PIEZO SENSOR SYSTEM FOR DETECTING THE NEEDLE LIFT OF A NOZZLE OF A COMMON RAIL INJECTOR

摘要

The invention relates to a nozzle needle (4) of a nozzle (1), which is located inside an injector housing and is braced against a housing shoulder (5) by means of a spring (2). A piezo element (7), which determines the nozzle needle path during the opening or closing of the nozzle opening (3), is situated between the spring (2) and the housing shoulder (5). For this purpose, the piezo element (7) has two electric connections (8.1, 8.2) in the vicinity of its corresponding front faces (7.1, 7.2).