Friction and wear studies between cylinder liner and piston ring pair using Taguchi design method

2011 ◽  
Vol 42 (8) ◽  
pp. 595-603 ◽  
Author(s):  
Murat Kapsiz ◽  
Mesut Durat ◽  
Ferit Ficici
Keyword(s):  
Friction And Wear ◽  
Piston Ring ◽  
Design Method ◽  
Cylinder Liner ◽  
Taguchi Design ◽  
Ring Pair

Influence of positive texturing on friction and wear properties of piston ring-cylinder liner tribo pair under lubricated conditions

2019 ◽  
Vol 71 (4) ◽  
pp. 515-524 ◽  
Author(s):  
Venkateswara Babu P. ◽  
Ismail Syed ◽  
Satish Ben Beera
Keyword(s):  
Wear Resistance ◽  
Internal Combustion Engine ◽  
Friction And Wear ◽  
Piston Ring ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
Tribological Performance ◽  
Friction Reduction ◽  
Content Type

Purpose In an internal combustion engine, piston ring-cylinder liner tribo pair is one among the most critical rubbing pairs. Most of the energy produced by an internal combustion engine is dissipated as frictional losses of which major portion is contributed by the piston ring-cylinder liner tribo pair. Hence, proper design of tribological parameters of piston ring-cylinder liner pair is essential and can effectively reduce the friction and wear, thereby improving the tribological performance of the engine. This paper aims to use surface texturing, an effective and feasible method, to improve the tribological performance of piston ring-cylinder liner tribo pair. Design/methodology/approach In this paper, influence of positive texturing (protruding) on friction reduction and wear resistance of piston ring surfaces was studied. The square-shaped positive textures were fabricated on piston ring surface by chemical etching method, and the experiments were conducted with textured piston ring surfaces against un-textured cylinder liner surface on pin-on-disc apparatus by continuous supply of lubricant at the inlet of contact zone. The parameters varied in this study are area density and normal load at a constant sliding speed. A comparison was made between the tribological properties of textured and un-textured piston ring surfaces. Findings From the experimental results, the tribological performance of the textured piston ring-cylinder liner tribo pair was significantly improved over a un-textured tribo pair. A maximum friction reduction of 67.6 per cent and wear resistance of 81.6 per cent were observed with textured ring surfaces as compared to un-textured ring surfaces. Originality/value This experimental study is helpful for better understanding of the potency of positive texturing on friction reduction and wear resistance of piston ring-cylinder liner tribo pair under lubricated sliding conditions.

Numerical Simulation on the Lubrication Performance of Surface Textured Piston Rings

2011 ◽  
Vol 199-200 ◽  
pp. 734-738 ◽  
Author(s):  
Qiu Ying Chang ◽  
Xian Liang Zheng ◽  
Qing Liu
Keyword(s):  
Numerical Simulation ◽  
Film Thickness ◽  
Friction Force ◽  
Friction And Wear ◽  
Piston Ring ◽  
Hydrodynamic Lubrication ◽  
Cylinder Liner ◽  
Area Density ◽  
Oil Film ◽  
Lubrication Performance

Surface texturing has been successfully employed in some tribological applications in order to diminish friction and wear. This technology may be used in a piston ring to decrease the friction and wear of the contact between a piston ring and cylinder liner. A numerical simulation of lubrication between a surface textured piston ring and cylinder liner based on the hydrodynamic lubrication theory was conducted. The influence of surface texture parameters on piston ring lubrication performance was obtained by solving the mathematical equations with a multi-grid method. The results show that under the micro-dimple area density of 5%-40% the minimum oil film thickness increases and the dimensionless friction force decreases with the increasing of it. Under the dimple area density of 40%-60%, the minimum oil film thickness and the dimensionless friction force change slightly. Under various dimple area densities the optimum dimple depth at the given working condition in this paper is about 5µm.

Experimental research on the wall-wetting effects on the frictional property of the cylinder liner–piston ring pair

2021 ◽  
pp. 135065012110240
Author(s):  
Bo Xu ◽  
Bifeng Yin ◽  
Hekun Jia ◽  
Mingliang Wei ◽  
Kunpeng Shi
Keyword(s):  
Friction Force ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Mixed Lubrication ◽  
Lubricating Oil ◽  
Stribeck Curve ◽  
Frictional Property ◽  
Negative Effects ◽  
Wall Wetting ◽  
Ring Pair

