Actuator module with coated piezoactuator used in fuel injection system of internal combustion engine, has press ring arranged on flexible hose to seal portion between flexible hose and actuator head or actuator foot of piezoactuator

摘要

The actuator module (20) has a piezoactuator (21) that has a piezoelement enclosed by a case surrounded with elastomer layer. The actuator module also has a flexible hose (26) that shrinks under temperature influence. The flexible hose is fitted within the installation range of the actuator head (22) or actuator foot (23) of the piezoactuator. A press ring (27) is arranged on the flexible hose to seal the portion between the flexible hose and actuator head or actuator foot of the piezoactuator.