Fuel control valve for fuel injector in motor vehicle common rail diesel internal combustion engine has actuating module biased by spring with constrained axial effect to reduce transverse forces acting on regulating piston

摘要

The valve (10) includes a valve housing (11) with an actuating chamber (12) containing a piezoelectric actuator (13) that moves a valve element sliding axially in a valve body (22), with the actuator acting on a regulating piston (19) so that a movable piston (24) cooperates with the regulating piston via a hydraulic coupler (23). The piezoelectric actuator is biased by a first constrained axial effect spring (33) and the regulating piston is loaded in the direction of the actuator, reducing the forces acting transversely on the regulating piston.