Method of making an engine block using coated cylinder bore liners
US5671532A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1994 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Dec 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49865
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of making coated engine blocks by (a) casting a metallic engine block having one or more cylinder bores; (b) fabricating a thin walled liner for each bore, the liner being constituted of extruded metallic tubing having a cleansed inner surface, a wall thickness controlled to a thickness of 1-3 mm.+-.15 microns, the outer diameter of the liner being slightly greater than the internal diameter of the cylinder bores; (c) relatively rotating the liner with respect to one or more nozzles for applying a plurality of materials to the internal surface of the liner, the materials comprising first a metal texturing fluid that is applied at high pressures to expose fresh metal of the surface, secondly a bond coating material that is thermally sprayed to form a metallurgical bond with the liner internal surface, and a top coating of anti-friction material that is adheringly plasma sprayed to the bond coating; (d) honing the coated internal surface to remove up to 150 microns of top coating, leaving a finish surface that is concentric to the tube axis within .+-.15 microns; and (e) interference fitting the coated liner to the cylinder bore by freezing the liner while maintaining the bl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.