Fluid flow control valve for motor vehicle Diesel engine fuel injection has hydraulic connector with pair of nested pistons defining coupling chamber

摘要

The fluid flow control valve for a common rail fuel injection system has a hydraulic connector (2) with a first piston (3) and a second piston (6) defining a connecting chamber (7) filled with liquid. A piezo-electric actuator (13) cooperates with the first piston. The first piston is pot shaped and has a chamber (4) to receive the second piston.