Patent ID: 6250563
Filing Date: 2001-06-26
Classification: F02M

Abstract:
A fuel injection valve, comprising:an inflow duct;a nozzle body having a control chamber formed therein, said control chamber connected to said inflow duct;a nozzle needle disposed at least partially in said control chamber, a pressure in said control chamber being operatively connected to said nozzle needle, and the pressure in the control chamber controlling said nozzle needle;a return duct;a servovalve disposed between said control chamber and said return duct, said servovalve having a closing body and an associated valve seat, in a closed position of said servovalve said closing body closing an outflow, said closing body having a closing head in a form of a part-sphere and associated with said valve seat, said closing body having a central head flattening associated with said valve seat, said closing body further having a closing stem merging with said closing head, said servovalve having a valve spring surrounding said closing stem and pre-stressing said closing head against the valve seat;a tappet guided by said valve seat; andan actuator for actuating said closing body, said actuator being operatively connected to said tappet which in turn bears on said central head flattening.