Piston for internal combustion engines
US4987867A · kind A · utility
7Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1989 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Nov 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston for internal combustion engines has a piston-ring groove which is strengthened with a composite layer based on porous metal which is embedded around the piston-ring groove. The porous metal contains at least more than 10% Cr, and the volumetric ratio of the porous metal is between 8 to 70%, so that even though the engine is put in action under high heat loads, no crack is initiated in the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.