FUEL INJECTOR
DRIVE
November 30, 2016
The invention relates to a fuel injector for injecting fuel into a combustion chamber (1) of an internal combustion engine, comprising a nozzle needle (2) which is accommodatively received in a stroke-moving manner for releasing and closing at least one injection opening (3) in a high-pressure bore (4) of a nozzle body (5), furthermore comprising an annular magnetic coil (6) for acting on a stroke-moving armature (7) which is hydraulically couplable to the nozzle needle (2) via an armature shaft (8). According to the invention, an end face (A1, A2) of the armature shaft (8) facing the nozzle needle (2), or a contact element (9) connected to the armature shaft (8), has at least one elevation (10) for contacting a stop face (11) forming the lower stroke stop for the armature (7), so that the end face (A1, A2) cooperates with the stop face (11) forming a squeeze gap (12).
Discussion in the ATmosphere