scholarly journals Design and Analysis of Piston Rings by Using Hyper Elastic Materials of Dynamic Engine Assembly

2021 ◽  
Vol 9 (VII) ◽  
pp. 1808-1815
Author(s):  
E Krishna Srinivas
Keyword(s):  
Piston Ring ◽  
Combustion Engine ◽  
Piston Rings ◽  
Entire Surface ◽  
Modeling And Analysis ◽  
Oil Film ◽  
Materials Behaviors ◽  
Composition Materials ◽  
Hyper Elastic ◽  
Stress And Deformation

The piston ring is one of the main components of an internal combustion engine. Its main purposes are to seal the combustion chamber of engine. The main objective of this work is to develop the design modeling and then analysis of stress and deformation of the piston rings by using different materials like Grey cast iron, elastomer and Titanium alloy by using ansys software and to investigate these three materials behavior which are used for the piston ring. The project shows the components involved in the single cylinder engine assembly and their operation. Finally we are checking out three materials behaviors which are used for piston rings. This research paper deals with to reduce the friction of a piston ring while maintaining a Large oil film load-carrying capacity, an approach comprising of the inverse method, modeling and analysis of piston rings using Structural and rigid dynamics is deliberated in order to quantify the stress that the rings can bear. Many researchers had considered that the entire surface of the ring was enveloped in an oil film, but much experimental research has discovered that not all the entire surface was soaked. The various parameters studied under structural analysis are displacement and ultimate stress limit using three Different composition materials. A cumulative analysis is performed which considers the combined effect of mechanical and load for determination of the dimensions of the rings.

scholarly journals Numerical analysis of piston ring pack operation

2009 ◽  
Vol 137 (2) ◽  
pp. 128-141
Author(s):  
Andrzej WOLFF
Keyword(s):  
Mathematical Model ◽  
Gas Flow ◽  
Piston Ring ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Labyrinth Seal ◽  
Piston Rings ◽  
Oil Film ◽  
Piston Ring Pack ◽  
Ring Pack

In the paper a model of a piston ring pack motion on an oil film has been analysed. The local oil film thickness can be compared to height of the combined roughness of mating surfaces of piston rings and cylinder liner. Equations describing the mixed lubrication problem based on the empirical mathematical model formulated in works of Patir, Cheng [6, 7] and Greenwood, Tripp [3] have been combined [12] and used in this paper. A model of a gas flow through the labyrinth seal of piston rings has been developed [13, 15]. In addition models of ring twist effects and axial ring motion in piston grooves have been applied [14, 15]. In contrast to the previous papers of the author, an experimental verification of the main parts of developed mathematical model and software has been presented. A relatively good compatibility between the experimental measurements and calculated results has been achieved. In addition this study presents the simulation results for an automobile internal combustion engine

scholarly journals ANALISIS PERUBAHAN KEKERASAN YANG TERJADI PADA CINCIN TORAK AKIBAT PERUBAHAN JARAK TEMPUH PADA MOTOR YAMAHA MIO SOUL GT

2021 ◽  
pp. 32-37
Keyword(s):  
Combustion Chamber ◽  
Change Process ◽  
Fracture Process ◽  
Piston Ring ◽  
Combustion Engine ◽  
Energy Transfer Process ◽  
Piston Rings ◽  
Stiff Material ◽  
Piston Ring Lubrication

In a four stroke combustion engine, there are three piston rings, namely two compression piston rings and one lubrication control piston ring. The piston compression ring serves to maintain the combustion pressure, while the piston ring lubrication regulator functions to lubricate the combustion chamber during the energy change process so that the piston will run back and forth in the combustion chamber smoothly. Damage that occurs to the piston ring can be in the form of a broken piston ring, or a scratched or worn piston ring. These things can reduce the quality of the energy transfer process. The piston ring is broken because the ring is too brittle. Vibration that occurs in the piston when combustion occurs at full load increases the possibility of a fracture process in the piston ring. The brittleness of the piston ring is strongly influenced by the material used. To overcome this, a hard but not stiff material is needed. Keywords: Hardness, mileage, Vicker test

scholarly journals Research and analysis of the results from the tribotester test for piston

