Low friction tribofilm formation and distribution on an engine cylinder tested with MoDTC-containing low viscosity engine lubricants

Vaitkūnaitė, Gerda; Espejo, Cayetano; Thiébaut, Benoît; Neville, Anne; Morina, Ardian

doi:10.1016/j.triboint.2022.107551

Cited by 18 publications

(5 citation statements)

References 39 publications

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“…Through the test equipment of the engine reverse towing test, the fuel consumption rate test on the engine piston ring-cylinder liner assembly friction loss change law has a more clear and practical understanding [18,19]. First, the friction torque of unwoven and woven cylinder liners at different oil temperatures is compared through a reverse towing test.…”

Section: Engine Stand Testmentioning

confidence: 99%

Influence of Liner Surface with Parameterized Pit Texture on the Friction Characteristics of Piston Rings

Zhang,

Gong,

Liu

et al. 2024

Processes

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The arrangement of a pit-shaped surface texture on the surface of a cylinder liner significantly affects reductions in piston ring friction, and the influence of the structural parameters and spatial distribution on piston ring friction power consumption is unclear. In this paper, the diameter, depth, axial spacing distance, and radial spacing distance of the pits on the inner surface of a cylinder liner were used as variable parameters to process the surface textures of different schemes, and then a friction and wear test was carried out on UMT piston ring–cylinder liner specimens, several texture schemes with the best anti-friction effect were selected, an engine bench test was carried out by comparing these texture schemes with non-texture schemes, and the frictional torque and fuel consumption of the engine were studied at different oil temperatures. The results show that the depth of the pits in the surface texture of a cylinder liner has a greater influence on the friction reduction effect, followed by the radius. The higher the oil temperature in the engine bench test, the greater the impact of the surface texture. The reduction in fuel consumption was greater in the lower-speed region after structuring the textured cylinder liner compared to the non-textured cylinder liner. Specifically, the friction coefficient was mainly affected by the depth of the pits, and the depths of the pits in the texture schemes with good friction reduction effect were all 17–19 μm. The best friction reduction could be achieved when the pit radius is around 50 μm, with little difference in pit depth. When the oil temperature was 95 °C, the average drag torque reduction was about 1.69 Nm; when the oil temperature was 105 °C, the decrease was about 2.54 Nm; and when the oil temperature was 105 °C, the decrease was about 4.53 Nm. After adding the surface texture of the cylinder liner, the fuel consumption rate of the engine equipped with the structured cylinder liner was generally reduced compared with that of the original cylinder liner engine. Among them, the average and subsequent consumption rate of surface assembly scheme 11 decreased the most, with a value of 1.3 g/kwh.

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Section: Engine Stand Testmentioning

confidence: 99%

Influence of Liner Surface with Parameterized Pit Texture on the Friction Characteristics of Piston Rings

Zhang,

Gong,

Liu

et al. 2024

Processes

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“…Increasing the engine speed may reduce the heat transfer loss while leading to an increase in mechanical loss. Using pistons with thermal insulation coating materials [33][34][35] and employing low-friction lubricants [36][37][38]…”

Section: Efficienciesmentioning

confidence: 99%

Future High-Efficiency and Zero-Emission Argon Power Cycle Engines: A Review

Wang¹,

Jin²,

Deng³

et al. 2023

IJAMM

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Review Future High-Efficiency and Zero-Emission Argon Power Cycle Engines: A Review Chenxu Wang , Shaoye Jin , Jun Deng , Weiqi Ding , Yongjian Tang , and Liguang Li ,* School of Automotive Studies, Tongji University, Shanghai 200092, China * Correspondence: liguang@tongji.edu.cn Received: 27 February 2023 Accepted: 23 May 2023 Published: 13 June 2023 Abstract: This paper reviews the theoretical and experimental researches on Argon Power Cycle (APC) engines. Hydrogen-fueled APC is an innovative power system for a high efficiency and zero emissions, which employs argon rather than nitrogen as a diluent. Due to the large specific heat ratio of argon, the thermodynamic efficiency of APC engines is significantly higher compared to conventional internal combustion engines. However, APC engines face the challenge of knock inhibition, especially when using hydrogen as a fuel. Therefore, this paper summarizes the strategies and technologies to suppress the knock of hydrogen-fueled APC engines, including using alternative fuels with greater anti-knock capacity, lean combustion, and water injection. Furthermore, some guidance opinions are also provided for reference about the development and industrialization of APC engines, such as ultra-lean combustion, which uses pistons with thermal insulation coatings, employing low-friction lubricants, and developing efficient multi-component membrane separation system for argon separation.

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“…In addition, in the field of engine wear reduction, engines generally use oil to achieve the purpose of anti-friction lubrication in service. To ensure the normal lubrication of each friction pair, properly reducing the oil viscosity could reduce the friction loss of components under fluid lubrication [23,24]. Similarly, the polysaccharide lubricant coated on the PDMS substrate could prevent the substrate's friction loss while ensuring the lubrication performance.…”

Section: Ftir Spectra and Viscosity Of Dipsmentioning

confidence: 99%

Eco-friendly polysaccharide coatings for antifouling and drag-reduction and potential application for marine devices

Yang,

Qin,

Zhao

et al. 2023

Friction

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Traditional antifouling agents usually have a certain toxic effect on marine environments and non-target organisms. In this study, Dictyophora indusiata polysaccharide (DIP) was applied as a natural antifouling surface modifier to prepare the surface coating for marine antifouling. Three DIP coatings were prepared: D. indusiata spore polysaccharide (DISP), D. indusiata volva polysaccharide (DIVP), and D. indusiata embryonic body polysaccharide (DIEP). The antifouling, tribological, and anticorrosion behavior of the coatings were examined. Results revealed that the three kinds of DIP coatings had excellent antifouling properties, which could effectively prevent the adhesion of Chlorella and the attachment of water-based and oily stains on the surface. Additionally, the coatings showed great mechanical stability and could maintain an extremely low coefficient of friction (COF < 0.05) after continuous wear. The drag reduction rate of the coated surfaces reached 5%, showing a powerful lubrication performance. Furthermore, the DIP coatings presented an outstanding corrosion resistance, where the equivalent circuit impedances were 4–9 orders of magnitude higher than the control groups. This research showed a promising prospect of surface coating fabrication with DIP for marine devices to achieve the purpose of antifouling and drag reduction.

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Low friction tribofilm formation and distribution on an engine cylinder tested with MoDTC-containing low viscosity engine lubricants

Cited by 18 publications

References 39 publications

Influence of Liner Surface with Parameterized Pit Texture on the Friction Characteristics of Piston Rings

Influence of Liner Surface with Parameterized Pit Texture on the Friction Characteristics of Piston Rings

Future High-Efficiency and Zero-Emission Argon Power Cycle Engines: A Review

Eco-friendly polysaccharide coatings for antifouling and drag-reduction and potential application for marine devices

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