The application of novel injection strategies (high-pressure injection, early injection, retarded injection, etc.) in combustion engines has made the wall-wetting problem severer. As the splashed fuel dilutes the lubricating oil, the tribological performance of the cylinder liner–piston ring pair will be affected. In this research, the viscosity and wettability tests were conducted firstly by mixing diesel into lubrication oil. It was found that the dynamic viscosity of the mixture drops with more fuel diluting the oil, and a small quantity of diesel mixed will cause a remarkable decline in lubricant viscosity; also, the contact angle shows a downward trend with the increasing diluting ratio. Then based on several typical diluting ratios, the reciprocating friction tests were carried out to measure the instantaneous friction force of the production ring/liner pair. The experimental results showed that under a mixed lubrication state, the peak friction force of the ring/liner pair occurs around the dead centers, while the minimum force occurs at the middle position of the reciprocating stroke; with more fuel diluting the oil, the bearing capacity of oil film degrades, resulting in the increase of friction force. In addition, the average friction coefficient of the ring/liner pair shows an upward trend with the increasing diluting ratio, and the Stribeck curve moves toward the upper-left, which means the lubrication condition of this pair tends to transit from mixed lubrication to boundary lubrication, causing negative effects on the frictional property of the cylinder liner–piston ring pair. Therefore, the diluting ratio should be controlled under 20%.

scholarly journals Optimization and Modelling of the Wear in Piston Ring and Cylinder Liner Using Taguchi Method and Artificial Neural Networks

2021 ◽  
Author(s):  
Idris cesur ◽  
Aslan Çoban ◽  
Beytullah Eren
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Diesel Fuel ◽  
Alternative Energy ◽  
Internal Combustion Engines ◽  
Friction And Wear ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Biodiesel Fuel ◽  
Artificial Neural

Abstract Alternative energy sources are needed to meet the energy needs of the rapidly increasing population and developing industry and to increase the efficiency of the systems. In internal combustion engines, biodiesel is used as an alternative fuel for both being an alternative energy source and having a better efficiency compared to diesel fuel. Efficiency loss in the engines is largely due to friction and wear between the piston ring (PR) and the cylinder liner (CL). Different lubrication regimes in engines have substantial effects on wear and friction. In the present study, the effects of diesel and biodiesel (chicken oil methyl ester, COME) fuels on friction and wear in different loads (40-60-80-100 N) and speeds (60-90-120-150 rpm) were examined using the Taguchi experimental design method. In addition, an artificial neural networks (ANNs) model is utilized for modeling the wear at the cylinder liner (CL) and the piston rings (PR) using different fuel types, speeds and loads. As a result of the study, biodiesel fuel has a lower friction coefficient and abrasion in all load and cycle intervals due to its high viscosity and lubrication properties compared to diesel fuel. Besides, the developed ANN model has good predictive capability for the wear at the CL and the PR according to perfect match between experimental and modeling results.

Tribological evaluation of piston ring/cylinder liner assembly in automotive engines using GNP as a lubricant additive

2021 ◽  
pp. 095440622110553
Author(s):  
Gurtej Singh ◽  
Mohammad Farooq Wani ◽  
Mohammad Marouf Wani
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Piston Ring ◽  
Film Formation ◽  
Cylinder Liner ◽  
Lubricant Additive ◽  
Operating Conditions ◽  
Power Losses ◽  
Automotive Engines ◽  
The Coefficient Of Friction

Friction and wear are the main causes of energy dissipation in automotive engines. To minimize the frictional power losses, it is extremely important to improve the tribological characteristics of ring/liner assembly which accounts for almost 40–50% frictional power losses. The present study attempts to mitigate friction and wear of the ring/liner tribo-pair using GNP/SAE 15W40 nano-lubricant. To simulate the ring/liner interface, the tribological performance of nano-lubricants was assessed using a tribometer based on ASTMG181 standard under various operating conditions. The coefficient of friction (COF) and wear rate lowered using graphene nano-lubricants (GNL). The tribological results showed that friction coefficient, wear rate, and surface roughness of piston ring improved in the range 17.71%–42.33%, 25%–40.62%, and 61%, respectively, under GNL lubricating conditions during the boundary lubrication. Further, the characterization of wear tracks of piston ring and cylinder liner confirmed tribo-film formation on worn surfaces resulting in decreased COF and wear rate.

EXPERIMENTAL INVESTIGATION TO ENHANCE THE TRIBOLOGICAL CHARACTERISTICS OF A LUBRICANT USING NANOPARTICLE ADDITIVE

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Santhosh V ◽  
Babu N
Keyword(s):  
Experimental Investigation ◽  
Friction And Wear ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Cuo Nanoparticles ◽  
Effective Combination ◽  
Performance And Emissions ◽  
Pin On Disc ◽  
Wear Tests ◽  
Friction And Wear Tests

Copper oxide (CuO) nanoparticles were found to be an excellent additive to the lubricant in order to reduce the friction and wear between piston ring and cylinder liner. Friction and wear tests have been done experimentally using a pin on disc machine. Input parameters like load, speed, distance travelled are varied for each test, so that an effective combination for the minimal friction and wear have been obtained. The effect of adding additive is also found by varying the percentage of the nanoparticle in the lubricant. Also, after the best ratio for the additive in lubricant is selected, it can be used to run the engine in the laboratory, so that the performance and emissions of the engine with the new lubricant can be obtained. Finally, comparison can be made with the engine using existing lubricant.

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