| 摘要 |
<p>The fitting (6) has a high-pressure fuel supply conduit (26), and the injector (5) has a hollow body (7) having a threaded seat (22) engaged by a threaded portion (23) of the fitting (6). The fitting (6) has a shoulder (37) located between the threaded portion (23) and another portion (27) of the fitting, and the hollow body (7) has a shoulder (38) on a non-recessed outer surface (39) of the hollow body. The two shoulders (37, 38) are precision machined so they are parallel in use; and the usual high-pressure fuel sealing washer (41) is inserted between the two shoulders (37, 38) so machined. More specifically, the shoulder (37) of the fitting (6) has a groove (42) housing the washer (41), and the shoulder (38) of the hollow body (7) undergoes circular spot facing to form a series of circular cavities concentric with the axis of the threaded seat (22) and characteristic of Ra = 1.6 surface roughness. <IMAGE></p> |
