Piezoelectric actuator for fuel injection system, has stack accommodated by housing, and rubber bushing sealing gap between cable and housing, where bushing has core wire inserting hole that accommodates core wire

摘要

The actuator has a piezoelectric stack (1) accommodated by a housing, and a connecting cable (3) with an end connected with the stack and another end extending from the housing toward an exterior of the housing. A sheathing unit (32) covers a core wire (31). A rubber bushing (4) seals a gap between the cable and the housing. The bushing has a core wire inserting hole that accommodates the core wire, where the core hole has a diameter of an internal wall, which enables an external peripheral surface of the core wire to stand in contact with the internal wall.