This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influence of Oil Balls on Premature Overlay Removal of Diesel Engine Connecting Rod Bearings
Annotation ability available
Sector:
Language:
English
Abstract
The influence of oil balls on the premature overlay removal of diesel engines connecting rod bearings is discussed. Oil balls are discrete spherical particles which embed in the bearing overlay. The elemental composition of oil balls include calcium, phosphorus (2:1 ratio), zinc and barium; elements which are also present in oil additives. Diesel engine manufacturers have observed a high incidence of premature overlay removal in upper connecting rod bearings.
An in-depth metallurgical analysis of field returned connecting rod bearings and laboratory engine tested connecting rod bearings indicated that bearing overlay was removed prematurely due to fatigue aggravated by corrosion. The oil balls, embedded in the bearing overlay, are considered one of the contributing factors in premature overlay removal, although their exact formation and embedment mechanisms are not understood.
Recommended Content
Technical Paper | Automotive Engine Bearings - 1964 |
Technical Paper | Plain Bearings for the High Speed Diesel Engine |
Technical Paper | Influence of Oil Drain Period on Connecting Rod Bearings in Linehaul Diesel Truck Engines |
Authors
Citation
Patel, M., "Influence of Oil Balls on Premature Overlay Removal of Diesel Engine Connecting Rod Bearings," SAE Technical Paper 810501, 1981, https://doi.org/10.4271/810501.Also In
References
- Hudgens R. D. Feldhaus L. B. “Diesel Engine Lube Filter Life Related to Oil Chemistry, ” SAE Paper 780974 November 1978
- Clevenger J. E. Rozalsky I. “In fluence of Oil Drain Period on Connecting Rod Bearings in Linehaul Diesel Truck Engines, ” SAE/SP-80/473 October 1980