Method of reducing the wear of metal and ceramic surfaces
AssigneeExxon Research & Engineering Co.
InventorsJacob J. Habeeb, Alan G. Blahey, William N. Rogers
Life of this patent
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Abstract
The use of oxidants such as hydroperoxides in a lubricating oil have been found to be effective in reducing the war of one or more metal and/or ceramic surfaces in contact with an advanced ceramic surface. The reduced wear may be obtained in the absence of conventional antiwear additives such as zinc dialkyldithiophosphate.
Claims40
A method for reducing the wear of at least one metal surface, at least one ceramic surface, or at least one metal and ceramic surface that is in contact with an advanced ceramic surface which comprises contacting the surfaces in the presence of a lubricating oil containing a lubricating basestock and an effective amount of an oxidant, said contacting occurring for a period of time sufficient to cause a reduction in the wear of said metal surface, said ceramic surface, or said metal and ceramic surface.
A method for reducing the wear of at least one metal surface that is in contact with an advanced ceramic surface which comprises contacting said surfaces in the presence of a lubricating oil containing from about 0.01 to about 2.5 wt. % of an oxidant for a period of time sufficient to cause a reduction in the wear of said metal surface.
A method for reducing the wear of a metal camshaft lobe due to contact with a follower in an internal combustion engine which comprises:
- (a) using a follower having an advanced ceramic follower pad, and
- (b) contacting said camshaft lobe and said follower pad in the presence of a lubricating oil containing an oxidant in an amount sufficient to cause a reduction in the wear of said camshaft lobe.
A method for reducing the wear of an advanced ceramic camshaft lobe due to contact with a follower in an internal combustion engine which comprises:
- (a) using a follower having a metal folIower pad, and
- (b) contacting said camshaft lobe and said follower pad in the presence of a lubricating oil containing an oxidant in an amount sufficient to cause a reduction in the wear of said follower pad.
Dependencies are inferred from the claim text.