Effect of additives on a surface textured piston ring–cylinder liner system
17 Mar 2019-Tribology - Materials, Surfaces & Interfaces (Taylor & Francis)-Vol. 13, Iss: 2, pp 67-75
TL;DR: In this article, the laser texturing of the surface is used to improve the tribological performance of a piston-ring cinder cone and the piston-pinion cinder.
Abstract: Laser texturing of the surface is a known approach to improve the tribological performance of mechanical systems. Many studies focused on optimising surface texture parameters for the piston-ring c...
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16 Sep 2020
TL;DR: The purpose of this review article is to summarize the current state of the art in surface texturing applied to mechanical applications from the following aspects: application requirements, numerical/ experimental testing and validations, and tribological performance of textured surfaces (wear and friction), as well as limitations in texture designs according to certain applications.
Abstract: Surface textures have been of great interest in the tribology community with nearly 1500 papers published on this topic in the past two decades. With pursuit of low emissions and environmental sustainability, the application of surface texturing to mechanical systems to lower friction and control wear is attracting increasing attention. There is no doubt that certain textured surface can have a beneficial effect on tribological performance but it is widely agreed that the optimization of textures should be carried out based on specific applications requirements. The purpose of this review article is to summarize the current state of the art in surface texturing applied to mechanical applications (cutting tools, piston-ring & cylinder liners, sealing and journal bearings) from the following aspects: application requirements, numerical/ experimental testing and validations, and tribological performance of textured surfaces (wear and friction), as well as limitations in texture designs according to certain applications. Patterns/grooves in micron-scale are the most typical shapes been studied, and benefits of partial texturing are applicable for most of these mechanical applications. Friction reduction of up to 34.5% in cutting tools, 82% in piston-ring & cylinder-liner, 65% in seals and 18% in journal bearings have been observed by experimental tests. Based on primary evidence from the literature, the last section provides general suggestions on current gaps in understanding and modelling and suggests future research directions.
83 citations
TL;DR: In this article, an outline of the piston rings operational characteristics and their main functional challenges is presented, as well as the basic geometrical shapes, materials and manufacturi cation.
Abstract: This paper exhibits an outline of the piston rings operational characteristics and consequently, of their main functional challenges. The basic geometrical shapes, materials and manufacturi...
33 citations
Cites methods from "Effect of additives on a surface te..."
...[176] According to Mishra and Ramkumar[180], the use of a lubricant with additives and a textured ring with dimple geometries also improves the lubrication through the hydrodynamic effect of dimples....
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...According to Mishra and Ramkumar([180]), the use of a lubricant with additives and a textured ring with dimple geometries also improves the lubrication through the hydrodynamic...
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TL;DR: Tribology plays a crucial role in progress of industry and engineering as mentioned in this paper, and the dependence of interface conditions and interfacial reactions provides the strategies for friction reduction as well as anti-wear in industrial processes.
15 citations
TL;DR: The method of the base (valley) one- process profile modeling on the basis of the measured two-process profile was developed and can be extended to simulate the one-process texture of 3D (areal) surface topography.
Abstract: The method of the base (valley) one-process profile modeling on the basis of the measured two-process profile was developed. The base one-process random profile of the Gaussian ordinate distribution is characterized by the standard deviation of the profile height and the correlation length. The problem of estimation of the correlation length of this one-process profile exists. In the procedure of the correlation length estimation, information about the averaged shape of the autocorrelation functions of many one-process profiles after the same type of machining is required. The correlation length of the base one-process profile can be obtained on the basis of the vertical truncation of the measured two-process profile. The average error of the correlation length estimation was not higher than 7%, while the maximum error was not larger than 14%. This method can be extended to simulate the one-process texture of 3D (areal) surface topography.
11 citations
01 Jul 2021
TL;DR: It is well-known that the piston ring/cylinder liner contact is the major contributor to friction losses in the internal combustion engine as discussed by the authors, and numerous studies have evaluated the in...
Abstract: It is well-established that the piston ring/cylinder liner (PRCL) contact is the major contributor to friction losses in the internal combustion engine. While numerous studies have evaluated the in...
