Fuel economy additive and lubricant composition containing same

Details Fuel economy additive and lubricant composition containing same Fuel economy additive and lubricant composition containing same

1997-04-08

1999-01-26

Howard, Jacqueline V.

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Organic -co- compound

508463, C10M12974

Patent

active

058638733

ABSTRACT:
A lubricant composition capable of improving the fuel economy of an internal combustion engine and comprising a base oil as a major component and from about 2 to about 15 wt. %, based on the weight of composition, of a fuel economy improving additive having a viscosity greater than the viscosity of the bulk lubricant and being selected such that the lubricant is characterized by (1) a positive deviation from that of a theoretical line when the elastohydrodynamic (EHD) film thickness thereof is plotted against entrainment speed on a log basis, and by (2) a traction coefficient under both hydrodynamic and mixed lubrication conditions which is lower than it would have been if the fuel economy improving additive were not present in the lubricant is disclosed.

REFERENCES:
patent: 3620290 (1971-11-01), Kress et al.
patent: 3850827 (1974-11-01), Zipf
patent: 4175046 (1979-11-01), Coant et al.
patent: 4175047 (1979-11-01), Schick
patent: 4304678 (1981-12-01), Schick et al.

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