liners. It was found that with the smaller oil groove area density, the reduction in friction force is more obvious, Parabolic and triangular oil grooves are more efficient in friction reducing, and the prediction results by numerical model match the experimental results well in most case.

Theoretical Model for the Optimal Design of Surface Texturing on Piston Compression Ring

2015 ◽  
Vol 787 ◽  
pp. 327-331
Author(s):  
S. Prakash ◽  
G. Nagarajan
Keyword(s):  
Theoretical Model ◽  
Friction Force ◽  
Carrying Capacity ◽  
Piston Ring ◽  
Surface Texturing ◽  
Cylinder Liner ◽  
Load Carrying Capacity ◽  
Compression Ring ◽  
Load Carrying ◽  
Micro Dimples

A Theoretical model was developed to study the potential use of surface texturing for reducing the friction between a piston ring and cylinder liner. The model can predict the load-carrying capacity and friction force of the piston compression ring from Reynolds equation. The investigation is carried out using different dimple depths as well as different dimple diameters. Micro-dimples on the piston ring were able to generate significant hydrodynamic support. Numerical results show that surface texturing can decrease the friction force and extend the load-carrying capacity. The optimum surface texturing parameters such as dimples depth and dimples diameter were found.

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