| 摘要 |
<p>An injection nozzle (2) for an internal combustion engine comprising a nozzle body (3) defining a seating surface (3) and having at least one first nozzle outlet (9) and a valve member (8) received within the nozzle body (3) and engageable with an external seating (11) defined by the seating surface (7) so as to control fuel injection through the at least one first nozzle outlet (9). The valve member (8) is provided with a bore (32) having an internal bore surface and an insert (31; 57) is received within the bore (32). The insert (31; 57) includes a part-spherical head (34) which spans an internal diameter of the bore (32) so as to maintain contact with an internal surface of the bore (32) as the valve member (8) moves, in use, so as to guide movement of the valve member (8). The part-spherical head (34) also includes a surface which defines an internal seating (50) for the valve member (8).</p> |
