Method for in-situ forming of low friction coatings on engine cylinder bores
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United States of America Patent
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Sep 15, 2015
Grant Date -
Dec 5, 2013
app pub date -
May 14, 2013
filing date -
May 30, 2012
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Abstract
A low friction coating for an internal combustion engine and a method of forming a low friction surface on at least one of the engine's friction-sensitive components. In one form, a solid lubricant precursor additive is combined with motor oil such that upon work being performed on the combination by adjacently-interacting engine components, the solid lubricant tribochemically reacts to form a friction-reducing coating or film. In one preferred form, the coating or film is triboformed on a cylinder bore or a liner configured to fit within the bore. The reciprocating movement between the cylinder or liner and a piston and/or piston rings promotes in-situ formation of the layer after the engine has already been manufactured rather than during engine fabrication or assembly.
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