Patent ID: 6502803
Filing Date: 2003-01-07
Classification: F02M,Y10S

Abstract:
A valve for controlling fluids, comprising: a valve member (2), which is axially displaceable in a bore (5) of a valve body (6) and on its end has a valve head (7) forming a valve closing member, which cooperates with a seat (8), provided on the valve body (6), for opening and closing the valve (1), and having a piezoelectric actuator (3) for actuating the valve member (2), and a hydraulic chamber (21) disposed on a side of the piezoelectric actuator (3) remote from the valve member (2), wherein said hydraulic chamber (21) communicates with the bore (5) of the valve member (2) via at least one hydraulic line (23), the bore being sealed off from the piezoelectric actuator (3), and wherein a piston (20) connected to the piezoelectric actuator (3) plunges Into said hydraulic chamber (21), the hydraulic chamber (21) comprising a hydraulic spring, wherein a spring force of said hydraulic spring acting on the piston (20) connected to the piezoelectric actuator (3) acts as a prestressing element for the piezoelectric actuator (3) and a tolerance compensating element for compensating for elongation tolerances of the piezoelectric actuator (3) and/or other valve components (2, 6).