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Journal articles on the topic 'Piston rings Lubrication systems Internal combustion engines'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Ahmed Ali, Mohamed Kamal, Hou Xianjun, Richard Fiifi Turkson, and Muhammad Ezzat. "An analytical study of tribological parameters between piston ring and cylinder liner in internal combustion engines." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 230, no. 4 (2016): 329–49. http://dx.doi.org/10.1177/1464419315605922.

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This paper presents a model to study the effect of piston ring dynamics on basic tribological parameters that affect the performance of internal combustion engines by using dynamics analysis software (AVL Excite Designer). The paramount tribological parameters include friction force, frictional power losses, and oil film thickness of piston ring assembly. The piston and rings assembly is one of the highest mechanically loaded components in engines. Relevant literature reports that the piston ring assembly accounts for 40% to 50% of the frictional losses, making it imperative for the piston rin

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2

Tian, T., and V. W. Wong. "Modeling the Lubrication, Dynamics, and Effects of Piston Dynamic Tilt of Twin-Land Oil Control Rings in Internal Combustion Engines." Journal of Engineering for Gas Turbines and Power 122, no. 1 (1999): 119–29. http://dx.doi.org/10.1115/1.483183.

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A theoretical model was developed to study the lubrication, friction, dynamics, and oil transport of twin-land oil control rings (TLOCR) in internal combustion engines. A mixed lubrication model with consideration of shear-thinning effects of multigrade oils was used to describe the lubrication between the running surfaces of the two lands and the liner. Oil squeezing and asperity contact were both considered for the interaction between the flanks of the TLOCR and the ring groove. Then, the moments and axial forces from TLOCR/liner lubrication and TLOCR/groove interaction were coupled into the

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3

Rakosi, Edward, Gheorghe Manolache, Sorinel Gicu Talif, and Dan Teodor Balanescu. "COSRING-LUJET, Integrated New Concept in Automotive I.C. Engines for a Better Lubrication." Applied Mechanics and Materials 659 (October 2014): 231–36. http://dx.doi.org/10.4028/www.scientific.net/amm.659.231.

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The COSRING-LUJET is a new concept for integrated solution to improve the lubrication regime in internal combustion engines. Introducing a conical shape for the peripheral surface of the rings, the authors analyze the conditions for the lubrication regime. Under this new concept, entitled COSRING, has developed a method for determining the transversal profile of the first and the second compression ring in order to obtain a better lubrication conditions for the piston ring – cylinder line assembly. On the other hand, the authors analyze the main factors affecting the cam-follower contact condi

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4

Mahmoud, Kamel G., Oliver Knaus, Tigran Parikyan, Guenter Offner, and Stjepan Sklepic. "An integrated model for the performance of piston ring pack in internal combustion engines." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 232, no. 3 (2017): 371–84. http://dx.doi.org/10.1177/1464419317736676.

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Piston rings are important components in internal combustion engines. Their primary function is to seal dynamically the gap between moving piston and cylinder liner surface in order to prevent the combustion gases from penetrating into the crankcase. The rings also control the oil leakage from the crankcase to the combustion chamber. The performance of the piston ring pack impacts the engine efficiency, durability and emissions. The recognition of the impact of the ring-pack performance on the engine design resulted in a sustained effort of research and development aimed at understanding the o

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5

Ma, M.-T., E. H. Smith, and I. Sherrington. "A Three-Dimensional Analysis of Piston Ring Lubrication Part 1: Modelling." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 209, no. 1 (1995): 1–14. http://dx.doi.org/10.1243/pime_proc_1995_209_401_02.

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The study of piston ring lubrication in internal combustion engines has remained a very active area in tribology. Theoretical analyses have been developed by many researchers to predict the performance characteristics of piston rings, but almost all previous models established were based upon the assumption that ring/cylinder geometry was axisymmetric. This may not be adequate for modern-day engine design since it is well known that cylinder bores are not perfectly circular. They suffer radial distortions which arise for various reasons. In the current work, a three-dimensional model has been

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6

Zhang, Yali, Xiaogang Zhang, Tonghai Wu, and You-bai Xie. "Effects of surface texturing on the tribological behavior of piston rings under lubricated conditions." Industrial Lubrication and Tribology 68, no. 2 (2016): 158–69. http://dx.doi.org/10.1108/ilt-05-2015-0063.

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Purpose – The piston ring-cylinder liner pair is one of the most important tribological systems of an internal combustion engine. The friction loss of the piston ring-cylinder liner pair accounts for the largest portion of total efficiency losses. Therefore, improving the tribological system design of the piston ring-cylinder liner pair can reduce friction losses and bring tremendous economic benefits to society. This paper aims use surface texturing, which is proving to be an effective method, for improving the tribological performance of sliding surfaces. Design/methodology/approach – In thi

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7

Wei, Nasha, James Gu, Fengshou Gu, et al. "An Investigation into the Acoustic Emissions of Internal Combustion Engines with Modelling and Wavelet Package Analysis for Monitoring Lubrication Conditions." Energies 12, no. 4 (2019): 640. http://dx.doi.org/10.3390/en12040640.

