Fuel injector with high stability of operation for an internal-combustion engine

摘要

The injector (1) comprises a dosing servo valve (5) for controlling a rod (10) for opening/closing a nebulizer. The servo valve (5) has a valve body (7) having a control chamber (26) provided with an outlet passage (42a) that is opened/closed by an open/close element (47) that is axially movable. The open/close element (47) is separate from an anchor (17) of an electromagnet (16), and is slidable on an axial guide element (41) for closing the outlet passage (42a). The open/close element (47) is held in the closing position by a spring (23) acting through an intermediate body (12a). The anchor (17) can be displaced with respect to the axial guide element (41) between a flange (24) of the intermediate body (12a) and a projection element (62) of the guide member (41), for eliminating the rebounds of the open/close element (47) upon closing of the solenoid valve (5).