Hydraulic actuator for operating e.g. gas exchange valve, has piston that has axially movable piston rod and internal piston section, in which balance chamber filled with liquid is formed between piston rod and internal piston section

摘要

The actuator has a piston (5) movably arranged in the actuator housing (1). The piston has a piston rod (8) and an internal piston section (9) that are axially movable. A balance chamber (23), filled with liquid, is formed between the piston rod and internal piston section. The internal piston section encloses the piston rod. An external piston section (10) encloses the internal piston section.