Influence of Al2O3 nanoparticles in a lubricating oil for reciprocating engines
The improvement of reciprocating engine efficiency, together with the responsible use of worldwide energy resourcesand the reduction of pollutant emissions, are significant challenges to be addressed by the automotive industry.Friction and wear problems directly affect the engine efficiency and cont...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/39259 |
| Acceso en línea: | https://hdl.handle.net/10578/39259 |
| Access Level: | acceso abierto |
| Palabra clave: | Alumina nanoparticles Friction Lubricant additives Nanotribology |
| Sumario: | The improvement of reciprocating engine efficiency, together with the responsible use of worldwide energy resourcesand the reduction of pollutant emissions, are significant challenges to be addressed by the automotive industry.Friction and wear problems directly affect the engine efficiency and continue to motivate the study of more effectivelubricants. The present work analyzes the contribution of the use of alumina nanoparticles (Al2O3) as additives in lubricating oil of SAE grade 5W30 to improve the efficiency of reciprocating engines. Sliding friction tests were carried outwith varying concentrations and size of Al2O3 nanoparticles in the base oil, mimicking the motion between the pistonrings and the cylinder liner via a universal tribometer and a High Frequency Reciprocating Rig (HFRR). Although the addition of Al2O3 nanoparticles always showed an improved tribological behavior compared to the base oil, the best strategyto get a better lubricating property was to add low concentration (0.05 wt.%) of larger sized nanoparticles (20 nm). Areduction in Coefficient of Friction (COF) up to 11% and 34%, compared to pure oil was achieved with the universaltribometer and the HFRR, respectively. The particularities of wear mechanisms and the lubricating properties of all samples under different test conditions are examined throughout this work. |
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