| 摘要 |
<p>In an electroinjector of the type comprising a ferromagnetic core (10) surrounded by an actuator coil (13) and an armature (12) bearing an element (17) for the closure of the injection nozzle (21), as well as an annular shoulder element (24) solid with the core (10) and against which the armature (12) comes to rest in its position of opening of the fuel passage through the injection nozzle (21), the annular element (24) is assembled in position by means of an impulsive action involving a plastic deformation of a portion of the core (10) or of a separated element interposed between the annular element (24) and the core (10). In this way, the core and the annular element can be manufactured by medium-precision machining steps and the end precision of the dimension of the axial clearance between the annular element and the core is established in the assembly step, allowing precise dimensions to be maintained for all the various mass-produced injectors, with limited costs.</p> |
