| 摘要 |
A fuel injector for internal combustion engines provided with a fuel feeding channel (6), the feeding channel (6) displaying an axis (2) and an injection outlet (4); an injection valve (8) to control the outlet (4); the injection valve (8) displaying a shutter (16) arranged inside the feeding channel (6) to define, within the feeding channel (6), a first fuel introduction section (A1), the shutter (16) being movable from and to a closing position along the feeding channel (6), which displays a second section (A2); and an annular sealing seat (19) arranged on the feeding channel (6) upstream of the outlet (4); elastic means (11) for normally keeping the shutter (16) in the closing position; actuator means (7) connected to the shutter (16) to displace the shutter (16) itself from the closing position and to an opening position of the outlet (4); and hydraulic resistance means (23, 26; 28, 29) arranged along the feeding channel (6) upstream of the annular sealing seat (19) to balance the shutter (16).
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