Al or Al alloy poppet valve and a method of manufacturing the same
US6073912A · kind A · utility
6Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1998 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Aug 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49405
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An Al alloy poppet valve is used in an internal combustion engine. The poppet valve comprises a valve stem and a valve head at the end of the valve stem. The valve head has a tapered valve face, which is engaged on a valve seat when an inlet port is closed by the poppet valve. The valve face has a thermal hardened layer on the surface and an inner alloy layer, thereby increasing mechanical strength to provide high durability and reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.