Brennstoffeinspritzventil

摘要

The fuel injector (1) comprises a hollow body (2) housed in which is a metering valve (8) for the injection, having a calibrated pipe (12) for outlet of the fuel from a control chamber (11). The calibrated pipe (12) is normally kept closed by a shutter (13) controlled by an electromagnet (17) comprising a magnetic core (19) and an electric coil (26) housed in an annular slot (24) of the core (19). The coil (26) has an outer cylindrical surface (33), which forms with the annular slot a gap (61) so as to be lapped by the fuel coming out of the calibrated pipe (12). In particular, the coil (26) comprises a bobbin (28) having a pair of appendages (39) for supporting a pair of plugs (34) for electric supply of the coil (26), which are englobed at least in part in a block (42) of non-magnetic material. The bobbin (28) has a substantially cylindrical rib (29), and two plane and parallel flanges (31, 32), one (31) of which is adjacent to an end portion (36) of the plugs (34), whilst the other (32) has a smaller diameter so as to form a passage (63) for the fuel between the calibrated pipe (12) and the gap (61).