Coating cylinder bores without prior activation of the surface
US10920308B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2017 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Jul 13, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F1/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Cylinder of piston-type internal combustion engine includes at least one bore with inner shell formed from a base material. The base material, in a region of the bore, includes a layer system, and a first boundary surface formed between base material and layer system. Layer system includes at least one thermally sprayed layer forming at least partially a shell surface of the bore and acts there as a functional layer. First boundary surface does not include any profiling applied for mechanical activation of the surface apart from surface roughness resulting from manufacture of the bore. The material of the layer system includes molybdenum and at least one further element in the region of the boundary surface to the base material and is bonded to the base material by a chemical bond. This boundary surface material differs from the material of the functional layer in composition and/or structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.