Investigation of PVD Piston Ring Coatings With Different Lubricant Formulations

Tomanik, Eduardo; Fujita, Hiroshi; Sato, Shinya; Paes, Eliel; Galvão, Ciro; Morais, Paulo

doi:10.1115/icef2017-3559

Cited by 9 publications

(2 citation statements)

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“…Piston rings with CrTiN composite films demonstrate superior hardness and wear resistance at high temperatures [18]. Additionally, coatings with high molybdenum content additives [19] or CrMoN/MoS2 [20] contribute to enhancing the wear resistance and hardness of piston rings. Surface spraying with molybdenum strengthens high-temperature resistance, wear resistance, and oil storage capacity in piston rings.…”

Section: Introductionmentioning

confidence: 99%

Bionic Design and Optimization of the Wear-Resistant Structure of Piston Rings in Internal Combustion Engines

Tian,

Zhang,

Zhou

et al. 2023

Lubricants

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Internal combustion engines, during their operation, subject the piston to high-temperature and high-pressure conditions, requiring it to endure intense, continuous reciprocating motion. This strenuous process leads to significant wear and tear. Among the engine’s crucial components, the piston ring plays a pivotal role but is particularly susceptible to wear. Therefore, extensive research has been devoted to investigating the wear of piston rings, a critical sealing component within internal combustion engines. To address the high cost of existing coating methods, which hinders widespread application, we propose a bionic design approach inspired by groove structures observed on earthworm bodies, aimed at enhancing the wear resistance of piston rings. Bionic piston rings featuring optimally designed groove structures inspired by the earthworm’s anatomy were designed. These rings exhibited varying groove depths (1 mm, 2 mm, and 3 mm), groove widths (0.1 mm, 0.3 mm, and 0.5 mm), and groove spacings (0.1 mm, 0.2 mm, and 0.3 mm). We conducted thermal–structural coupling analyses on both standard piston rings and these bionic counterparts. The results revealed that the maximum stress was concentrated at the first piston ring, precisely at the opposing region of the end gap. Thus, the initial piston ring endured the primary frictional losses. Moreover, a comparison of stress levels between bionic rings and the standard ring revealed that the bionic groove structure substantially reduced stress and minimized stress concentration, thus enhancing wear resistance. Groove width had the most notable influence on wear performance, followed by groove depth and groove spacing. Optimal wear resistance was achieved when the groove depth was 3 mm, groove width was 0.1 mm, and groove spacing was 0.1 mm. Subsequently, we constructed a piston ring friction test bench to validate the wear resistance of the most effective piston ring. The results indicated that the wear resistance of the bionic piston ring exceeded that of the standard piston ring by up to 19.627%. Therefore, incorporating a bionic groove structure within the piston ring can effectively reduce surface friction and enhance wear resistance. This, in turn, can enhance the operational lifespan of internal combustion engines under favorable working conditions.

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Section: Introductionmentioning

confidence: 99%

Bionic Design and Optimization of the Wear-Resistant Structure of Piston Rings in Internal Combustion Engines

Tian,

Zhang,

Zhou

et al. 2023

Lubricants

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show abstract

“…Including in the engine new types of surface coatings which provides very low coefficient of friction and wear [38][39][40]. 2.2.6 Engine oil properties 2.2.6.1 Introduction In an ICE, the engine oil have the function of reducing the friction between two tribological mechanical parts and providing a longer life of the mechanism, that is, reducing the wear.…”

Section: Boundary Lubricationmentioning

confidence: 99%

Assessment and Optimization of Friction Losses and Mechanical Efficiency in Internal Combustion Engines

Reyes¹

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Brake Mean Effective Pressure BSFC Brake Specific Fuel Consumption CAD Crank Angle Degree CAN Controller Area Network CGS Centimetre-gram-second CI Compression Ignition CoF Coefficient of Friction CPU Central Processing Unit DOC Diesel Oxidation Catalyst DI Direct Injection DPF Diesel Particulate Filter ECU Electronic Control Unit EGR Exhaust Gas Recirculation EHD Elastohydrodinamic EHL Elastohydrodinamic lubrication EP Extreme-pressure FMEP Friction Mean Effective Pressure FWD Front Wheel Drive GCI Gray Cast Iron GDI Gasoline Direct Injection GHG Greenhouses Gases GNP Gross National Product WCAC Water Cooled Air Cooler WLTC Worldwide Harmonized Light Vehicles Test Cycle ZDDP zinc dialkyl dithiophosphates

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Combined lubricant–surface system approach for potential passenger car CO2 reduction on piston-ring-cylinder bore assembly

Tomanik

Profito

Sheets³

et al. 2020

Tribology International

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Investigation of PVD Piston Ring Coatings With Different Lubricant Formulations

Cited by 9 publications

References 0 publications

Bionic Design and Optimization of the Wear-Resistant Structure of Piston Rings in Internal Combustion Engines

Bionic Design and Optimization of the Wear-Resistant Structure of Piston Rings in Internal Combustion Engines

Assessment and Optimization of Friction Losses and Mechanical Efficiency in Internal Combustion Engines

Combined lubricant–surface system approach for potential passenger car CO2 reduction on piston-ring-cylinder bore assembly

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