Piezoelectric actuator

摘要

A piezoelectric actuator arrangement (30) for use in a fuel injector (2), the actuator arrangement (30) comprising a stack (36) of one or more piezoelectric elements for receipt with an fluid chamber (12) of the injector (2), electrode means for generating an electric field within the stack (36), in use, and an electrical connector arrangement (42) for electrically connecting the electrode means to an external power supply, in use. The connector arrangement (42) comprises a first portion (60) in the form of a base member, and a second portion (62) in the form of a body member, that are mutually arranged to form an articulated joint so as to provide the first portion (60) with at least one degree of freedom relative to the second portion (62).