Investment-cast piston crown cap with encapsulated non-metallic insulating core
US4939984A · kind A · utility
24Cited by
14References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jun 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49258
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Pistons for internal combustion engines, particularly compression ignition engines. The pistons have insulating crowns and include a crown having a cap thereon, extending over the crown surface area, the crown cap being composed of an iron-based or a nickel-based alloy and having on the underside thereof ribs which are encast into an aluminium alloy which forms the piston body. The crown cap further includes a ceramic insert encapsulated therein. The ceramic insert may also be leached out by chemical means to leave a void in the cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.