Patent ID: 6843464
Filing Date: 2005-01-18
Classification: F02M

Abstract:
1. A valve for controlling fluids, comprising a piezoelectric actuator unit ( 20 ) for actuating a valve member, which valve has at least one adjusting piston ( 19 ) and at least one actuating piston ( 16 ) that is guided in a valve body ( 15 ) and actuates a valve closing body, which valve closing body cooperates with at least one valve seat ( 24 ) embodied on the valve body ( 15 ) and in the closing direction disconnects a control bore ( 14 ) from an outlet chamber ( 25 ), from which a return conduit ( 26 ) branches off, wherein between the adjusting piston ( 19 ) and the actuating piston ( 16 ), a hydraulic chamber ( 18 ) is disposed, which transmits a motion of the adjusting piston ( 19 ) to the actuating piston ( 16 ), the actuating piston ( 16 ), at least when the valve closing body is closed, being supported essentially in a hydraulically force-balanced fashion.