Coated Piston Ring Pack and Cylinder Liner Elastodynamics in Correlation to Piston Subsystem Elastohydrodynamic: Through FEA Modelling

Mishra, Prakash Chandra; Roychoudhury, Arka; Banerjee, Ayan; Saha, Nutan; Das, Sudhansu Ranjan; Das, Anshuman

doi:10.3390/lubricants11050192

Cited by 4 publications

(3 citation statements)

References 47 publications

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“…Under pure mechanical load, the deformation near the bo om of the skirt was the highest due to its low stiffness. Under the action of thermal load, the piston was expanded outward, while under the action of lateral thrust force, the influence of thermal and mechanical loads on the variation in piston deformation was partially offset by each other (6) In future work, the design of the shaped cylinder liner's profile based on the deformation results in this work could be carried out to reduce the friction on the pistoncylinder liner, and the work on the effect of the cylinder liner profile on friction could also be carried out.…”

Section: Discussionmentioning

confidence: 99%

“…Finite element analysis (FEA) has emerged as a powerful tool for studying cylinder liner deformation. Mishra et al [6] utilized the finite element method by applying boundary loads on the piston surface, neglecting friction effects, to analyze the influence of different piston crown structures on piston strength. Menacer et al [7] proposed a numerical model considering oil ring elastic deformation, dynamic motion, and mixed lubrication friction to investigate the friction forces in the piston ring-cylinder liner contact pair.…”

Section: Introductionmentioning

confidence: 99%

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Simulation Research on Cylinder Liner Shape and Position Tolerance under Thermo-Mechanical Load

Han,

Wang,

Wang

et al. 2024

Processes

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The cylinder liner bears alternating thermal load and mechanical load, and evaluating the cylinder liner deformation is a key issue in the design stage of an engine. In this work, the shape and position tolerance of the cylinder liner to various loads were studied based on the finite element method, the simplex algorithm and the least square method. Firstly, the heat transfer boundary conditions of the cylinder liner were obtained through combustion simulation. Combined with the mechanical load, the transient deformation of the cylinder liner under the thermo-mechanical load was obtained. Subsequently, the out-of-roundness and coaxiality were selected to evaluate the shape and position changes in the cylinder liner. Finally, the transient tolerance analysis of the cylinder liner under alternating thermo-mechanical load was carried out. The results show that the maximum out-of-roundness of the cylinder liner under thermal load, mechanical load and thermos-mechanical load was 15.12, 43.40 and 51.76 μm, respectively. The maximum coaxiality under thermal load, mechanical load and thermos-mechanical load were 6.17, 80.49 and 80.22 μm. The side thrust was more likely to cause uneven deformation of the cylinder liner section, the liner coaxiality was mainly affected by the cylinder burst pressure, and the liner shape tolerance was much more sensitive to the mechanical load than the mechanical load.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation Research on Cylinder Liner Shape and Position Tolerance under Thermo-Mechanical Load

Han,

Wang,

Wang

et al. 2024

Processes

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show abstract

“…From that aspect, the tribological optimization of the assembly, piston, piston rings, and cylinder liner in IC engines can contribute to the reduction in oil consumption from the lubrication system and, thus, PM emissions. The tribological optimization of this assembly contributes to the reduction in friction and wear, i.e., mechanical losses, which directly contributes to the reduction in fuel consumption and emissions [31,32].…”

Section: Introductionmentioning

confidence: 99%

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

Milojević,

Glišović,

Savić

et al. 2024

Atmosphere

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Regardless of the increasingly intensive application of vehicles with electric drives, internal combustion engines are still dominant as power units of mobile systems in various sectors of the economy. In order to reduce the emission of exhaust gases and satisfy legal regulations, as a temporary solution, hybrid drives with optimized internal combustion engines and their associated systems are increasingly being used. Application of the variable compression ratio and diesel fuel injection timing, as well as the tribological optimization of parts, contribute to the reduction in fuel consumption, partly due to the reduction in mechanical losses, which, according to test results, also results in the reduction in emissions. This manuscript presents the results of diesel engine testing on a test bench in laboratory conditions at different operating modes (compression ratio, fuel injection timing, engine speed, and load), which were processed using a zero-dimensional model of the combustion process. The test results should contribute to the optimization of the combustion process from the aspect of minimal particulate matter emission. As a special contribution, the results of tribological tests of materials for strengthening the sliding surface of the aluminum alloy piston and cylinder of the internal combustion engine and air compressors, which were obtained using a tribometer, are presented. In this way, tribological optimization should also contribute to the reduction in particulate matter emissions due to the reduction in fuel consumption, and thus emissions due to the reduction in friction, as well as the recorded reduction in the wear of materials that are in sliding contact. In this way, it contributes to the reduction in harmful gases in the air.

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A Comparative Analysis of Friction and Energy Losses in Hydrogen and CNG Fueled Engines: Implications on the Top Compression Ring Design Using Steel, Cast Iron, and Silicon Nitride Materials

Nikolopoulou,

Zavos,

Nikolakopoulos

2024

Materials

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Optimizing the design of the top compression ring holds immense importance in reducing friction across both traditional Internal Combustion (IC) engines and hybrid power systems. This study investigates the impact of alternative fuels, specifically hydrogen and CNG, on the behavior of top piston rings within internal combustion (IC) engines. The goal of this approach is to understand the complex interplay between blow-by, fuel type, material behavior, and their effects on ring friction, energy losses, and resulting ring strength. Two types of IC engines were analyzed, taking into account flow conditions derived from in-cylinder pressures and piston geometry. Following ISO 6622-2:2013 guidelines, thick top compression rings made from varying materials (steel, cast iron, and silicon nitride) were investigated and compared. Through a quasi-static ring model within Computational Fluid Dynamics (CFD), critical tribological parameters such as the minimum film and ring friction were simulated, revealing that lighter hydrogen-powered engines with higher combustion pressures could potentially experience approximately 34.7% greater power losses compared to their heavier CNG counterparts. By delving into the interaction among the fuel delivery system, gas blow-by, and material properties, this study unveils valuable insights into the tribological and structural behavior of the top piston ring conjunction. Notably, the silicon nitride material demonstrates promising strength improvements, while the adoption of Direct Injection (DI) is associated with approximately 10.1% higher energy losses compared to PFI. Such findings carry significant implications for enhancing engine efficiency and promoting sustainable energy utilization.

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Coated Piston Ring Pack and Cylinder Liner Elastodynamics in Correlation to Piston Subsystem Elastohydrodynamic: Through FEA Modelling

Cited by 4 publications

References 47 publications

Simulation Research on Cylinder Liner Shape and Position Tolerance under Thermo-Mechanical Load

Simulation Research on Cylinder Liner Shape and Position Tolerance under Thermo-Mechanical Load

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

A Comparative Analysis of Friction and Energy Losses in Hydrogen and CNG Fueled Engines: Implications on the Top Compression Ring Design Using Steel, Cast Iron, and Silicon Nitride Materials

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