Abstract:
The positioning of an actuating drive in a fuel injector having a piezo actuator that is screwed in the housing (1) of the fuel injector is effected by applying voltage (U) to the piezo actuator (2), said voltage corresponding to a predetermined return stroke ( DELTA h) and surface grinding between the housing (3) and the base plate (4) of the piezo actuator (2) when said voltage (U) is applied. A compensating ring (9) is additionally provided between the housing (1) of the fuel injector and the housing (3) of the piezo actuator (2).