Piezo-hydraulic actuator for controlling gas shuttle valve by combustion engines, has print medium in pressure chamber to exert force on piston by principle of hydraulic transformation, so that valve disk is displaced over valve stem

摘要

The piezo-hydraulic actuator (1) has piezo stack (6) with which a regulating distance-increasing force is exerted on over a directly and actuated lever (2) according to the lever principle. A print medium in pressure chamber (13) exerts a force on the piston (15) by the principle of the hydraulic transformation, so that valve disk (18) is displaced over valve stem (17) against a reaction force to open/exhaust valve.