A Literature Review of the Effects of Piston and Ring Friction and Lubricating Oil Viscosity on Fuel Economy

Format:

Conference/Event

Author/Creator:

McGeehan, James A., author.

Conference Name:

Passenger Car Meeting and Exposition (1978-06-05 : Troy, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1978

Summary:

This paper reviews piston and ring friction which can account for 65% of the mechanical friction in an internal combustion engine. It shows that cylinder liner lubrication is predominantly hydrodynamic with localized contact between ring and liner at TDC firing. The degree of contact may increase during transient conditions. Piston ring friction in the hydrodynamic region is proportional to the square root of the viscosity. The viscosity is affected by temperature and pressure which can reach peak values of 340°F and 4000 psi, respectively. Gains in fuel economy through viscosity reductions have been reduced in the last 25 years due to changes in piston and ring design

Notes:

Vendor supplied data

Publisher Number:

780673

Access Restriction:

Restricted for use by site license