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Online monitoring of the lubrication and friction conditions in internal combustion engines can provide valuable information and thereby enables optimal maintenance actions to be undertaken to ensure safe and efficient operations. Acoustic emission (AE) has attracted significant attention in condition monitoring due to its high sensitivity to light defects on sliding surfaces. However, limited understanding of the AE mechanisms in fluid-lubricated conjunctions, such as piston rings and cylinder liners, confines the development of AE-based lubrication monitoring techniques. Therefore, this stud

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8

Abril, Sofia Orjuela, Jhan Piero Rojas, and Eder Norberto Flórez. "Numerical Methodology for Determining the Energy Losses in Auxiliary Systems and Friction Processes Applied to Low Displacement Diesel Engines." Lubricants 8, no. 12 (2020): 103. http://dx.doi.org/10.3390/lubricants8120103.

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The problem of climate change and the reduction of fossil fuels has motivated the development of research focused on improving the efficiency of internal combustion engines. This research proposes a methodology based on mathematical models to determine the energy losses caused by auxiliary systems and friction processes in the engine. Therefore, models are proposed for calculating the energy losses in fuel injection, lubrication, and cooling system. In the same way, models are proposed for the energy losses due to friction in the piston, valve train, and bearings. Experimental tests are carrie

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9

Merkisz, Jerzy, Jaroslaw Mizera, Maciej Bajerlein, Lukasz Rymaniak, and Piotr Maj. "The Influence of Laser Treatment and the Application of Reduced Pressure Force Piston Rings on the Engine Exhaust Emissions under the Conditions of Engine Lubrication with Different Engine Oils." Applied Mechanics and Materials 518 (February 2014): 102–7. http://dx.doi.org/10.4028/www.scientific.net/amm.518.102.

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The paper discusses the investigations on combustion engines that aim at the evaluation of the influence of engine design modifications on the exhaust emissions under application of lubricants of different physicochemical parameters. In the engines the authors applied laser treated cylinder liners, piston rings of reduced pressure force on the cylinder liner and optimized the assembling clearances in the slide bearings. The research was carried out in accordance with the ESC and ELR compliant procedures using different engine lubricants. The measurement series were performed for diesel engines

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10

Ma, M.-T., I. Sherrington, and E. H. Smith. "Implementation of an Algorithm to Model the Starved Lubrication of a Piston Ring in Distorted Bores: Prediction of Oil Flow and Onset of Gas Blow-By." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 210, no. 1 (1996): 29–44. http://dx.doi.org/10.1243/pime_proc_1996_210_475_02.

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Experimental evidence suggests that piston rings in internal combustion engines normally experience 'starved' lubrication at some points along their stroke. To take account of lubricant starvation (and hence move towards a full ring pack analysis), a 'flow continuity algorithm' has been incorporated into a non-axisymmetric lubrication model of a single ring. The algorithm allows both inlet and cavitation boundaries of the full film to be located, making it possible to predict the occurrence of gas blow-by through the ring face, particularly for distorted bores. In addition, oil availability ha

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11

He, Yuhai, Peilin Zhou, Liangtao Xie, and Jiyun Zhang. "New concept and design of electronically controlled cylinder lubrication system for large two-stroke marine diesel engines." International Journal of Engine Research 20, no. 8-9 (2019): 967–85. http://dx.doi.org/10.1177/1468087418822634.

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Lubrication of cylinders between liners and rings is one of the crucial factors that affects the efficient operation of diesel engines. Marine diesel engines usually use inferior heavy fuel oil with high sulphur content, and the acidic substances formed by fuel combustion need alkaline cylinder oil to neutralize. For the operational cost to a marine engine, besides fuel oil, cylinder oil also takes a big share. This article first analyses the advantages and disadvantages of existing cylinder lubrication systems with regard to oil injection control. Second, the control parameters and variables

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12

Dardalis, Dimitrios, Amiyo Basu, Matt J. Hall, and Ronald D. Mattthews. "The Rotating Liner Engine (RLE) Diesel Prototype: Reducing Internal Engine Friction by about 40% under Idle Conditions." Applied Sciences 11, no. 2 (2021): 779. http://dx.doi.org/10.3390/app11020779.

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The Rotating Liner Engine (RLE) concept is a design concept for internal combustion engines, where the cylinder liner rotates at a surface speed of 2–4 m/s in order to assist piston ring lubrication. Specifically, we have evidence from prior art and from our own research that the above rotation has the potential to eliminate the metal-to-metal contact/boundary friction that exists close to the piston reversal areas. This frictional source becomes a significant energy loss, especially in the compression/expansion part of the cycle, when the gas pressure that loads the piston rings and skirts is

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13

Ma, M.-T., I. Sherrington, and E. H. Smith. "Analysis of lubrication and friction for a complete piston-ring pack with an improved oil availability model: Part 1: Circumferentially uniform film." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 211, no. 1 (1997): 1–15. http://dx.doi.org/10.1243/1350650971542273.

