Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/21705
Title: Impact of influence of piston design parameters on the hydrodynamic characteristics of internal combustion engines—a numerical study
Authors: Menacer, Brahim
narayan, s
Tuninetti, Víctor
Khatir, Tawfiq
Oñate Soto, Angelo
Osorio Laurencio, Liomnis
Abubakar, Shitu
Samuel, Joseph
Grujic, Ivan
Stojanovic, Nadica
Kaisan, Muhammad Usman
Journal: Lubricants
Issue Date: 2024
Abstract: Piston top rings in the combustion engine play a crucial role in the overall hydrodynamic performance of engines, such as power loss, minimum film thickness and friction forces, by ensuring sealing and minimizing the leakage of burnt gases. This present paper examines the influence of four key parameters of the top ring, such as ring width, ring temperature, ring tension, and ring surface roughness on the hydrodynamic behavior at the ring/cylinder contact. These parameters play a significant role in the formation and maintenance of the oil film, directly influencing hydrodynamic indicators such as the minimum oil film thickness, friction force, power loss, oil pressure, and the ring angle twist. This article relies on hydrodynamic models and numerical simulations performed using GT-SUITE version 6 software to analyze these effects. The pressure curve used in this simulation is experimentally validated for an engine speed of 2000 RPM. It was found that an increase in the top ring temperature reduces the oil’s viscosity, decreasing the film thickness and increasing the risk of metal-to-metal contact. Increasing the roughness of the ring enhances oil film stability, especially at the bottom dead center (BDC) points during each phase of the operating cycle. Further, three different types of ring profiles were investigated for friction forces by varying the speed of the engine.
URI: https://scidar.kg.ac.rs/handle/123456789/21705
Type: article
DOI: 10.3390/lubricants12120427
ISSN: 2075-4442
Appears in Collections:Faculty of Engineering, Kragujevac

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