DYNAMIC FLOW CALIBRATION OF A FUEL INJECTOR BY SELECTIVE DIVERSION OF MAGNETIC FLUX FROM THE WORKING GAP

摘要

An injector (10) of electromagnetic controlled fuel comprises a dynamic flow calibration mechanism wherein an adjusting rod (80) extending between holes (84, 88) formed in both the stator (28 ) and the armature (30), penetrating the holes, is selectively positioned to divert a portion of the magnetic flux from the axial gap (51) between the stator (28) and the armature (30) , so that the diverted magnetic flux passes through the adjustment rod (80) directly between the stator (28) and the armature (30) without passing through the gap (51). A non-magnetic tube (82) is arranged between the adjusting rod (80) and the holes in the stator and armature (84, 88). The portion of the tube (82) in the hole (84) of the stator is connected to the stator (28) while the portion located in the hole (88) of the armature serves to guide the latter (30). In one type of injector (10) to supply fuel from the bottom, the tube (82) also serves to prevent the fuel inside the injector (10) humidifies the adjusting rod (80) . The injector (10) fuel is dynamically calibrated by selectively positioning the control rod (80) by means of an external tool that comes into contact with the rod (80) so that the stream diverted leads between the stator and the armature (30) is passed through the adjustment rod (80) without passing through the gap (51).