Piezoelectric actuator module for fuel injection valve of fuel injector in air-compressing, auto-ignition internal combustion engine, has electric lines comprising wire with insulating layer that is made of ethylene-tetrafluoroethylene

摘要

#CMT# #/CMT# The module (2) has a transition piece (14) connected with a piezoelectric actuator (10), and comprising through-holes (22, 23) through which electric lines (20, 21) are guided to the piezoelectric actuator. The electric lines comprise a wire (27) with an insulating layer (42) made of plastic. The electric lines are guided into an insulating sleeve (29) in an area-wise manner in the transition piece. The layer is formed from fluorinated ethylene propylene (FEP) plastic or ethylene-tetrafluoroethylene (ETFE). The insulating sleeve includes two cylindrical regions with different diameters. #CMT#USE : #/CMT# Piezoelectric actuator module for a fuel injection valve of a fuel injector in an air-compressing, auto-ignition internal combustion engine. #CMT#ADVANTAGE : #/CMT# The electric lines comprise the wire with the insulating layer that is formed from the FEP plastic or ETFE, so that tendency to short circuits during thermal cycling can be prevented or reduced, thus increasing efficiency of the actuator module. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a fuel injection valve with a piezoelectric actuator module in partial section. 2 : Piezoelectric actuator module 10 : Piezoelectric actuator 14 : Transition piece 20, 21 : Electric lines 22, 23 : Through-holes 27 : Wire 29 : Insulating sleeve 42 : Insulating layer.