A Study of Engine Bearings Friction Loss Reduction Under Hydrodynamic Lubrication Conditions Daido Metal Company, Limited

Format:

Book

Conference/Event

Author/Creator:

Koushima, Motohiko, author.

Contributor:

Itoigawa, Hiroshi

Tamura, Tadamichi

Conference Name:

WCX SAE World Congress Experience (2022-04-05 : Detroit & Online, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2022

Summary:

The mechanical loss reduction of the bearing reduces the fuel consumption of the engine, which can help realize a sustainable society. Thus, a bearing friction reduction technique has been studied. There have been many studies related to friction-reduction techniques for mixing and boundary lubrication. However, there are few studies on hydrodynamic lubrication, and the main methods have been related to changing the low-viscosity oil and bearing size. In driving passenger cars in urban areas, the lubricant condition of the engine bearings is largely dependent on hydrodynamic lubrication. Therefore, the power loss under this operating condition cannot be ignored.In this study, the reduction of the friction loss under hydrodynamic lubrication was focused. A method for reducing the shear resistance of oil was examined and its effect was confirmed through experiments and calculations. The test was conducted using a static load-bearing tester designed for the friction measurement under hydrodynamic lubrication. To further reduce this loss, it was confirmed that the properties of the bearing surface should be oil-repellent rather than lipophilic. Furthermore, the swell shape of the bearing surface showed good results parallel to the direction of rotation. Bearing roughness lowers friction because of its fine surface

Notes:

Vendor supplied data

Publisher Number:

2022-01-0324

Access Restriction:

Restricted for use by site license