Superlubricity in the real automotive world - 2nd International Workshop

• Processo: 18/01256-2
• Modalidade de apoio: Auxílio Organização - Reunião Científica
• Data de Início da vigência: 08 de maio de 2018
• Data de Término da vigência: 09 de maio de 2018
• Área do conhecimento: Interdisciplinar
• Pesquisador responsável: Roberto Martins de Souza
• Beneficiário: Roberto Martins de Souza
• Instituição Sede: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brasil
• Assunto(s): Tribologia Filmes finos de carbono tipo diamante (DLC)
• Palavra(s)-Chave do Pesquisador: Dlc | Friction | Lubricant | Surface | Tribology | Tribologia

Resumo

The "superlubricity" phenomenon (SL for short), lubricant regimes when friction coefficient vanishes to ultra-low values, is one of the main current paths to reduce friction. After the success of the 1st workshop in 2015 [see http://www.lfs.usp.br/superlubricity2015], new scientific insights and industrial applications have raised. To mention just a few: new mechanisms for SL on carbon based coatings were proposed; SAE 0W-8 oils entered in production; SL was experimentally verified with coatings other than DLC on actual piston rings and formulated oils; mirror-like and laser textured cylinder bores are being used on both SI and CI engines. However, more fundamental and technological knowledge is still needed to fully understand the complex SL phenomenon. To obtain the SL benefits in terms of wear and fuel savings, a synergic study on lube additives, component coatings and surface finish is necessary. The two-day workshop will discuss state of art academic and industrial research in the fields of "surface functionalization" and "super-lubricity". More specifically the workshop will discuss synergic solutions (coating, lube additive, surface finish) that can lead to very low friction under the lubricated regimes found on automotive applications. Friction losses on engine and transmission are responsible for about 40% of car fuel consumption, hence its CO2 emissions. The European CO2 emission limits of 95, 81 and 66 CO2/km (respectively for 2021, 2025 and 2030) will need a portfolio of solutions but surely, they will demand drastic reduction of friction in the car mechanical systems. (AU)