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Lubricant viscosity and viscosity improver additive effects on diesel fuel economy |
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| Authors: | Margareth Judith Souza de Carvalho Peter Rudolf Seidl Carlos Rodrigues Pereira Belchior José Ricardo Sodré |
| Affiliation: | a Federal University of Rio de Janeiro, School of Chemistry, Technology Center, Bloco E, Ilha do Fundão, CEP 21949-900, Rio de Janeiro, RJ, Brazil b Federal University of Rio de Janeiro, Department of Mechanical Engineering, Cidade Universitária, P.O. Box 68503, CEP 22245-110, Rio de Janeiro, RJ, Brazil c Pontifical Catholic University of Minas Gerais, Department of Mechanical Engineering, Av. Dom José Gaspar, 500, CEP 30535-610, Belo Horizonte, MG, Brazil |
| Abstract: | This work verifies the impact of lubricant viscosity and viscosity improver additives on diesel fuel economy. Eight lubricants were tested in a single-cylinder, four-stroke, direct injection diesel engine mounted on a dynamometer, under different load and speed conditions. Engine friction power was also investigated through Willans’ line. The results demonstrate that fuel economy obtained from multigrade viscosity oils is higher than that obtained from monograde viscosity oils. A linear relationship was obtained between the high temperature high shear viscosity and specific fuel consumption. The lubricant which provided lower fuel consumption also required lower friction power. |
| Keywords: | Lubricants Viscosity Fuel economy Diesel engine |
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