Fluid control valve for common-rail fuel injection system, has piezoactuator and filling device compensating leakage fluid loss at hydraulic transducer of control valve

摘要

The fluid control valve has a piezoactuator (2), a hydraulic transducer (3) with a pressure space (6) between 2 pistons (4,5), a control valve (8) and a filling device for compensating leakage fluid losses at the hydraulic transducer by fluid from the control valve. The filling device may use a filling line (11,20), which connects the hydraulic transducer with the control space (9) of the control valve, upon operation of the control valve control element (10) via the piezoactuator.