Method for in-situ forming of low friction coatings on engine cylinder bores
US9133739B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2013 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Sep 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.