| 摘要 |
An improvement in fuel flow through orifices (30) of a thin disc orifice member (22) is obtained by incorporating a radially inwardly open undercut (44) in the seat member (20) below the frustoconical seating surface (26) and above the thin disc orifice member. The undercut provides a space that allows a fuel recirculation zone to be displaced further radially outwardly so that it poses less of an obstruction to flow toward the orifice. |
