To provide a method of assembling a fuel injector, which prevents considerable increase in the size of an actuator device, since a space for providing the actuator device inside the fuel injector is limited.
The method for assembling the fuel injector comprising a fuel injector main body having an accumulator defined therein is described. The method comprises: providing an encapsulated actuator device having a piezoelectric actuator stack and electrical connector means, wherein the stack is encapsulated in a sleeve member; providing a volume of sealing material in the region of the electrical connector means; locating the encapsulated actuator device inside the accumulator; applying heat indirectly to the volume of sealing material so as to soften the volume of the sealing material; and applying pressure to the encapsulated actuator device such that the volume of sealing material deforms to form a substantially fluid-tight seal between the encapsulated actuator device and the accumulator in the region of the electrical connector means.
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Yuriko Hamada