Cylinder head for internal combustion engine
US6240891A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Jun 23, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cylinder head for a combustion engine of diesel type has an inlet duct (10) of so-called tangential type whose mouth leading into the combustion chamber (3) is controlled by a conventional mushroom valve (14). The valve cooperates with a valve seat (11) formed in a valve seat ring (12) which is arranged in a milled recess (13) which surrounds the mouth of the inlet duct (10). At a shoulder surface (19) formed by the milled recess (13) the valve seat ring (12) connects to the inlet duct (10) at a larger diameter than that exhibited by the inlet duct at the shoulder surface. The valve seat ring (12) further has, on its side facing radially inwards, an arcuate shape (20) on at least part of the valve seat ring (12) which defines the latter's throughflow area. This makes it possible for the inlet air leaving the inlet duct not to be subject to substantial disturbances of flow even if there is a certain lack of concentricity at the connection between the inlet duct (10) and the valve seat ring (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.