| 摘要 |
An injection valve is indicated for internal combustion engines, having a sealing seat formed by a valve seat and a closing head of a valve needle, and having a plurality of spray holes situated downstream from the sealing seat. The spray holes, which are stepped in cross-section, each have at least one upstream hole inlet section having a very small hole cross-section and a hole inlet opening, and a downstream hole outlet section having a very large hole cross-section and a hole outlet opening. In order to prevent unwanted deposition of burnt fuel on the edges of the hole outlet openings, all the hole outlet sections are connected to one another by a groove having a groove opening that points downstream. |
