Piezoelectrically actuated quick-action hydraulic valve

A hydraulic valve comprising:

• a control piston;
• an actuating device for displacing the control piston;
• the hydraulic valve comprises:
• a housing;
• the control piston has a cross-sectional area AK, and the control piston is configured to be displaced in the housing in an axial direction of the control piston, and the control piston is configured such that a throughflow of a pressurized liquid may be set by the displacement of the control piston;
• and
• the actuating device includes:
• a flexurally rigid metal plate, having an outer peripheral region of the metal plate fixed to the housing in a stationary manner;
• a piezoelectric actuator operable into contact with the metal plate to bend a central region of the metal plate;
• and
• a pressure chamber configured to be filled with the pressurized liquid during operation of the valve;
• wherein the pressure chamber is delimited by the housing, the metal plate and the control piston;
• wherein the metal plate is configured to seal off the pressure chamber and the pressure chamber acts on the control piston;
• and
• an area AP of the metal plate over the pressure chamber is greater than a cross-sectional area AK of the control piston.