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The study of the tribological performance of piston rings plays an important role in piston assembly design. In this study, a comprehensive analysis of piston-ring pack lubrication has been developed. The model employs a flow-continuity algorithm and considers relative ring locations in the piston-ring pack as well as oil accumulation in front of the ring in determining the oil availability. The computer model is able to predict the effect that bore distortion and ring conformability have on piston-ring performance. (This influence is discussed in Part 2 of the paper). In this part of the pape

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14

Li, Wanyou, Yibin Guo, Tao He, Xiqun Lu, and Dequan Zou. "Interring Gas Dynamic Analysis of Piston in a Diesel Engine considering the Thermal Effect." Mathematical Problems in Engineering 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/176893.

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Understanding the interaction between ring dynamics and gas transport in ring pack systems is crucial and needs to be imperatively studied. The present work features detailed interring gas dynamics of piston ring pack behavior in internal combustion engines. The model is developed for a ring pack with four rings. The dynamics of ring pack are simulated. Due to the fact that small changes in geometry of the grooves and lands would have a significant impact on the interring gas dynamics, the thermal deformation of piston has been considered during the ring pack motion analysis in this study. In

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15

Gu, Chongjie, Renze Wang, and Tian Tian. "Modeling the Fatigue Wear of the Cylinder Liner in Internal Combustion Engines during the Break-In Period and Its Impact on Piston Ring Lubrication." Lubricants 7, no. 10 (2019): 89. http://dx.doi.org/10.3390/lubricants7100089.

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In internal combustion engines, a significant portion of the total fuel energy is consumed to overcome the mechanical friction between the cylinder liner and the piston rings. The engine work loss through friction gradually reduces during the engine break-in period, as the result of liner surface topography changes caused by wear. This work is the first step toward the development of a physics-based liner wear model to predict the evolution of liner roughness and ring pack lubrication during the break-in period. Two major mechanisms are involved in the wear model: plastic deformation and asper

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16

Zavos, Anastasios, and Pantelis Nikolakopoulos. "Thermo-mixed lubrication analysis of coated compression rings with worn cylinder profiles." Industrial Lubrication and Tribology 69, no. 1 (2017): 15–29. http://dx.doi.org/10.1108/ilt-11-2015-0169.

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Purpose Compression rings are the main sources of frictional losses in internal combustion engines. The present paper aims to present a thermo-mixed hydrodynamic analysis for coated top compression rings. To understand the coating effects, the main tribological parameters are investigated into a ring-cylinder conjunction in a motorbike engine. Furthermore, flow simulations have been carried out on how different worn profiles on the cylinder inner liner affects friction, lubricant film and localized contact deformation of the coated compression rings. Design/methodology/approach In this paper,

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17

Pusterhofer, Michael, Florian Summer, Daniel Wuketich, and Florian Grün. "Development of a Model Test System for a Piston Ring/Cylinder Liner-Contact with Focus on Near-to-Application Seizure Behaviour." Lubricants 7, no. 12 (2019): 104. http://dx.doi.org/10.3390/lubricants7120104.

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Physical simulations of tribo contacts in internal combustion engines can act as a supporting tool to match upcoming guidelines and emission restrictions. In particular, the scuffing resistance of the contact between the piston ring and cylinder liner suffers under decreasing oil viscosity and limitation of antiwear additives. This paper aims to provide an experimental method to simulate the scuffing of the piston ring/cylinder liner-contact and to validate this method with real engine parts and the literature from engine tests. The experimental methodology uses a linear tribometer TE77 to tes

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18

Cyriac, Febin, Xin Yi Tee, Sendhil K. Poornachary, and Pui Shan Chow. "Influence of structural factors on the tribological performance of organic friction modifiers." Friction 9, no. 2 (2020): 380–400. http://dx.doi.org/10.1007/s40544-020-0385-0.

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AbstractThe influence of structural factors on the lubrication performance of organic friction modifiers (OFMs) formulated in Group V (polyol ester oil) base oil was studied using a ball-on-disk tribometer. The results show that OFMs can mitigate friction under heavy loads, low sliding speeds, and high temperatures. These conditions are commonly encountered in internal-combustion engines between cylinder liners and piston rings. The reduction in friction is ascribed to the boundary lubrication film containing the OFM. The chemical composition analysis of the metal disk surface using energy dis

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19

Domínguez-García, S., L. Béjar-Gómez, R. Huirache-Acuna, J. Lara-Romero, and R. Maya-Yescas. "Delumping Strategy to Infer Lubrication Reaction Pathways in Internal Combustion Engines." International Journal of Chemical Reactor Engineering 18, no. 1 (2019). http://dx.doi.org/10.1515/ijcre-2019-0043.

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Abstract Lubricant reactions in internal combustion engines follow complex reaction pathways, in which oil (hydrocarbons) and additives form protecting films (known as tribofilms) on the surfaces of the cylinder-piston couple. Up-to-date there is not a fundamental model useful to describe the chemistry involved in formation of these tribofilms, and degradation of oils and additives as result of working time of the engine. One of the main problems associated is the impossible measuring of the actual phenomena inside the engine, at working conditions. In order to model formation of tribofilms, s

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