2017 ◽  
Vol 169 (2) ◽  
pp. 14-17
Author(s):  
Joanna BORKOWSKA ◽  
Andrzej KAŹMIERCZAK
Keyword(s):  
Piston Ring ◽  
Technology Development ◽  
Combustion Engine ◽  
Protective Coatings ◽  
Diamond Powder ◽  
Block Type ◽  
Piston Rings ◽  
Coating Technology ◽  
Hard Materials ◽  
Sealing Ring

Piston – ring – cylinder assembly of combustion engine has a lot of friction pairs examples, also one of them which decide about fastness to wear, it means first sealing ring – cylinder, called further very simply ring – cylinder unit. During work of this unit we can observe wear of piston, precisely – of coating which is deposited on ring to prolong service life. Objective of this work was to realize a test of roll-block type on tribotester to set durability of piston sample. Within the framework of this test were investigated a prototyped piston’s rings with diamond embankment. Piston rings are made of diamond coating technology with a porous chromium coating, where in pores is deposited on said diamond powder with a grain size about 1 micron. The work will be carried out of an analysis of collaboration piston – rings – cylinder unit in internal combustion engine and an analysis of the use of hard materials in friction pairs, including powders. The work aims to show the possibilities and benefits of the application of new protective coatings to reduce their wearing, which is consistent with the observed trend of technology development.

First Paper: Measurement of the Oil-Film Thickness between the Piston Rings and Liner of a Small Diesel Engine

1974 ◽  
Vol 188 (1) ◽  
pp. 253-261 ◽  
Author(s):  
G. M. Hamilton ◽  
S. L. Moore
Keyword(s):  
Diesel Engine ◽  
Film Thickness ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Piston Rings ◽  
Oil Film

A capacity gauge has been designed for operating in the conditions of a working engine. The method of using it for determining the oil-film thickness and piston-ring profile is described. Oil-film thicknesses in the range 0·4-2·5 μm between the piston rings and the cylinder liner have been observed. Their variation with speed, load and temperature has been measured and it is concluded that their behaviour is essentially hydrodynamic.

Metal Transfer from Piston Rings to Cylinders during “Run-in”

1949 ◽  
Vol 3 (1) ◽  
pp. 169-175
Author(s):  
C. D. Strang ◽  
J. T. Burwell
Keyword(s):  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Piston Ring ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Cylinder Wall ◽  
Piston Rings ◽  
Engine Operation ◽  
Small Water ◽  
Engine Cylinder

Piston rings with radio-active wearing-surfaces were used to study the micro-welding between rings and cylinder wall during “run-in” in a small, water-cooled, internal combustion engine. The results indicated that micro-welding and the accompanying transfer of metal were present under the mildest conditions of engine operation, including motoring with the engine cylinder-head removed. The distribution of micro-welding along the ring-travel was found to correspond to the wear profile observed in engine cylinders by other workers. Such transferred material may play a part in the formation of the “glazed” layer which is said to be present on “run-in” cylinder walls and rings. The presence of transferred metal at all points along the ring-travel indicates that the piston ring was not fully supported by a hydrodynamic oil film of sufficient thickness to separate completely the surfaces of the ring and the cylinder wall.

Second Paper: Comparison between Measured and Calculated Thicknesses of the Oil-Film Lubricating Piston Rings

1974 ◽  
Vol 188 (1) ◽  
pp. 262-268 ◽  
Author(s):  
G. M. Hamilton ◽  
S. L. Moore
Keyword(s):  
Iterative Method ◽  
Film Thickness ◽  
Piston Ring ◽  
Complete Agreement ◽  
Hydrodynamic Equations ◽  
Piston Rings ◽  
Oil Film ◽  
Single Ring

An iterative method of solving the hydrodynamic equations of lubrication of a piston ring is described. Some results of the calculations are compared with the measured values of the oil-film thickness in an actual engine. It is shown that there are disagreements of up to a factor of 8 between the theoretical and measured values. Further experiments were carried out on a single ring in a motored rig and here it was shown that although the film thickness is considerably greater, it is still not in complete agreement with the theory.

