Method for producing a piston for an internal combustion engine
US8011095B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 2005 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Nov 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49259
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for producing a piston for a combustion engine comprising a combustion recess, during which an annular fiber preform for reinforcing the edge of the combustion recess is firstly fastened inside the casting mold. Afterwards, a low-silicon aluminum/copper melt is introduced into the casting mold by which the fiber preform is infiltrated and molded into the recess edge within the scope of the casting process. The piston blank produced in this manner is then subsequently compacted by a high-temperature isostatic pressing before the piston is completed by means of a machining completion process. The flanks and the base areas of the second and third annular groove are coated by means of anodic oxidation, and the hub boreholes are smoothed and hardened by roller-burnishing. This results in a very high-quality and heavy-duty piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.