Patent ID: 6155532
Filing Date: 2000-12-05
Classification: F02M

Abstract:
A valve for controlling fluids, comprising a housing (26) a valve member (22) in said housing which includes a piston (25) that is acted on by a restoring force and is designated for actuating said valve member (22), said piston, with a first end face as a movable wall, encloses a hydraulic coupling chamber (30) that is defined on another side by a second end face of an actuator piston (31) of a piezoelectric actuator (32), a flat spring (27) disposed within said coupling chamber between said first end face of said piston and said second end face of said actuator piston, said actuator piston (31) has an operating stroke against said flat spring (27) that generates a pressure increase in the coupling chamber (30), by means of which the piston (25) is moved counter to a restoring force, the coupling chamber (30) is connected to a fluid source by way of a filling valve (33, 42, 47) that opens in a direction of the coupling chamber and said flat spring (27) holds said actuator piston in contact with said piezoelectric actuator.