Ventil zum Steuern von Flüssigkeiten

摘要

The invention relates to a valve for regulating liquid flow, actuated by means of a liquid-filled coupling chamber (30) situated between an actuator piston (31) of a piezo-actuator (32) and a piston (25) actuating a valve element (22). In order to reduce the danger of leakage, both pistons (25, 31) enclosing the coupling chamber (30) are fitted with a contact pressure intensifier (35) which enables expansion of the actuator piston (31) and/or of the piston (25) actuating the valve element (22) in the region of their end faces (29). The inventive valve is used in fuel injection devices for internal combustion engines of motor vehicles.