Title

EVALUATION OF AN EXPERIMENTAL LUBE OIL ON PISTON FRICTION, ENGINE PERFORMANCE AND VEHICLE ACCELERATION

EVALUATION OF AN EXPERIMENTAL LUBE OIL ON PISTON FRICTION, ENGINE PERFORMANCE AND VEHICLE ACCELERATION

Authorship

Tomanik, Eduardo; Lastres, Luiz Fernando; Carvalho, Leonardo de Oliveira

Tomanik, Eduardo

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Lastres, Luiz Fernando

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Carvalho, Leonardo de Oliveira

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DOI

10.5151/5463-5463-17332

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Abstract

Two engine lubricant oils were investigated in regard to friction and vehicle performance. The products were a typical high viscosity commercial oil used at the Brazilian market and a low viscosity lubricant containing especial additives and friction modifiers, designed for racing applications. Comparison of the piston system friction was measured using the floating liner engine. Piston/Rings/Liner (PRL) friction was measured in 4 regimes, representative of urban conditions. In average, the low viscosity oil presented 52% lower friction, ranging from - 46% at 1500 rpm/20Nm to -59% at 2500 rpm/20Nm. The lube oils were also tested on a production 4 cyl., 1.4L gasoline engine, brake power gains from 1.9 to 2.7 % were observed with the low viscosity lube oil. The same oils were tested also regarding vehicle acceleration. The low viscosity oil showed from 4.4% reduced acceleration time from 40-60 km/h up to 6.3% from 60-100 km/h.

Two engine lubricant oils were investigated in regard to friction and vehicle performance. The products were a typical high viscosity commercial oil used at the Brazilian market and a low viscosity lubricant containing especial additives and friction modifiers, designed for racing applications. Comparison of the piston system friction was measured using the floating liner engine. Piston/Rings/Liner (PRL) friction was measured in 4 regimes, representative of urban conditions. In average, the low viscosity oil presented 52% lower friction, ranging from - 46% at 1500 rpm/20Nm to -59% at 2500 rpm/20Nm. The lube oils were also tested on a production 4 cyl., 1.4L gasoline engine, brake power gains from 1.9 to 2.7 % were observed with the low viscosity lube oil. The same oils were tested also regarding vehicle acceleration. The low viscosity oil showed from 4.4% reduced acceleration time from 40-60 km/h up to 6.3% from 60-100 km/h.

Keywords

Lubrication; Viscosity

Lubrication; Viscosity