Structure of an exhaust port in an internal combustion engine
US5816210A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2001/247
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A structure of an exhaust port (2) in an internal combustion engine is provided, which is capable of increasing the flow in the exhaust port (2) by regulating the flow of exhausted gases produced around a valve stem (4a). In the exhaust port (2) formed in a cylinder head (1), which has therein a boss (7) inserted with a valve guide (5) supporting a valve stem (4a) of an exhaust valve (4), a projection (3) is extended from the boss (7) of the valve guide (5) toward an opening port (P) and projects into the exhaust port (2). The projection (3) is provided on an exhaust-port wall (2a) opposite of an exhaust exit-port (E) about the valve stem (4a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.