7 citations
Cites methods from "Effect of additives on a surface te..."
...The roughness of cylinder liners is 0.45 mm and piston ring samples are 0.15 mm.Material properties of the samples were described in Mishra and Ramkumar.24 Commercially available diesel engine oil (Servo Futura-D 15W-40 API CI4) was used as a lubricant....
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...Material properties of the samples were described in Mishra and Ramkumar.(24) Commercially available diesel engine oil (Servo Futura-D 15W-40 API CI4) was used as a lubricant....
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...Surface contact pressure indicating (SCPI) tape that gives the distribution of pressure between two mating surfaces were used to ensure the conformity of contacts between the surfaces of piston ring and cylinder liner.(24) All the data generated during the experiments were digitally recorded using the data acquisition system....
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References
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TL;DR: In this article, the effect of micro-dimples on the frictional properties of a silicon nitride ceramic mated with hardened steel was investigated and it was found that the porosity depended greatly on the size and density of the microdimples, whilst the dimple shape did not significantly affect the friction coefficient regardless of rounded or angular profiles.
640 citations
"Effect of additives on a surface te..." refers result in this paper
...These results are consistent with the previous studies [27,28] observation that the texturing interfere in the formation of tribochemical films....
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TL;DR: An analytical model is developed to predict the relation between the opening force and operating conditions in a mechanical seal with laser textured micro surface structure in the form of micropores.
Abstract: An analytical model is developed to predict the relation between the opening force and operating conditions in a mechanical seal with laser textured microsurface structure in the form of micropores The model is valid for any desired shape of the micropores An optimization is performed for spherical shape micropores evenly distributed on one of the mating rings face to maximize the opening force and fluid film stiffness Results of a parametric study are presented showing the effect of the main design parameters on the seal performance Some results of an experimental investigation with water-lubricated seal rings are also shown and compared with the theoretical model Presented as a Society of Tribologists and Lubrication Engineers paper at the ASME/STLE Tribology Conference in Toronto, Ontario, Canada, October 26–28, 1998
537 citations
TL;DR: In this paper, an experimental study is presented to evaluate the effectiveness of micro-surface structure, produced by laser texturing, to improve tribological properties of reciprocating automotive components, including piston rings and cylinder linings.
Abstract: An experimental study is presented to evaluate the effectiveness of micro-surface structure, produced by laser texturing, to improve tribological properties of reciprocating automotive components. The test rig and test specimens are described and some test results are presented. Good correlation is found with theoretical prediction of friction reduction on a simple, yet representative, test specimen. Potential benefit of the laser surface texturing under conditions of lubricant starvation is also presented. Finally, friction reduction with actual production piston rings and cylinder liner segments is demonstrated. Presented at the 57th Annual Meeting in Houston, Texas May 19–23, 2002
465 citations
TL;DR: In this paper, the effect of partially laser surface textured piston rings on the fuel consumption and exhaust gas composition of a compression-ignition IC engine was evaluated with a Ford Transit naturally aspirated 2500 cm3 engine at a wide range of engine speeds under near-half load conditions.
379 citations
TL;DR: In this paper, a mathematical model is developed to allow performance prediction of all-liquid noncontacting mechanical seals with regular micro-surface structure in the form of hemispherical pores, and an optimum pore size is found that depends on the other variables and corresponds to maximum axial stiffness and minimum friction torque.
Abstract: A mathematical model is developed to allow performance prediction of all-liquid noncontacting mechanical seals with regular microsurface structure in the form of hemispherical pores. Seal performance such as the equilibrium face separation, friction torque and leakage across the seal are calculated and presented for a range of sealed pressure, pore size and pore ratio of ring surface area. An optimum pore size is found that depends on the other variables and corresponds to maximum axial stiffness and minimum friction torque. Also, a critical pore size is found above which seal failure is possible. Presented as a Society of Tribologists and Lubrication Engineers paper at the STLE/ASME Tribology Conference in Kisslmmee, Florida, October 8–11, 1995
362 citations