scholarly journals Mathematical Model of Piston Ring Sealing in Combustion Engine

2015 ◽  
Vol 21 (4) ◽  
pp. 66-78 ◽  
Author(s):  
Grzegorz Koszałka ◽  
Mirosław Guzik
Keyword(s):  
Mathematical Model ◽  
Heat Exchange ◽  
Numerical Solution ◽  
Gas Flow ◽  
Piston Ring ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Computer Application ◽  
Piston Rings ◽  
Flow Through

Abstract This paper presents a mathematical model of piston-rings-cylinder sealing (TPC) of a combustion engine. The developed model is an itegrated model of gas flow through gaps in TPC unit, displacements and twisting motions of piston rings in ring grooves as well as generation of oil film between ring face surfaces and cylinder liner. Thermal deformations and wear of TPC unit elements as well as heat exchange between flowing gas and surrounding walls, were taken into account in the model. The paper contains descriptions of: assumptions used for developing the model, the model itself, its numerical solution as well as its computer application for carrying out simulation tests.

The Simple Model of the Oil Film Thickness between Piston Ring and Cylinder

2010 ◽  
Vol 97-101 ◽  
pp. 1239-1242
Author(s):  
De Liang Liu ◽  
Hui Biao Lu ◽  
C.G. Sun
Keyword(s):  
Film Thickness ◽  
Internal Combustion Engine ◽  
Piston Ring ◽  
Reynolds Equation ◽  
Combustion Engine ◽  
Friction Pair ◽  
Internal Combustion ◽  
Theoretical Research ◽  
Lubricating Oil ◽  
Oil Film

Piston ring-cylinder is one of the most important friction pair of internal combustion engine，the lubricating state between them has decided internal combustion engine lubrication quality. So the theoretical research to the lubricating characteristics of the piston-ring group, especially the calculation of the lubricating oil film thickness is very important. The oil film thickness between piston-ring and cylinder is studied by calculation method. The calculation program is developed with average Reynolds equation taken the surface topography, viscosity-temperature effect, viscosity-pressure effect, extrusion effect and other factors into account. The position of oil outlet point is preinstalled, the full lubrication is assumed, and the Reynolds equation is solved by full pivot element gausses elimination approach, so the iterative course and calculation workload are reduced, and a great lot of the calculating time is saved, the oil film thickness of full period can be more accurately predicted by the ordinary PC within 30 minutes, which can supply quick effective evidence for next calculation and analysis.

Effects of surface texturing on the tribological behavior of piston rings under lubricated conditions

2016 ◽  
Vol 68 (2) ◽  
pp. 158-169 ◽  
Author(s):  
Yali Zhang ◽  
Xiaogang Zhang ◽  
Tonghai Wu ◽  
You-bai Xie
Keyword(s):  
Piston Ring ◽  
Combustion Engine ◽  
Surface Texturing ◽  
Cylinder Liner ◽  
Economic Benefits ◽  
Friction Reduction ◽  
Total Efficiency ◽  
Piston Rings ◽  
Content Type ◽  
Friction Performance

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 this paper, an experimental study using a pin-on-disk tribometer was carried out to evaluate the effects of surface texturing on friction reduction of piston rings under various loads and sliding velocities. Rectangular- and circular-shaped textures with different depths and area densities were produced by a Femtosecond laser. Comparison experiments were conducted with un-textured rings. Findings – The results indicate that the friction performance of the ring surface was significantly improved by surface texturing, and the running-in stage was also shortened. More specifically, it was found that the rectangular-shaped texture had a better effect on friction reduction than the circular-shaped texture. Results also indicate that an optimum texture density existed for the rectangular-shaped texture. Additionally, it was observed that the average friction coefficient reduction of the textured ring decreased with increasing load and increased with increasing sliding velocity. Originality/value – Consequently, these findings provide a more in-depth understanding of the relationship between micro-textures and tribological properties of piston rings in lubricating sliding.

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